CN1371140A - Square battery - Google Patents
Square battery Download PDFInfo
- Publication number
- CN1371140A CN1371140A CN02104663A CN02104663A CN1371140A CN 1371140 A CN1371140 A CN 1371140A CN 02104663 A CN02104663 A CN 02104663A CN 02104663 A CN02104663 A CN 02104663A CN 1371140 A CN1371140 A CN 1371140A
- Authority
- CN
- China
- Prior art keywords
- battery case
- recess
- rectangular cell
- battery
- metal pattern
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 66
- 239000002184 metal Substances 0.000 claims description 66
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000003475 lamination Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000004804 winding Methods 0.000 abstract 1
- 210000004027 cell Anatomy 0.000 description 52
- 238000010586 diagram Methods 0.000 description 13
- 239000000284 extract Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 239000011149 active material Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000002931 mesocarbon microbead Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 239000011255 nonaqueous electrolyte Substances 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 210000000352 storage cell Anatomy 0.000 description 1
- 230000008719 thickening 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
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a square battery whose can side surface expands little at the time of recharging. This square battery storing battery elements layering a positive electrode and a negative electrode through a separator or flat battery elements winding the positive electrode and the negative electrode around them through the separator has a recessed part connecting an inclined surface with no step difference and a flat part at least one an end part on the bottom surface side of a battery can at least on either one surface of the battery can side surface in parallel with a layered surface or a flat surface of the battery elements.
Description
Technical field
The present invention relates to rectangular cell, particularly about being contained in the rectangular cell shell by the cell device that dividing plate is made positive pole and negative pole face-off and coiling and carrying out airtight rectangular cell, in more detail, be airtight shape rectangular cell about lithium ion battery etc.
Background technology
As the power supply of miniature electric machine, use various batteries.As the power supply of portable phone, notebook computer, bar code device (カ system コ one ダ) etc., use the battery with nonaqueous electrolyte of the lithium rechargeable battery etc. of small-sized, jumbo airtight shape battery.The structure that this battery with nonaqueous electrolyte uses has cylindrical shape, square.
In the lithium ion battery that uses as the miniature electric machine power, the structure of employing is, on positive electrode collector and negative electrode collector, apply active material respectively after, dividing plate is contained between the two, with its coiling and hold, be enclosed in the battery case.
The battery compartment that the machine of use battery generally has cube shaped as the battery that is contained in such battery compartment, for cylindrical battery, exists invalid capacious problem.Further, the diameter of cylinder battery is restricted because of the thickness of battery accommodating part, therefore, in small-sized or slim machine, the flat column rectangular cell that used thickness is thin.
In such battery, exist when battery charge, discharge, along with the variation of the material that uses as active material, the problem that the thickness of electrode of battery changes.
For example, in the lithium ion battery, when charging lithium be injected in the crystal lattice of the active material of negative electrode, therefore, produced the expansion of negative electrode active material.
Be in the rectangular cell of outer packaging container with the metallic battery case, the expansion of positive active material, negative electrode active material can make the thickness of the active material of anode electrode or negative electrode increase, and will expand inevitably in the side of battery case.
If the battery case dilation increases, not only can produce the problems such as installation difficulty of battery on the machine that uses battery, and, prepare the space, thereby also can bring problem such as idle space increase owing to will expect pre-expansion.
For cadmium-nickel storage cell etc., record battery distortion when preventing initial activity, will adorn the prismatic sealed type battery that concavity is done in side that the generating element of shell contacts outward with battery.
For example, the battery of in Japanese kokai publication sho 62-126566 communique, putting down in writing, after the alternately laminated pole plate group who obtains is contained in the electric groove by dividing plate with positive plate and negative plate, at stacked direction electric groove is carried out punch process, work as end plate with electric groove itself, the pole plate group evenly and is closely oppressed together.
In addition, open the prismatic sealed battery of putting down in writing in the flat 7-183010 communique the spy, outside square on the dress shell, with side that the end plate of generating element contact on be pre-formed recess, the generating element insertion is formed with in the outer dress shell of recess.
Fig. 6 is in order to prevent the battery case key diagram of the distortion of battery case in the past, is the key diagram that the spy opens the cell manufacturing method that flat 7-183010 communique put down in writing.
Fig. 6 (A) is the perspective view that is used to illustrate battery case.Be formed with recess 3 on the side 2 of battery case 1, by forming recess earlier, under situation about cell device being contained in the battery case, the end plate of cell device, be that the electrode of tabular a plurality of electrodes end when stacked remains on formation because of recess to the outstanding part in inside, thereby the problem that the curved face part that the bottom of the battery lead plate of long side surface the inside forms the battery case bottom is collapsed has obtained solution.
The formation of recess 3 on the shell wall face of battery case is the former metal pattern that has recess in the internal configurations of battery case, have the formpiston metal pattern of protuberance and undertaken from the exterior arrangement of battery case by drawing, yet, in the little small-sized or flat square battery shell of battery case A/F 4, forming by drawing is unusual difficulty.
That is to say, the perspective view of the former metal pattern shown in Fig. 6 (B) is such, configuration has the former metal pattern 5 of recess in battery case, carry out drawing from the outside formpiston metal pattern that has the convex shaped part corresponding that uses of battery case with the concavity portion 6 of former metal pattern, but, after drawing, being positioned at former, to extract the wall portion 8 of former metal pattern of direction 7 rightabout positions inner outstanding to battery case because of the formation of the recess on the side 23.Therefore, extracting of former metal pattern is very difficult.When extracting by force, can produce damage, perhaps cause the battery case distortion in the inside of battery case.
Metal pattern as the battery case inside of packing into; may be partitioned into a plurality of metal patterns by use; the method that can consider to cut apart metal pattern and take out; but; in the little battery of A/F 4; when use is divided into a plurality of metal patterns as metal pattern, because aspects such as metal pattern mechanical strength in fact are impossible implement.
Summary of the invention
The invention provides a kind of rectangular cell, this rectangular cell accommodates the flat cell device that makes cell device that anode electrode and negative electrode be laminated or by dividing plate anode electrode and negative electrode are reeled and made by dividing plate, is provided with the recess that does not have step at least in the end of battery case bottom surface side at least one face of the lamination surface of cell device or the battery case side parallel with flat horizontal surface.
Above-mentioned rectangular cell is provided with step in the end of battery case peristome one side of recess.
Above-mentioned rectangular cell is provided with the thinner wall section of splitting by the increase of internal pressure on the top of the recess that is arranged at the side.
In the above-mentioned rectangular cell, recess is provided with a plurality of.
In the above-mentioned rectangular cell, be provided with a plurality of recesses in direction towards the battery case opening.
The present invention also provides a kind of manufacture method of rectangular cell, above-mentioned rectangular cell be accommodate by dividing plate make cell device that anode electrode and negative electrode be laminated or by dividing plate with the reel rectangular cell of the flat cell device made of anode electrode and negative electrode, wherein, battery case side with respect to the flat horizontal surface that is parallel to cell device, be configured in battery case side and battery case bottom side and be provided with the former metal pattern of unlimited recess, and configuration is from the outside of battery case and the chimeric formpiston metal pattern of recess of former metal pattern, carry out drawing, form recess thus, this recess has the inclined plane that does not have step at least in the end of battery case bottom surface.
Owing to form and not have the inclined plane of step and the recess of planar portions be combined at least in the end of battery case bottom surface side in the side of battery case, therefore, the be shaped taking-up of employed former metal pattern of recess is easy to carry out, even thin battery, can not damage battery case yet, can not cause the battery case distortion.Use the battery of the battery case of making like this, can prevent the expansion of battery case side by recess.
Description of drawings
Fig. 1 is the key diagram of rectangular cell one form of implementation of the present invention.
Fig. 2 is the key diagram of another form of implementation of rectangular cell of the present invention.
Fig. 3 is the rectangular cell of the present invention key diagram of a form of implementation again.
Fig. 4 is the key diagram of battery case manufacturing process of the present invention.
Fig. 5 is the key diagram that rectangular cell of the present invention is made employed former metal pattern example.
Fig. 6 is the battery case key diagram that is used to prevent battery case distortion in the past.
Embodiment
The present invention in battery case, accommodate by dividing plate make cell device that anode electrode and negative electrode be laminated or by dividing plate with the reel rectangular cell of the flat cell device made of anode electrode and negative electrode, this rectangular cell is by forming recess at least one face of battery case side, even the battery case A/F is little and the battery of thin type, in the time of also preventing to charge with the lamination surface of cell device or perpendicular to the distortion that is expanded to the battery case that reason causes on the direction of flat horizontal surface, and the metal pattern shape that forms recess is studied, a succession of manufacturing process by means of by the transfer moudling of sheet material can produce the stable battery case of shape and dimensional accuracy.
That is to say,,, be provided with the part that recess opens wide, be easy to the taking-up of metal pattern after the drawing in the opposite side of metal pattern removing direction as the metal pattern that inserts battery case inside in order to form recess in the battery case side.
In addition, in the present invention, recess is not limited to the bottom and is provided with the structure of the face that is parallel to the battery case side, can also be that section is polygon, circle, ellipse or other curve forms of triangle etc. or the like.
Following with reference to description of drawings the present invention.
Fig. 1 is the key diagram of rectangular cell one form of implementation of the present invention.Fig. 1 (A) is its end view, and Fig. 1 (B) is that A-A ' among Fig. 1 (A) is to sectional drawing.
Accommodate make cell device that anode electrode and negative electrode be laminated by dividing plate or the battery case 1 of the flat cell device made of anode electrode and negative electrode being reeled by dividing plate, battery is formed with recess 3, formation step 10 on the upper end 9 of formed recess 3 on the side 2 of battery case 1 on the lamination surface of element or the side 2 parallel with flat horizontal surface.
On the other hand, do not form step, form smooth inclined plane 12 in the bottom 11 of recess.
The width of recess 3 preferably the battery case width 30%～90%, and be preferably disposed on the central portion of battery case side.In addition, in order to prevent the distortion of battery case, it is relatively good that near the part the battery case bight forms recess.But the method that forms recess at central portion also is good to the distortion that prevents cell device.
In addition, between the upper end and open end of the side of battery case 1 recess, be formed with the thinner wall section 13 that when the battery case pressure inside increases, works the pressure relief valve effect that discharges this internal pressure.
At the battery case material is the occasion of aluminium, and its thickness of thinner wall section that forms with this purpose is 0.05～0.2mm preferably, is 30%～60% of battery case width.
Fig. 2 is the key diagram of another form of implementation of rectangular cell of the present invention.Fig. 2 (A) is its end view, and Fig. 2 (B) is that B-B ' among Fig. 2 (A) is to sectional drawing.
Accommodate make cell device that anode electrode and negative electrode be laminated by dividing plate or the lamination surface of the battery case 1 of the flat cell device made of anode electrode and negative electrode being reeled by dividing plate or the side 2 parallel with flat horizontal surface on be formed with recess 3, any one of the upper end 9 of formed recess 3 and bottom 11 do not form step on the side 2 of battery case 1, but forms smooth inclined plane 12.
Like this, do not form the structure that step forms smooth inclined plane yet, cell device is successfully carried out to the insertion of battery case inside by the upper end.
Fig. 3 is the rectangular cell of the present invention key diagram of a form of implementation again.Fig. 3 (A) is its end view, and Fig. 3 (B) is that C-C ' among Fig. 3 (A) is to sectional drawing.
Accommodate make cell device that anode electrode and negative electrode be laminated by dividing plate or the lamination surface of the battery case 1 of the flat cell device made of anode electrode and negative electrode being reeled by dividing plate or the side 2 parallel with flat horizontal surface on be formed with a plurality of recess 3a, 3b, any one of the upper end 9 of formed recess 3 and bottom 11 do not form step on the side 2 of battery case 1, but forms smooth inclined plane 12.
A plurality of recess 3a and 3b are preferably disposed on the equally spaced position of side central authorities apart from battery case 2.In addition, under the thickness of battery case was situation about 0.3mm, the width of recess 3a and 3b is 0.4mm～1.0mm preferably.In addition, under the wall thickness of battery case was situation about 0.6mm, the width of recess 3a and 3b is 0.7mm～1.0mm preferably.Moreover, preferably 1～3 of the numbers of setting.
Below, the battery case manufacture method of rectangular cell of the present invention is described.
In general, battery case is to be raw material with sheet material, and the various operations of carrying out being processed as with pull and stretch initial point continuously are produced.Battery case of the present invention is by form operation with recess be an operation of a succession of series-operation and insert this operation and produce.
Form after the battery case shape by sheet material, insertion can form the concavity former metal pattern of recess at least one face of battery case side, carry out punch process with the formpiston metal pattern consistent from the battery case outside, thus, on any one face, form recess at least with the recess that should form.
Form after the recess, in case the side of battery case is outstanding to the inside, the taking-up that forms the employed former metal pattern of recess is the comparison difficulty, can produce scar when metal pattern takes out on battery case, has brought problems such as battery case distortion.Yet, in the present invention,, can go out recess with drawing by employed metal pattern shape is studied.
Fig. 4 is the key diagram of battery case manufacturing process of the present invention.Fig. 4 (A) is a sectional drawing of cutting expression drawing operation on the vertical plane of battery case short transverse open, and Fig. 4 (B) is the sectional drawing of cutting open along D-D ', and Fig. 4 (C) is the sectional drawing of cutting open along E-E '.
With former metal pattern 5 with concavity portion 6 after the mode of the medial surface of the lamination surface of cell device or the side 2 parallel with flat horizontal surface is inserted in the battery case 1, on the side 2 of battery case 1, from two formpiston metal patterns 14 of both sides configuration, make the convex shaped part 15 of this formpiston metal pattern 14 corresponding, carry out drawing with the concavity portion 6 of former metal pattern 5.
Then, after drawing, the former metal pattern 5 that inserts battery case inside is towards extracting extracting of direction 7, but shown in Fig. 4 (C), because with concavity portion extension that the former metal pattern is extracted the end 16 of the opposite side of direction is that the interval of thickness between bottom concavity portion is identical or less than the former metal pattern 5 at this interval, therefore, even by drawing, after forming recess on the side 2 of battery case, produce after the inner outstanding part of battery case, also can extract this former metal pattern 5 not damaging under the prerequisite that battery case or battery case do not produce distortion.
In addition, can adjust the inclination of the recess wall that drawing forms according to the difference of the inclination on the convex shaped part inclined plane 18 of the inclination on the concavity portion inclined plane 17 of former metal pattern 5, former metal pattern 14 and both sizes.When inclined plane and side angulation diminish, also can produce the part of thickness thickening, preferably carry out suitable adjustment according to the kind of the employed material of battery case, the thickness of material etc. at variant part.
In the above description, describe the situation that forms recess in the battery case both sides, still, adopted the former metal pattern that only on a face, is provided with recess, just can on any one face, form recess.
Fig. 5 is the key diagram of former metal pattern example that can be used for the manufacturing of rectangular cell of the present invention.The former metal pattern is the former metal pattern that can form concavity portion in the two sides of any battery case simultaneously.
The former metal pattern 5 that Fig. 5 (A) illustrates is such metal patterns: it opens wide with concavity portion 6 with the bottom 11 of extracting direction 7 opposite sides.
Under the situation of utilizing formpiston metal pattern extruding battery case side, the part corresponding with the recess of battery case side produces distortion, can obtain having formed in the bottom of concavity portion one side the battery case of smooth inclination.Because the bottom of concavity portion is opened wide, therefore, the former metal pattern in the insertion battery case can not be subjected to the influence to the outstanding part in battery case the inside, can be to the outside taking-up of battery case.
In addition, be leg-of-mutton recessed portion by section, will combine with the inclined plane with the wall of battery case at the section of the formed overshooting shape in the battery case the inside face that is parallel to the battery case opening partly.As a result, owing to form smooth inclined plane, therefore, cell device can successfully carry out to the insertion of battery case inside.
The 6a of concavity portion extract direction 7 and all the thickness with concavity portion is identical with this bottom 11 of extracting direction 7 opposite sides.On a face of battery case side, form an overshooting shape part in concavity portion and its central portion, but by the partly expansion of limit battery element of this overshooting shape.
Below, show embodiments of the invention, the present invention is described.
On the battery case of making by the aluminium sheet (A3003) of lengthwise 48mm, the 30mm that grows crosswise, thick 4.8mm, thickness of slab 0.3mm, utilize the former metal pattern of the lower open of recess, each face central portion in the battery case side forms the recess of wide 10mm, long 20mm, dark 0.15mm.
In battery case, with weight 92 LiMn2O4 (Li
1+xMn
2-XO
4) powder, weight is 5 carbon black, weight is that the mixture that 3 polyvinylidene fluoride is formed is coated on the aluminium foil and the dry positive pole that obtains, and weight is 91 graphitization mesocarbon particulate (メ ソ カ one ボ Application マ ィ Network ロ PVC one ズ-meso-carbon micro beads) (Osaka ガ ス makes MCMB), weight is 1 carbon black, weight be mixture that 8 polyvinylidene fluoride is formed be coated on the Copper Foil and two electrodes of the dry negative pole that obtains stacked by the dividing plate of little porousness polypropylene screen, be wound into scroll, make cell device, this cell device is contained in the battery case.
With LiPF
6The capacity of being dissolved in be 30 ethene carbonado and capacity be the mixed solvent formed of 70 second two basic carbonados molten in, making its concentration is 1.0mol/l, and the electrolyte of making is like this injected battery case, produces lithium rechargeable battery.
100 on resultant battery is charged, and the mean value that makes the thickness largest portion of battery case side is 4.96mm.
Comparative example 1
Except adopt the not unlimited mould this point in bottom as the former metal pattern, similarly to Example 1, make battery.
270 on resultant battery is charged, and the mean value that makes the thickness largest portion of battery case side is 5.10mm.
Claims (13)
1, a kind of rectangular cell, accommodate the flat cell device that makes cell device that anode electrode and negative electrode be laminated or anode electrode and negative electrode are reeled and made by dividing plate by dividing plate, it is characterized in that, be provided with recess at least one face of the lamination surface of cell device or the battery case side parallel with flat horizontal surface, this recess is by not having the inclined plane of step to form in the end of battery case bottom surface side at least.
2, rectangular cell according to claim 1 is characterized in that, is provided with step in the end of battery case peristome one side of recess.
3, rectangular cell according to claim 1 is characterized in that, described recess is provided with a plurality of.
4, rectangular cell according to claim 2 is characterized in that, described recess is provided with a plurality of.
5, according to each described rectangular cell in the claim 1～4, it is characterized in that, be provided with a plurality of recesses in direction towards the battery case peristome.
6, rectangular cell according to claim 5 is characterized in that, on the top of the recess that is arranged at the side, is provided with the thinner wall section of splitting by the increase of internal pressure.
7, rectangular cell according to claim 5 is characterized in that, described recess is provided with a plurality of.
8, rectangular cell according to claim 6 is characterized in that, described recess is provided with a plurality of.
9, rectangular cell according to claim 5 is characterized in that, is provided with a plurality of recesses in the direction towards the battery case opening.
10, rectangular cell according to claim 6 is characterized in that, is provided with a plurality of recesses in the direction towards the battery case opening.
11, rectangular cell according to claim 7 is characterized in that, is provided with a plurality of recesses in the direction towards the battery case opening.
12, rectangular cell according to claim 8 is characterized in that, is provided with a plurality of recesses in the direction towards the battery case opening.
13, a kind of manufacture method of rectangular cell, described rectangular cell be accommodate by dividing plate make cell device that anode electrode and negative electrode be laminated or by dividing plate with the reel rectangular cell of the flat cell device made of anode electrode and negative electrode, it is characterized in that, battery case side with respect to the flat horizontal surface that is parallel to cell device, be configured in battery case side and battery case bottom side and be provided with the former metal pattern of unlimited recess, and configuration is from the outside of battery case and the chimeric formpiston metal pattern of recess of former metal pattern, carry out drawing, form recess thus, this recess has the inclined plane that does not have step at least in the end of battery case bottom surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001038433A JP3725433B2 (en) | 2001-02-15 | 2001-02-15 | Square battery and method of manufacturing the same |
| JP38433/01 | 2001-02-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1371140A true CN1371140A (en) | 2002-09-25 |
| CN1246924C CN1246924C (en) | 2006-03-22 |
Family
ID=18901403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021046638A Expired - Lifetime CN1246924C (en) | 2001-02-15 | 2002-02-10 | Square battery |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3725433B2 (en) |
| KR (1) | KR20020067648A (en) |
| CN (1) | CN1246924C (en) |
| TW (1) | TW529192B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100448092C (en) * | 2004-07-29 | 2008-12-31 | 三星Sdi株式会社 | Secondary battery |
| CN101170165B (en) * | 2006-10-25 | 2011-10-26 | 三星Sdi株式会社 | Prismatic can type lithium ion rechargeable battery |
| CN102427114A (en) * | 2011-12-02 | 2012-04-25 | 苏州冠硕新能源有限公司 | Battery and battery shell |
| WO2017113099A1 (en) * | 2015-12-29 | 2017-07-06 | 宁德时代新能源科技股份有限公司 | Secondary battery and preparation method therefor |
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| KR100490538B1 (en) * | 2002-09-03 | 2005-05-17 | 삼성에스디아이 주식회사 | Battery |
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-
2001
- 2001-02-15 JP JP2001038433A patent/JP3725433B2/en not_active Expired - Lifetime
-
2002
- 2002-02-06 TW TW091102065A patent/TW529192B/en not_active IP Right Cessation
- 2002-02-10 CN CNB021046638A patent/CN1246924C/en not_active Expired - Lifetime
- 2002-02-14 KR KR1020020007906A patent/KR20020067648A/en active IP Right Grant
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| CN101170165B (en) * | 2006-10-25 | 2011-10-26 | 三星Sdi株式会社 | Prismatic can type lithium ion rechargeable battery |
| CN102427114A (en) * | 2011-12-02 | 2012-04-25 | 苏州冠硕新能源有限公司 | Battery and battery shell |
| WO2017113099A1 (en) * | 2015-12-29 | 2017-07-06 | 宁德时代新能源科技股份有限公司 | Secondary battery and preparation method therefor |
| CN109314202A (en) * | 2016-07-12 | 2019-02-05 | 三星Sdi株式会社 | Secondary cell |
| US11502327B2 (en) | 2016-07-12 | 2022-11-15 | Samsung Sdi Co., Ltd. | Secondary battery |
| CN113381099A (en) * | 2020-02-21 | 2021-09-10 | 比亚迪股份有限公司 | Battery case, battery pack, battery module and electric vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20020067648A (en) | 2002-08-23 |
| JP3725433B2 (en) | 2005-12-14 |
| TW529192B (en) | 2003-04-21 |
| JP2002245975A (en) | 2002-08-30 |
| CN1246924C (en) | 2006-03-22 |
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