CN210897342U - Laminate polymer battery and battery module - Google Patents
Laminate polymer battery and battery module Download PDFInfo
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- CN210897342U CN210897342U CN201922115543.9U CN201922115543U CN210897342U CN 210897342 U CN210897342 U CN 210897342U CN 201922115543 U CN201922115543 U CN 201922115543U CN 210897342 U CN210897342 U CN 210897342U
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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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Abstract
The utility model provides a laminate polymer battery and battery module. This laminate polymer battery includes: the battery pack comprises a first shell and a second shell which are oppositely arranged, wherein a first protective film is arranged on the surface of the first shell facing one side of the second shell, a second protective film is arranged on the surface of the second shell facing one side of the first shell, and a battery cell accommodating space is defined between the first shell and the second shell; the battery cell is arranged in the battery cell accommodating space. The utility model discloses a laminate polymer battery bulk strength is higher, and anti extrusion, anti collision and anti puncture performance are better, and life and safety in utilization are higher.
Description
Technical Field
The utility model belongs to the technical field of the battery and specifically relates to a laminate polymer battery and battery module are related to.
Background
At present, the soft package battery has the advantages of good safety performance, light weight, large battery capacity, small internal resistance, long cycle life, flexible design, environmental friendliness and the like, and is widely applied to equipment such as cameras, mobile phones, notebook computers, electric vehicles and the like. Because laminate polymer battery's packaging material (usually being the plastic-aluminum membrane) texture is softer, consequently, laminate polymer battery is easy because of the extrusion warp in production and use to it is impaired to collide easily, thereby leads to laminate polymer battery to lose efficacy fast, seriously influences laminate polymer battery's life-span and safety in utilization. Therefore, the strength, the crush resistance, the impact resistance, and the like of the current pouch battery are still to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a laminate polymer battery, this laminate polymer battery's bulk strength is higher, and anti extrusion, anti collision and anti puncture performance are better, and life and safety in utilization are higher.
In an aspect of the utility model, the utility model provides a laminate polymer battery, according to the utility model discloses an embodiment, this laminate polymer battery includes: the battery pack comprises a first shell and a second shell which are oppositely arranged, wherein a first protective film is arranged on the surface of the first shell facing one side of the second shell, a second protective film is arranged on the surface of the second shell facing one side of the first shell, and a battery cell accommodating space is defined between the first shell and the second shell; the battery cell is arranged in the battery cell accommodating space.
Laminate polymer battery, set up first protection film through the surface on one side of first casing orientation second casing, and set up the second protection film on the surface of second casing orientation first casing one side, can protect the electric core that sets up in the electric core accommodation space injectd by first casing and second casing betterly, and can improve the performance of first casing and second casing, can improve laminate polymer battery's bulk strength, can effectively improve laminate polymer battery's anti extrusion, anti collision and anti puncture performance, can effectively avoid laminate polymer battery's inefficacy, improve laminate polymer battery's security performance, this laminate polymer battery's life and safety in utilization are higher.
In some embodiments of the present invention, the first housing has a first recess, the first protection film is disposed in the first recess, the second housing has a second recess, the second protection film is disposed in the second recess, the first recess and the second recess define the battery cell receiving space, wherein the recess depth of the first recess and the recess depth of the second recess are both 0.3-6 mm.
Optionally, the first protective film and the second protective film each have a thickness of 0.04-6 mm.
Optionally, an orthographic projection of the first protection film on the first housing is located inside the first recess, and a distance between the first protection film edge and the first recess edge is not less than 0.5 mm; the second protection film is arranged in the second concave part, the orthographic projection of the second protection film on the second shell is located inside the second concave part, and the distance between the edge of the second protection film and the edge of the second concave part is not less than 0.5 mm.
Further, an orthographic projection of the cell on the first protection film is located inside the first protection film, and a distance between the edge of the cell and the edge of the first protection film is not less than 0.5 mm; the orthographic projection of the battery cell on the second protective film is located inside the second protective film, and the distance between the edge of the battery cell and the edge of the second protective film is not less than 0.5 mm.
In some embodiments of the present invention, the material forming the first housing and the material forming the second housing each comprise an aluminum plastic film.
Alternatively, the material forming the first protective film and the material forming the second protective film each include a poly-p-phenylene terephthalamide film, or a composite film of polypropylene and poly-p-phenylene terephthalamide.
Further, the first protection film is formed on the surface of the first housing facing the second housing by means of hot pressing or heat sealing; the second protective film is formed on the surface of the second shell facing the first shell in a hot pressing or heat sealing mode.
In some embodiments of the present invention, the first casing has a plurality of first recesses arranged at intervals therein, the second casing has a plurality of second recesses arranged at intervals therein, and a plurality of the cell accommodating spaces are defined between the plurality of first recesses and the plurality of second recesses; the battery cells and the battery cell accommodating spaces are arranged in a one-to-one correspondence manner.
In another aspect of the utility model, the utility model provides a battery module, according to the utility model discloses an embodiment, this battery module includes preceding arbitrary the laminate polymer battery.
Drawings
Fig. 1 is a schematic cross-sectional structural view of a pouch battery according to an embodiment of the present invention;
fig. 2 is a top view of a pouch battery according to an embodiment of the present invention;
fig. 3 is a top view of a pouch battery according to another embodiment of the present invention.
Reference numerals:
the soft package battery comprises a soft package battery 1000, a first shell 100, a second shell 200, a first depressed part 101, a second depressed part 201, a first protection film 111, a second protection film 211 and a battery cell 3.
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 reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "side", "periphery", "relative", "spacing", "inner", "center", "spacing", "edge", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present 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 one or two or more of that feature.
In the present invention, unless otherwise expressly stated or limited, the terms "fixed" and the like are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral part; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. 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 one aspect of the present invention, the utility model provides a laminate polymer battery. According to the embodiment of the present invention, referring to fig. 1 and fig. 2 (fig. 1 is a schematic cross-sectional structure along the AA' direction in fig. 2), the pouch battery 1000 includes: a first casing 100 and a second casing 200 which are oppositely arranged, wherein the surface of the first casing 100 facing the second casing 200 is provided with a first protective film 111, the surface of the second casing 200 facing the first casing 100 is provided with a second protective film 211, and a cell accommodating space (not marked in the figure) is defined between the first casing 100 and the second casing 200; this laminate polymer battery 1000 still includes electric core 3, and electric core 3 sets up in electric core accommodation space.
In some embodiments of the present invention, referring to fig. 1 and 2, the first casing 100 may have a first recess 101, the first protection film 111 may be disposed in the first recess 101, the second casing 200 may have a second recess 201, the second protection film 211 may be disposed in the second recess 201, the first recess 101 and the second recess 201 define a cell accommodating space, wherein the recess depths of the first recess 101 and the second recess 201 may be 0.3-6 mm. Specifically, the depression depth h may be 0.5mm, may be 0.8mm, may be 1mm, may be 1.5mm, may be 2mm, may be 2.5mm, may be 3mm, may be 3.5mm, may be 4mm, may be 4.5mm, may be 5mm, or the like. Therefore, the first protection film 111 can be better disposed in the first recess 101, the second protection film 211 can be disposed in the second recess 201, and the battery cell 3 can be disposed in the cell accommodating space, so that a sealed soft package battery structure is formed, the battery cell 3 can be better protected by the first protection film 111 and the second protection film 211, and the overall strength of the soft package battery 1000 can be improved.
