CN106159350B - A kind of coin shape lithium ion secondary battery and preparation method thereof - Google Patents
A kind of coin shape lithium ion secondary battery and preparation method thereof Download PDFInfo
- Publication number
- CN106159350B CN106159350B CN201510202598.7A CN201510202598A CN106159350B CN 106159350 B CN106159350 B CN 106159350B CN 201510202598 A CN201510202598 A CN 201510202598A CN 106159350 B CN106159350 B CN 106159350B
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- Prior art keywords
- cup
- auxiliary device
- battery core
- cap assembly
- column auxiliary
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 238000002347 injection Methods 0.000 claims abstract description 41
- 239000007924 injection Substances 0.000 claims abstract description 41
- 239000003792 electrolyte Substances 0.000 claims abstract description 11
- 238000009413 insulation Methods 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 9
- 239000011324 bead Substances 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- 239000004411 aluminium Substances 0.000 description 9
- 239000010410 layer Substances 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 7
- 239000010935 stainless steel Substances 0.000 description 7
- 238000004804 winding Methods 0.000 description 6
- 241000237983 Trochidae Species 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241000469816 Varus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
-
- 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
- H01M50/147—Lids or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/153—Lids or covers characterised by their shape for button or coin cells
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The invention discloses a kind of coin shape lithium ion secondary batteries comprising battery case, and battery core and electrolyte set on interior of shell；It is characterized in that, the battery core is cylindrical battery core, and battery core center is equipped with the column auxiliary device of an inner hollow；The shell includes cap assembly and bottom cup, and bottom cup opening is equipped with top cover and places position, and the cap assembly is with bottom cup by being welded and fixed；Described battery core the two poles of the earth are respectively connected with by guide card and cap assembly and bottom cup；In being additionally provided with liquid injection hole on shell.The invention also discloses the preparation methods of the coin shape lithium ion secondary battery.
Description
Technical field
The present invention relates to lithium ion battery manufacturing fields, and in particular to a kind of coin shape lithium ion secondary battery and the knob
The preparation method of button-type lithium ion secondary battery.
Background technique
Button cell is a kind of chamber structure being composed of metal bottom shell and top shell.Bottom case is usually connected with anode,
And top shell is usually connected with cathode.Across one layer of plastic rubber ring (usually polypropylene) between bottom case and top shell.Cushion rubber rises simultaneously
Sealing and insulation function.When sealing, bottom case edge is included to form closed housing with top shell by the extruding varus of mechanical force
Body.Specific example is shown in US6569564.
Normally, " Sanming City that the enclosure interior of button cell is made of the positive plate, diaphragm paper and negative electrode tab of single layer
Control " battery core of structure, the upper bottom surface that battery core is parallel to shell is horizontal positioned.The capacity of the button cell of the method preparation is very
It is limited.Patent US20120028110A1 describes a kind of button cell of high capacity with roundlet moisture-sensitive battery core, battery core
Electrode slice and diaphragm perpendicular to shell upper bottom surface.Traditionally, in the seal process of button cell be attached to it is axial
Mechanical force, mechanism can cause the deformation of roundlet cylindricality battery core, bad so as to cause the production of battery.Improved sealing side
By applying simple radial mechanical force in drain pan side bottom, the cushion rubber squeezed between drain pan side and top shell edge carries out method
Sealing, to operatively avoid destruction of the mechanical force to winding battery core in the process.
Aluminum-shell battery and cylindrical battery all use metal shell, can be in certain journey compared to polymer soft-package battery
It avoids producing the variation of external size caused by gas due to inside battery on degree.However, the top combination of cylindrical battery needs to account for
With certain space, there is the design limit of itself in the height direction.Aluminum-shell battery is with firmer shell and larger
Battery core space, it is possible to prevente effectively from soft-package battery and the respective deficiency of cylindrical battery, package technique can be answered by reference
For designing and manufacturing for button cell, become the alternative for preparing high capacity button cell.
Summary of the invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a kind of coin shape lithium ion secondary battery and the knobs
The preparation method of button-type lithium ion secondary battery.
