CN114008839A - Battery packaging shell and battery - Google Patents
Battery packaging shell and battery Download PDFInfo
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- CN114008839A CN114008839A CN202080028118.9A CN202080028118A CN114008839A CN 114008839 A CN114008839 A CN 114008839A CN 202080028118 A CN202080028118 A CN 202080028118A CN 114008839 A CN114008839 A CN 114008839A
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 73
- 239000011888 foil Substances 0.000 claims abstract description 179
- 239000000463 material Substances 0.000 claims description 89
- 239000000758 substrate Substances 0.000 claims description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- -1 polypropylene Polymers 0.000 claims description 10
- 239000004743 Polypropylene Substances 0.000 claims description 9
- 229920001155 polypropylene Polymers 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000004677 Nylon Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000009826 distribution Methods 0.000 abstract description 7
- 230000004308 accommodation Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 201
- 239000000872 buffer Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
- H01M50/134—Hardness
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The application discloses battery packaging shell and battery can reduce the probability that the battery takes place to damage. The application provides a battery packaging shell, include the accommodation space who is established by a plurality of wallings, just different regional distributions of wall have first foil layer and second foil layer, the hardness of first foil layer is greater than the hardness of second foil layer, just first foil layer with the hardness value difference more than or equal to HB300 of second foil layer.
Description
Technical Field
The application relates to the field of batteries, in particular to a battery packaging shell and a battery.
Background
The traditional battery is very easy to damage, and once the battery is damaged, economic damage can be caused, reaction solution in the battery is very likely to leak, the environment is polluted, even a sharp-angled short circuit is caused, the battery is caused to smoke, fire or even explode, and the battery is very dangerous.
It is desirable to provide a new battery packaging foil that reduces the chance of breakage of the battery.
Disclosure of Invention
The application provides a battery packaging shell and battery, can reduce the probability that the battery takes place to damage.
The application provides a battery packaging shell, include the accommodation space who is established by a plurality of wallings, just different regional distributions of wall have first foil layer and second foil layer, the hardness of first foil layer is greater than the hardness of second foil layer, just first foil layer with the hardness value difference more than or equal to HB300 of second foil layer.
Since the difference in the hardness values of the first and second foil layers is HB300 or more, the first foil layer has a minimum hardness of HB300 and has sufficient strength to protect the battery cell mounted in the battery pack case. And the hardness of the second foil layer is lower, so that the processing by a user is convenient, and the processing difficulty in the preparation of the battery packaging shell is reduced.
The number of the walls is at least 4, the walls are connected through edges to enclose the closed accommodating space, and the first foil layer is distributed in the middle area of the walls, so that the strength of the battery packaging shell can be greatly enhanced.
Because battery packaging shell when taking place to drop, very easy collide with the corner of battery packaging shell, consequently, arbitrary three or more the crossing punishment of wall distributes has first foil layer, and the great first foil layer of this hardness can protect the corner of battery packaging shell prevents the corner of battery packaging shell is in the battery packaging shell takes place to destroy when dropping.
The battery pack case further includes: a safety valve mounted to the first surface of the wall and penetrating the wall in a direction perpendicular to the first surface of the wall. Thus, when the battery core loaded in the battery packaging shell reacts to generate gas and the like, the safety valve can be opened to release pressure, and the battery packaging shell is prevented from breaking due to failure.
The second foil layer has a density less than that of the first foil layer to reduce the overall weight of the battery can.
A first material layer is arranged between the first foil layer and the second foil layer, and the material of the first material layer comprises at least one of polypropylene material or polyacrylic material. The first material layer has a certain buffering effect, can buffer the stress between the first foil layer and the second foil layer, has an impact-resistant effect, and can absorb part of impact when the battery packaging shell falls off to prevent the battery packaging shell from being damaged.
The battery packaging shell further comprises a base material, the first surface of the base material faces the outside of the battery packaging shell, the first foil layer and the second foil layer are both formed on the first surface of the base material, and the base material plays a role in connecting the first foil layer and the second foil layer.
The first foil layer comprises at least one of a stainless steel layer, a titanium alloy layer and an aluminum alloy layer, the second foil layer comprises an aluminum layer, and the base material comprises a polypropylene layer and meets the requirement that the hardness value difference value is greater than or equal to HB 300.
The battery pack case further includes: and the second material layer is at least positioned between the first foil layer and the substrate and at least positioned between the second foil layer and the substrate, and the viscosity of the second material layer is greater than a preset value. The second material layer may bond the first foil layer and the substrate, and bond the second foil layer and the substrate. And when the second material layer is only positioned between the first foil layer and the base material and between the second foil layer and the base material, the adhesive effect is achieved, and meanwhile, the using amount of the second material layer can be saved, and the material cost is saved.
Because the hardness of the second foil layer is lower than that of the first foil layer, the second foil layer is easily scratched in the using process, and therefore, a third material layer is formed on the first surface of the second foil layer to protect the surface of the second foil layer and prevent the surface of the second foil layer from being scratched.
The material of the third material layer comprises at least one of a nylon material or a resin material.
The thickness of the first foil layer is larger than that of the second foil layer, and the first surface of the third material layer positioned on the same side of the battery packaging shell is flush with the first surface of the first foil layer. Therefore, the battery packaging shell can be ensured to be flat, the assembly is convenient, and the storage of the battery packaging shell is convenient.
The application provides a battery, includes: the battery packaging shell; and the battery core is arranged in the battery packaging shell.
The battery packaging shell is a hexahedral packaging shell, and the first foil layer is distributed in the middle area of each wall of the hexahedral packaging shell. The middle area of each wall is the area which is most easily impacted when the battery receives impact, therefore, the first foil layer is arranged in the middle area of each wall, the service life of the battery can be prolonged, and the battery is prevented from being damaged due to the fact that the middle area of the wall is damaged due to dropping, collision and the like, and the battery is damaged, and the service life of the battery is influenced.
Because the battery packaging shell still collides with the corner of the battery packaging shell very easily when falling, therefore, the first foil layer is also distributed at the corner of the hexahedron packaging shell to protect the corner of the battery packaging shell and prevent the corner of the battery packaging shell from being damaged when falling.
The hexahedral packaging shell comprises a first wall, the intersection of the first wall and other walls is a sealed edge area, and the second foil layer is distributed in the sealed edge area.
The second foil layer has a density less than that of the first foil layer to reduce the overall weight of the battery can.
A first material layer is arranged between the first foil layer and the second foil layer, and the material of the first material layer comprises at least one of polypropylene material or polyacrylic material. The first material layer has a certain buffering effect, can buffer the stress between the first foil layer and the second foil layer, has an impact-resistant effect, and can absorb part of impact when the battery packaging shell falls off to prevent the battery packaging shell from being damaged.
The battery packaging shell and the battery have the first foil layer and the second foil layer with hardness value difference values of at least HB300, so that the minimum hardness of the first foil layer is HB300, the hardness of the battery packaging shell and the battery can be improved, the probability of breakage of the battery and the battery packaging shell is reduced, and the difficulty of processing the battery packaging shell can be simplified due to the lower hardness of the second foil layer.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a battery pack case in a first embodiment of the present application;
fig. 2 is a schematic top view of the first wall 105 in the first embodiment of the present application;
FIG. 3 is a side view of the first wall 105 in a first embodiment of the present application;
FIG. 4 is a schematic structural view of a battery package casing of a second embodiment of the present application;
fig. 5 is a schematic structural view of a battery pack case of a third embodiment of the present application;
fig. 6 is a schematic structural diagram of the battery according to an embodiment of the present application.
Detailed Description
The inventor researches and discovers that the reason that the battery in the prior art is easy to break is that the battery generally adopts an aluminum film as a packaging shell, and the aluminum film has low hardness and is easy to scratch under the action of external force, so that the battery is broken.
In addition, the battery can generate heat and generate gas in the use process, and the aluminum film has low hardness and is easy to deform, so that the battery is easy to bulge in the use process, sharp-angle short circuit is caused, and the battery generates smoke, fires and even explodes.
