CN115425295A - Method for producing a battery and battery - Google Patents
Method for producing a battery and battery Download PDFInfo
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- CN115425295A CN115425295A CN202210971489.1A CN202210971489A CN115425295A CN 115425295 A CN115425295 A CN 115425295A CN 202210971489 A CN202210971489 A CN 202210971489A CN 115425295 A CN115425295 A CN 115425295A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 239000003292 glue Substances 0.000 claims abstract description 22
- 239000007774 positive electrode material Substances 0.000 claims abstract description 15
- 239000003792 electrolyte Substances 0.000 claims abstract description 13
- 238000011049 filling Methods 0.000 claims abstract description 12
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 239000007773 negative electrode material Substances 0.000 claims abstract description 8
- 238000002791 soaking Methods 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims abstract 2
- 238000004080 punching Methods 0.000 claims description 25
- 230000007704 transition Effects 0.000 claims description 25
- 238000005452 bending Methods 0.000 claims description 21
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 230000000750 progressive effect Effects 0.000 claims description 10
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 9
- 238000007493 shaping process Methods 0.000 claims description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 238000005530 etching Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910018626 Al(OH) Inorganic materials 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 2
- 238000007747 plating Methods 0.000 claims description 2
- 230000008961 swelling Effects 0.000 claims description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 229960001296 zinc oxide Drugs 0.000 description 4
- 238000003825 pressing Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 102000004310 Ion Channels Human genes 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920006335 epoxy glue Polymers 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 238000005213 imbibition Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 229910001947 lithium oxide Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical class [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical compound [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
- H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
-
- 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
-
- 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)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention provides a method for manufacturing a battery and a battery. The battery comprises a negative electrode cover and a positive electrode shell, wherein the positive electrode shell and the negative electrode cover are hermetically assembled through a sealing lantern ring between the positive electrode cover and the negative electrode cover; step 2) coating glue on the sealing sleeve ring in a soaking mode, and coating glue on the lower surface of the bottom of the bent part; sleeving the processed sealing sleeve on a negative electrode cover; step 3) performing punch forming on the sheet serving as the positive electrode shell; step 4), filling a positive electrode active material in the positive electrode shell and filling electrolyte in the positive electrode active material, and after the electrolyte is absorbed, placing a diaphragm above the positive electrode active material; step 5), filling a negative electrode active material in the negative electrode cover; and 6) combining the negative electrode cover and the positive electrode shell, and sealing and molding. The invention can simultaneously meet the requirements of excellent current discharge performance, high load voltage and good safety performance.
Description
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to a method for manufacturing a battery and the battery.
Background
The existing common small button disposable batteries generally comprise zinc/manganese dioxide series, zinc/silver oxide series and lithium/manganese dioxide series. The zinc/manganese dioxide series is suitable for large current discharge, and the zinc/silver oxide series and the lithium/manganese dioxide series are suitable for small current discharge.
Nowadays, small medical portable devices or wearable medical devices are increasingly popular, and these medical devices, especially those with automatic injection function, have very high performance requirements on batteries: the battery is required to have excellent high-current discharge performance, high load voltage and good safety performance. The only opportunities for the above three series of cells currently available are the zinc/manganese dioxide series.
At present, the zinc/manganese dioxide battery series on the market hardly simultaneously meet the requirements of excellent electrical property, high load voltage and good safety performance, the high electrical property, the high load voltage and the safety are opposite, more active substances or ion channels must be added into the battery to achieve the high electrical property and the high load voltage, after the active substances are added or the ion channels are better, the battery is in short circuit or over discharge when not used correctly, so that the gas generated in the battery is correspondingly increased, and the battery is easy to explode.
Therefore, there is a need to improve the prior art to meet the use requirements of high performance level of medical instruments (such as portable or wearable medical instruments, especially instruments with injection function), i.e. to meet the requirements of excellent current discharge performance, high load voltage and good safety performance at the same time.
Disclosure of Invention
The main object of the present invention is to provide a method for manufacturing a battery and a battery which can simultaneously satisfy the requirements of excellent current discharge performance, high load voltage, and good safety performance.