Present invention technical solution used for the above purpose is:
A kind of coin shape lithium ion secondary battery comprising battery case, and battery core and electrolyte set on interior of shell；
The battery core is cylindrical battery core, and battery core center is equipped with the column auxiliary device of an inner hollow；The shell includes top cover
Component and bottom cup, and bottom cup opening is equipped with top cover and places position, the cap assembly is with bottom cup by being welded and fixed；The battery core
The two poles of the earth are respectively connected with by guide card and cap assembly and bottom cup；In being additionally provided with liquid injection hole on shell.
The cap assembly includes the round cover plate that through-hole is equipped among center pillar part and one, and the center pillar part is set
Felt pad is equipped in round cover plate through hole, and between center pillar part and round cover plate；The center pillar part mid diameter
Less than both ends diameter, and detent is formed, and center pillar part lower end is located in the column auxiliary device；The circle cover plate
The fastener with the clamping matching is equipped with around through-hole, and the fastener top is equipped with center pillar part and felt pad places position.
Center pillar part uses stainless steel.Round cover plate and bottom cup use identical metal material, can be stainless
Steel or aluminium are preferentially aluminium.Round cover plate and the bottom material that uses of cup decide the arrangement of positive and negative anodes guide card and they are external
To the mode of battery case.When material is aluminium, cathode guide card occupy the center of battery core, is connected upwardly to center pillar part, and
Positive guide card occupy the periphery or middle part of battery core, and the bottom of bottom cup is connected to after folding to center；When material is stainless steel,
Anode and cathode goes out guide card and guide card and the connection type of shell is exchanged just.The connection of guide card and shell passes through spot welding, surpasses
The methods of sound wave or laser welding are realized.
The column auxiliary device is a hollow pipe, is equipped with opening in the column auxiliary device side, and the opening is upper
End be greater than lower end or upper and lower side it is consistent, the guide card is entered in column auxiliary device by upper end opening, and with top cap central column
Shape part is connected.
The battery core is wound on roller by positive plate, negative electrode tab and diaphragm, wherein the diaphragm is set to anode
Between piece and negative electrode tab, and battery core outermost layer is diaphragm；Battery core upper and lower ends and shell contact portion are equipped with insulation meson, and in
Bottom bottom of a cup portion or top cover are additionally provided with a counter bore structure.
The liquid injection hole is set on cap assembly or bottom cup；When being set on cap assembly, it is set to top cover circle cover plate
On；When being set on the cup of bottom, which is set to Di Bei bottom centre comprising one by the inwardly protruded protrusion in bottom bottom of a cup portion
Part, protruding part middle part is equipped with liquid injection hole, and a check ball is equipped at the liquid injection hole, and the protruding part is located at column auxiliary
In device, in the bottom, bottom of a cup portion is additionally provided with a bimetal leaf (when cup and lid are using aluminum).
A kind of preparation method of the coin shape lithium ion secondary battery comprising following steps:
(1) battery case is prepared, which includes bottom cup, cap assembly and liquid injection hole；
(2) column auxiliary device is prepared, which is sheathed on volume needle, by positive plate, diaphragm and cathode
Piece is sequentially arranged on coiling machine, is wound into core, or first positive plate, diaphragm and negative electrode tab are sequentially arranged on coiling machine, winding
It is placed in core at core, then by column auxiliary device, wherein diaphragm is set between positive plate and negative electrode tab, and core is outermost
Layer is diaphragm, obtains battery core；
(3) pole in battery core is curved inwardly, then entire battery core is put into the bottom cup for being equipped with insulation meson, and will
The guide card of one pole is welded on top cover if above, and bottom cup bottom of a cup is welded on if below；
(4) guide card of another pole is welded in cap assembly bottom, and the pole guide card is rolled well and is put into column auxiliary device
It is interior, and the setting insulation meson at the top of battery core；
(5) top cover that cap assembly is placed in bottom cup opening is placed into position, and top cover and bottom cup is welded；
(6) liquid injection hole is sealed with metal beads, obtains coin shape lithium ion two after electrolyte is added by liquid injection hole
Primary cell.
The cap assembly includes the round cover plate that through-hole is equipped among center pillar part and one, and the center pillar part is set
Felt pad is equipped in round cover plate through hole, and between center pillar part and round cover plate；The center pillar part mid diameter
Less than both ends diameter, and detent is formed, and center pillar part lower end is located in the column auxiliary device；The circle cover plate
The fastener with the clamping matching is equipped with around through-hole, and the fastener top is equipped with center pillar part and felt pad places position.
The column auxiliary device is a hollow pipe, is equipped with opening in the column auxiliary device side, and the opening is upper
End be greater than lower end or upper and lower side it is consistent, the guide card is entered in column auxiliary device by upper end opening, and with top cap central column
Shape part is connected；A counter bore structure is additionally provided in bottom bottom of a cup portion or top cover.
The liquid injection hole is set on cap assembly or bottom cup；When liquid injection hole is set on cap assembly, it is set to top cover circle
On shape cover plate.
When be set to bottom cup on when, the liquid injection hole be set to Di Bei bottom centre, bottom cup center setting one from bottom bottom of a cup portion to
The protruding part of internal projection, liquid injection hole is arranged in protruding part middle part, and when being put into battery core, the column auxiliary device is sheathed on described
On protruding part, cap assembly seal welding is then carried out, electrolyte is then injected into, is sealed with metal beads；In the bottom bottom of a cup portion
It is additionally provided with a bimetal leaf (when cup and lid are using aluminum).
The beneficial effects of the present invention are: thering is one to reserve at the top of Yu Zhuzhuan auxiliary device by setting column auxiliary device
Gap or simultaneously along centre open a seam downwards, be conveniently used for different winding methods, column auxiliary device insertion volume
In-core, material can be the insulating materials such as polypropylene.Then column auxiliary device can just be covered before winding to be rolled up on volume needle
Piece, at the same can be convenient winding after battery core run-bake-needle fault；Column auxiliary device is inserted into electricity again after can also winding
Core center.On the one hand, column auxiliary device supports the structure of battery core, prevents the battery core in cell assembling processes from loosely falling off；
On the other hand, the use of column auxiliary device is conducive to push up agreeing with for lid and bottom cup, and the protrusion of cap base can be by column
Shape auxiliary device is easily inserted into inside battery core, also secures the position of battery core inside housings to a certain extent at the same time
It sets.Reserved gap is the shell that battery core center guide card is linked into battery via sebific duct for convenience at the top of column auxiliary device,
Guide card can be in column auxiliary device folded inside.The object of influence height space can be imported in intermediate sebific duct, be allowed in this way
Height space plays maximum use.
There is the interior design of special construction by the package technique and the present invention that improve aluminum-shell battery, can be battery core
Save it is bigger using space, thus the significant capacity for improving button cell.The top lid and bottom cup of button cell passes through
Non-mechanical means (laser welding technology) are tightly connected.Top cover consists of two parts: central projection is divided into a pole of battery, outside
The annular flake enclosed is another pole of battery.The plastic film of insulation is separated between two parts, by rivet arrangement by two
Divide and is closely joined together to form top cover.The annular flake use of top cover periphery identical material with bottom cup, is welded with facilitating
Connect sealing.
The position of liquid filling hole is moved on among bottom of a cup from upper top, added thickness is hidden in intermediate sebific duct, top upper in this way
There is the corresponding position of pole piece can be thinner, further increase inner space, allows that battery is made thinner or capacity does more.
Detailed description of the invention
Fig. 1 is column assistant apparatus structure schematic diagram of the present invention；
Fig. 2 is 1 structural schematic diagram of the embodiment of the present invention；
Fig. 3 is 2 structural schematic diagram of the embodiment of the present invention.
In figure: 2. bottom of 1a. center pillar part 1b. felt pad 1c. circle cover plate, 3. top covers of cup place 4. battery core 5. of position
Insulate 7. liquid injection hole of meson, 8. counter bore structure, 9. column auxiliary device, 10. positive plate, 11. cathode at top insulation 6. bottom of meson
12. bimetal leaf of piece
Specific embodiment
Embodiment 1: referring to Fig. 1 and Fig. 2, the present embodiment provides a kind of coin shape lithium ion secondary batteries comprising battery
Shell, and battery core 4 and electrolyte set on interior of shell；The battery core 4 is cylindrical battery core, and 4 center of battery core is equipped in one
The hollow column auxiliary device 9 in portion；The shell includes cap assembly and bottom cup 2, and bottom 2 openings of cup are equipped with top cover and place position
3, the cap assembly is with bottom cup 2 by being welded and fixed；Distinguished by guide card and cap assembly and bottom cup 2 at described 4 the two poles of the earth of battery core
It is connected；In being additionally provided with liquid injection hole 7 on shell.
