CN220021378U - Battery cell assembly, battery box and battery pack - Google Patents
Battery cell assembly, battery box and battery pack Download PDFInfo
- Publication number
- CN220021378U CN220021378U CN202320641804.4U CN202320641804U CN220021378U CN 220021378 U CN220021378 U CN 220021378U CN 202320641804 U CN202320641804 U CN 202320641804U CN 220021378 U CN220021378 U CN 220021378U
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- China
- Prior art keywords
- battery
- area
- glue
- cell assembly
- assembly according
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Links
- 239000003292 glue Substances 0.000 claims abstract description 65
- 239000000178 monomer Substances 0.000 claims description 6
- 229920000098 polyolefin Polymers 0.000 claims description 5
- 239000004831 Hot glue Substances 0.000 claims description 4
- 239000010410 layer Substances 0.000 claims description 3
- 238000010073 coating (rubber) Methods 0.000 claims 2
- 238000004026 adhesive bonding Methods 0.000 abstract description 28
- 230000000694 effects Effects 0.000 abstract description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052744 lithium Inorganic materials 0.000 abstract description 3
- 210000004027 cell Anatomy 0.000 description 67
- 238000003892 spreading Methods 0.000 description 33
- 238000000034 method Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model relates to the technical field of lithium batteries, in particular to a battery cell assembly, a battery box body and a battery pack, wherein the battery cell assembly comprises at least two single battery cells, and further comprises a gluing area and an empty area, wherein the gluing area is positioned between two adjacent single battery cells, the gluing area is used for bonding the two adjacent single battery cells, and the empty area is used for reserving an expansion space for the single battery cells. Cementing between two adjacent single cells through a gluing area, and forming a core-coated surface without glue paper after core combination to realize the glue-free paper of the cells; furthermore, the gluing area does not completely cover the large surface of the single battery cell, and then an empty area is reserved between two adjacent single battery cells, so that an expansion space of the single battery cell can be reserved, the technical problem of super-thick battery after capacity division is solved, and the technical effect of improving the performance of the battery pack is achieved.
Description
Technical Field
The utility model relates to the technical field of lithium batteries, in particular to a battery core assembly, a battery box body and a battery pack.
Background
With the wide application of high-capacity lithium batteries in the fields of power automobiles, energy storage and the like, the structure and the assembly mode of the battery are getting more and more important. The traditional battery is designed into a single-cell structure, is difficult to simultaneously accept high voltage and high current, and because the thickness is large, the wettability of the pole piece and electrolyte is poor, the internal resistance is inconsistent, and the premature degradation of the battery is easy to cause.
In the existing process, two or more single cells are required to be combined in the production process of the battery with the double-cell structure or the multi-cell structure, as shown in fig. 1, in the existing core combining process, the two or more single cells 1 are bundled by using the adhesive paper 2, but the surface adhesive paper of the core package formed by the core combining process is more, the appearance of the core package is affected, the single cells 1 are tightly adhered without gaps, and in the capacity division process, the single cells 1 are easy to cause the whole super-thick battery after being expanded, so that the performance of the battery is affected.
Disclosure of Invention
The utility model aims at: aiming at the problems that the surface gummed paper of a core coating formed after a core combining process is more and the battery is easy to be super thick after capacity division in the prior art, the battery core assembly, the battery box body and the battery pack are provided.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the cell assembly comprises at least two single cells, and further comprises a gluing area and an empty area, wherein the gluing area and the empty area are positioned between two adjacent single cells, the gluing area is used for bonding the two adjacent single cells, and the empty area is used for reserving expansion space for the single cells.
The two adjacent single cells are glued through the gluing area, and the glue-free paper is formed on the surface of the core package formed after core combination, so that the glue-free paper of the cells is realized; furthermore, the gluing area does not completely cover the large surface of the single battery cell, and then an empty area is reserved between two adjacent single battery cells, so that an expansion space of the single battery cell can be reserved, the technical problem of super-thick battery after capacity division is solved, and the technical effect of improving the performance of the battery pack is achieved.
As a preferable scheme of the utility model, the distance between the outer edge of the gluing area and the edge of the single battery cell is l,
4mm≤l≤6mm
by limiting the distance between the outer edge of the gluing area and the edge of the single cell, the glue can be prevented from overflowing from the edge of the cell due to extrusion during core closing, and the gluing effect is ensured; and can make the rubberizing area as close as possible to monomer electric core edge, reserve sufficient expansion space.
As a preferable scheme of the utility model, the gluing area is of a rectangular frame structure or a round frame structure, and the empty area is positioned in a space surrounded by the gluing area. The gluing area is designed into a rectangular frame structure or a round frame structure, so that a gluing track is conveniently designed, the gluing efficiency is improved, and the core closing speed is accelerated.
As a preferable scheme of the utility model, the gluing area comprises a plurality of glue spreading strips, and the empty area is arranged between adjacent glue spreading strips.
As the preferable scheme of the utility model, the glue spreading strips are arranged in parallel, so that the glue spreading track is convenient to design, the glue spreading efficiency is improved, and the core closing speed is increased.