In order to achieve the above-described primary object, a first aspect of the present invention provides a method for manufacturing a battery including a negative-electrode cover and a positive-electrode can, the positive-electrode can and the negative-electrode cover being sealingly assembled with a sealing collar interposed therebetween, the method including the steps of:
step 1) punching a sheet material serving as a negative electrode cover by adopting a continuous multi-stage progressive punching mode;
the cathode cover is provided with a top wall and a side wall formed by downward extension of the outer peripheral edge of the top wall, and the side wall is provided with a bending part and a transition part used for connecting the top wall and the bending part; the transition part is provided with a first arc-shaped wall, a second arc-shaped wall and an inclined extension wall, the first arc-shaped wall is connected with the top wall, the second arc-shaped wall is connected with the bent inner wall, and the extension wall is connected with the first arc-shaped wall and the second arc-shaped wall;
step 2) coating glue on the sealing lantern ring in a soaking mode, and coating glue on the lower surface of the bottom of the bent part; sleeving the processed sealing sleeve on a negative electrode cover;
step 3) performing punch forming on a sheet serving as a positive electrode shell, wherein the positive electrode shell comprises a bottom wall and an outer annular wall formed by bending the outer peripheral edge of the bottom wall upwards;
step 4), filling a positive electrode active material in the positive electrode shell and filling electrolyte in the positive electrode active material, and after the electrolyte is absorbed, placing a diaphragm above the positive electrode active material;
step 5), filling a negative electrode active material in the negative electrode cover;
and 6) combining the negative electrode cover and the positive electrode shell, sealing and forming, wherein the upper part of the outer ring wall is contracted inwards along the radial direction of the outer ring wall so as to be closed and buckled on the side wall through a sealing sleeve ring, and the upper edge of the outer ring wall is buckled and pressed on the extension wall.
As another specific embodiment of the present invention, the continuous multi-stage progressive stamping process in step 1) is:
step 1.1) first stage punching: punching the sheet material into a cylindrical bowl shape to form a top wall in advance, and forming a primary transition R position at the joint of the upper part of the side wall and the top wall;
step 1.2) second stage punching: performing round shaping on the primary transition R position to form a secondary transition R position;
step 1.3) punching in the third stage: shaping and fixing the R position of the secondary transition to form a top wall, a first arc-shaped wall, an extension wall and a second arc-shaped wall;
the first arc-shaped wall, the extension wall and the second arc-shaped wall are sequentially connected to form a transition part which gradually extends towards the outer side and the lower side;
the top wall formed by the third stage punching has a third arc-shaped wall which is bent downwards along the outer periphery of the top wall, the first arc-shaped wall is connected with the third arc-shaped wall of the top wall, and the size of an arc R angle forming the third arc-shaped wall is smaller than that of an arc R angle forming the first arc-shaped wall and the second arc-shaped wall;
step 1.4) fourth stage punching: bending the lower part of the side wall outwards for multiple times to form a U-shaped bent inner wall and a bent outer wall, wherein the bent inner wall and the bent outer wall form a bent part, and the bent inner wall and the bent outer wall are attached to each other;
and step 1.5) ending and shaping the top of the bent part to form the negative electrode cover body.
As another embodiment of the present invention, the sheet material used as the negative electrode cover in step 1) is formed by compounding three or more layers of metals having good conductivity.
In another embodiment of the present invention, the extending wall is tangent to both the first and second curved walls such that the radial force applied to the sidewall is always directed toward the radial center of the sidewall when the sidewall is radially retracted into the seal.
In another embodiment of the present invention, the outer wall is flush with the inner wall, and the end section of the outer wall is in the shape of a horizontal cut.
In another embodiment of the present invention, when the outer diameter of the bottom wall is D1, the outer diameter of the top wall is D2, and the outer diameter of the seal at the upper portion of the outer ring wall is D3, the difference between D1 and D3 is 4 to 5cm, and the difference between D2 and D3 is 2 to 3cm.
As another embodiment of the present invention, the surface of the positive electrode case is treated in step 3) to form a nickel plated layer.
As another embodiment of the present invention, the positive active material in step 4) includes an electrolytic manganese dioxide plus graphite composite; the negative active material in the step 5) includesZinc powder, binder, imbibition expanding agent and corrosion additive, wherein the corrosion additive comprises In (OH) 2 、In 2 O 3 、Al(OH) 3 And Ti 2 O 3 。
As another embodiment of the present invention, the electrolyte in step 4) includes an aqueous KOH solution or an aqueous NaOH solution.
A second aspect of the invention is to provide a battery manufactured using the method as described above.