Specifically, the joints of the first recess 101 and the second recess 201 with the housing may be right-angle transition or circular arc transition. The process method of forming the first and second recess portions 101 and 201 may be a pit punching process of punching a double pit or a pit punching process of punching a single pit. That is, referring to fig. 3, the number of the first recess 101 in the first housing 100 is not particularly limited, and may be 1, may be 2, or the like, and thus, the first recess 101 and the second recess 201 may be relatively simply formed. Specifically, referring to fig. 3, the first casing 100 may have a plurality of first recesses 101 disposed at intervals therein, the second casing 200 may have a plurality of second recesses 201 disposed at intervals therein, and a plurality of cell accommodating spaces are defined between the plurality of first recesses 101 and the plurality of second recesses 201; the plurality of battery cells 3 and the plurality of battery cell accommodating spaces are arranged in a one-to-one correspondence manner. Therefore, the soft package battery 1000 has a wide application range and high production efficiency.
Specifically, the material forming the first casing 100 and the material forming the second casing 200 may each include an aluminum plastic film. Therefore, the material source is wide, the production cost can be reduced, and the pouch battery 1000 can be manufactured well.
According to an embodiment of the present invention, the material forming the first protective film 111 and the material forming the second protective film 211 may include a poly-p-phenylene terephthalamide film, or a composite film of polypropylene and poly-p-phenylene terephthalamide. From this, first protection film 111 and second protection film 211 that this material formed can have higher intensity, and have high insulation, high temperature resistant, chemical corrosion resistant's advantage, can adapt to the chemical corrosion environment of the inside thermal runaway of electric core 3 and electrolyte, and the film quality is lighter, can be when guaranteeing laminate polymer battery energy density advantage, improve laminate polymer battery 1000's anti extrusion, anti collision strength and anti impaling intensity, even damaged the breaking of outside casing (for example plastic-aluminum membrane), inboard first protection film 111 and second protection film 211 still can play transition or isolated effect between external and the 3 internal environment of electric core, after preventing that full electric core 3 of electric state breaks, electric core 3 leads to generating heat and catching fire with the external high humid environment contact, can improve laminate polymer battery 1000's security performance.
It should be noted that, protect electric core through the protection piece that sets up full parcel type or harder protection network among some present laminate polymer batteries, improve laminate polymer batteries's intensity, however the setting of full parcel type protection piece is unfavorable for the infiltration of follow-up electrolyte, is unfavorable for improving laminate polymer batteries's comprehensive properties, and the setting of above-mentioned harder protection network can make electric core body appear poroid indentation or the phenomenon of crushing after follow-up evacuation and pressurization processing, seriously influences laminate polymer batteries's security performance. And in the laminate polymer battery of this application, adopt comparatively soft but the higher macromolecular material of intensity to form first protection film and second protection film can be better protection electric core, improve laminate polymer battery's intensity to, do not influence the infiltration of follow-up electrolyte, the phenomenon that poroid indentation or crush injury can not appear in the electric core body.
Specifically, the thicknesses of the first protective film 111 and the second protective film 211 may each be 0.04-6 mm. For example, the thickness may be 0.1mm, may be 0.5mm, may be 1mm, may be 1.5mm, may be 2mm, may be 2.5mm, may be 3mm, may be 3.5mm, may be 4mm, may be 4.5mm, may be 5mm, or the like. From this, electric core 3 can be protected betterly to first protection film 111 and second protection film 211 in this thickness scope, can further improve the intensity and the performance of first casing 100 and second casing 200, and then can improve laminate polymer battery 1000's bulk strength, further improve laminate polymer battery 1000's anti extrusion, anti collision and anti puncture performance, can effectively avoid laminate polymer battery 1000's inefficacy, improve laminate polymer battery 1000's security performance, this laminate polymer battery 1000's life and safety in utilization are higher.
Specifically, the orthographic projection of the first protection film 111 on the first housing 100 may be located inside the first recess 101, and the distance between the edge of the first protection film 111 and the edge of the first recess 101 is not less than 0.5 mm; the second protection film 211 is disposed in the second recess 201, an orthographic projection of the second protection film 211 on the second housing 200 may be located inside the second recess 201, and a distance between an edge of the second protection film 211 and an edge of the second recess 201 is not less than 0.5 mm. From this, can form local protection to electric core 3 through separately first protection film 111 and the second protection film 211 that sets up, can protect electric core 3 betterly, compare in the protection mode with the whole parcel of electric core, separately set up first protection film 111 and second protection film 211 in this application and do not influence the infiltration effect after annotating the liquid, can also effectively avoid later stage pressurization in-process electric core 3 to appear the indentation or electric core 3 is crushed by pressure, can effectively avoid laminate polymer battery 1000's inefficacy, further improve polymer battery 1000's life and safety in utilization.
Specifically, the orthographic projection of the battery cell 3 on the first protection film 111 is located inside the first protection film 111, and the distance between the edge of the battery cell 3 and the edge of the first protection film 111 is not less than 0.5 mm; the orthographic projection of the battery cell 3 on the second protective film 211 is positioned inside the second protective film 211, and the distance between the edge of the battery cell 3 and the edge of the second protective film 211 is not less than 0.5 mm. Therefore, the protection effect of the first protection film 111 and the second protection film 211 on the battery cell 3 can be further improved, the wetting effect after liquid injection is not affected, and indentation of the battery cell 3 or crushing of the battery cell 3 in the later pressurizing process are avoided.
Specifically, the first protection film 111 may be formed on the surface of the first case 100 facing the second case 200 by hot pressing or heat sealing; the second protective film 211 is formed on the surface of the second housing 200 facing the first housing 100 by hot pressing or heat sealing. Therefore, after the first protection film 111 and the second protection film 211 are combined with the first casing 100 and the second casing 200 formed by the aluminum plastic film, a stable integrated structure can be formed, and a certain strength can be achieved between the first protection film 111 and the second protection film 211 and the first casing 100 and the second casing 200 formed by the aluminum plastic film, so that the first protection film and the second protection film do not move or fall off, the extrusion resistance, the collision resistance and the puncture resistance of the pouch battery 1000 can be further improved, and the service life and the use safety of the pouch battery 1000 are improved.
Specifically, a layer of polyurethane hot melt adhesive may be uniformly applied to the inner side surfaces of the first recess 101 and the second recess 201, then the first protective film 111 and the second protective film 211 formed by a poly-p-phenylene terephthalamide film are placed at the inner center positions of the first recess 101 and the second recess 201, the first protective film 111 and the first casing 100 are fixed by hot pressing, the second protective film 211 and the second casing 200 are fixed, after the first protective film 111 and the first casing 100 and the second protective film 211 and the second casing 200 are cooled into a whole, the laminated battery cell 3 is placed at the center position of the casing recess combined with the first protective film 111 and the second protective film 211, and the battery cell 3 is sealed and subjected to subsequent process production.
Specifically, the periphery of the first protective film 111 formed by a composite film material of polypropylene and poly-p-phenylene terephthalamide may be bonded and fixed to the first casing 100 and the periphery of the second protective film 211 may be bonded and fixed to the second casing 200 by using a linear heat sealing or a dot heat sealing, after the first protective film 111 and the first casing 100 and the second protective film 211 and the second casing 200 are cooled to be integrated, the wound battery cell 3 is placed at the center of the casing recess where the first protective film 111 and the second protective film 211 are combined, and the battery cell 3 is covered and encapsulated and then subjected to subsequent process production. From this, can further improve laminate polymer battery 1000's bulk strength, improve laminate polymer battery 1000's anti extrusion and anti collision and anti puncture performance, can effectively avoid laminate polymer battery 1000's inefficacy, improve laminate polymer battery 1000's security performance, improve laminate polymer battery 1000's life and safety in utilization.
