CN109659490A - Button cell cathode of lithium molding equipment and forming method - Google Patents
Button cell cathode of lithium molding equipment and forming method Download PDFInfo
- Publication number
- CN109659490A CN109659490A CN201910010866.3A CN201910010866A CN109659490A CN 109659490 A CN109659490 A CN 109659490A CN 201910010866 A CN201910010866 A CN 201910010866A CN 109659490 A CN109659490 A CN 109659490A
- Authority
- CN
- China
- Prior art keywords
- lithium
- cathode
- button cell
- squeeze board
- lithium metal
- 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.)
- Granted
Links
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 97
- 238000000465 moulding Methods 0.000 title claims abstract description 40
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000009467 reduction Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000000994 depressogenic effect Effects 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000005096 rolling process Methods 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000011572 manganese Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- RRMGGYGDQCMPKP-UHFFFAOYSA-N gold lithium Chemical compound [Li].[Au] RRMGGYGDQCMPKP-UHFFFAOYSA-N 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 3
- 229910008088 Li-Mn Inorganic materials 0.000 description 2
- 229910006327 Li—Mn Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- KLARSDUHONHPRF-UHFFFAOYSA-N [Li].[Mn] Chemical compound [Li].[Mn] KLARSDUHONHPRF-UHFFFAOYSA-N 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0433—Molding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/06—Electrodes for primary cells
- H01M4/08—Processes of manufacture
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Primary Cells (AREA)
Abstract
Button cell cathode of lithium molding equipment and forming method of the present invention, button cell cathode of lithium molding equipment, including contoured squeeze board and driving part, driving part driving contoured squeeze board moves up and down, and the center of the head end of contoured squeeze board has a located cavity coincideing with cathode of lithium shape after molding；Cathode top is placed in placing platform, and the lithium metal piece after reduction is placed on to the central area of the bottom cover on cathode top；Then driving part driving contoured squeeze board presses to lithium metal on piece, and lithium metal piece is located in the located cavity of contoured squeeze board；Contoured squeeze board continues to suppress to the bottom cover on cathode top, lithium metal piece be rolled in the consistent shape of located cavity, and bind on the bottom cover on cathode top；Lithium metal piece has preferable rolling property and ductility, and when contoured squeeze board applies pressure to lithium metal piece, lithium metal sector-meeting is extended and diffused in located cavity, by presetting the volume and shape of located cavity, that is, can guarantee shape of the lithium metal piece in cathode top.
Description
Technical field
The present invention relates to a kind of lithium manganese button cell field, more particularly, to a kind of button cell cathode of lithium molding equipment and
Forming method.
Background technique
Li-Mn button cell is to battery leak resistance and electrical property requirement with higher.Li-Mn button cell includes anode
Cup, cathode top, sealing ring, lithium metal, positive cake, diaphragm and electrolyte, pass through between positive cake and cathode of lithium (lithium metal piece)
Diaphragm separates, and is insulated between positive cup and cathode top by sealing ring.
The structure of li-Mn button cell is as shown in Figure 1, specific production technology are as follows: lithium gold is sequentially placed into cathode top
Category, diaphragm, electrolyte, positive cake and positive cup, then carry out bending processing to positive cup, will be close using the upper edge of positive cup
Seal bending simultaneously encases cathode top, to complete the assembling of li-Mn button cell.
Traditional battery cathode of lithium forming method: the cuboid lithium metal piece of certain thickness, width will is put into cathode top
Center, then thin rounded flakes are pressed by operated pressing tool and are laid in top surface.If lithium metal piece is when being put into cathode top, lithium gold
Belong to position to shift without on the centre bit of cathode top, then when lithium metal piece is pressed into thin slice, just it is easy to appear
Deviation；This will lead to following consequence: 1, the sealing ring on cathode top will be covered and squeezes deviation (such as Fig. 2), after battery seal molding,
The sealing ring of deviation influences whether the leak resistance of button cell；2, because of lithium metal piece deviation, meeting shape at lithium metal piece deviation
At a sheared edge, when diaphragm pours cathode top, it is easy that diaphragm is made to be crushed (see Fig. 3), causes battery short circuit.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of novel button cell cathode of lithium molding equipments, after molding
Cathode of lithium be located at the center on cathode top, the leak resistance and electrical property of battery can be improved；A kind of benefit is further provided
With the forming method of the molding equipment.
The technical scheme of the invention to solve the technical problem is: button cell cathode of lithium molding equipment, special
Sign is to include contoured squeeze board and driving part, and the driving part driving contoured squeeze board moves up and down, molding pressure
The center of the head end of head has a located cavity coincideing with cathode of lithium shape after molding.
The further preferred embodiment of the present invention are as follows: the periphery of the head end is equipped with the ring for being raised in central area forward
Shape rib, to be centrally formed the located cavity in head end.
The further preferred embodiment of the present invention are as follows: the located cavity is in rounded shape, the depth of the located cavity
For 0.4-0.8mm, the diameter of located cavity is 15-18mm.
The further preferred embodiment of the present invention are as follows: horizontal bottom surface at least part region of the located cavity is equipped with
Deceleration lines；The deceleration lines can delay the speed flowed outward after lithium material is repressed.
The further preferred embodiment of the present invention are as follows: the deceleration lines is multiple convex ribs for being raised in horizontal bottom surface,
Or the multiple grooves for being depressed in horizontal bottom surface of deceleration lines.
The further preferred embodiment of the present invention are as follows: the distribution trend of the deceleration lines is the horizontal base from located cavity
The inside for radially extending to the annular rib on surface.
The further preferred embodiment of the present invention are as follows: the width of convex ribs or groove is 0.5-1.2mm, the height of convex ribs or groove
For 0.5-1.2mm.
The further preferred embodiment of the present invention are as follows: the driving part is motor or oil cylinder.
The further preferred embodiment of the present invention are as follows: further include one for putting the placing platform on cathode top.
The further preferred embodiment of the present invention are as follows: the diameter of the contoured squeeze board is less than the diameter of the bottom cover on cathode top,
So that contoured squeeze board can act on the bottom cover on cathode top.
Another theme: the forming method of button cell cathode of lithium molding equipment, it is characterised in that include the following steps: 1) to bear
Pole top is placed in placing platform, and the rectangular lithium metal piece after reduction is placed on to the central area of the bottom cover on cathode top；2)
Driving part driving contoured squeeze board presses to lithium metal on piece, and lithium metal piece is located in the located cavity of contoured squeeze board；Molding
Pressure head continues to suppress to the bottom cover on cathode top, the lithium metal piece be rolled in the consistent shape of located cavity, and stick
It closes on the bottom cover on cathode top.
Compared with prior art, it is an advantage of the invention that the center of the head end of contoured squeeze board have one with it is after molding
The located cavity that cathode of lithium shape is coincide, contoured squeeze board push block-like lithium metal piece, lithium metal are rolled into recessed with positioning
The consistent shape of chamber, as long as setting contoured squeeze board in the position on cathode top, so that it may avoid lithium metal piece after molding from occurring inclined
The case where position, leakage and short circuit problem after preventing button cell from assembling.
Lithium metal piece has preferable rolling property and ductility, when contoured squeeze board applies pressure to lithium metal piece, lithium gold
Belong to sector-meeting to extend and diffuse in located cavity, by presetting the volume and shape of located cavity, that is, can guarantee that lithium metal piece exists
Shape in cathode top.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of li-Mn button cell in the prior art；
Fig. 2 is the schematic diagram that sealing ring is squeezed deviation by lithium metal in the prior art；
Fig. 3 is the schematic diagram that lithium metal piece deviation forms sheared edge in the prior art；
Fig. 4 is that lithium metal piece is placed in the structural schematic diagram in the bottom cover of cathode top；
Fig. 5 is the state one when button cell cathode of lithium molding equipment rolls lithium metal piece；
Fig. 6 is the state two when button cell cathode of lithium molding equipment rolls lithium metal piece；
Fig. 7 is the structural schematic diagram that lithium metal piece is rolled cathode top after molding.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
The structure of li-Mn button cell is as shown in Figure 1, specific production technology are as follows: lithium gold is sequentially placed into cathode top 1
Belong to piece 20, diaphragm 53, electrolyte, positive cake 51 and positive cup 52, bending processing then is carried out to positive cup 52, utilizes positive cup
52 upper edge is by 54 bending of sealing ring and encases cathode top 1, to complete the assembling of li-Mn button cell.The present invention is mainly right
The molding equipment in processing cathode top and forming method are described in detail:
Those of ordinary skill in the art are easy to know, commonly used in the hardness of the lithium metal of cell negative electrode material
0.6HV, which is able to illustrate in the present embodiment that documented lithium metal material is softer, and has preferable ductility；Work as quilt
When weight is suppressed, lithium metal can be extended out easily.This explanation to the button cell cathode of lithium hereafter to be elaborated at
Type equipment and forming method have more important meaning.
As shown in Figures 4 to 7, button cell cathode of lithium molding equipment, including contoured squeeze board 10 and driving part, driving portion
Part driving contoured squeeze board 10 moves up and down, and the center of the head end of contoured squeeze board 10 has one and cathode of lithium shape after molding
The located cavity 11 coincideing.
As shown in Figure 5 and Figure 6, have outside one and cathode of lithium after molding for the center of the head end of contoured squeeze board 10
For the located cavity 11 that shape is coincide, lithium metal piece 20 is placed in located cavity 11 by the producer；Contoured squeeze board 10 pushes
Block-like lithium metal piece 20, by lithium metal be rolled into the consistent shape of located cavity 11, exist as long as setting contoured squeeze board 10
The position on cathode top 1, so that it may avoid lithium metal piece 20 after molding from the case where deviation occur, the leakage after preventing button cell from assembling
Liquid and short circuit problem.
As shown in fig. 7, lithium metal piece 20 has preferable rolling property and ductility, when contoured squeeze board 10 is to lithium metal piece 20
When applying pressure, lithium metal piece 20 can extend and diffuse in located cavity 11, by the volume and shape of presetting located cavity 11
Shape can guarantee shape of the lithium metal piece 20 in cathode top 1, by controlling position of the contoured squeeze board 10 in cathode top 1, from
And position of the located cavity 11 in cathode top 1 is controlled, as long as pushing lithium metal piece 20, that is, it can guarantee the lithium metal piece after rolling
20 in located cavity 11.
Specifically, the periphery of the head end of contoured squeeze board 10 is equipped with the annular rib 12 for being raised in central area forward,
To be centrally formed located cavity 11 in head end.Annular rib 12 can prevent spilling positioning outside the lithium metal piece 20 being rolled recessed
Chamber 11, to ensure that lithium metal material is in located cavity 11.
Located cavity 11 is in rounded shape, and the depth of located cavity 11 is 0.4-0.8mm, and the diameter of located cavity 11 is 15-
18mm。
The horizontal bottom surface of located cavity 11 be equipped with deceleration lines 13, for the deceleration lines 13 primarily to
Delay the speed flowed outward after reason material is repressed.
Preferably, deceleration lines 13 can equably be covered in the horizontal bottom surface of located cavity 11, can also be fixed
Deceleration lines 13 is arranged in the partial region of the horizontal bottom surface of position cavity 11, can be adjusted according to the actual needs with this producer
The speed flowed outward after jointed material is repressed.
Preferably, deceleration lines 13 is multiple convex ribs for being raised in horizontal bottom surface, and certain deceleration lines 13 can also be with
It is multiple grooves for being depressed in horizontal bottom surface, the producer can go to consider the line that will slow down according to the convenient angle of actual processing
Road 13 is arranged to convex ribs or groove, naturally it is also possible to which convex ribs or groove are used in combination.The down force pressure of contoured squeeze board 10 is substantially
It is 0.8-1.2 tons, is preferable over 1 ton.
It is formed by pressure with weight above-mentioned in the present embodiment to act on lithium metal piece 20, lithium metal piece 20 shows one
The characteristic of kind fluid, can uniformly, fully be extended in the region defined by located cavity 11；And the present embodiment converges
Total deceleration lines 13 can control the excessive speed of solid 20 fluid of lithium metal piece, to ensure that lithium metal piece 20 is being under pressure
When do not spill over region defined by located cavity 11.Lithium metal piece 20 can prolong snugly uniform, abundant and not excessively
In located cavity 11, above-mentioned technical effect is just embodying being illustrated for the present embodiment button cell cathode of lithium molding equipment for exhibition
Creative main points.
If deceleration lines 13 is only arranged in the partial region of the horizontal bottom surface in located cavity 11, preferably, slow down
The distribution trend of lines 13 is from the inside for radially extending to annular rib 12 of the horizontal bottom surface of located cavity 11.
It is 0.5-1.2mm as the convex ribs of deceleration lines 12 or the width of groove, the height of convex ribs or groove is 0.5-
1.2mm。
It is motor or oil cylinder with driving part in the present embodiment.
Button cell cathode of lithium molding equipment further includes one for putting the placing platform on cathode top 1.It needs to cathode top 1
When being processed, cathode top 1 is placed in placing platform, so that subsequent contoured squeeze board 10 is to the lithium metal in cathode top 1
Piece 20 carries out compression process.
The diameter of contoured squeeze board 10 is less than the diameter of the bottom cover 2 on cathode top 1, so that contoured squeeze board 10 can act on cathode top
On 1 bottom cover 2.
As shown in Figures 4 to 7, the forming method of button cell cathode of lithium molding equipment includes the following steps: 1) cathode top
1 is placed in placing platform, and the rectangular lithium metal piece 20 after reduction is placed on to the central area of the bottom cover 2 on cathode top 1；2)
Driving part driving contoured squeeze board 10 presses on lithium metal piece 20, and lithium metal piece 20 is located at the located cavity of contoured squeeze board 10
In 11；Contoured squeeze board 10 continues to suppress to the bottom cover 2 on cathode top, and lithium metal piece 20 is rolled in consistent with located cavity 11
Shape, and bind on the bottom cover 2 on cathode top 1.
Button cell cathode of lithium molding equipment provided by the present invention and forming method are described in detail above, this
Apply that a specific example illustrates the principle and implementation of the invention in text, the explanation of above example is only intended to
Help understands the present invention and core concept.It should be pointed out that for those skilled in the art, not departing from this
, can be with several improvements and modifications are made to the present invention under the premise of inventive principle, these improvement and modification also fall into the present invention
In scope of protection of the claims.
Claims (10)
1. button cell cathode of lithium molding equipment, it is characterised in that including contoured squeeze board and driving part, the driving part
The driving contoured squeeze board moves up and down, and the center of the head end of contoured squeeze board has one and cathode of lithium shape after molding
The located cavity coincideing.
2. button cell cathode of lithium molding equipment according to claim 1, it is characterised in that the periphery of the head end
Equipped with the annular rib for being raised in central area forward, to be centrally formed the located cavity in head end.
3. button cell cathode of lithium molding equipment according to claim 2, it is characterised in that the located cavity is in circle
Shape, the depth of the located cavity are 0.4-0.8mm, and the diameter of located cavity is 15-18mm.
4. button cell cathode of lithium molding equipment according to claim 1, it is characterised in that the water of the located cavity
Flat bottom surface at least part region is equipped with deceleration lines；Flowing outward after the deceleration lines can delay lithium material repressed
Speed.
5. button cell cathode of lithium molding equipment according to claim 4, it is characterised in that the deceleration lines is more
A convex ribs for being raised in horizontal bottom surface or the multiple grooves for being depressed in horizontal bottom surface of the deceleration lines.
6. button cell cathode of lithium molding equipment according to claim 4, it is characterised in that point of the deceleration lines
Cloth trend is from the inside for radially extending to the annular rib of the horizontal bottom surface of located cavity.
7. button cell cathode of lithium molding equipment according to claim 5, it is characterised in that the width of convex ribs or groove is
The height of 0.5-1.2mm, convex ribs or groove is 0.5-1.2mm.
8. button cell cathode of lithium molding equipment according to claim 1, it is characterised in that further include one negative for putting
The placing platform on pole top.
9. button cell cathode of lithium molding equipment according to claim 1, it is characterised in that the contoured squeeze board it is straight
Diameter is less than the diameter of the bottom cover on cathode top, so that contoured squeeze board can act on the bottom cover on cathode top.
10. the forming method of -9 any button cell cathode of lithium molding equipments according to claim 1, it is characterised in that packet
Include following steps: 1) cathode top is placed in placing platform, and the rectangular lithium metal piece after reduction is placed on to the bottom on cathode top
The central area of lid；2) driving part driving contoured squeeze board presses to lithium metal on piece, and lithium metal piece is located at contoured squeeze board
In located cavity；Contoured squeeze board continues to suppress to the bottom cover on cathode top, and the lithium metal piece, which is rolled, is in and located cavity
Consistent shape, and bind on the bottom cover on cathode top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910010866.3A CN109659490B (en) | 2019-01-07 | 2019-01-07 | Button cell lithium negative electrode forming equipment and forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910010866.3A CN109659490B (en) | 2019-01-07 | 2019-01-07 | Button cell lithium negative electrode forming equipment and forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109659490A true CN109659490A (en) | 2019-04-19 |
| CN109659490B CN109659490B (en) | 2024-03-26 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910010866.3A Active CN109659490B (en) | 2019-01-07 | 2019-01-07 | Button cell lithium negative electrode forming equipment and forming method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112958734A (en) * | 2021-02-03 | 2021-06-15 | 大连交通大学 | Preparation method and application of two-dimensional metal lithium |
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