The invention has the following beneficial effects:
the battery has higher electrical property, high load voltage, large current discharge and safety explosion-proof function. Meanwhile, continuous production can be realized by the continuous multi-stage progressive stamping mode of the cathode cover, and the method has the advantages of high automation degree and high production efficiency.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic sectional view of example 1 of the present invention;
FIG. 2 is a flow chart of the punching of the negative electrode cover in example 1 of the present invention;
fig. 3 is a structural view of a negative electrode cap in example 1 of the present invention;
FIG. 4 is an enlarged schematic view of the side wall in embodiment 1 of the present invention;
fig. 5 is a combination view of the negative electrode cover and the sealing collar in example 1 of the present invention;
fig. 6 is a schematic view of the radial force applied to the sidewall in embodiment 1 of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein and, therefore, the scope of the present invention is not limited by the specific embodiments disclosed below.
Example 1
The present embodiment provides a method for manufacturing a battery, in particular a button cell battery as shown in fig. 1, comprising a negative electrode cover 10 and a positive electrode can 20, the positive electrode can 20 and the negative electrode cover 10 being sealingly assembled with a sealing collar 30 interposed therebetween. The method comprises the following steps:
step 1) punching a sheet material serving as the negative electrode cover 10 by adopting a continuous multi-stage progressive punching mode;
the negative electrode cover 10 has a top wall 11 and a side wall 12 formed by extending downward from the outer peripheral edge of the top wall 11, the side wall 12 has a bent portion 121 and a transition portion 122 for connecting the top wall 11 and the bent portion 121; the transition portion 122 has a first arc-shaped wall 1221, a second arc-shaped wall 1222, and an inclined extension wall 1223, the first arc-shaped wall 1221 being connected with the top wall 11, wherein a smaller third arc-shaped wall 111 may be formed at the junction of the top wall 11 and the first arc-shaped wall 1221 to make the junction more rounded.
The second arc-shaped wall 1222 is connected to the bent portion 121, and the extension wall 1223 is connected to the first arc-shaped wall 1221 and the second arc-shaped wall 1222;
the negative electrode cover 10 is formed by compounding three layers of metal or multiple layers of metal with good conductivity, the innermost layer is made of copper or silver metal material with good conductivity, and the highest cost performance is preferably selected as copper material; the middle layer is made of SUS stainless steel with strong antirust capacity and high steel strength, and SUS can be 3-headed stainless steel bodies such as 304 and 316 or 4-headed stainless steel bodies such as 430, 410 and 409; the outer layer is a nickel layer with strong corrosion resistance, and the excellent conductivity enables the heavy-current discharge and high load voltage of the battery to be realized.
Further, as shown in fig. 2, the continuous multi-stage progressive stamping process includes:
step 1.1) first-stage punching: punching the sheet material into a cylindrical bowl shape to form a top wall 11 in advance, and forming a primary transition R position at the joint of the upper part of the side wall 12 and the top wall 11, see working procedures a-b; at the moment, the cover surface of the semi-finished product is kept flat, and the cylindrical plane is in transition connection with the periphery through a primary transition R position.
Step 1.2) second stage punching: c, performing round shaping on the primary transition R position to form a secondary transition R position; . Wherein the secondary transition R-site is larger than the primary transition R-site to form the basis for subsequent ramp expansion.
Step 1.3) punching in the third stage: shaping the secondary transition R site to form the top wall 11, the first curved wall 1221, the extended wall 1223 and the second curved wall 1222, see process step d;
the first arc-shaped wall 1221, the extension wall 1223, and the second arc-shaped wall 1222 are sequentially connected to form a transition portion 122 extending gradually outward and downward;
the top wall 11 formed by the third stage punching has a third arc-shaped wall 111 bent downward along the outer circumference thereof, and the first arc-shaped wall 1221 is connected to the third arc-shaped wall 111 and forms an arc R angle of the third arc-shaped wall 111, which is preferably smaller than the arc R angles of the first arc-shaped wall 1221 and the second arc-shaped wall 1222;
preferably, the arc R angle of the first arc-shaped wall 1221 is the same size and opposite orientation as the arc R angle of the second arc-shaped wall 1222, specifically, the first arc-shaped wall 1221 faces outward and the second arc-shaped wall 1222 faces inward, as shown in fig. 4.
Specifically, the size of the inclination angle of the extended wall 1223 formed in the third stage is 45 ° or less, specifically, 36 °; at the same time, the extension wall 1223 is tangent to both the first and second curved walls 1221, 1222 so that when radially retracted into the seal, the sidewall 12 is subjected to radial forces all the way toward its radial center, as shown in fig. 6.
Step 1.4) fourth stage punching: bending the lower part of the side wall 12 outwards for a plurality of times to form a U-shaped bent inner wall 1211 and a bent outer wall 1212, see process e-g; the inner wall 1211 and the outer wall 1212 form a bending portion 121, and the inner wall 1211 and the outer wall 1212 are attached to each other.
For example, in the first bending, the bent outer wall 1212 is formed in a horizontal shape, see step e; during the second bending, the bent outer wall 1212 is folded up again by 25-45 degrees, preferably by 30 degrees, to form a V-shape, see process f; in the third bending, the bent outer wall 1212 is attached to the bent inner wall 1211, and no gap exists between the bent outer wall 1212 and the bent inner wall 1211, which is shown in the step g; in the three-time bending process, the sheet cannot yield too much during single bending, and the phenomenon that the sheet cracks at the bending position is avoided.
Further, the outer wall 1212 is flush with the inner wall 1211, and a distal end section 1213 of the outer wall 1212 has a horizontal cut-out shape.
Step 1.5) carries out ending and shaping on the top of the bent part 121, and in the process h, a negative electrode cover 10 body is formed, as shown in fig. 3.
The side wall 12 of the negative electrode cover 10 formed by the continuous multi-stage progressive stamping method in this embodiment is continuously retracted into the first arc-shaped wall 1221, the second arc-shaped wall 1222 and the inclined extension wall 1223, so that the radial force applied to the negative electrode cover 10 is effectively supported by the first arc-shaped wall 1221, the second arc-shaped wall 1222 and the inclined extension wall 1223, and the negative electrode cover 10 is not deformed by the radial force when the battery is radially retracted into the seal.
The above-described process may simultaneously perform the continuous multi-stage progressive punching operation of the plurality of negative electrode covers 10.
Step 2) coating glue on the sealing sleeve ring 30 in a soaking mode, and coating glue on the lower surface of the bottom of the bent part 121; the processed sealing collar 30 is sleeved on the negative electrode cover 10.
One optional operation is: the sealing lantern ring 30 is firstly cleaned by isopropanol or alcohol or absolute ethyl alcohol, and then soaked with glue after being dried, wherein the glue is alkali-resistant resin, AB component glue, epoxy glue, AD304 glue, hot-melt 304 glue and the like, and is diluted by environment-friendly solvent or light kerosene, soaked for 2-4 times, preferably 3 times, and finally dried in a ventilation cabinet, and the sealing glue is adhered to the inner surface and the outer surface of the sealing lantern ring 30.
Similarly, a layer of glue is printed on the lower surface of the bottom of the bending portion 121 in advance, and the glue is alkali-resistant resin, AB component glue, epoxy glue, AD304 glue, hot-melt 304 glue and the like and is diluted by an environment-friendly solvent or light kerosene.
Specifically, the inner wall of the sealing collar 30 is a plane top with a smaller circumferential inner diameter than a plane bottom Zhou Najing to form a circumferential retaining ring, and the negative electrode cover 10 is tightly buckled after being sleeved with the sealing ring to prevent the negative electrode cover 10 from being separated from the sealing collar 30 in the battery assembling process.
Finally, the seal collar 30 soaked with the glue is placed in a fixed clamp hole, and the cathode cover 10 printed with the glue is aligned through a mechanical clamp to complete the assembly of the seal collar 30, so that the joint of the cathode cover 10 and the seal collar 30 is fully and effectively filled with the glue, as shown in fig. 5.
Step 3) performing punch forming on a sheet material serving as the positive electrode shell 20, wherein the positive electrode shell 20 comprises a bottom wall 21 and an outer annular wall 22 formed by bending the outer peripheral edge of the bottom wall 21 upwards; meanwhile, the surface of the positive electrode can 20 is treated to form a nickel plating layer, so that the positive electrode can 20 has a bright surface and has a strong corrosion resistance.
Specifically, a cold-rolled iron sheet or SUS stainless steel sheet may be used as the sheet of the positive electrode can 20.
Wherein, the outer diameter of the bottom wall 21 is D1, the outer diameter of the top wall 11 (including the third arc-shaped wall 111) is D2, and the outer diameter of the seal at the upper part of the outer ring wall is D3, the difference value between D1 and D3 is 4-5cm, and the difference value between D2 and D3 is 2-3 cm. In this embodiment, by limiting the outer diameter, the sealing line can be effectively ensured to form a tight fastening effect.
And 4) filling the positive electrode shell 20 with the positive electrode active material 40 and filling the positive electrode active material 40 with electrolyte, wherein the electrolyte comprises KOH aqueous solution or NaOH aqueous solution, and after the absorption of the electrolyte is finished, placing the diaphragm 50 above the positive electrode active material 40.
The positive electrode active material 40 is preferably an electrolytic manganese dioxide plus graphite assembly.
Step 5), filling a negative electrode active material 60 in the negative electrode cover 10; the negative active material 60 includes zinc powder, a binder, a imbibition swelling agent, and an etching additive, wherein the etching additive specifically includes In (OH) 2 、In 2 O 3 、Al(OH) 3 And Ti 2 O 3 。
Specifically, the above-mentioned negative active material 60 needs to be reprocessed according to the circumstances, for example, when a zinc paste negative electrode is used, an electrolyte is added to the above-mentioned negative formulation material and stirred uniformly, the electrolyte is an aqueous solution of KOH or NaOH; for another example, zinc powder negative electrode, the above negative electrode formulation materials need to be stirred uniformly.
And 6) combining and pressing the negative electrode cover 10 and the positive electrode shell 20, putting the combined and pressed negative electrode cover and the positive electrode shell into a radially-retracted mould, pressing the top wall 11 and the bottom wall 21 by using a push rod with a spring on a plane, increasing the height for limiting to prevent over-pressing, further applying a thrust piezoelectric cell into an inner cavity of the mould, and sealing and forming.
Wherein, after the seal is formed, the upper part of the outer annular wall 22 is shrunk inwards along the radial direction to be tightly buckled on the side wall 12 through the sealing sleeve ring 30, and the upper edge of the outer annular wall 22 is buckled and pressed on the extension wall 1223.
In terms of unfolding, in the manufacturing method, the battery is retracted into the tightest sealing position in the radial direction and is positioned at the tail end (top end) section of the bent outer wall 1212, the height difference is formed between the tail end section of the bent outer wall 1212 and the bottom thereof, and by utilizing the height difference, the internal pressure of the battery at the sealing position is consistent, when the battery is subjected to improper use or short circuit, the negative electrode cover 10 is stressed due to air expansion in the battery, at the moment, the part higher than the tail end of the bent outer wall 1212 is firstly stressed outwards and is preferentially inclined towards one side under the action of extrusion outward force, the upper edge of the outer ring wall 22 of the outer seal is extruded outwards to form one or more cracks, after the cracks are formed, the gas in the battery preferentially leaks outwards through the cracks, and the explosion-proof force is not formed after the gas in the battery leaks outwards, so that the safety effect is achieved.
In this embodiment, continuous production can be realized by the continuous multi-stage progressive stamping method of the negative electrode cover 10, and the method has the advantages of high automation degree and high production efficiency. The battery manufactured by the method has higher electrical property, high load voltage, large current discharge and safe explosion-proof function.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that changes may be made without departing from the scope of the invention, and it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
Claims (10)
1. A method for manufacturing a battery comprising a negative-electrode cover and a positive-electrode can, the positive-electrode can and the negative-electrode cover being sealingly assembled with a sealing collar therebetween, characterized in that: the method comprises the following steps:
step 1) punching a sheet material serving as a negative electrode cover by adopting a continuous multi-stage progressive punching mode;
the cathode cover is provided with a top wall and a side wall formed by downward extension of the outer peripheral edge of the top wall, and the side wall is provided with a bending part and a transition part used for connecting the top wall and the bending part; the transition part is provided with a first arc-shaped wall, a second arc-shaped wall and an inclined extension wall, the first arc-shaped wall is connected with the top wall, the second arc-shaped wall is connected with the bent inner wall, and the extension wall is connected with the first arc-shaped wall and the second arc-shaped wall;
step 2) coating glue on the sealing lantern ring in a soaking mode, and coating glue on the lower surface of the bottom of the bent part; sleeving the processed sealing sleeve on the negative electrode cover;
step 3) performing punch forming on the sheet serving as the positive electrode shell; the positive electrode shell comprises a bottom wall and an outer ring wall formed by bending the outer peripheral edge of the bottom wall upwards;
step 4), filling a positive electrode active material in the positive electrode shell and filling electrolyte in the positive electrode active material, and after the electrolyte is absorbed, placing a diaphragm above the positive electrode active material;
step 5), filling a negative electrode active material in the negative electrode cover;
and 6) combining the negative electrode cover and the positive electrode shell, sealing and molding, wherein the upper part of the outer ring wall is radially and inwardly shrunk to be tightly buckled on the side wall through the sealing sleeve ring, and the upper edge of the outer ring wall is buckled and pressed on the extension wall.
2. The method for manufacturing a battery according to claim 1, wherein: the continuous multi-stage progressive stamping process in the step 1) comprises the following steps:
step 1.1) first-stage punching: stamping a sheet material into a cylindrical bowl shape to obtain a primary forming top wall, and forming a primary transition R position at the joint of the upper part of the side wall and the primary forming top wall;
step 1.2) second stage punching: performing round shaping on the primary transition R position to form a secondary transition R position;
step 1.3) third stage punching: shaping and fixing the R position of the secondary transition to form a top wall, a first arc-shaped wall, an extension wall and a second arc-shaped wall;
the first arc-shaped wall, the extension wall and the second arc-shaped wall are sequentially connected to form a transition part which gradually extends towards the outer side and the lower side;
the top wall formed by the third stage punching has a third arc-shaped wall which is bent downwards along the outer periphery of the top wall, the first arc-shaped wall is connected with the third arc-shaped wall of the top wall, and the size of the R angle of the arc forming the third arc-shaped wall is smaller than that of the R angle of the arc forming the first arc-shaped wall and the second arc-shaped wall;
step 1.4) fourth stage punching: bending the lower part of the side wall outwards for multiple times to form a U-shaped bent inner wall and a bent outer wall, wherein the bent inner wall and the bent outer wall form the bent part, and the bent inner wall and the bent outer wall are attached to each other;
and 1.5) ending and shaping the top of the bent part to form the negative electrode cover body.
3. The method for manufacturing a battery according to claim 1, wherein: the sheet material used as the cathode cover in the step 1) is formed by compounding three or more layers of metals with good conductivity.
4. The method for manufacturing a battery according to claim 1, wherein: the extension wall, the first arc-shaped wall and the second arc-shaped wall are tangent, so that when the side wall is radially retracted into the seal, the radial force borne by the side wall always faces to the radial center of the side wall.
5. The method for manufacturing a battery according to claim 1, wherein: the outer wall of bending with the inner wall of bending is parallel and level, just the terminal tangent plane of the outer wall of bending is horizontal cut form.
6. The method for manufacturing a battery according to claim 1, wherein: the outer diameter of the bottom wall is D1, the outer diameter of the top wall is D2, the outer diameter of the seal at the upper part of the outer ring wall is D3, the difference value between D1 and D3 is 4-5cm, and the difference value between D2 and D3 is 2-3 cm.
7. The method for manufacturing a battery according to claim 1, wherein: and 3) treating the surface of the positive electrode shell in the step 3) to form a nickel plating layer.
8. The method for manufacturing a battery according to claim 1, wherein: the positive active material in the step 4) comprises an electrolytic manganese dioxide and graphite assembly; the negative active material in the step 5) comprises zinc powder, a binder, a liquid-absorbing swelling agent andetching additiveWherein the etching additive comprises In (OH) 2 、In 2 O 3 、Al(OH) 3 And Ti 2 O 3 。
9. The method for manufacturing a battery according to claim 1, wherein: the electrolyte in the step 4) comprises KOH aqueous solution or NaOH aqueous solution.
10. A battery manufactured by the method of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210971489.1A CN115425295A (en) | 2022-08-12 | 2022-08-12 | Method for producing a battery and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210971489.1A CN115425295A (en) | 2022-08-12 | 2022-08-12 | Method for producing a battery and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115425295A true CN115425295A (en) | 2022-12-02 |
Family
ID=84198970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210971489.1A Pending CN115425295A (en) | 2022-08-12 | 2022-08-12 | Method for producing a battery and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115425295A (en) |
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2022
- 2022-08-12 CN CN202210971489.1A patent/CN115425295A/en active Pending
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