To sum up, according to the utility model discloses laminate polymer battery 1000, set up first protection film 111 through the surface in first casing 100 towards second casing 200 one side, and set up second protection film 211 towards the surface in first casing 100 one side at second casing 200, can protect well and set up electric core 3 in the electric core accommodation space of injecing by first casing 100 and second casing 200, and can improve the intensity and the performance of first casing 100 and second casing 200, can improve laminate polymer battery 1000's bulk strength, improve laminate polymer battery 1000's anti extrusion, anti collision and anti puncture performance, can effectively avoid laminate polymer battery 1000's inefficacy, improve laminate polymer battery 1000's security performance, this laminate polymer battery 1000's life and safety in utilization are higher.
The utility model discloses an on the other hand, the utility model provides a battery module. According to the utility model discloses an embodiment, this battery module can include preceding laminate polymer battery, from this, this battery module has preceding laminate polymer battery has all characteristics and advantages, no longer gives unnecessary details here. Generally speaking, the battery module has the advantages of good overall strength, good extrusion resistance, good collision resistance, good puncture resistance, long service life and high use safety.
In the description herein, references to the description of the term "some embodiments" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A pouch cell, comprising:
the battery pack comprises a first shell and a second shell which are oppositely arranged, wherein a first protective film is arranged on the surface of the first shell facing one side of the second shell, a second protective film is arranged on the surface of the second shell facing one side of the first shell, and a battery cell accommodating space is defined between the first shell and the second shell;
the battery cell is arranged in the battery cell accommodating space.
2. The pouch battery according to claim 1, wherein the first case has a first recess, the first protective film is disposed in the first recess, the second case has a second recess, the second protective film is disposed in the second recess, the first recess and the second recess define the cell accommodating space, and wherein the recess depths of the first recess and the second recess are each 0.3 to 6 mm.
3. The pouch battery according to claim 2, wherein the first protective film and the second protective film each have a thickness of 0.04-6 mm.
4. The pouch cell according to claim 2, wherein an orthographic projection of the first protection film on the first case is located inside the first recess, and a distance between an edge of the first protection film and an edge of the first recess is not less than 0.5 mm;
the second protection film is arranged in the second concave part, the orthographic projection of the second protection film on the second shell is located inside the second concave part, and the distance between the edge of the second protection film and the edge of the second concave part is not less than 0.5 mm.
5. The laminate battery of claim 4, wherein the orthographic projection of the cell on the first protective film is located inside the first protective film, and the distance between the cell edge and the first protective film edge is not less than 0.5 mm;
the orthographic projection of the battery cell on the second protective film is located inside the second protective film, and the distance between the edge of the battery cell and the edge of the second protective film is not less than 0.5 mm.
6. The pouch cell according to claim 1, wherein a material forming the first case and a material forming the second case each comprise an aluminum plastic film.
7. The pouch cell according to claim 6, wherein a material forming the first protective film and a material forming the second protective film each comprise a poly-p-phenylene terephthalamide film, or a composite film of polypropylene and poly-p-phenylene terephthalamide.
8. The pouch battery according to claim 7, wherein the first protective film is formed on a surface of the first case facing the second case by means of hot pressing or heat sealing; the second protective film is formed on the surface of the second shell facing the first shell in a hot pressing or heat sealing mode.
9. The pouch battery according to claim 2, wherein the first casing has a plurality of spaced apart first recesses therein, the second casing has a plurality of spaced apart second recesses therein, and a plurality of the cell accommodating spaces are defined between the plurality of first recesses and the plurality of second recesses;
the battery cells and the battery cell accommodating spaces are arranged in a one-to-one correspondence manner.
10. A battery module, characterized in that the battery module comprises the pouch battery according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922115543.9U CN210897342U (en) | 2019-11-29 | 2019-11-29 | Laminate polymer battery and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922115543.9U CN210897342U (en) | 2019-11-29 | 2019-11-29 | Laminate polymer battery and battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210897342U true CN210897342U (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922115543.9U Active CN210897342U (en) | 2019-11-29 | 2019-11-29 | Laminate polymer battery and battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210897342U (en) |
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2019
- 2019-11-29 CN CN201922115543.9U patent/CN210897342U/en active Active
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