CN211295209U - Battery cell sealing device and battery module - Google Patents

Abstract

The utility model relates to a battery cell sealing device and battery module, this battery cell sealing device includes: the sealing main body is used for sealing and isolating the battery cell so as to prevent impurities from entering the insulating layer coated on the surface of the battery cell; the sealing body is provided with a through hole. This disclose add electric core sealing device in battery module, electric core sealing device has effectively avoided two parts insulating film to connect the contact of steam in being in battery module, prevents that two parts insulating film junction capillary phenomenon from taking place, improves the waterproof performance of electric core.

Description

Battery cell sealing device and battery module

Technical Field

The utility model relates to a power battery makes the field, specifically relates to a battery cell sealing device and battery module.

Background

New energy automobile power battery contains a plurality of battery module usually, and includes a plurality of electric cores in the battery module, and electric core need just can come into use after passing through the insulating film parcel. The existing battery core wrapping scheme usually adopts two parts of insulating layers for wrapping, and the method is easy to generate tiny gaps at the joint of the two parts of insulating films, and when water vapor exists, the phenomenon of capillary is easy to occur, so that the waterproof performance of the battery core is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a battery core sealing device and battery module, this battery core sealing device can effective impurity, especially steam diffusion to insulating film junction, prevents that capillary phenomenon from taking place, improves the waterproof performance of electric core.

In order to achieve the above object, a first aspect of the present disclosure provides a cell sealing device, including:

the sealing main body is used for sealing and isolating the battery cell so as to prevent impurities from entering the insulating layer coated on the surface of the battery cell;

the sealing body is provided with a through hole.

Optionally, the shape of the through hole is the same as the cross-sectional shape of the battery cell.

Optionally, the area of the through hole is slightly smaller than the cross-sectional area of the battery cell.

Optionally, the sealing body is made of an elastic insulating material.

Optionally, the impurity is water vapor.

The second aspect of the present disclosure also provides a battery module, including: the battery cell sealing device comprises a plurality of battery cells, wherein the battery cells are provided with the battery cell sealing device disclosed by the first aspect of the disclosure, and the battery cells are sleeved with the battery cell sealing device.

Optionally, the insulating layer includes a first insulating portion and a second insulating portion connected to each other, and the cell sealing device is disposed near a connection point of the first insulating portion and the second insulating portion.

Optionally, the cell sealing device is disposed at a position 1mm to 40mm away from a connection position of the first insulating portion and the second insulating portion.

Optionally, a plurality of the cell sealing devices are connected in a sealing manner.

Optionally, the battery cell is a square battery cell or a cylindrical battery cell.

Through above-mentioned technical scheme, add electric core sealing device in the battery module, electric core sealing device has effectively avoided the contact of two parts insulating film connection impurity, especially steam in being in the battery module, prevents that two parts insulating film junction capillary phenomenon from taking place, improves the waterproof performance of electric core.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic diagram of a first embodiment of a cell module cell sealing device.

Fig. 2 is a schematic diagram of a second embodiment of a cell module cell sealing device.

Fig. 3 is a schematic structural diagram of a cell module cell sealing device and a cell combination.

Fig. 4 is a schematic structural diagram of a cell module cell sealing device combined with a cell.

Fig. 5 is a schematic structural diagram of a cell module cell spacer.

Description of the reference numerals

1 sealing the body 2 through hole

3 electric core 4 first insulating part

5 second insulation part 6 cell spacer

7 locating slot

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, the use of directional terms such as "upper, lower, left, right" generally means "above", "below", "left", "right" based on a particular component referred to in the drawings, unless otherwise specified. "inner and outer" refer to "inner" and "outer" based on the particular components referred to in the drawings. "distal and proximal" refer to the distance from a particular element in the drawings.

As shown in fig. 1 and fig. 2, a first aspect of the present disclosure provides a cell sealing device, which includes a sealing main body 1, where a through hole 2 is provided on the sealing main body 1. The shape of through-hole 2 is the same with the cross sectional shape of electric core 3, and slightly less than the area of 3 cross sections of electric core, because electric core sealing device cover is established on electric core 3, the shape of through-hole 2 on the sealed main part 1 needs to keep unanimous with the cross section of electric core 3, the area of through-hole 2 is slightly littleer then can increase the frictional force between electric core sealing device and the electric core 3 with the cross sectional area of electric core 3, prevent that electric core sealing device from removing on electric core 3, simultaneously can also realize the sealing connection of through-hole 2 and electric core 3, prevent that steam from diffusing to the junction of electric core insulating film between sealed main part 1 and electric.

Sealed main part 1 is made by elastic insulation material, ensures that sealed main part 1 has certain deformability, can realize the extrusion sealing to electric core 1 on the one hand, and on the other hand prevents that the impact force from damaging sealed main part 1 when the battery module receives the impact.

