CN219419133U - Battery cell - Google Patents
Battery cell Download PDFInfo
- Publication number
- CN219419133U CN219419133U CN202320122733.7U CN202320122733U CN219419133U CN 219419133 U CN219419133 U CN 219419133U CN 202320122733 U CN202320122733 U CN 202320122733U CN 219419133 U CN219419133 U CN 219419133U
- Authority
- CN
- China
- Prior art keywords
- flexible bag
- bare cell
- shell
- battery
- sealing layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 claims description 42
- 239000003792 electrolyte Substances 0.000 claims description 19
- 239000000126 substance Substances 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 4
- 238000007731 hot pressing Methods 0.000 claims description 2
- 238000005538 encapsulation Methods 0.000 claims 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 14
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 12
- 238000013461 design Methods 0.000 abstract description 8
- 238000004220 aggregation Methods 0.000 abstract description 2
- 230000002776 aggregation Effects 0.000 abstract description 2
- 238000004806 packaging method and process Methods 0.000 description 13
- 229920002799 BoPET Polymers 0.000 description 8
- 239000005041 Mylar™ Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- -1 polyethylene Polymers 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000006258 conductive agent Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 101150058243 Lipf gene Proteins 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical compound [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The present utility model relates to a battery comprising: a housing; the bare cell is arranged in the shell; the flexible bag is arranged in the shell and is provided with a containing cavity, the bare cell is arranged in the containing cavity, the bare cell is covered by the flexible bag, and the flexible bag can be compressed and deformed after being pressed. According to the battery disclosed by the utility model, in the process of battery formation, when the pole piece in the bare cell expands, the bare cell expands to squeeze the flexible bag, and certain reverse acting force is given to the bare cell through the flexible bag, so that the aggregation of gas generated in formation between pole piece interfaces is avoided, and the interface of the bare cell is improved, and therefore, the problem of poor formation interface of the hard shell battery of the current silicon-carbon system due to low group domain design is solved.
Description
Technical Field
The utility model relates to the technical field of energy storage parts, in particular to a battery.
Background
As lithium ion batteries are increasingly used, the requirements of enterprises on battery energy density are also increasing; the silicon-carbon negative electrode has higher gram capacity than the graphite negative electrode, so that the energy density of the battery can be improved more remarkably, based on the silicon-carbon negative electrode, the silicon-carbon material is gradually applied to the negative electrode at present, a positive electrode high-nickel material and negative electrode silicon-carbon system becomes a necessary trend, and meanwhile, the silicon-carbon negative electrode has relatively larger volume expansion in the charge and discharge process.
In order to avoid battery bulge in the charge and discharge process of the square aluminum shell battery, expansion of the pole pieces is considered in designing the square aluminum shell battery, a certain space is designed to accommodate thickness increase caused by expansion of the bare cell, namely, a group domain degree design is adopted, the group domain degree design is about 89% of an aluminum shell battery of a general ternary graphite system, and in a ternary silicon carbon system, the group domain degree design is far lower than 89% due to expansion of the silicon carbon pole pieces. But a low degree of group domain would lead to the following problems: when the lithium ion battery is formed, the space in the thickness direction is too large, the lamination between the pole pieces is not tight, gas generated by formation remains between interfaces, the transmission between the anode and the cathode of the lithium ion is affected, black spots are formed on the graphite electrode, and the battery performance is affected;
if the group domain degree is designed to be too high for optimizing the formation interface, the expansion force of the bare cell becomes large along with the expansion of the pole piece in the circulation process, and the circulation performance and the module structure of the cell are seriously affected. In addition, in order to avoid the short circuit between the bare cell and the shell and the extrusion damage of the chamfer at the bottom of the shell to the bare cell, the outside of the bare cell is generally covered with a layer of Mylar film and a bottom support plate.
Disclosure of Invention
Therefore, the utility model aims to solve the technical problem that the battery performance is affected by the expansion of a bare cell in the prior art, and provides a battery which can solve the problem that the silicon-based system of the square aluminum-shell battery is poor in interface during formation due to low-group-area design, and can cancel a Mylar film and a bottom support plate commonly used in the conventional square aluminum-shell battery.
In order to solve the above technical problems, the present utility model provides a battery, comprising:
a housing;
the bare cell is arranged in the shell; and
the flexible bag is provided with a containing cavity, the bare cell is arranged in the containing cavity, the flexible bag is arranged in the shell in a coating mode, the outer side of the bare cell is isolated from the shell; the flexible bag is provided with at least two layers of film structures, a sealing layer is formed in at least part of the area between the two adjacent layers of film structures, and gaseous substances or electrolyte is filled in the sealing layer.
In one embodiment of the utility model, the flexible pouch has an opening from which the bare cell is placed into the receiving cavity of the flexible pouch.
In one embodiment of the utility model, the housing has an opening, and the opening of the flexible bag is disposed on the same side as the opening of the housing.
In one embodiment of the utility model, the sealing layer ruptures releasing the electrolyte when the sealing layer is subjected to a greater expansion force than can be tolerated.
In one embodiment of the present utility model, the sealing layer can withstand an expansion force of 100kgf to 400kgf.
In one embodiment of the utility model, the sealing layer is formed by film structure hot-press packaging, and the packaging opening of the sealing layer has a certain packaging width and packaging thickness.
In one embodiment of the utility model, the total thickness of the flexible bag is 2% -10% of the total thickness of the battery, the total thickness of the flexible bag comprises the sum of the thickness of the film of the flexible bag and the thickness of the filler, and the total thickness of the battery is the thickness of the assembled bare cells and the battery shell.
In one embodiment of the utility model, the flexible bag is made of an insulating material.
In one embodiment of the utility model, a plurality of groups of bare cells are arranged in the shell, and the flexible bag is arranged between the plurality of groups of bare cells and the shell.
In one embodiment of the utility model, a plurality of groups of bare cells are arranged in the shell, and the flexible bag is arranged between the adjacent groups of bare cells and the shell.
Compared with the prior art, the technical scheme of the utility model has the following advantages:
according to the battery disclosed by the utility model, the flexible bag is arranged between the shell and the bare cell, the bare cell is covered by the flexible bag, and the flexible bag is arranged to have a certain thickness and can be compressed and deformed, so that certain reverse acting force is given to the bare cell by the flexible bag when the pole piece is expanded in the battery formation, and the aggregation of gas generated in the formation process between pole piece interfaces is avoided, so that the interface of the bare cell is improved, and the problem of poor formation interface of the hard shell bare cell of the silicon-carbon system due to low group domain degree design at present is solved;
in addition, as the flexible bag can be compressed, in the process of increasing the expansion force of the bare cell, the flexible bag can release the thickness space in the battery shell, so that the situation that the bare cell fails due to overlarge expansion force is avoided;
in addition, the flexible bag completely wraps the bare cell at the periphery and the bottom, and can play a role similar to that of a Mylar film and a bottom support plate, so that the Mylar film and the bottom support plate commonly used in the conventional square aluminum-shell battery can be omitted after the flexible bag is adopted.
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
Fig. 1 is a schematic view of the structure of a battery of the present utility model;
FIG. 2 is a schematic structural view of the flexible pouch package of the present utility model;
fig. 3 is a schematic structural view of embodiment 1 of a battery;
fig. 4 is a schematic structural view of embodiment 2 of the battery;
description of the specification reference numerals: 1. a housing; 2. a bare cell; 3. a flexible bag; 31. an electrolyte; 32. and (3) a sealing layer.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.
Referring to fig. 1, the present utility model discloses a battery including: the battery pack comprises a shell 1, a bare cell 2 and a flexible bag 3, wherein the shell 1 is a square aluminum shell commonly used for preparing a battery, an opening is formed in one side of the shell 1, the flexible bag 3 is arranged in the shell 1, the flexible bag 3 is provided with a containing cavity, the bare cell 2 is arranged in the containing cavity, the size of the containing cavity is equal to that of the bare cell 2 or slightly larger than that of the bare cell 2, the bare cell 2 can be placed in the containing cavity, the bare cell 2 is covered by the flexible bag 3, the bare cell 2 is separated from the shell 1 through the flexible bag 3, the flexible bag 3 has a certain thickness and a certain elastic deformation performance, and the flexible bag 3 can be compressed and deformed after being pressed;
in the battery formation process, when the pole pieces in the bare cell 2 are expanded, the bare cell 2 is expanded to extrude the flexible bag 3, a certain reverse acting force is given to the bare cell 2 through the flexible bag 3, and gas generated during formation is prevented from gathering between pole piece interfaces, so that the interface of the bare cell 2 is improved, and the problem of poor formation interface of the hard shell battery of the silicon-carbon system due to low group domain degree design at present is solved;
in addition, as the flexible bag 3 can be compressed, in the process of increasing the expansion force of the bare cell 2, the flexible bag 3 is compressed to give a certain expansion space to the bare cell 2, so that the situation that the bare cell 2 fails due to overlarge expansion force is avoided;
in addition, the flexible bag 3 has an opening, the opening of the flexible bag 3 corresponds to the opening of the casing 1, the bare cell 2 is placed in the accommodating cavity of the flexible bag 3 from the opening of the flexible bag 3, after the bare cell 2 is placed in the accommodating cavity, the periphery and the bottom of the bare cell 2 are completely wrapped by the flexible bag 3, and the functions similar to Mylar films and bottom plates can be achieved, so that after the flexible bag 3 of the embodiment is adopted, mylar films and bottom plates commonly used in the conventional square aluminum shell battery can be canceled.
Referring to fig. 2, the flexible bag 3 includes at least two layers of structures, a certain compression space is reserved between two adjacent layers of structures, so that the flexible bag 3 has a certain thickness capable of being compressed, a sealing layer 32 is formed between two adjacent layers of structures, electrolyte 31 is filled in the sealing layer 32, when the expansion force of the bare cell 2 is greater than the expansion force which can be tolerated by the sealing layer 32, the electrolyte 31 in the sealing layer 32 is extruded from the sealing position, the thickness of the flexible bag 3 is contracted and thinned, so as to provide a space for expanding the bare cell 2, and the extruded electrolyte 31 can also compensate the consumption of the electrolyte 31 in the battery charging and discharging process, so that the cycle performance of the battery is improved;
in other embodiments, the sealing layer 32 may be filled with a gaseous substance. The gaseous substance is an inert gas or other gas that does not react with the electrolyte and the bare cell. The sealing layer 32 is filled with inert gas, and when the expansion force of the bare cell 2 is larger than the expansion force which can be tolerated by the sealing layer 32, the flexible bag 3 breaks to release gas. In general, gases are more easily compressed than liquids, so flexible bags of the same thickness can provide a larger expansion space for filling gaseous substances than for filling liquids. That is, the same interface improving effect is achieved, the thickness of the flexible bag filled with the gaseous substance is smaller, and the space utilization of the battery is improved to some extent.
Specifically, when the expansion force that the sealing layer 32 can bear is set to be 100 kgf-400 kgf, and when the expansion force that the sealing layer can bear is larger than the expansion force that the sealing layer can bear, the sealing layer breaks to release the electrolyte 31, if the expansion force that the sealing layer can bear is set to be too small, the bare cell 2 expands in the formation process, the sealing layer 32 breaks prematurely, the acting force on the bare cell 2 is released in advance, and the interface improvement effect is not ideal; if the expansion force is too large, the sealing layer 32 cannot be broken in time after the bare cell 2 expands, the bare cell 2 can bulge, in addition, the bare cell 2 is stressed too much, the infiltration effect of the electrolyte 31 can be poor, and the battery performance can be affected;
specifically, the sealing layer 32 is formed by hot-pressing and packaging the film structure, the packaging opening of the sealing layer 32 has a packaging width and a packaging thickness, the expansion force that the sealing layer 32 can bear can be adjusted according to the packaging width L and the packaging thickness H of the sealing layer 32, and the packaging width L and the packaging thickness H are controlled by the width of the sealing head, the temperature during packaging and the pressure of the sealing head.
In the embodiment, the total thickness of the flexible bag 3 is 2% -10% of the total thickness of the battery, and the thickness of each surface can be the same or different; if the set thickness is too small, the acting force on the bare cell 2 in the formation process is too small, and the interface improvement effect is poor; if the set thickness is too large, the occupied space in the shell 1 is too large, and the energy density of the battery is affected;
specifically, the total thickness of the flexible bag 3 includes the sum of the thickness of the flexible bag and the thickness of the filler, and the total thickness of the battery is the thickness of the assembled bare cells 2 and the battery case 1. In the actual use process, the thickness expansion size and the group margin design of the pole piece can be adjusted to achieve the optimal effect.
In particular, the flexible pouch 3 is made of an insulating material, since it is required to be in contact with the bare cell 2 and the case 1, and in particular, the insulating material includes at least one of polyethylene, polypropylene, polyvinylidene fluoride, aramid, polyethylene terephthalate, polytetrafluoroethylene, polyacrylonitrile, polyimide, polyamide, polyester, and natural fiber.
According to the distribution condition of the bare cells 2 in the shell 1, the flexible bag 3 at least comprises the following two setting modes:
example 1
Referring to fig. 3, in this embodiment, a plurality of groups of bare cells 2 are disposed in the housing 1, the bare cells 2 together form a bare cell module, and the flexible bag 3 is disposed outside the bare cell module.
Example 2
Referring to fig. 4, in the present embodiment, a plurality of groups of bare cells 2 are disposed in the housing 1, and the flexible bag 3 is disposed between a plurality of adjacent groups of the bare cells 2 and the housing 1. The heat generated by the middle part of the bare cell is more, and expansion is easier to generate, so that the flexible bag is arranged between adjacent bare cells, acting force can be better applied to the bare cells, and the expansion is relieved.
To further verify the beneficial effects of the battery of the present utility model, three batteries were prepared according to the above-described examples 1 and 2, respectively, and a comparative experiment was performed using a conventional technique to prepare a general battery as a comparative example, specifically the experimental procedure was:
comparative example 1: square aluminium shell battery prepared by conventional silicon-carbon system; the negative electrode active material is a silicon-carbon material (the mass ratio of silicon carbon to conductive agent to binder is 96:2:2); the positive plate active substance is NCM ternary material (the mass ratio of NCM (nickel cobalt manganese), conductive agent and binder is 97:2:1); the diaphragm is a PE diaphragm with the thickness of 9 um; liPF with electrolyte 31 of 1mol/L 6 Mixed with EC/DMC/EMC (V/V=1:1:1); winding the positive and negative plates and the diaphragm into bare cells, welding the two bare cells in parallel, wrapping the Mylar film and the bottom support plate, and then placing the Mylar film and the bottom support plate in the shell 1;
experimental example 1: bare cell 2 was the same as comparative example 1; two bare cells 2 are placed in the flexible bag 3 after being welded in parallel, the flexible bag 3 is placed in the shell 1, the placement mode is shown as figure 3, the flexible bag 3 is arranged outside the bare cells 2, wherein: the thickness of the flexible bag 3 is calculated and designed to be 1.5mm; the sealing layer 32 of the flexible bag 3 is filled with the electrolyte 31, the composition of which is the same as that of the electrolyte in the battery, and the sealing layer 32 can resist the swelling force of 250kgf at maximum;
experimental example 2: bare cell 2 was the same as comparative example 1; the two bare cells 2 are welded in parallel and then placed in a flexible bag 3, the flexible bag 3 is placed in a shell 1, the placement mode is shown in fig. 4, the flexible bag 3 is arranged between a plurality of groups of adjacent bare cells 2 and between the bare cells 2 and the shell 1, wherein the thickness of the flexible bag 3 is calculated and designed to be 1.0mm; the sealing layer 32 of the flexible bag 3 is filled with the electrolyte 31, the composition of which is the same as that of the electrolyte in the battery, and the sealing layer 32 can resist the swelling force of 250kgf at maximum;
experimental example 3: bare cell 2 was the same as comparative example 1; the two bare cells 2 are welded in parallel and then placed in a flexible bag 3, the flexible bag 3 is placed in a shell 1, the placement mode is shown in fig. 4, the flexible bag 3 is arranged between a plurality of groups of adjacent bare cells 2 and between the bare cells 2 and the shell 1, wherein the thickness of the flexible bag 3 is calculated, the front surface is designed to be 1.0mm, the side surface is designed to be 0.5mm, and the bottom is designed to be 1.5mm; the sealing layer 32 of the flexible bag 3 is filled with the electrolyte 31 having the same composition as that of the electrolyte in the battery, and the sealing layer 32 can withstand an expansion force of 250kgf at maximum.
Welding the battery according to the conventional manufacturing procedure, filling liquid, forming, and fully disassembling and confirming an interface after capacity division: comparative example 1 has a large amount of black spots at the anode interface; the battery of this example had good interfaces and no black spots, and the beneficial effects of the battery of this example were apparent.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.
Claims (10)
1. A battery, comprising:
a housing;
the bare cell is arranged in the shell; and
the flexible bag is provided with a containing cavity, the bare cell is arranged in the containing cavity, and the flexible bag is coated on the outer side of the bare cell and isolates the bare cell from the shell; the flexible bag is provided with at least two layers of film structures, a sealing layer is formed in at least part of the area between the two adjacent layers of film structures, and gaseous substances or electrolyte is filled in the sealing layer.
2. The battery according to claim 1, wherein: the flexible bag has an opening from which the bare cell is placed into a receiving cavity of the flexible bag.
3. The battery according to claim 2, wherein: the shell is provided with an opening, and the opening of the flexible bag and the opening of the shell are correspondingly arranged on the same side.
4. The battery according to claim 1, wherein: when the expansion force born by the sealing layer is larger than the expansion force capable of being born, the sealing layer breaks to release electrolyte.
5. The battery according to claim 4, wherein: the sealing layer can bear an expansion force of 100kgf to 400kgf.
6. The battery according to claim 4, wherein: the sealing layer is formed by film structure hot-pressing encapsulation, and the encapsulation opening of the sealing layer has certain encapsulation width and encapsulation thickness.
7. The battery according to claim 1, wherein: the total thickness of the flexible bag is 2% -10% of the total thickness of the battery.
8. The battery according to claim 1, wherein: the flexible bag is made of an insulating material.
9. The battery according to claim 1, wherein: a plurality of groups of bare cells are arranged in the shell, and the flexible bag is arranged between the plurality of groups of bare cells and the shell.
10. The battery according to claim 1, wherein: the flexible bag is arranged between the bare cells adjacent to the bare cells and the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320122733.7U CN219419133U (en) | 2023-02-06 | 2023-02-06 | Battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320122733.7U CN219419133U (en) | 2023-02-06 | 2023-02-06 | Battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219419133U true CN219419133U (en) | 2023-07-25 |
Family
ID=87242146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320122733.7U Active CN219419133U (en) | 2023-02-06 | 2023-02-06 | Battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219419133U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116914277A (en) * | 2023-09-12 | 2023-10-20 | 厦门海辰储能科技股份有限公司 | Battery monomer, battery pack and power utilization device thereof |
-
2023
- 2023-02-06 CN CN202320122733.7U patent/CN219419133U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116914277A (en) * | 2023-09-12 | 2023-10-20 | 厦门海辰储能科技股份有限公司 | Battery monomer, battery pack and power utilization device thereof |
| CN116914277B (en) * | 2023-09-12 | 2024-01-26 | 厦门海辰储能科技股份有限公司 | Battery monomer, battery pack and power utilization device thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 68, Xin'anjiang Road, Southeast Street, Changshu City, Suzhou City, Jiangsu Province, 215000 Patentee after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Country or region after: China Address before: No. 68, Xin'anjiang Road, Southeast Street, Changshu City, Suzhou City, Jiangsu Province, 215000 Patentee before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |
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| CP03 | Change of name, title or address |