The cap assembly includes the round cover plate 1c that through-hole is equipped among center pillar part 1a and one, the center pillar
Part 1a is set to the circle through hole cover plate 1c, and is equipped with felt pad 1b between center pillar part 1a and round cover plate 1c；The center
Cylindrical member 1a mid diameter is less than both ends diameter, and forms detent, and the center pillar lower end part 1a is located at column auxiliary dress
It sets in 9；The fastener with the clamping matching is equipped with around the through-hole of the circle cover plate 1c, and the fastener top is equipped with newel
Shape part 1a and felt pad 1b places position.
Center pillar part 1a uses stainless steel.Round cover plate 1c and bottom cup 2 use identical metal material, can be
Stainless steel or aluminium are preferentially aluminium.Round cover plate and the bottom material that uses of cup decide positive and negative anodes guide card arrangement and they
It is external to the mode of battery case.When material is aluminium, cathode guide card occupy the center of battery core, is connected upwardly to center pillar
Part, and positive guide card occupy the periphery or middle part of battery core, and the bottom of bottom cup is connected to after folding to center；When material is stainless
When steel, anode and cathode goes out guide card and guide card and the connection type of shell is exchanged just.The connection of guide card and shell passes through a little
The methods of weldering, ultrasonic wave or laser welding are realized.
The column auxiliary device 9 is a hollow pipe, is equipped with opening in the column auxiliary device side, and the opening is upper
End is greater than lower end, and the guide card is entered in column auxiliary device 9 by upper end opening, and is connected with top cap central cylindrical member 1a
It connects.
The battery core is wound on roller by positive plate 10, negative electrode tab 11 and diaphragm, wherein the diaphragm is set to
Between positive plate 10 and negative electrode tab 11, and battery core outermost layer is diaphragm；Battery core upper and lower ends and shell contact portion are equipped with insulation
Meson, and a counter bore structure 8 is additionally provided in bottom bottom of a cup portion or top cover.
The liquid injection hole 7 is set on cap assembly；When being set on cap assembly, it is set on top cover circle cover plate 1c.
A kind of preparation method of the coin shape lithium ion secondary battery comprising following steps:
(1) battery case is prepared, which includes bottom cup 2, cap assembly and liquid injection hole 7；
(2) prepare column auxiliary device 9, by the column auxiliary device 9 be sheathed on volume needle on, by positive plate 10, diaphragm and
Negative electrode tab 11 is sequentially arranged on coiling machine, is wound into core, or positive plate 10, diaphragm and negative electrode tab 11 are first sequentially arranged in coiling
On machine, be wound into core, then column auxiliary device 9 is placed in core, wherein diaphragm be set to positive plate 10 and negative electrode tab 11 it
Between, and core outermost layer is diaphragm, obtains battery core 4；
(3) pole in battery core 4 is curved inwardly, entire battery core is then put into the bottom cup 2 equipped with bottom insulation meson 6
It is interior, and the guide card of a pole is welded on bottom 2 bottom of a cup of cup；
(4) guide card of another pole is welded in cap assembly bottom, and the pole guide card is rolled well and is put into column auxiliary device 9
It is interior, and the setting top insulation meson 5 at the top of battery core 4；
(5) top cover that cap assembly is placed in bottom 2 openings of cup is placed into position 3, and top cover and bottom cup 2 is welded；
(6) liquid injection hole is sealed with metal beads, obtains coin shape lithium ion two after electrolyte is added by liquid injection hole 7
Primary cell.
The cap assembly includes the round cover plate 1c that through-hole is equipped among center pillar part 1a and one, the center pillar
Part 1a is set to the circle through hole cover plate 1c, and is equipped with felt pad 1b between center pillar part 1a and round cover plate 1c；The center
Cylindrical member 1a mid diameter is less than both ends diameter, and forms detent, and the center pillar lower end part 1a is located at column auxiliary dress
It sets in 9；The fastener with the clamping matching is equipped with around the through-hole of the circle cover plate 1c, and the fastener top is equipped with newel
Shape part 1a and felt pad 1b places position.
The column auxiliary device 9 is a hollow pipe, is equipped with opening in the column auxiliary device side, and the opening is upper
End is greater than lower end, and the guide card is entered in column auxiliary device 9 by upper end opening, and is connected with top cap central cylindrical member 1a
It connects.
The liquid injection hole 7 is set on cap assembly；When liquid injection hole 7 is set on cap assembly, it is set to top cover circular lid
On piece 1c.
Embodiment 2: referring to Fig. 3, the present embodiment provides a kind of coin shape lithium ion secondary battery and the coin shape lithium ions
The preparation method of secondary cell；Its structure and step are substantially the same manner as Example 1, the difference is that:
A kind of coin shape lithium ion secondary battery comprising battery case, and battery core 4 and electrolysis set on interior of shell
Liquid；The battery core 4 is cylindrical battery core, and 4 center of battery core is equipped with the column auxiliary device 9 of an inner hollow；The shell packet
Cap assembly and bottom cup 2 are included, and bottom 2 openings of cup are equipped with top cover and place position 3, the cap assembly and bottom cup 2 are solid by welding
It is fixed；Described 4 the two poles of the earth of battery core are respectively connected with by guide card and cap assembly and bottom cup 2；In being additionally provided with liquid injection hole 7 on shell.
The cap assembly includes the round cover plate 1c that through-hole is equipped among center pillar part 1a and one, the center pillar
Part 1a is set to the circle through hole cover plate 1c, and is equipped with felt pad 1b between center pillar part 1a and round cover plate 1c；The center
Cylindrical member 1a mid diameter is less than both ends diameter, and forms detent, and the center pillar lower end part 1a is located at column auxiliary dress
It sets in 9；The fastener with the clamping matching is equipped with around the through-hole of the circle cover plate 1c, and the fastener top is equipped with newel
Shape part 1a and felt pad 1b places position.
Center pillar part 1a uses stainless steel.Round cover plate 1c and bottom cup 2 use identical metal material, can be
Stainless steel or aluminium are preferentially aluminium.Round cover plate and the bottom material that uses of cup decide positive and negative anodes guide card arrangement and they
It is external to the mode of battery case.When material is aluminium, cathode guide card occupy the center of battery core, is connected upwardly to center pillar
Part, and positive guide card occupy the periphery or middle part of battery core, and the bottom of bottom cup is connected to after folding to center；When material is stainless
When steel, anode and cathode goes out guide card and guide card and the connection type of shell is exchanged just.The connection of guide card and shell passes through a little
The methods of weldering, ultrasonic wave or laser welding are realized.
The column auxiliary device 9 is a hollow pipe, is equipped with opening in the column auxiliary device side, and the opening is upper
End is greater than lower end, and the guide card is entered in column auxiliary device 9 by upper end opening, and is connected with top cap central cylindrical member 1a
It connects.
The battery core is wound on roller by positive plate 10, negative electrode tab 11 and diaphragm, wherein the diaphragm is set to
Between positive plate 10 and negative electrode tab 11, and battery core outermost layer is diaphragm；Battery core upper and lower ends and shell contact portion are equipped with insulation
Meson, and a counter bore structure 8 is additionally provided in bottom bottom of a cup portion.
The liquid injection hole 7 is set on bottom cup 2；The liquid injection hole 7 is set to 2 bottom centre of Di Bei comprising one by bottom bottom of a cup portion
Inwardly protruded protruding part, protruding part middle part is equipped with liquid injection hole 7, and a check ball, the protruding part are equipped at the liquid injection hole 7
In the column auxiliary device 9, a bimetal leaf 12 is additionally provided with (when cup and lid are using aluminum in the bottom 2 bottoms of cup
When).
A kind of preparation method of the coin shape lithium ion secondary battery comprising following steps:
(1) battery case is prepared, which includes bottom cup 2, cap assembly and liquid injection hole 7；
(2) prepare column auxiliary device 9, by the column auxiliary device 9 be sheathed on volume needle on, by positive plate 10, diaphragm and
Negative electrode tab 11 is sequentially arranged on coiling machine, is wound into core, or positive plate 10, diaphragm and negative electrode tab 11 are first sequentially arranged in coiling
On machine, be wound into core, then column auxiliary device 9 is placed in core, wherein diaphragm be set to positive plate 10 and negative electrode tab 11 it
Between, and core outermost layer is diaphragm, obtains battery core 4；
(3) pole in battery core 4 is curved inwardly, then entire battery core is put into the bottom cup equipped with bottom insulation meson 6,
And the guide card of a pole is welded on bottom 2 bottom of a cup of cup；
(4) guide card of another pole is welded in cap assembly bottom, and the pole guide card is rolled well and is put into column auxiliary device 9
It is interior, and the setting top insulation meson 5 at the top of battery core 4；
(5) top cover that cap assembly is placed in bottom 2 openings of cup is placed into position 3, and top cover and bottom cup 2 is welded；
(6) liquid injection hole is sealed with metal beads, obtains coin shape lithium ion two after electrolyte is added by liquid injection hole 7
Primary cell.
The cap assembly includes the round cover plate 1c that through-hole is equipped among center pillar part 1a and one, the center pillar
Part 1a is set to the circle through hole cover plate 1c, and is equipped with felt pad 1b between center pillar part 1a and round cover plate 1c；The center
Cylindrical member 1a mid diameter is less than both ends diameter, and forms detent, and the center pillar lower end part 1a is located at column auxiliary dress
It sets in 9；The fastener with the clamping matching is equipped with around the through-hole of the circle cover plate 1c, and the fastener top is equipped with newel
Shape part 1a and felt pad 1b places position.
The column auxiliary device 9 is a hollow pipe, is equipped with opening in the column auxiliary device side, and the opening is upper
End is greater than lower end, and the guide card is entered in column auxiliary device 9 by upper end opening, and is connected with top cap central cylindrical member 1a
It connects.
The liquid injection hole 7 is set on bottom cup 2.The liquid injection hole 7 be set to 2 bottom centre of Di Bei, bottom cup 2 centers setting one by
The inwardly protruded protruding part in bottom 2 bottoms of cup, liquid injection hole 7 is arranged in protruding part middle part, when being put into battery core 4, the column auxiliary
Device 9 is sheathed on the protruding part, is then carried out cap assembly seal welding, is then injected into electrolyte, close with metal beads
Envelope；In the bottom, bottom of a cup portion is additionally provided with a bimetal leaf 12 (when cup and lid are using aluminum).
The present embodiment moves on to the position of liquid filling hole among bottom of a cup from upper top, and added thickness is hidden in middle column auxiliary
In device, top upper in this way has the corresponding position of pole piece can be thinner, further increases inner space, battery is allow to be made shorter
Or capacity does more.
But the foregoing is merely preferable possible embodiments of the invention, not to limit to the scope of the patents of the invention, therefore
It is all to use equivalence changes made by present specification and attached drawing, it is included within the scope of protection of the present invention.
Claims (9)
1. a kind of coin shape lithium ion secondary battery comprising battery case, and battery core and electrolyte set on interior of shell；Its
It is characterized in that, the battery core is cylindrical battery core, and battery core center is equipped with the column auxiliary device of an inner hollow；The shell
Including cap assembly and bottom cup, and bottom cup opening is equipped with top cover and places position, and the cap assembly is with bottom cup by being welded and fixed；
Described battery core the two poles of the earth are respectively connected with by guide card and cap assembly and bottom cup；In being additionally provided with liquid injection hole, the top cover on shell
Component includes the round cover plate that through-hole is equipped among center pillar part and one, and the center pillar part is set to round cover plate through-hole
Place, and felt pad is equipped between center pillar part and round cover plate；The center pillar part mid diameter is less than both ends diameter, and
Detent is formed, and center pillar part lower end is located in the column auxiliary device；It is described circle cover plate through-hole around be equipped with
The fastener of the clamping matching, and the fastener top is equipped with center pillar part and felt pad places position.
2. coin shape lithium ion secondary battery according to claim 1, which is characterized in that the column auxiliary device is one
Hollow pipe is equipped with opening in the column auxiliary device side, and the upper end of the opening is greater than lower end or upper and lower side is consistent, described to lead
Piece is entered in column auxiliary device by upper end opening, and is connected with top cap central cylindrical member.
3. coin shape lithium ion secondary battery according to claim 1, which is characterized in that the battery core is by positive plate, negative
Pole piece and diaphragm are wound on roller, wherein the diaphragm is set between positive plate and negative electrode tab, and battery core outermost layer
For diaphragm；Battery core upper and lower ends and shell contact portion are equipped with insulation meson, and are additionally provided with a counter bore structure in bottom bottom of a cup portion.
4. coin shape lithium ion secondary battery according to claim 1, which is characterized in that the liquid injection hole is set to top cover group
On part or bottom cup；When being set on cap assembly, it is set to top cover circular lid on piece；When being set on the cup of bottom, which is set
In Di Bei bottom centre comprising one is equipped with liquid injection hole by the inwardly protruded protruding part in bottom bottom of a cup portion, protruding part middle part, and should
A check ball is equipped at liquid injection hole, the protruding part is located in the column auxiliary device, and bottom of a cup portion is additionally provided with a pair of in the bottom
Sheet metal.
5. the preparation method of coin shape lithium ion secondary battery described in a kind of one of Claims 1 to 4, which is characterized in that it is wrapped
Include following steps:
(1) battery case is prepared, which includes bottom cup, cap assembly and liquid injection hole；
(2) prepare column auxiliary device, by the column auxiliary device be sheathed on volume needle on, by positive plate, diaphragm and negative electrode tab according to
It is secondary to be set on coiling machine, it is wound into core, or first positive plate, diaphragm and negative electrode tab are sequentially arranged on coiling machine, is wound into a roll
Core, then column auxiliary device is placed in core, wherein diaphragm is set between positive plate and negative electrode tab, and core outermost layer is
Diaphragm obtains battery core；
(3) pole in battery core is curved inwardly, then entire battery core is put into the bottom cup for being equipped with insulation meson, and by a pole
Guide card be welded on bottom cup bottom of a cup；
(4) guide card of another pole is welded in cap assembly bottom, and the pole guide card is rolled well and is put into column auxiliary device, and
The setting insulation meson at the top of battery core；
(5) top cover that cap assembly is placed in bottom cup opening is placed into position, and top cover and bottom cup is welded；
(6) liquid injection hole is sealed with metal beads after electrolyte is added by liquid injection hole, obtains coin shape lithium ion secondary electricity
Pond.
6. preparation method according to claim 5, which is characterized in that the cap assembly includes in center pillar part and one
Between be equipped with the round cover plate of through-hole, the center pillar part is set to round cover plate through hole, and center pillar part and round cover plate
Between be equipped with felt pad；The center pillar part mid diameter is less than both ends diameter, and forms detent, and center pillar part lower end
In the column auxiliary device；The fastener with the clamping matching, and the card are equipped with around the through-hole of the circle cover plate
Part top is equipped with center pillar part and felt pad places position.
7. preparation method according to claim 5, which is characterized in that the column auxiliary device is a hollow pipe, in this
Column auxiliary device side is equipped with opening, and the upper end of the opening is greater than lower end or upper and lower side is consistent, and the guide card passes through upper end
Opening enters in column auxiliary device, and is connected with top cap central cylindrical member；A counter bore structure is additionally provided in bottom bottom of a cup portion.
8. preparation method according to claim 5, which is characterized in that the liquid injection hole is set on cap assembly or bottom cup；
When liquid injection hole is set on cap assembly, it is set to top cover circular lid on piece.
9. preparation method according to claim 6, which is characterized in that when being set on the cup of bottom, which is set to bottom cup
Bottom centre, the bottom of at, liquid injection hole is arranged by the inwardly protruded protruding part in bottom bottom of a cup portion, protruding part middle part in cup center setting one,
When being put into battery core, the column auxiliary device is sheathed on the protruding part, is then carried out cap assembly seal welding, is then infused
Enter electrolyte, is sealed with metal beads；In the bottom, bottom of a cup portion is additionally provided with a bimetal leaf.
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| CN201510202598.7A CN106159350B (en) | 2015-04-27 | 2015-04-27 | A kind of coin shape lithium ion secondary battery and preparation method thereof |
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| CN201510202598.7A CN106159350B (en) | 2015-04-27 | 2015-04-27 | A kind of coin shape lithium ion secondary battery and preparation method thereof |
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| CN106159350A CN106159350A (en) | 2016-11-23 |
| CN106159350B true CN106159350B (en) | 2019-04-26 |
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