The second aspect of the present disclosure also provides a battery module, including: a plurality of electric cores 3, the cover is equipped with the electric core sealing device that this disclosure first aspect provided on electric core 3. The 3 outsides of electric core are provided with the insulating layer, and the insulating layer includes first insulating part 4 and second insulating part 5, and at the in-process of battery module work, battery module bottom can produce influence electric core insulating nature impurity such as steam, and inside steam can be to diffusion all around, and capillary phenomenon can appear in the slit department that the junction of first insulating part 4 and second insulating part 5 formed and get into the inside electric core insulating nature that leads to of insulating film and reduce. The battery cell sealing device is arranged near the joint of the first insulating part 4 and the second insulating part 5, and can prevent water vapor from diffusing to the joint of the battery cell insulating films to avoid impurities inside the battery module from entering the insulating layer coated on the surface of the battery cell 3. As a preferred embodiment of the present invention, the cell sealing device is disposed at a position 1mm to 40mm away from the junction between the first insulating portion 4 and the second insulating portion 5.

The utility model provides an electricity core sealing device can be arranged in square electric core module or cylinder electricity core module, will illustrate the design of electricity core sealing device in the square electric core module below: a cell spacer or cell isolation device 6 is generally provided between the square cell module cell and the cell.

When the cell spacers are used in the battery module, as shown in fig. 3-5, the cell spacers 6 are generally frame structures, two adjacent cell spacers 6 form a space for accommodating the cell 3, at this time, the side surface of the cell 3 is not completely separated from the side surface of the cell 3, and a mode of sealing a plurality of cells 3 by using one cell sealing device and/or sealing one cell 3 by using one cell sealing device may be used. The battery core separator 6 is provided with a positioning groove 7 for limiting the movement of the battery core sealing device along the height direction of the battery core 3. Because 3 sides of electric core and 3 sides of electric core do not separate completely, need adjacent electric core sealing device to contradict each other in order to keep apart the steam that battery module bottom produced completely, so need the highly uniform at adjacent electric core sealing device place, can realize that adjacent electric core sealing device contradicts each other, ensure the isolation effect of electric core separator. For the condition that one battery cell sealing device seals a plurality of battery cells 3, a plurality of through holes 2 which are slightly smaller than the area of the cross section of the battery cells and have the same shape as the cross section of the battery cells are required to be formed in the battery cell sealing device, and the positions of the through holes 2 are matched with the positions of the battery cells 3 formed after the battery cells are assembled by the battery cells 3 and the battery cell isolating pieces. In addition, to the sealed condition of a plurality of electric cores of a battery sealing device, can select to use a battery module and only contain a battery sealing device or two kinds of schemes of a plurality of battery sealing devices, when adopting a plurality of sealing devices, adjacent sealing device need conflict sealedly, and the principle is unanimous when sealed an electric core with a battery sealing device, does not do too much description here.

When using electric core spacer in the battery module, electric core spacer is the slice structure usually, can separate 3 sides of electric core and 3 sides of electric core completely, at this moment, can only adopt 3 design schemes that correspond electric core sealing device of an electric core. Specifically, 3 covers of every electric core are established an electric core sealing device, and electric core sealing device is inconsistent with adjacent electric core insulating piece, because electric core sealing device has elasticity, can realize with the sealed of electric core spacing piece to reach the effect of keeping apart steam. In the module that uses electric core spacing block, the height at adjacent electric core sealing device place can be inconsistent, as long as realize electric core sealing device and electric core spacing block sealed can.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure. It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (10)

1. A cell sealing device, comprising:

the sealing main body is used for sealing and isolating the battery cell so as to prevent impurities from entering the insulating layer coated on the surface of the battery cell;

the sealing body is provided with a through hole.

2. The cell sealing device of claim 1, wherein the through-hole has a shape that is the same as a cross-sectional shape of the cell.

3. The cell sealing device of claim 1, wherein the area of the through-hole is slightly smaller than the cross-sectional area of the cell.

4. The cell sealing device according to claim 1, characterized in that the sealing body is made of an elastic insulating material.

5. The cell sealing device according to claim 1, wherein the contaminant is moisture.

6. A battery module, comprising: the battery cell sealing device comprises a plurality of battery cells, wherein the battery cell sealing device of any one of claims 1-5 is arranged on each battery cell, and the battery cell sealing device is sleeved on the battery cells.

7. The battery module of claim 6, wherein the insulating layer comprises a first insulating portion and a second insulating portion that are connected, and the cell sealing device is disposed near a connection of the first insulating portion and the second insulating portion.

8. The battery module according to claim 7, wherein the cell sealing device is disposed at a distance of 1mm to 40mm from a junction of the first insulating portion and the second insulating portion.

9. The battery module of claim 6, wherein a plurality of the cell sealing devices are hermetically connected with one another.

10. The battery module of claim 6, wherein the cells are square cells or cylindrical cells.

Images