The inventor researches and discovers that if a single material with higher hardness, such as a steel foil material, is used for preparing the battery packaging shell, the defect of lower hardness of an aluminum film can be overcome, but the higher hardness of the material causes high processing difficulty, low yield and high cost in the production of the battery packaging shell, and the battery packaging shell is not suitable for large-scale industrial production.
In order to overcome the above problems, the inventors have proposed a battery pack case and a battery.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a battery package case in a first embodiment of the present application, and fig. 2 is a schematic top structural diagram of a first wall 105 in the first embodiment of the present application.
In this first embodiment, the battery package 100 includes a receiving space surrounded by a plurality of walls 101 (see fig. 2 in detail). A first foil layer 102 and a second foil layer 103 are distributed on different areas of the wall 101, the hardness of the first foil layer 102 is greater than that of the second foil layer 103, and the difference between the hardness values of the first foil layer 102 and the second foil layer 103 is greater than or equal to HB 300.
Since the difference between the hardness values of the first foil layer 102 and the second foil layer 103 is greater than or equal to HB300, the first foil layer 102 has a minimum hardness of HB300, has sufficient strength, and can protect the battery cells mounted in the battery pack case 100. Moreover, the hardness of the second foil layer 103 is low, so that a user can conveniently process and form the battery packaging shell, and a soft package packaging process is realized.
Since the battery cell is generally hexahedral in shape, the battery pack case 100 is also a hexahedral pack case in conformity with the shape of the battery cell to be assembled. In the first embodiment, the battery cell to be packaged is in the shape of a rectangular parallelepiped, the battery pack case 100 is in conformity with the shape of the battery cell and is a rectangular parallelepiped pack case, and the size of the battery pack case 100 is slightly larger than that of the battery cell, and has six walls 101, the edges of the respective walls 101 being joined to enclose the rectangular parallelepiped space.
In fact, the shape of the battery pack case 100 may be set according to the shape of the battery cell, and is not limited to the hexahedral pack case of fig. 1.
Please refer to fig. 1, fig. 2 and fig. 3, wherein fig. 3 is a side view of the wall in the first embodiment.
The side of the wall 101 facing the inside of the battery pack case is a second surface of the base material 300, and the first surface 3001 of the base material 300 is opposite to the second surface of the base material 300 and faces the outside of the battery pack case 100.
The first foil layer 102 and the second foil layer 103 are distributed on different areas of the first surface 3001 of the substrate 300, and the first surfaces of the first foil layer 102 and the second foil layer 103 are disposed toward the outside of the battery pack case 100.
The first foil layer 102 includes at least one of a stainless steel layer, a titanium alloy layer, and an aluminum alloy layer, the second foil layer 103 includes an aluminum layer, and the substrate 300 includes a polypropylene layer. The use of these material layers as the first and second foil layers 102 and 103 can increase the hardness of the battery pack case 100, and can reduce the difficulty of processing the battery pack case 100 by planning the distribution of the first and second foil layers 102 and 103.
Since the middle region of each wall 101 is the region where the battery is most easily impacted, in the first embodiment, the first foil layer 102 is disposed in the middle region of each wall 101, so that the middle region of the wall 101 is prevented from being damaged when the battery is dropped, collided, etc., which may damage the battery cell packaged inside the battery pack case 100, thereby affecting the service life of the battery, and the shape and size of the middle region may be set by a user as desired.
In the first embodiment shown in fig. 1 and 2, the shape of the intermediate region is rectangular, and the shape and size of the first foil layer 102 of the intermediate region are the same as the shape and size of the intermediate region. The shape of the first foil layer 102 of the middle area is similar to the shape of the wall 101 of the battery pack case 100, and the ratio of the first foil layer 102 of the middle area to the corresponding side of the wall 101 is 0.6 or more.
Since the corners of the battery pack case 100 are easily bumped when the battery pack case 100 drops, in the first embodiment shown in fig. 1, the first foil layer 102 is distributed at the intersection of any three or more walls, and the first foil layer 102 with higher hardness can protect the corners of the battery pack case 100 and prevent the corners of the battery pack case 100 from being damaged when the corners drop.
In fact, as shown in fig. 4, the first foil layer 102 may be distributed only in the middle area of the wall 101, or as shown in fig. 5, the first foil layer 102 may be distributed only at the intersection of three or more walls, and the specific distribution area of the first foil layer 102 may be set according to actual requirements.
Since the foil needs to be bent to form each wall 101 and be enclosed into the accommodating space when the battery pack case 100 is prepared, the second foil layers 103 having lower hardness are distributed in the region of the foil where bending is expected, that is, the second foil layers are distributed at the joint of the edges of the walls 101, so as to reduce the processing difficulty when preparing the battery pack case 100.
In practice, the distribution area of the second foil layer 103 may also be set as desired. In the first embodiment, all areas except the middle area of the respective wall 101, where the first foil layer 102 is distributed, and the corners, are distributed with said second foil layer 103.
In the first embodiment, the first foil layer 102 is a stainless steel layer, the second foil layer 103 is an aluminum layer, the hardness range of the stainless steel layer is HB600 to HB660, the hardness range of the aluminum layer is HB62 to HB150, the hardness value difference between the stainless steel layer and the aluminum layer is at least HB450, and is greater than the hardness value difference HB300 required by the composite foil 100, so that the hardness requirements of the first foil layer 102 and the second foil layer 103 are met.
In a first embodiment, the stainless steel layer has a thickness in the range of 0.04mm to 0.150mm and the aluminum layer has a thickness in the range of 0.05mm to 0.180 mm. In this thickness range, the battery pack 100 can provide better protection. In practice, the thickness distribution of the stainless steel layer and the aluminum layer may also be set as desired.
The first surface of the substrate 300 is formed with a second material layer 301 for adhering the first foil layer 102 and the second foil layer 103, and the second material layer 301 is at least arranged between the substrate 300 and the first foil layer 102, and between the substrate 300 and the second foil layer 103, so that the adhesive effect is realized, the amount of the second material layer 301 is reduced, and the effects of reducing material cost and protecting environment are achieved.
The viscosity of the second material layer 301 should be sufficiently high to meet the requirement of bonding the first foil layer 102 and the second foil layer 103 to the first surface of the substrate 300, and to prevent displacement of the first foil layer 102 and the second foil layer 103 relative to the substrate 300.
This solution of forming the second material layer 301 only between the substrate 300 and the first foil layer 102 and between the substrate 300 and the second foil layer 103 is suitable for the situation where a gap is formed between the first foil layer 102 and the second foil layer 103 and no other material is filled in the gap. In fact, the specific distribution of the first foil layer 102 and the second foil layer 103 can be planned as required, for example, the first foil layer 102 and the second foil layer 103 are disposed in a contiguous arrangement without the gap therebetween.
In the first embodiment, the first material layer 302 is filled in the gap, but is not shown in fig. 1 and 2, and the filled first material layer 302 is shown in fig. 3.
In the first embodiment shown in fig. 3, the gap is filled with a first material layer 302, and the first material layer 302 is made of a material with better absorption performance, absorbs vibration and stress between the first foil layer 102 and the second foil layer 103, and buffers impact from the outside, so as to further optimize the shock resistance of the battery packaging case 100.
In the first embodiment, the first material layer 302 includes at least one of a polypropylene layer, a polyethylene layer, and a nylon layer. In other embodiments, the specific material composition of the first material layer 302 can be set according to requirements, and preferably has better absorption performance.
When the first material layer 302 is disposed, the second material layer 301 is also formed on the first surface 3001 of the substrate 300 with the exposed gap for bonding the first material layer 302.
In this first embodiment, since the hardness of the second foil layer 103 is less than the hardness of the second foil layer 103, a third material layer 303 is also provided to protect the second foil layer 103. This third material layer 303 is likewise not shown in said fig. 1, 2, but only in fig. 3. The third material layer 303 is formed on the first surface of the second foil layer 103, has high resistance, including corrosion resistance, wear resistance, etc., and can prevent the second foil layer 103 of the battery pack case 100 from being worn during use.
In some other embodiments, the third material layer 303 may also be provided to the first surface of the first foil layer 102. In this way, the protective effect on the surfaces of the first foil layer 102 and the second foil layer 103 can be achieved.
The third material layer 303 is adhered to the first surfaces of the first and second foil layers 102 and 103 by glue or the like, and the material of the third material layer 303 includes at least one of a nylon material or a resin material. In fact, the third material layer 303 may be provided as needed.
In the first embodiment shown in fig. 3, the thickness of the second foil layer 103 is smaller than that of the first foil layer 102, the height of the third material layer 303 matches the height difference between the first foil layer 102 and the second foil layer 103, and the first surface of the third material layer 303 is flush with the first surface of the first foil layer 102, so that the outer surface of the battery pack case is flat for easy assembly.
Referring to fig. 1, 4 and 5, the battery pack case further includes: a safety valve 106 is mounted on a first surface of the wall 101 (see fig. 2) and penetrates the wall 101 in a direction perpendicular to the first surface of the wall 101. Thus, when the battery cell loaded in the battery packaging shell 100 generates heat and generates gas, the safety valve 106 can be opened to release the pressure, so that the battery packaging shell is prevented from swelling and even bursting due to excessive gas in the battery packaging shell.
In the first embodiment shown in fig. 1, 4 and 5, the battery pack case includes only one safety valve 106, which is disposed on the first surface of the first wall 105 and penetrates the first wall 105 to form a controllable gas flow path, and the safety valve 106 is controlled to open to discharge the gas in the battery pack case 100 when necessary.
In fact, the specific number and arrangement of the safety valves 106 can be set according to the requirement, for example, two safety valves 106 are set, and the two safety valves 106 are respectively located at two sides of the first wall 105, or three safety valves 106 are set, and each safety valve is respectively located at each wall of the battery packaging shell.
The safety valve 106 is a check valve that prevents external air from entering the battery pack case 100. In fact, the safety valve 106 may be a normally closed two-way valve, which is opened only when pressure relief is required, so that external gas is hard to enter the battery pack 100.
In the first embodiment, the density of the second foil layer 103 is less than the density of the first foil layer 102 to reduce the overall mass of the battery can 100.
The embodiment of the application also provides a battery.
Fig. 6 is a schematic structural diagram of a battery 600 according to an embodiment of the present application.
In this embodiment, the battery 600 includes the battery package casing 100 (shown in fig. 1) and a battery core 601, and the battery core 601 is disposed in the battery package casing 100.
The battery cell 601 is an electrochemical battery cell including a positive electrode and a negative electrode, and is a storage part in the battery 600, and can be directly used as the battery 600 after being provided with a protection circuit and the battery pack case 100.
A first surface of the battery cell 601 is opposite to a predetermined area 602 of the inner surface of the battery pack case 100, and the first surface is in contact with the predetermined area 602 when the battery cell 601 is assembled in the battery pack case 100.
The preset area 602 is coated with a coating layer, the material of the coating layer comprises a hot melt adhesive, and the viscosity of the coating layer is large enough to adhere the battery core 601 to the surface of the preset area 602 and prevent the battery core 601 from slipping compared with the preset area 602, so that the battery core 601 is prevented from slipping and colliding compared with the battery package casing 100 in the battery package casing 100, and the battery core 601 and the battery package casing 100 are prevented from being damaged.
The predetermined region 602 includes at least a first portion opposite to a region where the first foil layer 102 (shown in fig. 1) is located, the first portion is not shown in fig. 6, and an area of the first portion is equal to or larger than an area of the first surface of the battery cell 601.
When the battery core 601 is assembled in the battery package casing 100, the first surface of the battery core 601 is completely in contact with the first portion of the predetermined area 602, and the projection of the first portion on the first surface of the battery core 601 covers the first surface of the battery core 601, so that the first surface of the battery core 601 can be completely protected by the first foil layer 102, thereby obtaining better protection and reducing the possibility of damage to the battery 600.
The battery core 601 is hexahedral, the shape of the battery package case 100 matches the shape of the battery core 601, and is also a hexahedral package case, as shown in fig. 1, and the size of the battery package case 100 is larger than that of the battery core 601 so as to wrap the battery core 601 inside. Since the middle region of each wall is the region where the battery 600 is most easily impacted, the first foil layer 102 is disposed in the middle region of each wall, so as to prevent the middle region of the wall from being damaged when the battery 600 is dropped or collided, which leads to damage of the battery 600 and affects the service life of the battery 600.
And because the battery 600 is easy to collide with the corner of the battery 600 packaging case when falling, the first foil layer 102 is distributed at the corner of the battery packaging case 100 to protect the corner of the battery packaging case 100 and prevent the corner of the battery packaging case 100 from being damaged when the battery packaging case 100 falls.
The first wall 105 (shown in fig. 1) of the battery 600 package may be pivoted about an axis that is aligned with one edge. When the battery 600 is packaged, the first wall 105 is lifted, the battery core 601 is assembled in the battery packaging case 100, and the first wall 105 is sealed to the opening of the unsealed accommodating area surrounded by the other walls 101, so that the packaging is completed.
The other side of the first wall 105 opposite to the side where the shaft is located forms a top seal, the tab of the battery core 601 extends out of the top seal, and the other two sides of the first wall 105 perpendicular to the side where the shaft is located form side seals. Both the top seal and the side seal belong to the seal edge region 104 (shown in fig. 1). Since the foil material constituting the battery pack case 100 needs to be bent during the process of preparing the edge sealing region 104 of the battery pack case 100, the second foil layer 102 having a lower hardness is distributed in the edge sealing region 104 to meet the bending requirement.
In the embodiment illustrated in fig. 6, the density of the second foil layer 103 (shown in fig. 1) is less than the density of the first foil layer 102 to reduce the overall weight of the battery 600.
A first material layer 301 (as shown in fig. 3) is disposed between the first foil layer 102 and the second foil layer 103, and the material of the first material layer 301 includes at least one of a polypropylene material or a polyacrylic material, has a buffer effect, can buffer stress between the first foil layer 102 and the second foil layer 103, and has an impact-resistant effect. When the battery 600 is dropped, a part of the impact is absorbed, and the battery pack case 100 of the battery 600 is prevented from being damaged.
The battery packaging shell 100 and the battery of the application use the first foil layer 102 and the second foil layer 103 with the hardness value difference of at least HB300, so that the minimum hardness of the first foil layer 102 is HB300, the hardness of the composite foil, the battery packaging shell and the battery can be improved, the probability of breakage of the battery can be reduced, and the processing difficulty of the battery packaging shell 100 can be simplified due to the lower hardness of the second foil layer 103.
The above-mentioned embodiments are only examples of the present application, and not intended to limit the scope of the present application, and all equivalent structures or equivalent flow transformations made by the contents of the specification and the drawings, such as the combination of technical features between the embodiments and the direct or indirect application to other related technical fields, are also included in the scope of the present application.
Claims (15)
1. A battery package, comprising:
the wall comprises a plurality of walls, wherein an accommodating space is formed in the wall in an enclosing mode, a first foil layer and a second foil layer are distributed in different areas of the wall, the hardness of the first foil layer is greater than that of the second foil layer, and the hardness value difference value of the first foil layer and the second foil layer is greater than or equal to HB 300.
2. The battery packaging case according to claim 1, wherein the number of the walls is at least 4, the walls are connected by edges to enclose the receiving space, the first foil layer is distributed in the middle area of the walls, and/or,
the first foil layer is distributed at the intersection of any more than three of the walls.
3. The battery package of claim 1, further comprising: a safety valve mounted to the first surface of the wall and penetrating the wall in a direction perpendicular to the first surface of the wall.
4. The battery packaging can of claim 1, wherein the density of the second foil layer is less than the density of the first foil layer.
5. The battery packaging can of claim 1, wherein a first layer of material is disposed between the first and second foil layers, the first layer of material comprising at least one of a polypropylene material or a polyacrylic material.
6. The battery packaging can of claim 1, further comprising a substrate, wherein the first surface of the substrate is disposed toward the exterior of the battery packaging can, and wherein the first foil layer and the second foil layer are both formed on the first surface of the substrate.
7. The battery packaging can of claim 6, wherein the first foil layer comprises at least one of a stainless steel layer, a titanium alloy layer, and an aluminum alloy layer, the second foil layer comprises an aluminum layer, and the substrate comprises a polypropylene layer.
8. The battery package of claim 6, further comprising: and the second material layer is at least positioned between the first foil layer and the substrate and at least positioned between the second foil layer and the substrate, and the viscosity of the second material layer is greater than a preset value.
9. The battery packaging can of claim 1, wherein the first surface of the second foil layer is formed with a third layer of material comprising at least one of a nylon material or a resin material.
10. The battery packaging can of claim 9, wherein the first foil layer has a thickness greater than the thickness of the second foil layer, and wherein a first surface of the third material layer on the same side of the battery packaging can is flush with the first surface of the first foil layer.
11. A battery, comprising:
the battery pack case of any one of claims 1 to 10;
and the battery core is arranged in the battery packaging shell.
12. The battery according to claim 11, wherein the battery pack case is a hexahedral pack case, and the first foil layer is distributed to a middle region of each wall of the hexahedral pack case.
13. The battery of claim 12, wherein the first foil layer is distributed at corners of the hexahedral packaging can;
the hexahedral packaging shell comprises a first wall, the intersection of the first wall and other walls is a sealed edge area, and the second foil layer is distributed in the sealed edge area.
14. The battery of claim 12, wherein the second foil layer has a density less than a density of the first foil layer.
15. The battery of claim 12, wherein a first layer of material is disposed between the first foil layer and the second foil layer, the first layer of material comprising at least one of a polypropylene material or a polyacrylic material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/141669 WO2022141259A1 (en) | 2020-12-30 | 2020-12-30 | Battery package casing and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114008839A true CN114008839A (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080028118.9A Pending CN114008839A (en) | 2020-12-30 | 2020-12-30 | Battery packaging shell and battery |
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| Country | Link |
|---|---|
| CN (1) | CN114008839A (en) |
| WO (1) | WO2022141259A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115275458B (en) * | 2022-07-22 | 2023-11-21 | 深圳新源柔性科技有限公司 | Flip film battery and preparation method thereof |
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| CN102709496A (en) * | 2012-01-12 | 2012-10-03 | 宁德新能源科技有限公司 | Flexible package lithium ion battery |
| CN202905884U (en) * | 2012-04-16 | 2013-04-24 | 宁德新能源科技有限公司 | Welding-packaged flexibly-packaged lithium ion battery |
| EP2897191A4 (en) * | 2012-09-11 | 2016-05-18 | Routejade Inc | Secondary battery case provided with fastening strengthening unit |
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- 2020-12-30 WO PCT/CN2020/141669 patent/WO2022141259A1/en active Application Filing
- 2020-12-30 CN CN202080028118.9A patent/CN114008839A/en active Pending
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| US6207271B1 (en) * | 1998-03-18 | 2001-03-27 | Ntk Powerdex, Inc. | Packaging material for hermetically sealed batteries |
| US20020164441A1 (en) * | 2001-03-01 | 2002-11-07 | The University Of Chicago | Packaging for primary and secondary batteries |
| CN106199199A (en) * | 2016-09-30 | 2016-12-07 | 山东齐星新能源科技有限责任公司 | A kind of detection method of flexible packing lithium ion battery aluminum plastic film corrosion |
| CN106450490A (en) * | 2016-12-16 | 2017-02-22 | 天津力神电池股份有限公司 | Method for analyzing and detecting failure reasons of micropores of flexibly packaged lithium batteries |
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| Publication number | Publication date |
|---|---|
| WO2022141259A1 (en) | 2022-07-07 |
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