CN115275536A - Cover plate for isolating thermal runaway battery injection and manufacturing method thereof - Google Patents
Cover plate for isolating thermal runaway battery injection and manufacturing method thereof Download PDFInfo
- Publication number
- CN115275536A CN115275536A CN202210872248.1A CN202210872248A CN115275536A CN 115275536 A CN115275536 A CN 115275536A CN 202210872248 A CN202210872248 A CN 202210872248A CN 115275536 A CN115275536 A CN 115275536A
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- China
- Prior art keywords
- cover plate
- thermal runaway
- window
- base plate
- window cover
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000002347 injection Methods 0.000 title abstract description 6
- 239000007924 injection Substances 0.000 title abstract description 6
- 238000002955 isolation Methods 0.000 claims abstract description 29
- 239000007921 spray Substances 0.000 claims abstract description 15
- 238000004080 punching Methods 0.000 claims abstract description 10
- 238000003698 laser cutting Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 239000000758 substrate Substances 0.000 abstract description 5
- 238000005507 spraying Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
Images
Classifications
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
- B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/082—Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
- B23K26/382—Removing material by boring or cutting by boring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/591—Covers
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
-
- 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
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a cover plate for isolating thermal runaway battery injection and a manufacturing method thereof, wherein the isolation cover plate is formed by splicing a base plate and a window cover plate, and the base plate and the window cover plate are connected by adopting a pinhole dotted line; the manufacturing method comprises the steps of primary accurate punching and secondary accurate punching; according to the battery cell protection device provided by the invention, the isolation cover plate is formed by splicing the base plate and the window cover plate, and the base plate and the window cover plate are connected by adopting a pinhole dotted line; when the battery core is sprayed, the window cover plate is pushed open by the spray, so that smooth spraying is realized, and the spray falls on the isolation cover plate, so that secondary damage to the battery core is avoided; the manufacturing method provided by the invention can realize that the error of the aperture at different thicknesses is within a certain range, and ensure the smoothness of tearing between the window cover plate and the substrate.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to a cover plate for isolating thermal runaway battery injection and a manufacturing method thereof.
Background
The electric cores are arranged together to form an electric core bundle for supplying energy together. In order to realize insulation of the battery cell, a layer of insulation plate covers the sides of the positive electrode and the negative electrode of the battery cell. However, once the battery core fails, high-temperature liquid may be sprayed from the inside of the battery core, and at this time, the insulation plate may prevent the high-temperature liquid from being sprayed. When the existing cutting process of the isolation cover plate is used for laser drilling, the farther distance from a laser head is often caused by insufficient energy, so that the hole diameter of a hole at the farther position from the laser head is smaller. If the power of laser drilling is increased, the laser drilling with different thickness of the aperture is actually different. When the difference is large, the use performance of the product is affected.
Disclosure of Invention
The present invention is directed to a cover plate for isolating thermal runaway battery spray and a method for manufacturing the same, which solves the above-mentioned problems of the related art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a apron for keeping apart thermal runaway battery sprays, keep apart the apron and splice mutually by base plate and window apron, base plate and window apron adopt pinhole dotted line to connect.
As a preferable embodiment of the present invention, the shape of the window cover may be circular, oval, square, rectangular, or rhombic.
As a preferable technical scheme of the invention, the isolation cover plate is made of mica materials, and the thickness of the isolation cover plate is 0.5-3mm.
In a preferred embodiment of the present invention, the number of the connection points between the base plate and the window cover plate is 1 to 15.
The invention also provides a manufacturing method of the cover plate for isolating thermal runaway battery injection, which comprises the following steps:
step one, an isolation cover plate is flatly laid on a workbench, a laser cutting device moves under a program set by a computer control system, and first-time accurate punching is carried out on the isolation cover plate;
secondly, the punching scanning speed of the laser cutting device is 1.3-2.5m/min, and the number of connection points between the base plate and the window cover plate is 1-15; the pulse width is 15-25nm, the energy of the laser is 15-20J, and the pulse frequency is 1.5kHz-5.5kHz;
and thirdly, turning over the isolation cover plate and then flatly paving the isolation cover plate on the workbench, moving the laser cutting device under a program set by a computer control system, and carrying out secondary accurate punching on the isolation cover plate.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the battery cell protection device provided by the invention, the isolation cover plate is formed by splicing the base plate and the window cover plate, and the base plate and the window cover plate are connected by adopting a pinhole dotted line. When the electric core erupts, the eruption thing backs up the window apron and opens, realizes eruption smoothly, and the eruption thing falls on the isolation apron moreover, can not cause the secondary damage to the electric core.
2. The manufacturing method provided by the invention can realize that the error of the aperture at different thicknesses is within a certain range, and ensure the tearing smoothness between the window cover plate and the substrate.
Drawings
FIG. 1 is a schematic view of a cover plate for isolating thermal runaway battery spray, wherein the base plate is a one-piece flat plate and the window cover plate is rectangular in shape;
FIG. 2 is a schematic view of a cover plate for isolating thermal runaway battery spray, wherein the base plate is a one-piece flat plate and the window cover plate is circular in shape;
FIG. 3 is a schematic view of a cover plate for isolating thermal runaway battery spray, wherein the base plate is a one-piece flat plate and the window cover plate is diamond-shaped;
FIG. 4 is a schematic structural diagram of a cover plate for isolating thermal runaway battery spray, wherein clamping plates are symmetrically arranged on a base plate of the cover plate, and a window cover plate is rectangular in shape;
FIG. 5 is a schematic structural diagram of a cover plate for isolating thermal runaway battery spray, in which snap-gauge plates are symmetrically arranged on a base plate and a window cover plate is circular;
FIG. 6 is a schematic diagram of a cover plate for isolating thermal runaway battery spray, wherein clamping plates are symmetrically arranged on a base plate of the cover plate, and a window cover plate is diamond-shaped.
In the figure: 1. a substrate; 2. window apron.
Detailed Description
In order to make the technical solutions in the embodiments of the present application better understood, the technical solutions in the embodiments of the present application will be described below clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict, and the present application will be described in detail with reference to fig. 1 to 6 in conjunction with the embodiments.
Example 1
As shown in fig. 1-3, a cover plate for isolating thermal runaway battery spray is formed by splicing a base plate 1 and a window cover plate 2, wherein the base plate 1 and the window cover plate 2 are connected by a pinhole dotted line.
As shown in fig. 1-3, the base plate may be a one-piece flat plate, in this embodiment, the shape of the window cover 2 may be a circle, a rectangle or a diamond, and in other embodiments, the shape of the window cover 2 may also be an ellipse, a square, other polygons or irregular shape.
The isolation cover plate is made of mica material, and the thickness of the isolation cover plate is any one value of 0.5-3mm, for example, as follows: the thickness of the isolation cover plate is 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm or 3.0mm.
The number of connection points between the base plate 1 and the window covering 2 is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 or 15.
In this embodiment: according to the battery cell protection device provided by the invention, the isolation cover plate is formed by splicing the base plate 1 and the window cover plate 2, and the base plate 1 and the window cover plate 2 are connected by adopting a pinhole dotted line. When the electric core erupts, the eruption thing backs up window apron 2 and opens, realizes eruption smoothly, and the eruption thing falls on keeping apart the apron moreover, can not cause the secondary damage to the electric core. The thickness of the isolation cover plate is 0.5-3mm, and the insulation cover plate with the thickness within the range has good insulation effect and mechanical strength, and the insulation cover plate within the thickness range cannot be damaged even if the insulation cover plate faces the battery core. And secondly, the thickness of the insulating cover plate is limited not to exceed 3mm, the total weight of the battery cell bundle can be controlled, and further the production cost and the transportation cost are effectively reduced.
Example 2
As shown in fig. 4 to 6, based on embodiment 1, the substrate is symmetrically provided with a pair of clamping plates, and the clamping plates are clamped at two sides of the battery cell. The clamping plates are symmetrically arranged on the base plate, so that the stability degree of the base plate covering the battery core can be improved by clamping the clamping plates on two sides of the battery core.
Example 3
The embodiment provides a manufacturing method of a cover plate for isolating thermal runaway battery injection, and the manufacturing method is applied to preparing the isolating cover plate provided by embodiment 1 or embodiment 2. The isolation cover plate is flatly laid on the workbench, the laser cutting device moves under a program set by a computer control system, and the isolation cover plate is precisely punched for the first time;
secondly, the punching scanning speed of the laser cutting device is 1.3-2.5m/min, and the number of connection points between the substrate 1 and the window cover plate 2 is 1-15; the pulse width is 15nm-25nm, the energy of the laser is 15J-20J, and the pulse frequency is 1.5kHz-5.5kHz;
and step three, turning over the isolation cover plate and then flatly paving the isolation cover plate on the workbench, moving the laser cutting device under a program set by the computer control system, and precisely punching the isolation cover plate for the second time.
The technical effects of the embodiment are as follows: the invention provides a laser cutting method, and the laser cutting method can be used for turning over, so that holes can be drilled on the front side and the back side of the same position once, the hole diameters of the drilled holes at different depths are the same, and the tearing effect is better. When can effectively prevent that electric core from erupting, the condition that window apron 2 can not tear down takes place.
The above embodiments are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equally replaced or changed within the scope of the present invention.
Claims (5)
1. The cover plate for isolating the jet of the thermal runaway battery is characterized in that the isolation cover plate is formed by splicing a base plate (1) and a window cover plate (2), and the base plate (1) and the window cover plate (2) are connected by adopting a pinhole dotted line.
2. The cover plate for insulating thermal runaway battery spray according to claim 1, characterised in that the shape of the window cover plate (2) may be circular, oval, square, rectangular or diamond.
3. The cover plate for isolating thermal runaway battery spray of claim 1, wherein the isolating cover plate is made of mica material and has a thickness of 0.5-3mm.
4. The cover plate for insulating thermal runaway battery spray according to claim 1, characterised in that the number of connection points between the base plate (1) and the window cover plate (2) is 1-15.
5. A method of manufacturing a cover plate for insulating thermal runaway battery spray, the method comprising the steps of:
the method comprises the following steps that firstly, an isolation cover plate is flatly laid on a workbench, a laser cutting device moves under a program set by a computer control system, and first-time accurate punching is carried out on the isolation cover plate;
step two, the punching scanning speed of the laser cutting device is 1.3-2.5m/min, and the number of connection points between the base plate (1) and the window cover plate (2) is 1-15; the pulse width is 15nm-25nm, the energy of the laser is 15J-20J, and the pulse frequency is 1.5kHz-5.5kHz;
and step three, turning over the isolation cover plate and then flatly paving the isolation cover plate on the workbench, moving the laser cutting device under a program set by the computer control system, and precisely punching the isolation cover plate for the second time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210872248.1A CN115275536A (en) | 2022-07-20 | 2022-07-20 | Cover plate for isolating thermal runaway battery injection and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210872248.1A CN115275536A (en) | 2022-07-20 | 2022-07-20 | Cover plate for isolating thermal runaway battery injection and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115275536A true CN115275536A (en) | 2022-11-01 |
Family
ID=83768077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210872248.1A Pending CN115275536A (en) | 2022-07-20 | 2022-07-20 | Cover plate for isolating thermal runaway battery injection and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115275536A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005093679A (en) * | 2003-09-17 | 2005-04-07 | Sumitomo Heavy Ind Ltd | Laser machining method and device |
| CN208904109U (en) * | 2018-11-07 | 2019-05-24 | 固德电材系统（苏州）股份有限公司 | A kind of battery pack isolating device and battery pack |
| CN210535738U (en) * | 2019-10-31 | 2020-05-15 | 上海蔚来汽车有限公司 | Heat insulation assembly of battery module |
| CN211605225U (en) * | 2020-02-17 | 2020-09-29 | 固德电材系统（苏州）股份有限公司 | Thermal runaway prevents diffusion equipment, battery module and vehicle for battery module |
| CN114094240A (en) * | 2021-09-29 | 2022-02-25 | 岚图汽车科技有限公司 | Design method of battery and battery |
| CN114273800A (en) * | 2021-12-17 | 2022-04-05 | 北京赢圣科技有限公司 | Ultrafast laser drilling method and system suitable for stainless steel workpiece |
| WO2022143131A1 (en) * | 2020-12-29 | 2022-07-07 | 长城汽车股份有限公司 | Battery module and vehicle provided with same |
-
2022
- 2022-07-20 CN CN202210872248.1A patent/CN115275536A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005093679A (en) * | 2003-09-17 | 2005-04-07 | Sumitomo Heavy Ind Ltd | Laser machining method and device |
| CN208904109U (en) * | 2018-11-07 | 2019-05-24 | 固德电材系统（苏州）股份有限公司 | A kind of battery pack isolating device and battery pack |
| CN210535738U (en) * | 2019-10-31 | 2020-05-15 | 上海蔚来汽车有限公司 | Heat insulation assembly of battery module |
| CN211605225U (en) * | 2020-02-17 | 2020-09-29 | 固德电材系统（苏州）股份有限公司 | Thermal runaway prevents diffusion equipment, battery module and vehicle for battery module |
| WO2022143131A1 (en) * | 2020-12-29 | 2022-07-07 | 长城汽车股份有限公司 | Battery module and vehicle provided with same |
| CN114094240A (en) * | 2021-09-29 | 2022-02-25 | 岚图汽车科技有限公司 | Design method of battery and battery |
| CN114273800A (en) * | 2021-12-17 | 2022-04-05 | 北京赢圣科技有限公司 | Ultrafast laser drilling method and system suitable for stainless steel workpiece |
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Application publication date: 20221101 |
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