CN220106696U

CN220106696U - Battery monomer, battery module and battery package

Info

Publication number: CN220106696U
Application number: CN202321713502.XU
Authority: CN
Inventors: 刘海青; 潘文成; 孙锐
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2023-11-28
Anticipated expiration: 2033-06-29

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery monomer, a battery module and a battery pack, wherein the battery monomer comprises a battery shell, an insulating plate and a Mylar film, the insulating plate is covered at an opening of the battery shell, the insulating plate is provided with a skirt edge positioned in the battery shell, the skirt edge is provided with a clamping hole, the Mylar film is provided with a protruding part, the protruding part is matched with the clamping hole in a clamping way, the connection between the Mylar film and the insulating plate can be realized through the matching of the protruding part and the clamping hole, and the battery monomer has the effect of improving the energy density and the product yield of the battery monomer.

Description

Battery monomer, battery module and battery package

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery monomer, a battery module and a battery pack.

Background

When assembling the battery cell, a layer of mylar film is covered on the outer wall of the battery cell, and then the mylar film is connected with the lower plastic in the cover plate component in a hot-melt manner, so that the mylar film is connected with the lower plastic.

However, in the above-mentioned hot-melt connection manner, a sufficient hot-melt space needs to be reserved on the lower plastic, so that the height dimension of the lower plastic is relatively high, and when the battery cell is assembled, the lower plastic with relatively high dimension is filled into the battery shell, which is not beneficial to improving the space utilization rate of the battery shell; in addition, when carrying out the hot melt to Mylar film and lower plastic, high temperature environment makes Mylar film appear melting wire drawing's problem easily, and then when carrying out the welding to apron and the battery case in the apron subassembly, the problem of welding the explosion point appears easily, has improved the free defective rate of battery.

Therefore, it is needed to provide a battery cell, a battery module and a battery pack to solve the above-mentioned problems.

Disclosure of Invention

The first object of the present utility model is to provide a battery cell, in which the connection between the mylar film and the insulating plate can be achieved by the cooperation of the protruding portion and the clamping hole.

To achieve the purpose, the utility model adopts the following technical scheme:

a battery cell comprising:

a battery case;

the insulating plate is covered at the opening of the battery shell and is provided with a skirt edge, the skirt edge is positioned in the battery shell, and the skirt edge is provided with a clamping hole;

the Mylar film is provided with a protruding part, and the protruding part is matched with the clamping hole in a clamping way.

Optionally, the mylar film is further provided with a groove, the groove and the protruding portion are respectively located on two surfaces of the mylar film, and the groove and the protruding portion are arranged oppositely.

Optionally, the protruding portion is an elastic member, and a cross-sectional area of the protruding portion in a natural state is larger than a cross-sectional area of the card hole.

Optionally, the maillard film is further provided with a connecting portion, the protruding portion is connected with the maillard film through the connecting portion, and the connecting portion is configured to penetrate through the clamping hole.

Optionally, the cross-sectional area of the connecting portion is less than or equal to the cross-sectional area of the card hole.

Optionally, the mylar film, the connection portion, and the protrusion are of an integral structure.

Optionally, the number of the clamping holes and the protruding parts is multiple and corresponds to one.

Optionally, the skirt extends along an edge of the insulating plate, and the plurality of clamping holes are uniformly distributed along an extending direction of the skirt.

The second objective of the present utility model is to provide a battery module with high energy density and high product yield.

the battery module comprises a binding band and the battery cells, wherein the number of the battery cells is multiple, and the binding band binds the battery cells into a whole.

The third object of the present utility model is to provide a battery pack with higher energy density and higher product yield.

the battery pack comprises a battery box and the battery module, and the battery module is arranged in the battery box.

The beneficial effects are that:

according to the battery monomer, the insulating plate is arranged at the opening of the battery shell in a covering mode, the skirt edge positioned in the battery shell is arranged on the insulating plate, the clamping holes are formed in the skirt edge, the protruding portions are matched with the clamping holes in a clamping mode, connection between the Mylar film and the insulating plate is achieved, the Mylar film and the insulating plate can be connected through the matching of the protruding portions and the clamping holes, hot melting connection between the Mylar film and the insulating plate is omitted, therefore, hot melting height of a larger size is reserved on the insulating plate is omitted, space utilization in the battery shell is improved, the space of the height can be used for accommodating the battery cores with increased height, battery capacity of the battery monomer is further enlarged, energy density of the battery monomer is improved, hot melting connection between the Mylar film and the insulating plate is omitted, the problem of fusion wire drawing of the Mylar film is avoided, the probability of explosion point problems when the cover plate and the battery shell are welded is reduced, and the effect of improving the yield of the battery monomer is achieved.

The battery module provided by the utility model adopts the battery monomer, so that the battery module not only has higher energy density, but also has higher product yield.

The battery pack provided by the utility model adopts the battery module, has higher energy density and higher product yield.

Drawings

FIG. 1 is a schematic diagram of an explosion structure of a Mylar film and cover plate assembly according to the present embodiment;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a partial enlarged view at B in fig. 1.

In the figure:

110. a skirt edge; 111. a clamping hole; 200. a Mylar film; 210. a protruding portion; 220. a groove; 230. a connection part; 300. and a cover plate.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a battery monomer, and the connection between the Mylar film and the insulating plate can be realized through the cooperation of the protruding part and the clamping hole.

Specifically, as shown in fig. 1 and fig. 2, the battery unit includes a battery case (not shown in the drawings), a cover plate assembly, a mailer film 200 and a battery cell (not shown in the drawings), wherein the cover plate assembly includes a cover plate 300 and an insulating plate, the cover plate 300 and the insulating plate are both covered at an opening of the battery case, the insulating plate covers a side surface of the cover plate 300 facing the battery case, the insulating plate is provided with a skirt 110, the skirt 110 is located in the battery case, a clamping hole 111 is provided on the skirt 110, the mailer film 200 covers an outer wall of the battery cell, the mailer film 200 and the battery cell are both arranged in the battery case, the mailer film 200 is provided with a protruding portion 210, and the protruding portion 210 is in clamping fit with the clamping hole 111.

Based on the design, the insulating board cover is established in the opening part of battery case, be equipped with the shirt rim 110 that is located the battery case on the insulating board, and be equipped with draw-in hole 111 on the shirt rim 110, be equipped with bulge 210 on the mailer film 200, bulge 210 and draw-in hole 111 joint cooperation, when assembling mailer film 200 and insulating board and being connected, pass draw-in hole 111 with bulge 210 on mailer film 200 by one side of shirt rim 110, and fix the opposite side at shirt rim 110, perhaps make bulge 210 card in draw-in hole 111, thereby realized being connected with the insulating board of mailer film 200, it can to be seen that this battery monomer only need set up high size less shirt rim 110 on the insulating board, can realize on the shirt rim 110 that draw-in hole 111 then through bulge 210 and draw-in hole 111 mechanical fit's mode, the hot melt connection of mailer film 200 and insulating board has been saved, consequently, the hot melt height of reserving great size on the insulating board, and the height that needs on the insulating board is reduced as far as possible, and then the battery cell wire drawing space utilization ratio of battery case is improved, and the battery cell wire drawing space utilization ratio is reduced, and the battery cell capacity is improved, the problem of the battery cell is avoided and the battery cell is improved, and the battery cell space utilization is more than the wire-drawing down, and the problem is avoided and the battery cell is more than the battery cell is welded and has the battery cell to be more is more than the battery and has the battery cell and has better and the battery cell and has better the battery cell and to be.

Further, the protruding portion 210 is an elastic member, the cross-sectional area of the protruding portion 210 in the natural state is larger than the cross-sectional area of the clamping hole 111, so that the protruding portion 210 is pressed into the clamping hole 111 on one side of the skirt 110, and after the protruding portion 210 is pressed into the clamping hole 111, the protruding portion 210 is clamped in the clamping hole 111 because the protruding portion 210 has elasticity and the cross-sectional area of the protruding portion 210 in the natural state is larger than the cross-sectional area of the clamping hole 111, so that the protruding portion 210 and the clamping hole 111 are clamped and matched; or, after the protruding portion 210 is pressed into the clamping hole 111, the protruding portion 210 is continuously pressed until the protruding portion 210 passes through the clamping hole 111 to the other side of the skirt 110, at this time, the protruding portion 210 passing through the clamping hole 111 can rebound to a natural state because of elasticity of the protruding portion 210, and because the cross-sectional area of the protruding portion 210 in the natural state is larger than that of the clamping hole 111, the edge of the clamping hole 111 plays a limiting role on the protruding portion 210 at one side of the skirt 110 facing the protruding portion 210, the protruding portion 210 is prevented from passing back to the opposite side of the skirt 110 through the clamping hole 111, the effect of fixing the protruding portion 210 is achieved, and the clamping fit of the protruding portion 210 and the clamping hole 111 is achieved.

Alternatively, as shown in fig. 1 to 3, the mailer 200 is further provided with a connection portion 230, the protruding portion 210 is connected to the mailer 200 through the connection portion 230, the connection portion 230 is configured to be disposed through the card hole 111, that is, after the protruding portion 210 is pressed to completely pass through the card hole 111, the protruding portion 210 rebounds to a natural state, and the connection portion 230 is located in the card hole 111.

Further, the cross-sectional area of the connecting portion 230 is smaller than or equal to the cross-sectional area of the card hole 111, so that the process of passing the protruding portion 210 through the card hole 111 is easier and more labor-saving. Preferably, the cross-sectional area of the connection part 230 is smaller than the cross-sectional area of the card hole 111 so as to press the protrusion 210 through the card hole 111. And, the structure is provided such that the cross-sectional area of the protrusion 210 is greater than the cross-sectional area of the card hole 111, and the cross-sectional area of the card hole 111 is greater than the cross-sectional area of the connection part 230, so that it is ensured that the protrusion 210 after passing through the card hole 111 is not removed from the card hole 111 any more, and the reliability of connection of the mailer film 200 with the insulating plate is improved.

Alternatively, the protruding portion 210, the connecting portion 230, and the clamping hole 111 are all cylindrical to facilitate the production process. In this embodiment, the cross-sectional area of the protruding portion 210 is larger than the cross-sectional area of the clamping hole 111, the cross-sectional area of the clamping hole 111 is larger than the cross-sectional area of the connecting portion 230, and the difference between the cross-sectional areas is determined according to practical application requirements, and the diameter of the protruding portion 210 is 3mm, the diameter of the clamping hole 111 is 2.9mm, and the diameter of the connecting portion 230 is 2.8mm.

Optionally, the length of the connecting portion 230 is equal to the axial length of the clamping hole 111, so that the protruding portion 210 can be just clamped on the side of the skirt 110 facing away from the mylar film 200, which has the effect of preventing the mylar film 200 from being displaced relative to the insulating plate, and improves the connection stability of the mylar film 200 and the insulating plate.

Optionally, as shown in fig. 1 to 3, the mylar film 200 is further provided with a groove 220, on the same piece of mylar film 200, the groove 220 and the protrusion 210 are respectively located on two surfaces of the mylar film 200, that is, the notch of the groove 220 is set towards the direction deviating from the protrusion 210, and the groove 220 is set opposite to the protrusion 210, when the mylar film 200 and the insulating plate are assembled, the bottom of the groove 220 can be pressed to press the protrusion 210 into and pass through the clamping hole 111, so that the pressing force applied to the protrusion 210 is concentrated by the groove 220, and the assembly of the mylar film 200 and the insulating plate can be more labor-saving and rapid.

Alternatively, the mailer 200, the connection portion 230, and the protrusion portion 210 are integrally formed, and the mailer 200 with the connection portion 230 and the protrusion portion 210 can be manufactured by an integral molding process during actual production, which has the effects of simplifying the production process and improving the production efficiency.

It should be noted that, the mylar film 200 in this embodiment is made of materials common in the art, such as polypropylene (PP) or polyethylene terephthalate (PET), and the conventional mylar film 200 has a certain elasticity, so the integral structural design of the mylar film 200, the connection portion 230 and the protrusion portion 210 still can maintain the elastic characteristic of the protrusion portion 210.

Alternatively, as shown in fig. 1 to 3, the number of the card holes 111 and the protruding portions 210 is plural and corresponds one to one, so as to improve the reliability and stability of the connection of the mailer film 200 and the insulating plate.

Further, as shown in fig. 1 to 3, the skirt 110 extends along the edge of the insulating plate, and the plurality of clip holes 111 are uniformly distributed along the extending direction of the skirt 110, so as to improve the uniformity of connection of the mailer film 200 with the insulating plate.

Because the hot melt connection of the mylar film 200 and the insulating plate is omitted, the height of the insulating plate can be reduced, thereby improving the space utilization rate inside the battery case and further improving the energy density of the battery cell. In particular, the height of the skirt may be 3mm to 4mm (less than 5mm to 6mm in the prior art).

In this embodiment, the battery unit is of a square structure, the battery core is of a square structure, four side walls and bottom walls of the battery core are covered with mylar films 200, as shown in fig. 1, four mylar films 200 are shared on the side walls of the battery core, the insulating plate and the cover plate 300 are of square structures, the extending direction of the skirt 110 is the length direction and the width direction of the insulating plate, namely, the skirt 110 is arranged on two long edges and two short edges of the insulating plate, four linear skirt 110 are arranged on the insulating plate, each skirt 110 corresponds to one mylar film 200, a plurality of clamping holes 111 uniformly distributed along the extending direction of the skirt 110 are arranged on each skirt 110, and a plurality of clamping holes 111 on one skirt 110 are purchased to correspond to a plurality of protruding parts 210 on the same mylar film 200 one by one.

It will be appreciated that in other embodiments, the battery cell may also be in a cylindrical structure, the battery cell is in a cylindrical structure, a piece of mylar film 200 is covered on the side wall of the battery cell, at this time, the insulating plate and the cover plate 300 are both in a circular structure, the extending direction of the skirt 110 is the circumference of the insulating plate, a continuous or discontinuous annular skirt 110 is arranged on the insulating plate, the plurality of clamping holes 111 are uniformly distributed along the extending direction of the skirt 110, and the plurality of protruding parts 210 on the mylar film 200 are in one-to-one correspondence with the plurality of clamping holes 111.

The embodiment also provides a battery module, which not only has higher energy density, but also has higher product yield.

Specifically, this battery module includes bandage and foretell battery monomer, and battery monomer's quantity is a plurality ofly, and the bandage is binded a plurality of battery monomers as an organic whole. The battery module adopts the battery monomer, so that the battery module not only has higher energy density, but also has higher product yield.

The embodiment also provides a battery pack which has higher energy density and higher product yield.

Specifically, the battery pack comprises a battery box and the battery module, and the battery module is installed in the battery box. The battery adopts the battery module, so that the battery has higher energy density and higher product yield.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. A battery cell, comprising:

a battery case;

the insulating plate is covered at the opening of the battery shell and is provided with a skirt edge (110), the skirt edge (110) is positioned in the battery shell, and a clamping hole (111) is formed in the skirt edge (110);

the Mylar film (200), mylar film (200) is equipped with protruding portion (210), protruding portion (210) with draw-in hole (111) joint cooperation.

2. The battery cell according to claim 1, wherein the mylar film (200) is further provided with a groove (220), the groove (220) and the protrusion (210) are respectively located on two surfaces of the mylar film (200), and the groove (220) is disposed opposite to the protrusion (210).

3. The battery cell according to claim 1, wherein the protruding portion (210) is an elastic member, and a cross-sectional area of the protruding portion (210) in a natural state is larger than a cross-sectional area of the card hole (111).

4. A battery cell according to any one of claims 1-3, wherein the mylar film (200) is further provided with a connection portion (230), the protruding portion (210) is connected to the mylar film (200) through the connection portion (230), and the connection portion (230) is configured to be inserted into the clamping hole (111).

5. The battery cell according to claim 4, wherein a cross-sectional area of the connecting portion (230) is smaller than or equal to a cross-sectional area of the card hole (111).

6. The battery cell of claim 4, wherein the mylar film (200), the connection portion (230), and the protrusion (210) are of unitary construction.

7. A battery cell according to any one of claims 1-3, wherein the number of the snap holes (111) and the protrusions (210) is plural and corresponds one to one.

8. The battery cell according to claim 7, wherein the skirt (110) extends along an edge of the insulating plate, and the plurality of clip holes (111) are uniformly distributed along an extending direction of the skirt (110).

9. A battery module comprising a strap and a plurality of battery cells according to any one of claims 1-8, wherein the strap binds a plurality of the battery cells together.

10. A battery pack comprising a battery case and the battery module according to claim 9, the battery module being mounted in the battery case.