CN218939968U - Liquid structure is annotated in encapsulation of soft packet of electric core - Google Patents
Liquid structure is annotated in encapsulation of soft packet of electric core Download PDFInfo
- Publication number
- CN218939968U CN218939968U CN202223102293.3U CN202223102293U CN218939968U CN 218939968 U CN218939968 U CN 218939968U CN 202223102293 U CN202223102293 U CN 202223102293U CN 218939968 U CN218939968 U CN 218939968U
- Authority
- CN
- China
- Prior art keywords
- electrolyte
- soft
- cavity
- packaging
- battery cell
- 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.)
- Active
Links
Images
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
- Filling, Topping-Up Batteries (AREA)
Abstract
The utility model provides a packaging liquid injection structure of a soft package battery core, which comprises a packaging bag; the inside of the packaging bag is provided with a core bag and an air bag area; the air bag area is provided with an electrolyte accommodating cavity; and a weakening component is arranged on the electrolyte accommodating cavity. According to the utility model, the electrolyte containing cavity is arranged at the air bag area, so that a novel liquid injection mode of the soft-package battery cell is provided, namely, the liquid injection is extruded in the soft package, the contact between the electrolyte and air is isolated, the process of injecting the liquid into the battery cell is simplified, and the production cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of packaging and liquid injection processes of soft-package battery cells, and relates to a soft-package battery cell packaging and liquid injection structure.
Background
The liquid injection step of the lithium ion battery core with the existing soft package structure comprises the following steps: weighing before liquid injection, recording weight data, and uploading the weight data to a system; a certain amount of electrolyte is poured into the opening of the cell; weighing after liquid injection, recording weight data, and uploading the weight data to a system; standing in vacuum to enable electrolyte to quickly infiltrate into the core bag; sealing the air bag to prevent the electrolyte from flowing out; standing at normal temperature to fully infiltrate the electrolyte into the core bag.
However, the following problems are not solved based on the existing liquid injection technology:
the existing technology is easy to cause the appearance pollution of the battery cell and needs to be additionally protected. In the process of cell liquid injection and transportation, a small amount of liquid is inevitably splashed and overflowed to corrode the surface of the aluminum plastic film, so that the appearance is poor, and scrapping treatment is required under severe conditions.
In addition, the liquid injection precision in the prior art is greatly influenced by equipment capacity and equipment reliability, and comprises weighing system precision, liquid injection pump metering precision and precision holding capacity under the conditions of long-time operation, abnormal shutdown or model change and the like. When the fluctuation of the liquid injection precision is large, the consistency of the electrical performance is affected.
Therefore, the liquid injection process with easily controlled liquid injection precision, simplicity and convenience is a technical problem to be solved in the field of soft package cell manufacturing processes.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a soft-package battery cell and a packaging liquid injection structure thereof, and provides a liquid injection mode of the soft-package battery cell, namely extrusion liquid injection in the soft package, which isolates the contact of the electrolyte and air, simplifies the working procedure of liquid injection of the battery cell and reduces the production cost by arranging an electrolyte containing cavity at an air bag area.
To achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a soft package battery cell packaging liquid injection structure, which comprises a packaging bag; the inside of the packaging bag is provided with a core bag and an air bag area;
the air bag area is provided with an electrolyte accommodating cavity;
and a weakening component is arranged on the electrolyte accommodating cavity.
Preferably, the electrolyte accommodating cavity is an electrolyte corrosion resistant cavity.
Preferably, the electrolyte accommodating cavity is a Polypropylene (PP) cavity or a polyester resin (Polyethylene terephthalate, PET) cavity.
Preferably, the wall thickness of the electrolyte accommodating cavity is 0.02-3 mm.
Preferably, the weakening component is arranged on one side of the electrolyte accommodating cavity, which faces the battery core.
Preferably, the weakening member comprises a plurality of score lines arranged along the length direction of the electrolyte receiving cavity.
Preferably, the width of each score line is 0.2-3 mm, and the length of each score line is 0.5-8 mm.
Preferably, the quality of the electrolyte in the electrolyte accommodating cavity is consistent with the injection quality of the soft-package battery cell.
Preferably, the packaging bag comprises an aluminum plastic film packaging bag.
Preferably, the electrolyte accommodating cavity is cylindrical.
Preferably, the cross section of the electrolyte accommodating cavity is circular or elliptical.
By the technical scheme, the utility model has the following beneficial effects:
according to the utility model, the electrolyte accommodating cavity is arranged at the air bag area, the weakening part is arranged on the electrolyte accommodating cavity, when pressure is applied to the weakening part on the electrolyte accommodating cavity, the weakening part is broken, electrolyte flows out of the electrolyte accommodating cavity and gradually diffuses and fills the whole soft-package battery cell, so that extrusion type liquid injection is realized, the contact between the electrolyte and air is isolated, the process of liquid injection of the battery cell is simplified, and the production cost is reduced; moreover, the injection precision and the injection consistency of the electrolyte can be improved.
Drawings
Fig. 1 is a schematic structural diagram of a liquid injection structure for packaging a soft package battery cell.
Fig. 2 is a schematic diagram of a soft package cell liquid injection process provided by the utility model.
Wherein:
the electrolyte cell comprises a 1-packaging bag, a 2-core bag, a 3-air bag area, a 4-electrolyte accommodating cavity, a 5-sealing area, a 6-cell top, a 7-cell bottom, an 8-pressurizing direction and a 9-electrolyte flow direction.
Detailed Description
It is to be understood that in the description of the present utility model, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present utility model.
It should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.
The utility model provides a soft package battery cell packaging liquid injection structure, which comprises a packaging bag; the inside of the packaging bag is provided with a core bag and an air bag area;
the air bag area is provided with an electrolyte accommodating cavity;
and a weakening component is arranged on the electrolyte accommodating cavity.
According to the utility model, the electrolyte accommodating cavity is arranged at the air bag area, the weakening part is arranged on the electrolyte accommodating cavity, when pressure is applied to the weakening part on the electrolyte accommodating cavity, the weakening part is broken, electrolyte flows out of the electrolyte accommodating cavity and gradually diffuses and fills the whole soft-package battery cell, so that extrusion type liquid injection is realized, the contact between the electrolyte and air is isolated, the process of liquid injection of the battery cell is simplified, and the production cost is reduced; moreover, the injection precision and the injection consistency of the electrolyte can be improved.
As a preferable scheme provided by the utility model, the electrolyte containing cavity is obtained by the following method:
after electrolyte is filled in the opened electrolyte filling cavity, the electrolyte filling cavity is sealed and separated into independent electrolyte containing cavities in a heat sealing or ultrasonic wave compound mode, two ends of the electrolyte containing cavities are sealing areas, and the sealing areas are jointly packaged with the top, the bottom and the packaging bags of the soft package battery cell.
In one embodiment, the electrolyte receiving cavity is an electrolyte corrosion resistant cavity.
In one embodiment, the electrolyte receiving cavity comprises a PP cavity or a PET cavity.
In one embodiment, the wall thickness of the electrolyte-containing cavity is 0.02-3 mm, for example, 0.02mm, 0.05mm, 0.1mm, 1mm, 2mm or 3mm, but not limited to the recited values, and other non-recited values within the range of values are equally applicable.
In one embodiment, the attenuation member is disposed on a side of the electrolyte receiving cavity facing the core pack.
When setting up and weakening the position at one side of electrolyte holding cavity towards the core package and break, the electrolyte that flows out from electrolyte holding cavity flows to the core package at first, directly infiltrates the positive negative pole in the core package, has realized annotating the liquid fast, along with the outflow of more electrolyte, the electrolyte diffusion gradually fills whole soft packet core package to annotate liquid efficiency has been improved.
In one embodiment, the attenuation member includes a plurality of score lines disposed along a length of the electrolyte receiving cavity.
In one embodiment, the width of each score line is 0.2-3 mm, for example, 0.2mm, 0.5mm, 1mm, 1.5mm, 2mm or 3mm, but not limited to the recited values, and other non-recited values within the range of values are equally applicable.
In one embodiment, the length of each score line is 0.5-8 mm, for example, 0.5mm, 1mm, 2mm, 5mm, 7mm or 8mm, but is not limited to the recited values, and other non-recited values within the range of values are equally applicable.
In one embodiment, the electrolyte in the electrolyte containing cavity has a mass consistent with the filling mass of the soft-packaged battery cell.
The quality of the electrolyte in the electrolyte accommodating cavity is the liquid injection quantity required by the soft-package battery cell, the liquid injection quantity can be measured by taking the quality of the electrolyte in the electrolyte accommodating cavity as a detection item in the battery preparation process, and the liquid injection quantity is stable and controllable and is not influenced by the precision and the reliability of equipment, so that the stability and the reliability of the liquid injection precision are improved, and the consistency of the battery cell is improved.
In one embodiment, the packaging bag is an aluminum plastic film packaging bag.
In one embodiment, the electrolyte receiving cavity is cylindrical.
In one embodiment, the electrolyte receiving cavity has a circular or oval cross-section.
The utility model provides a packaging and liquid injection process of the soft package battery cell packaging and liquid injection structure, which comprises the following steps:
(1) After the electrolyte accommodating cavity is arranged in the air bag area, the electrolyte accommodating cavity and the core bag are packaged together;
(2) And applying pressure to the air sac area to weaken the rupture of the part, and injecting liquid to complete the packaging liquid injection process.
The packaging and liquid injection process is different from the process of injecting liquid with an open outside in the prior art, and then packaging, wherein the electrolyte containing cavity filled with the electrolyte is firstly packaged with the battery cell, then the electrolyte containing cavity is broken in a manner of external force extrusion, and the electrolyte is released from the electrolyte containing cavity, flows out and wets the inside of the whole battery cell, so that the liquid injection is completed.
The packaging and liquid injection process simplifies the investment of liquid injection equipment, reduces the field use of production space, greatly reduces the production operation and construction costs, simultaneously does not need to additionally protect the appearance of the battery cell, and cancels the use of the PET protective film. In addition, the liquid injection precision is independent of the equipment precision and reliability, and is stable and controllable, so that the consistency of the battery cells is improved.
The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.
Example 1
The embodiment provides a packaging and liquid injection structure of a soft-package battery cell and a packaging and liquid injection process thereof.
The packaging and liquid injection structure (figure 1) comprises a packaging bag 1; the inside of the packaging bag 1 is provided with a core bag 2 and an air bag area 3, and the air bag area 3 is provided with an electrolyte accommodating cavity 4. The packaging bag 1 is an aluminum plastic film, and the electrolyte accommodating cavity 4 is cylindrical and has a circular cross section. Electrolyte holding cavity 4 is soft cavity, and the material is PP (chinese petrochemical industry, P8101), and the wall thickness is 1.5mm, be provided with the part that weakens on the electrolyte holding cavity 4, the part that weakens sets up in one side of electrolyte holding cavity 4 towards core package 2, the part that weakens is a plurality of dividing lines that set up along the length direction of electrolyte holding cavity 4, every dividing line's length is 4mm, width is 1.5mm. Electrolyte is arranged in the electrolyte accommodating cavity 4, and the quality of the electrolyte is consistent with the injection quality of the soft-package battery cell.
As shown in fig. 2, the pressure is applied to the air bag area 3, the weakening member breaks under the pressure extrusion according to the direction 8, and the electrolyte in the electrolyte accommodating cavity 4 flows to the battery cell according to the direction 9, so that the process of extruding and injecting the electrolyte in the soft package is realized.
Example 2
The embodiment provides a packaging and liquid injection structure of a soft-package battery cell and a packaging and liquid injection process thereof.
The packaging and liquid injection structure (figure 1) comprises a packaging bag 1; the inside of the packaging bag 1 is provided with a core bag 2 and an air bag area 3, and the air bag area 3 is provided with an electrolyte accommodating cavity 4. The packaging bag 1 is an aluminum plastic film, and the electrolyte accommodating cavity 4 is cylindrical and has a circular cross section. Electrolyte holding cavity 4 is soft cavity, and the material is PET (rich plastic, FR 530), and the wall thickness is 0.02mm, be provided with the part that weakens on the electrolyte holding cavity 4, the part that weakens sets up in one side that electrolyte holding cavity 4 is towards core package 2, weaken the part for a plurality of dividing lines that set up along the length direction of electrolyte holding cavity 4, every dividing line's length is 0.5mm, width is 0.2mm. Electrolyte is arranged in the electrolyte accommodating cavity 4, and the quality of the electrolyte is consistent with the injection quality of the soft-package battery cell.
As shown in fig. 2, the pressure is applied to the air bag area 3, the weakening member breaks under the pressure extrusion according to the direction 8, and the electrolyte in the electrolyte accommodating cavity 4 flows to the battery cell according to the direction 9, so that the process of extruding and injecting the electrolyte in the soft package is realized.
Example 3
The embodiment provides a packaging and liquid injection structure of a soft-package battery cell and a packaging and liquid injection process thereof.
The packaging and liquid injection structure (figure 1) comprises a packaging bag 1; the inside of the packaging bag 1 is provided with a core bag 2 and an air bag area 3, and the air bag area 3 is provided with an electrolyte accommodating cavity 4. The packaging bag 1 is an aluminum plastic film, and the electrolyte accommodating cavity 4 is cylindrical and has a circular cross section. Electrolyte holding cavity 4 is soft cavity, and the material is PP (chinese petrochemical industry, P8101), and the wall thickness is 3mm, be provided with the part that weakens on the electrolyte holding cavity 4, the part that weakens sets up in one side of electrolyte holding cavity 4 towards core package 2, the part that weakens is a plurality of dividing lines that set up along the length direction of electrolyte holding cavity 4, every dividing line's length is 8mm, width is 3mm. Electrolyte is arranged in the electrolyte accommodating cavity 4, and the quality of the electrolyte is consistent with the injection quality of the soft-package battery cell.
As shown in fig. 2, the pressure is applied to the air bag area 3, the weakening member breaks under the pressure extrusion according to the direction 8, and the electrolyte in the electrolyte accommodating cavity 4 flows to the battery cell according to the direction 9, so that the process of extruding and injecting the electrolyte in the soft package is realized.
Example 4
The embodiment provides a packaging liquid injection structure of a soft-package battery cell and a packaging liquid injection process thereof, which are different from embodiment 1 only in that the wall thickness of an electrolyte accommodating cavity is 0.015mm.
In this embodiment, the wall thickness is less than 0.02mm, and the sealability of the electrolyte accommodating cavity is reduced, which is easy to cause leakage of the electrolyte.
Example 5
The embodiment provides a packaging liquid injection structure of a soft-package battery cell and a packaging liquid injection process thereof, which are different from embodiment 1 only in that the wall thickness of an electrolyte accommodating cavity is 3.2mm.
In this embodiment, the wall thickness is greater than 3mm, the flexibility of electrolyte holding cavity reduces, still has more electrolyte to remain in the cavity after the extrusion action, can't get into inside the electric core, influences the notes liquid effect.
Typically + -0.5 g is an acceptable precision of priming.
Comparative example 1
The comparative example provides a packaging liquid injection structure of a soft package battery core and a packaging liquid injection process thereof.
The difference between the packaging liquid injection structure and the embodiment 1 is that the air bag area has no electrolyte containing cavity.
The packaging and liquid injection process comprises the following steps:
(1) Weighing before liquid injection, recording weight data, and uploading the weight data to a system;
(2) A certain amount of electrolyte is poured into the opening of the cell;
(3) Weighing after liquid injection, recording weight data, and uploading the weight data to a system;
(4) Standing in vacuum to enable electrolyte to quickly infiltrate into the core bag;
(5) Sealing the air bag to prevent the electrolyte from flowing out;
(6) Standing at normal temperature to fully infiltrate the electrolyte into the core bag.
The appearance of the cell in this comparative example was easily contaminated and additional protection was required. In the process of cell liquid injection and transportation, a small amount of liquid is inevitably splashed and overflowed to corrode the surface of the aluminum plastic film, so that the appearance is poor, and scrapping treatment is required under severe conditions.
The liquid injection precision in the comparative example is greatly influenced by the equipment capability and the equipment reliability, and comprises the precision of a weighing system, the metering precision of a liquid injection pump and the precision maintaining capability under the conditions of long-time operation, abnormal shutdown, mold change and the like.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and it should be apparent to those skilled in the art that any changes or substitutions that fall within the technical scope of the present utility model disclosed herein are within the scope of the present utility model.
Claims (10)
1. The packaging and liquid injection structure of the soft package battery core is characterized by comprising a packaging bag; the inside of the packaging bag is provided with a core bag and an air bag area;
the air bag area is provided with an electrolyte accommodating cavity;
and a weakening component is arranged on the electrolyte accommodating cavity.