As a preferable scheme of the utility model, the distance d between the adjacent glue spreading strips is more than or equal to 0.8mm, and the reservation of enough expansion space can be ensured by limiting the distance between the adjacent glue spreading strips.
As a preferred embodiment of the present utility model, the thickness of the glue spreading area is 0.8mm-1.2mm. And the thickness of the gluing area is limited, so that a sufficient expansion space is ensured between adjacent single battery cells.
As a preferable scheme of the utility model, the gluing area is a polyolefin hot melt adhesive layer.
The utility model also discloses a battery box body, which comprises the battery core assembly.
The utility model also discloses a battery pack, which comprises the box body.
In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:
1. the two adjacent single cells are glued through the gluing area, and the glue-free paper is formed on the surface of the core package formed after core combination, so that the glue-free paper of the cells is realized; furthermore, the gluing area does not completely cover the large surface of the single battery cell, and then an empty area is reserved between two adjacent single battery cells, so that an expansion space of the single battery cell can be reserved, the technical problem of super-thick battery after capacity division is solved, and the technical effect of improving the performance of the battery pack is achieved.
2. The utility model provides technical support for a battery without expansion force (namely, the expansion generated by the single battery cell is digested in the inner space of the battery and is not reflected in the thickness of the battery).
3. The utility model has simple structure and strong operability.
Drawings
Fig. 1 is a schematic diagram of a prior art dual cell structure.
Fig. 2 is a schematic structural diagram of a cell assembly according to the present utility model.
Fig. 3 is a schematic view of the structure of the glue application area described in example 1.
Fig. 4 is a schematic view of the structure of the glue application area described in example 2.
The marks in the figure: 1-a single cell; 2-gummed paper; 3-gluing area; 31-coating adhesive tape; 4 empty space.
Detailed Description
In the following description, various embodiments of the present disclosure will be described with reference to the drawings. As required, detailed embodiments of the present disclosure are discussed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the embodiments of the disclosure that may be embodied in various and alternative forms. The figures are not necessarily to scale and some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present disclosure.
The particulars shown herein are by way of example and for purposes of illustrative discussion of the embodiments of the present disclosure only and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the present disclosure. In this regard, no attempt is made to show structural details of the present disclosure in more detail than is necessary for a fundamental understanding of the present disclosure, the description taken with the drawings making apparent to those skilled in the art how the forms of the present disclosure may be embodied in practice.
Example 1
A cell assembly, as shown in fig. 2, comprises at least two single cells 1, and further comprises a glue spreading area 3 and an empty area 4, wherein the glue spreading area 3 and the empty area 4 are positioned between the large faces (namely larger faces in the single cells) of two adjacent single cells 1, the glue spreading area 3 is used for bonding the two adjacent single cells 1, the empty area 4 is positioned in any area except the glue spreading area 3 between the large faces of two adjacent single cells 1, and the empty area 4 is used for reserving space for expansion of the single cells 1.
The two adjacent single battery cores 1 are glued through the gluing area 3, and the surface of a core package formed after core combination is free of glue paper, so that the battery cores are free of glue paper; further, the glue spreading area 3 does not completely cover the large surface of the single battery cell 1, and then an empty area 4 is reserved between two adjacent single battery cells 1, so that an expansion space of the single battery cell 1 can be reserved, the technical problem of super-thick battery after capacity division is solved, and the technical effect of improving the performance of a battery pack is achieved; and by providing said empty areas 4 it is possible to provide technical support for a cell without expansion forces (i.e. the expansion created by the individual cells is digested in the inner space of the cell, not reflected in the thickness of the cell).
In particular, the glue area 3 has a certain thickness to ensure that the empty area 4 has enough space to accommodate the expansion part of the single cell 1, and preferably, the thickness of the glue area 3 is 0.8mm-1.2mm.
Further, the glue spreading area 3 is a frame structure, and may be a rectangular frame structure or a circular frame structure, so as to design a glue spreading track, improve glue spreading efficiency, and accelerate core closing speed. Of course, as an alternative, the glue application area 3 may be of other closed frame construction, such as a design with wavy edges; such as a triangular frame structure or other polygonal frame structure.
Preferably, as shown in fig. 3, the glue spreading area 3 is a rectangular frame structure, the empty area 4 is located in a space enclosed by the rectangular frame structure, a distance between an outer edge of the glue spreading area 3 and an edge of the single cell 1 is l, and a value range of l is: and the distance from the outer edge of the gluing area 3 to the edge of the single cell 1 is limited by the fact that l is not less than 4mm and not more than 6mm, so that colloid can be prevented from overflowing from the edge of the cell due to extrusion during core closing, the gluing effect is ensured, the gluing area can be as close to the edge of the single cell as possible, and enough expansion space is reserved.
Preferably, the glue spreading area 3 is a polyolefin hot melt glue layer.
Example 2
The difference between this embodiment and embodiment 1 is that in this embodiment, the glue spreading area 3 includes a plurality of glue spreading strips 31, as shown in fig. 4, the glue spreading area 3 includes a plurality of glue spreading strips 31 that are arranged in parallel with each other, the empty area 4 is disposed between two adjacent glue spreading strips 31, the empty area 4 is used as the expansion space of the single cell 1, preferably, the distance between two adjacent glue spreading strips 31 is d, the value range is d is greater than or equal to 0.8mm, and by defining the distance between the glue spreading strips 31, it is ensured that the single cell 1 has sufficient expansion space. In particular, the glue spreading strip 31 may be disposed parallel to the short sides of the unit cells 1, or may be disposed parallel to the long sides of the unit cells 1. Of course, as an alternative, the glue strip 31 may be a plurality of wave-shaped lines arranged parallel or non-parallel to each other; the glue strips 31 may also be arranged in a cross manner, for example in an orthogonal manner, and a plurality of rectangular areas surrounded by the glue strips 31 may be used as the empty areas 4.
Similarly, the distance between the outer edge of the glue spreading area 3 and the edge of the single cell 1 is also l, and the value range is as follows: and l is more than or equal to 4mm and less than or equal to 6mm, so that the glue in the glue coating area 3 overflows from the edge of the battery cell due to extrusion in the process of combining the battery cells, and waste is avoided.
It will be appreciated that the empty region 4 in this embodiment and embodiment 1 is located in any region between the large faces of two adjacent single cells 1 except the glue spreading region 3, and may be located between two adjacent glue spreading strips 31, or between the glue spreading strips 31 and the edges of the single cells 1, or in the space surrounded by the glue spreading region 3, or outside the space surrounded by the glue spreading region 3, etc., and the utility model does not limit and require the specific shape and position of the empty region, as long as the space can be reserved for the expansion of the single cells 1
Example 3
The assembly process of the battery cell component comprises the following steps:
s1, an operator places the single battery cell 1 to be dispensed on a dispensing platform for positioning.
S2, setting the initial position of the glue head, the glue dispensing track and the running speed of the glue dispensing head through a glue dispensing control module of the glue dispensing machine.
S3: and clicking a start button, and enabling the polyolefin hot melt adhesive to reach a dispensing head through a dispensing pipeline and uniformly coating the polyolefin hot melt adhesive on the surface of the to-be-dispensed monomer battery cell 1 through the dispensing head. After dispensing is completed, the dispensing head returns to the initial position.
And S4, after dispensing, another single battery cell 1 is placed on the single battery cell 1 with the glue applied, and the self gravity of the single battery cell 1 without glue applied is utilized to finish bonding without pressing, so that core closing is finished.
If the cell needs to be continuously bonded, repeating the steps.
Example 4
The battery box body comprises the battery cell assembly, at least one group of the battery cell assembly is assembled in the battery box body, and the empty area 4 in the battery cell assembly reserves space for expansion of the battery cell, so that the super-thick battery after capacity division can be avoided, the battery performance is improved, and the rejection rate of the battery box body is reduced.
Example 5
The battery pack comprises the battery box body, and the battery box body is assembled with a plurality of battery box bodies, so that the rejection rate of the battery pack can be reduced due to the fact that the rejection rate of the battery box bodies is low.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The utility model provides a battery cell subassembly, includes two at least monomer electric core (1), its characterized in that still includes and is located adjacent two rubber coating district (3) and empty space (4) between monomer electric core (1), rubber coating district (3) are used for bonding adjacent two monomer electric core (1), empty space (4) are used for the expansion space is reserved to monomer electric core (1).
2. A cell assembly according to claim 1, wherein the distance between the outer edge of the glue area (3) and the edge of the individual cells (1) is l,
4mm≤l≤6mm。
3. a cell assembly according to claim 1, wherein the glue area (3) is a rectangular or circular frame structure, and the empty area (4) is located in a space surrounded by the glue area (3).
4. A cell assembly according to claim 1, wherein the glue application area (3) comprises a plurality of glue application strips (31), and the empty areas (4) are arranged between two adjacent glue application strips (31).
5. A cell assembly according to claim 4, wherein the glue strips (31) are arranged in parallel.
6. A cell assembly according to claim 4, wherein the distance d between adjacent glue strips (31) is not less than 0.8mm.
7. A cell assembly according to claim 1, characterized in that the glue area (3) has a thickness of 0.8mm-1.2mm.
8. A cell assembly according to claim 1, wherein the glue area (3) is a polyolefin-based hot melt adhesive layer.
9. A battery compartment comprising a cell assembly according to any one of claims 1-8.
10. A battery pack comprising a case according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320641804.4U CN220021378U (en) | 2023-03-28 | 2023-03-28 | Battery cell assembly, battery box and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320641804.4U CN220021378U (en) | 2023-03-28 | 2023-03-28 | Battery cell assembly, battery box and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220021378U true CN220021378U (en) | 2023-11-14 |
Family
ID=88678207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320641804.4U Active CN220021378U (en) | 2023-03-28 | 2023-03-28 | Battery cell assembly, battery box and battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220021378U (en) |
-
2023
- 2023-03-28 CN CN202320641804.4U patent/CN220021378U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |