CN215008445U

CN215008445U - Square lithium ion battery module end plate

Info

Publication number: CN215008445U
Application number: CN202120604998.1U
Authority: CN
Inventors: 徐庆庆; 丁中强; 张志杰
Original assignee: Gotion High Tech Co Ltd
Current assignee: Gotion High Tech Co Ltd
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2021-12-03
Anticipated expiration: 2031-03-24

Abstract

The utility model discloses a square lithium ion battery module end plate, including lower apron, upper cover plate and pressure detection spare, wherein: the lower cover plate is arranged on the battery shell and is used for covering the battery shell; the pressure measurement spare is fixed in the lower bottom surface of upper cover plate, and the detection head of pressure measurement spare is contradicted with lower apron, and the upper cover plate is located apron top down, forms the deformation space between upper cover plate and the lower apron, and the conductor wire of pressure measurement spare is located the deformation space. The utility model discloses in, the square lithium ion battery module end plate that provides establishes lower apron lid on battery case to in placing the space with the battery, the upper cover plate contacts with the top of placing the space, if the battery takes place the inflation, the battery expansibility is through lapping the transmission down, and make lower apron rebound, then deformation takes place for the detected value of pressure measurement spare, can obtain the battery in the change of charge-discharge in-process expansibility, satisfy not unidimensional direction battery end plate through changing the lower apron of different specification sizes.

Description

Square lithium ion battery module end plate

Technical Field

The utility model relates to a lithium cell technical field especially relates to a square lithium ion battery module end plate.

Background

With the rapid development of new energy automobiles, the power battery is used as a core component of the electric automobile, and the lithium ion battery is widely concerned. Lithium ion battery first need be in groups through the series-parallel connection, then establish ties the battery module and form the battery package, and the battery needs to retrain fixedly when making the module, and the restraint power of battery when in groups all has certain influence to battery circulation and security performance.

The square lithium ion battery generally uses metal aluminum as a battery shell, the aluminum material is soft, the internal pressure of the battery is increased due to expansion, gas generation and the like of the battery in the using process, and the increase of the internal pressure of the battery can be reflected by monitoring the change of the external expansion force of the battery. When the battery is out of control due to heat, a large amount of gas is generated in the battery, the expansion force of the gas is changed rapidly, and the battery out of control due to heat can be warned according to the change trend of the expansion force of the battery. Since the batteries need to be fixed and restrained when being grouped, how to implant the expansion force monitoring device in the module becomes a research subject.

SUMMERY OF THE UTILITY MODEL

For the technical problem who exists among the solution background art, the utility model provides a square lithium ion battery module end plate.

The utility model provides a square lithium ion battery module end plate, including lower apron, upper cover plate and pressure detection spare, wherein:

the lower cover plate is arranged on the battery shell and is used for covering the battery shell;

the pressure measurement spare is fixed in the lower bottom surface of upper cover plate, and the detection head of pressure measurement spare is contradicted with lower apron, and the upper cover plate is located apron top down, forms the deformation space between upper cover plate and the lower apron, and the conductor wire of pressure measurement spare is located the deformation space.

As the utility model discloses the scheme of further optimization, the upper surface of apron is opened down has the notch, and the detection head of pressure detection spare extends to in the notch.

As the utility model discloses the scheme of further optimization still includes the location slide bar, and on the apron under the one end installation of location slide bar, the vertical slidable mounting of other one end of location slide bar was on the upper cover plate.

As the utility model discloses the scheme of further optimization, it has the location slide opening to open on the upper cover plate, and the location slide opening matches with the location slide bar.

As a further preferred embodiment of the present invention, the positioning sliding rods are provided with a plurality of positioning sliding rods, and the plurality of positioning sliding rods are all disposed on the lower cover plate.

As a further preferred embodiment of the present invention, the positioning slide rods are four, and four positioning slide rods are respectively disposed at four corners of the lower cover plate.

As the utility model discloses the scheme of further optimizing, upper cover plate and lower apron are the aluminum alloy plate.

As the utility model discloses the scheme of further optimizing, pressure measurement spare is pressure sensor.

The utility model discloses in, the square lithium ion battery module end plate that provides establishes lower apron lid on battery case to in placing the space with the battery, the upper cover plate contacts with the top of placing the space, if the battery takes place the inflation, the battery expansibility is through lapping the transmission down, and make lower apron rebound, then deformation takes place for the detected value of pressure measurement spare, can obtain the battery in the change of charge-discharge in-process expansibility, satisfy not unidimensional direction battery end plate through changing the lower apron of different specification sizes.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a front view of the present invention;

fig. 3 is a schematic view of the structure of the lower cover plate of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar designations denote like or similar elements or elements having like or similar functionality throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

A square lithium ion battery module end plate as shown in fig. 1-3, comprising a lower cover plate 1, an upper cover plate 2 and a pressure detection member 3, wherein:

the lower cover plate 1 is arranged on the battery shell and used for covering the battery shell;

the pressure detection piece 3 is a pressure sensor, the pressure detection piece 3 is fixed on the lower bottom surface of the upper cover plate 2, a detection head of the pressure detection piece 3 is abutted against the lower cover plate 1, the upper cover plate 2 is positioned above the lower cover plate 1, a deformation space is formed between the upper cover plate 2 and the lower cover plate 1, and a conducting wire of the pressure detection piece 3 is positioned in the deformation space;

in order to facilitate the expansion force of the lithium battery to be transmitted to the pressure detection piece 3 through the lower cover plate 1 after the lithium battery is expanded, a notch 10 is formed in the upper surface of the lower cover plate 1, and a detection head of the pressure detection piece 3 extends into the notch 10;

in order to prevent the deformation of the lithium battery from tilting a certain position of the lower cover plate 1 and further reducing the expansion force on the pressure detection piece 3, the lithium battery detection device further comprises a positioning sliding rod 4, one end of the positioning sliding rod 4 is installed on the lower cover plate 1, and the other end of the positioning sliding rod 4 is vertically and slidably installed on the upper cover plate 2, so that the precision of the pressure detection piece 3 on the expansion force detection of the battery is ensured;

the upper cover plate 2 is provided with positioning sliding holes 20, the positioning sliding holes 20 are matched with the positioning sliding rods 4, in order to avoid the situation that the periphery of the lower cover plate 1 is tilted to influence the pressure detection part 3 to detect the expansion force of the battery, four positioning sliding rods 4 are arranged, and the four positioning sliding rods 4 are respectively arranged at four corners of the lower cover plate 1;

the upper cover plate 2 and the lower cover plate 1 are both aluminum alloy plates, so that the service life is long, and the expansion force is convenient to transfer.

In the working process of the embodiment: the lower cover plate 1 is covered on a battery shell, a battery is placed in a space, the upper cover plate 2 is in contact with the top of the space, if the battery expands, the expansion force of the battery is transmitted through the lower cover plate 1, and the lower cover plate 1 moves upwards, the detection value of the pressure detection piece 3 deforms, so that the change of the expansion force of the battery in the charging and discharging processes can be obtained, the battery end plates with different sizes and directions can be met by replacing the lower cover plates 1 with different specifications and sizes, when the expansion amount of the lithium battery is small, the lithium battery expands to extrude the lower cover plate 1 and further enable the positioning sliding rod 4 to slide in the positioning sliding hole 20 until the upper surface of the positioning sliding rod slides to be in the same plane with the upper surface of the upper cover plate 2 and is abutted against the top of the battery installation space, if the lithium battery continues to expand to position the positioning sliding rod to abut against the lithium battery opposite to the positioning sliding rod, so that the expansion force of the lithium battery is concentrated towards the position close to the pressure detection piece 3, thereby increasing the detection accuracy thereof.

In order to transmit the expansion force to the pressure detection member 3 through the lower cover plate 1 after the lithium battery expands, it is preferable in this embodiment that a notch 10 is formed in the upper surface of the lower cover plate 1, and a detection head of the pressure detection member 3 extends into the notch 10.

In order to prevent that lithium cell deformation makes under 1 certain department perk of apron and then reduce the bulging force to pressure measurement spare 3, preferred in this embodiment, still including location slide bar 4, on apron 1 was down installed to the one end of location slide bar 4, the vertical slidable mounting of the other one end of location slide bar 4 was on upper cover plate 2, and then guaranteed the precision that pressure measurement spare 3 detected the battery bulging force.

In the present embodiment, it is preferable that the upper cover plate 2 is provided with a positioning slide hole 20, and the positioning slide hole 20 is matched with the positioning slide rod 4.

In order to further increase the detection of the expansion force of the pressure detection member 3 on the lithium battery, it is preferable in the present embodiment that a plurality of positioning sliding rods 4 are provided, and the plurality of positioning sliding rods 4 are all provided on the lower cover plate 1.

In order to avoid the influence of the tilting of the periphery of the lower cover plate 1 on the detection of the expansion force of the battery by the pressure detection part 3, it is preferable in this embodiment that four positioning sliding rods 4 are provided, and the four positioning sliding rods 4 are respectively arranged at four corners of the lower cover plate 1.

In the present embodiment, the upper cover plate 2 and the lower cover plate 1 are preferably made of aluminum alloy plates, which have a long service life and facilitate the transmission of the expansion force.

In the present embodiment, the pressure detecting member 3 is preferably a pressure sensor, which has high detection accuracy and is easy to install.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a square lithium ion battery module end plate which characterized in that, includes lower apron (1), upper cover plate (2) and pressure measurement spare (3), wherein:

the lower cover plate (1) is arranged on the battery shell and is used for covering the battery shell;

pressure measurement spare (3) are fixed in the lower bottom surface of upper cover plate (2), and the detection head of pressure measurement spare (3) is contradicted with lower apron (1), and upper cover plate (2) are located apron (1) top down, and upper cover plate (2) and down form the deformation space between apron (1), and the conductor wire of pressure measurement spare (3) is located the deformation space.

2. The square lithium ion battery module end plate according to claim 1, wherein the upper surface of the lower cover plate (1) is provided with a notch (10), and the detection head of the pressure detection member (3) extends into the notch (10).

3. The square lithium ion battery module end plate according to claim 1, further comprising a positioning sliding rod (4), wherein one end of the positioning sliding rod (4) is installed on the lower cover plate (1), and the other end of the positioning sliding rod (4) is vertically and slidably installed on the upper cover plate (2).

4. The square lithium ion battery module end plate according to claim 3, characterized in that the upper cover plate (2) is provided with a positioning slide hole (20), and the positioning slide hole (20) is matched with the positioning slide rod (4).

5. The square lithium ion battery module end plate according to claim 4, wherein a plurality of positioning sliding rods (4) are provided, and the plurality of positioning sliding rods (4) are provided on the lower cover plate (1).

6. The square lithium ion battery module end plate according to claim 4, characterized in that there are four positioning sliding rods (4), and four positioning sliding rods (4) are respectively arranged at four corners of the lower cover plate (1).

7. The square lithium ion battery module end plate according to claim 1, wherein the upper cover plate (2) and the lower cover plate (1) are both aluminum alloy plates.

8. The square lithium ion battery module end plate according to claim 1, wherein the pressure detecting member (3) is a pressure sensor.