CN219203309U - Battery structure, battery module and battery pack - Google Patents
Battery structure, battery module and battery pack Download PDFInfo
- Publication number
- CN219203309U CN219203309U CN202223131501.2U CN202223131501U CN219203309U CN 219203309 U CN219203309 U CN 219203309U CN 202223131501 U CN202223131501 U CN 202223131501U CN 219203309 U CN219203309 U CN 219203309U
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- Prior art keywords
- top cover
- battery
- edge
- cover plate
- protective film
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- 230000001681 protective effect Effects 0.000 claims abstract description 55
- 238000003825 pressing Methods 0.000 claims abstract description 42
- 239000003292 glue Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- 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
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- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses a battery structure, a battery module and a battery pack, and relates to the technical field of battery energy, comprising the following steps: the battery shell is of a polygonal structure; the protective film is arranged along the side face of the battery shell in a bonding way, the edge part of the protective film exceeds the battery shell and is folded towards the top cover plate so as to be arranged on the top cover plate in a bonding way, and the edge part forms a superposition part at the corner of the top cover plate; the pressing piece is adhered to the surface of the overlapping part and the top cover plate so as to enable the overlapping part to be in pressing fit with the top cover plate; or the pressing piece is adhered between the overlapped part and the back surface of the edge part so as to enable the overlapped part and the back surface of the edge part to be in a pressed state. According to the battery structure, the pressing piece is arranged at the position, which is easy to tilt, of the edge of the protective film, and the edge of the protective film is specially pressed and fixed by the pressing piece, so that the possibility of tilting of the edge of the protective film is effectively reduced.
Description
Technical Field
The utility model relates to the technical field of battery energy, in particular to a battery structure, a battery module and a battery pack.
Background
With the strong support of the state to new energy, the research and development of secondary batteries with excellent performances are well-developed, and how to ensure the battery quality and the safety of the secondary batteries is an important ring in the research and development process of the secondary batteries. The secondary battery generally includes a plurality of sub-batteries and a case, and in order to better protect the secondary battery, a blue film is generally coated on the surface of the case of the battery to prevent the battery from being in contact with an external charged body.
In order to completely cover the side surfaces of the battery, the edges of the blue film usually exceed the outer shell of the battery, and the exceeding parts of the blue film are then folded and adhered to the top cover plate of the battery. However, for a cell with a polygonal structure, there are a plurality of edge corners of the cell, so that when the blue film wraps two adjacent sides of the cell, the blue film is inevitably overlapped at the corners of the two edges, thereby forming an overlapped portion. However, the corner adhesion area is limited, so that the adhesion force of the overlapping part is difficult to resist the restoring stress of the blue film, the blue film (overlapping part) at the corner is the most frequent position for the tilting phenomenon, and the tilting phenomenon of the blue film can cause the exposure risk of the edge of the battery shell.
Disclosure of Invention
The edge of the protective film at the edge corner of the polygonal battery shell is difficult to be tightly adhered to the top cover plate of the battery in the prior art, so that the phenomenon of tilting occurs. In a first aspect, the present application provides a battery structure comprising: the battery comprises a battery core, a battery shell, a top cover plate, a protective film and a pressing piece; wherein,,
the battery cell is accommodated in the battery shell, an opening is formed in the upper part of the battery shell along the height direction of the battery structure, and the top cover plate is covered on the opening of the battery shell;
the battery shell is of a polygonal structure;
the protective film is arranged along the side face of the battery shell in a bonding mode, the edge part of the protective film exceeds the battery shell and is folded towards the top cover plate so as to be arranged on the surface of the top cover plate in a bonding mode, and the edge part forms a superposition part at the corner of the top cover plate;
the pressing piece is attached to the surface of the overlapping part and the top cover plate so that the overlapping part is in press fit with the top cover plate; or the pressing piece is attached between the overlapping part and the back surface of the edge part, so that the overlapping part and the back surface of the edge part are in a pressed state.
In some embodiments, the pressing piece is further attached to the back surface of the edge portion and the top cover plate, and the pressing piece is in press fit with the back surface of the edge portion so that the edge portion and the top cover plate are in a pressed state.
In some embodiments, the compression member comprises: a gel layer.
In some embodiments, the gel layer is made of UV glue.
In some embodiments, the battery structure further comprises: the top cover patch is attached to the outermost side of the height direction of the battery structure, and a plurality of through holes are formed in the top cover patch.
In some embodiments, the pressing piece is attached to the back surface of one end of the edge portion, and the edge of the top cover patch is adhered to the back surface of the other end of the edge portion of the protective film.
In some embodiments, the edge portion of the protective film is provided with a plurality of open channels arranged at intervals along the edge of the top cover plate on the surface of one end far away from the pressing piece 3;
the top cover patch is adhered to the top cover plate through the opening channel at the edge part.
In a second aspect, the present application provides a battery module, including the battery structure described above.
In a third aspect, the present application provides a battery pack including the above battery module.
Compared with the prior art, the utility model has the advantages that:
according to the battery structure, the pressing piece is arranged at the position, which is easy to tilt, of the edge of the protective film, and the edge of the protective film is specially pressed and fixed by the pressing piece, so that the possibility of tilting of the edge of the protective film is effectively reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a top view of a battery structure according to an embodiment of the present utility model;
FIG. 2 is a schematic view of the portion of FIG. 1;
FIG. 3 is a schematic view of a portion of a battery of the present utility model with a blue film adhered to the top cover plate;
FIG. 4 is a schematic view of a battery structure in an uninstalled state of the press-fit member according to an embodiment of the present utility model;
FIG. 5 is a schematic diagram of a battery structure in a top view without mounting a lamination in accordance with an embodiment of the present utility model;
fig. 6 is a schematic diagram illustrating a structure of a battery structure in a state of mounting a pressing member in a top view according to an embodiment of the present utility model.
In the figure: 1. a top cover plate; 2. a protective film; 21. an edge portion; 211. a superposition section; 212. an open channel; 3. pressing the piece; 31. a gel layer; 4. an explosion-proof valve.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings. Aiming at the problem that the edge of the protective film of the polygonal battery in the prior art is easy to form an overlapping part 211 which is difficult to be tightly adhered to the top cover plate 1 of the battery at the edge corner of the top cover plate 1, the protective film 2 is tilted. As shown in fig. 1 and 2, the present application provides a battery structure, which includes: the battery comprises a battery cell, a battery shell, a top cover plate 1, a protective film 2 and a pressing piece 3; wherein,,
the battery cell is accommodated in the battery shell, an opening is formed in the upper part of the battery shell along the height direction (Z direction in fig. 4) of the battery structure, and the top cover plate 1 is covered on the opening of the battery shell;
the battery shell is of a polygonal structure; the protective film 2 is attached to the side of the battery case, and the edge portion 21 of the protective film 2 extends beyond the battery case and is folded towards the top cover plate 1 so as to be attached to the surface of the top cover plate 1, and the edge portion 21 forms an overlapping portion 211 at the corner of the top cover plate 1;
the lamination member 3 in the battery structure of the present application includes two states: the pressing piece 3 is attached to the surface of the overlapping portion 211 and the top cover plate 1, so that the overlapping portion 211 is in pressing fit with the top cover plate 1; or alternatively, the first and second heat exchangers may be,
the pressing member 3 is attached between the overlapping portion 211 and the back surface of the edge portion 21, so that the overlapping portion 211 and the back surface of the edge portion 21 are in a pressed state.
It should be noted that, in the above battery structure, as shown in fig. 1, the battery case has a side surface and a bottom surface, the bottom surface of the battery case is opposite to the top cover 1, and the side surface of the battery case is adjacent to the top cover 1 and faces different. Further, the protective film 2 includes an inner face and a rear face, the inner face of which is generally coated with an adhesive, whereby the protective film 2 is adhered to the battery case. However, since the protective film 2 is attached only around the side of the battery case, the edge portion 21 is a small section of the edge of the protective film 2 beyond the top cover 1, that is, the battery case has several sides, and several insulating portions 21 are formed. Taking fig. 1 as an example, the battery case has 4 sides, and the battery shown in fig. 1 has 4 insulating parts 21.
In addition, since the battery case has a polygonal structure. When the protective film 2 wraps the 4 sides of the battery case and the edge portions 21 of the protective film 2 located on the two adjacent sides are attached to the top cover plate 1, overlapping is inevitably generated at the corners of the two edges, and the overlapping portions are overlapping portions 211 of the protective film 2. Since the protective film 2 is adhered to the surface of the battery case mainly by its side face, and the adhesion area at the corner of the top cover plate 1 is limited, the adhesion force at the overlapping portion is hard to resist the restoring stress of the blue film. The overlapping portion 211 is the most frequent position where the tilting phenomenon occurs.
Therefore, the present application adopts the overlapping portion 211 reversely folded back to the edge portion 21 on either side. Bonding the back of the overlapped part 211 with the back of the edge part 21 in the non-corner area through the pressing piece 3 to provide larger bonding force to resist the corner tilting trend; or the pressing piece 3 is partially assembled on the surface of the top cover plate 1, and part of the pressing piece is attached to the back of the overlapping part 211 at the joint of the edge part 21 and the top cover plate 1, so that the overlapping part 211 is pressed on the top cover plate 1, and the phenomenon of corner lifting is reduced.
In some embodiments, on the basis of the above embodiments, the pressing member 3 is further attached to the back surface of the edge portion 21 and the top cover 1, and the pressing member 3 is in press fit with the back surface of the edge portion 21 so as to make the edge portion 21 and the top cover 1 in a pressed state.
It can be appreciated that the pressing member 3 is attached to the edge portion 21 and the top cover 1, so as to further reduce occurrence of warpage.
It should be noted that, in some related art, the edge portion 21 is processed by cutting, but in the cutting process, firstly, the cutting accuracy is difficult to grasp, and the protective film 2 with good wrapping is easily damaged. It is apparent that even though the inner surface of the small-section edge portion 21 is coated with adhesive, the adhesion area of the edge portion 21 on the top cover plate 1 is much smaller than that of the battery case side. Therefore, when the edge portion 21 is folded and attached to the top cover 1, the adhesion force thereof to the top cover 1 is difficult to resist the restoring stress of the protective film 2. Therefore, the edge portion 21 is also tilted. In the present application, the pressing member 3 is used for this phenomenon to press the edge portion 21 of the protective film 2 against the top cover plate 1. In this way, even if the adhesive on the inner surface of the edge portion 21 fails or the adhesive force is insufficient, the tilting phenomenon does not occur.
In some embodiments, as shown in fig. 2, the press-fit member 3 includes: a gel layer 31.
The gel layer 31 is provided on one side for adhering to the protective film 2, and on the other side for adhering to the top cover plate 1 across the edge portion 21 of the protective film 2.
It will be appreciated that a gel layer 31 is used in the present application to compress the edge portion 21 of the protective film 2 against the top cover plate 1 and/or a gel layer 31 is used to bond the overlapping portion 211 to the back of the edge portion 21 or a gel layer 31 is used to bond the overlapping portion 211 to the top cover plate 1. The gel layer 31 is convenient to use, after the protective film 2 wraps the battery shell, the edge part 21 is adhered to the top cover plate 1, the gel layer 31 is coated on the back surface of the edge part 21 and the joint part with the top cover plate 1 and/or the gel layer 31 is coated between the superposition part 211 and the back surface of the edge part 21, or the gel layer 31 is coated on the surface of the superposition part 211 and the surface of the top cover plate 1. The mounting of the protective film 2 is completed after the gel layer 31 is solidified. It should be noted that, the bonding area between the gel layer 31 and the top cover 1 can be increased or decreased according to the bonding requirement of the edge portion 21 of the protective film 2; similarly, the bonding area between the gel layer 31 and the overlapping portion 211 can be increased or decreased according to the actual requirement.
In some embodiments, the gel layer 31 of the battery structure of the present application is made of UV glue, since the battery case and top cover plate 1 are generally made of aluminum materials. The UV glue does not contain materials that react easily with the aluminum shell.
In some embodiments, the battery structure further comprises: the top cap paster, the top cap paster pastes and locates on the surface of lamina tecti 1, just be equipped with a plurality of through-holes on the top cap paster. The through hole is used for exposing the explosion-proof valve 4 or the positive and negative pole post and other parts on the top cover plate 1.
The height direction of the battery structure in the present application is the Z direction illustrated in fig. 4.
In some specific embodiments, the pressing member 3 is attached to the back surface of one end of the edge portion 21, and the edge of the top cover patch is fixed to the back surface of the other end of the edge portion 21 of the protective film 2 by using an adhesive manner.
In the present application, "the other end of the edge portion 21" in which the edge of the top cover patch and the back surface of the other end of the edge portion 21 of the protective film 2 are fixed by an adhesive means "means an end portion of the edge portion 21 near the side surface of the battery case corresponding to the edge portion 21.
It should be noted that, when the top cover sheet 1 is provided with the top cover sheet, the applicant found that the edge portion 21 of the protective film 2 is also provided on the top cover sheet 1. The cover patch is at least partially adhered to the protective film 2. Once the edge portion 21 or the overlapping portion 211 is tilted, the cover patch is driven to tilt together, so that the cover patch fails. Thus, the present application provides an embodiment in which the edge portion 21 of the protective film 2 is provided with an open channel 212 on a surface of an end remote from the press-fit 3 along the edge of the top cover plate 1, the open channel 212 extending along the edge of the top cover plate 1. The cover patch is adhered to the cover plate 1 through the open channel 212 at the edge portion 21. The number of open channels 212 and the particular shape may be selected according to actual needs.
It will be appreciated that the press-fit 3 is press-fitted to the back surface of one end of the edge portion 21 and to the top cover plate 1. The top cover patch is arranged on the outermost side of the battery structure in the height direction, and the edge of the top cover patch is adhered to the back surface of the other end of the edge part 21 by crossing the pressing piece 3 so as to press the edge part 21 and the pressing piece 3 to the top cover plate 1.
Further, as shown in fig. 5 and 6, a plurality of open channels 212 are provided at the edge portion 21, and the plurality of open channels 212 are provided at intervals on the edge portion 21 so that the portion of the top cover patch where the edge of the top cover patch is adhered to the edge portion 21 can be directly adhered to the top cover plate 1 through the open channels 212. In this way, even if the adhesion force of the edge portion 21 of the protective film 2 is insufficient, the top cover patch can apply a pressing force thereto instead of tilting together with the protective film 2, and thus the risk of tilting the protective film 2 is further reduced.
The application also provides a battery module, it includes: such as the battery structure described above.
The present application also provides a battery pack, which includes: such as the battery module described above.
In summary, in the battery structure of the present utility model, the pressing member is disposed at the position where the edge of the protective film is easy to tilt, and the edge of the protective film 2 is specially pressed and fixed by using the pressing member, so that the possibility of tilting the edge of the protective film 2 is effectively reduced. Further, the applicant found that the edge of the top cover patch of the battery structure had to be attached to the edge portion 21 of the cover sheet 1 of the protective film 2, and that the top cover patch also failed as soon as the edge portion 21 was tilted. Thus, by providing an open channel in the protective film 2, the top cover patch edge is at least partially bonded to the battery top cover plate 1. In this way, even if the edge portion 21 fails, the cover patch does not fail along with the edge portion 21 tilting, and the cover patch applies a pressing force to the edge portion 21 to prevent the tilting phenomenon from occurring.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
It should be noted that in this application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223131501.2U CN219203309U (en) | 2022-11-24 | 2022-11-24 | Battery structure, battery module and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223131501.2U CN219203309U (en) | 2022-11-24 | 2022-11-24 | Battery structure, battery module and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219203309U true CN219203309U (en) | 2023-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223131501.2U Active CN219203309U (en) | 2022-11-24 | 2022-11-24 | Battery structure, battery module and battery pack |
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| Country | Link |
|---|---|
| CN (1) | CN219203309U (en) |
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- 2022-11-24 CN CN202223131501.2U patent/CN219203309U/en active Active
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