2. The package electrolyte injection structure of the soft-package battery cell of claim 1, wherein the electrolyte containing cavity is an electrolyte corrosion resistant cavity.
3. The packaging and liquid injecting structure of the soft-packaged battery cell according to claim 1, wherein the electrolyte accommodating cavity is a PP cavity or a PET cavity.
4. The packaging and liquid injecting structure of the soft-packaged battery cell according to claim 1, wherein the wall thickness of the electrolyte accommodating cavity is 0.02-3 mm.
5. The encapsulated electrolyte fill structure of claim 1 wherein said attenuation member is disposed on a side of said electrolyte receiving cavity facing said core pack.
6. The encapsulated electrolyte fill structure of claim 1 wherein the attenuation member comprises a plurality of score lines disposed along a length of the electrolyte receiving cavity.
7. The package liquid injection structure of the soft package battery cell according to claim 6, wherein the width of each scribing line is 0.2-3 mm; the length of each scribing line is 0.5-8 mm.
8. The encapsulated electrolyte injection structure of the soft-packaged battery cell according to claim 1, wherein the mass of the electrolyte in the electrolyte accommodating cavity is consistent with the injection mass of the soft-packaged battery cell.
9. The encapsulated electrolyte injection structure of a soft-pack cell of claim 1, wherein the electrolyte receiving cavity is cylindrical.
10. The encapsulated electrolyte injection structure of a soft-pack cell of claim 1, wherein the electrolyte receiving cavity has a circular or oval cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223102293.3U CN218939968U (en) | 2022-11-22 | 2022-11-22 | Liquid structure is annotated in encapsulation of soft packet of electric core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223102293.3U CN218939968U (en) | 2022-11-22 | 2022-11-22 | Liquid structure is annotated in encapsulation of soft packet of electric core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218939968U true CN218939968U (en) | 2023-04-28 |
Family
ID=86092448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223102293.3U Active CN218939968U (en) | 2022-11-22 | 2022-11-22 | Liquid structure is annotated in encapsulation of soft packet of electric core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218939968U (en) |
-
2022
- 2022-11-22 CN CN202223102293.3U patent/CN218939968U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7417720B2 (en) | Batteries, battery modules, battery packs and electric vehicles | |
| CN111162307B (en) | Lithium ion battery capable of inhibiting corrosion of aluminum plastic film of soft-packaged battery and production process of lithium ion battery | |
| KR20200029940A (en) | Battery module with enhanced cooling efficiency and Battery pack comprising the same | |
| CN113363555A (en) | Lithium ion battery for improving leakage failure of soft package battery and packaging process thereof | |
| JP2001273884A (en) | Sealed type battery and manufacturing method thereof | |
| CN115566243A (en) | Soft package electric core group capable of sharing electrolyte and large-capacity battery | |
| CN218939968U (en) | Liquid structure is annotated in encapsulation of soft packet of electric core | |
| CN111509286B (en) | Battery core and battery | |
| CN110085901B (en) | Battery cell | |
| CN115911786A (en) | Liquid injection process of soft package battery cell | |
| CN217641558U (en) | Edgeless cylindrical battery structure | |
| CN210006851U (en) | horizontal lead-acid battery with filler | |
| CN111653721B (en) | Battery roll core and battery | |
| CN102005617A (en) | Lithium-dynamic battery capable of avoiding gas inflation | |
| CN203386855U (en) | Gas bag bracket for flexibly-packed lithium ion cell | |
| CN110690406A (en) | Packaging liquid injection method for improving pole piece infiltration and side edge deformation of soft package winding battery | |
| CN220710605U (en) | Liquid-retaining piece and soft-package battery core | |
| CN207529999U (en) | A kind of battery and mobile terminal | |
| CN112448074A (en) | Bipolar battery stack | |
| CN220821726U (en) | Top cover assembly of sodium ion battery | |
| CN211957700U (en) | Lithium ion battery capable of refilling liquid | |
| CN220604900U (en) | Soft package battery air pocket and soft package battery | |
| CN219393460U (en) | Single cell of high-voltage lithium ion battery | |
| CN114388870B (en) | Soft packet of battery monomer and soft packet of battery module | |
| CN220439811U (en) | Square lithium ion battery with explosion-proof function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |