CN207353376U - Cutting mechanism and rechargeable battery - Google Patents
Cutting mechanism and rechargeable battery Download PDFInfo
- Publication number
- CN207353376U CN207353376U CN201721495882.9U CN201721495882U CN207353376U CN 207353376 U CN207353376 U CN 207353376U CN 201721495882 U CN201721495882 U CN 201721495882U CN 207353376 U CN207353376 U CN 207353376U
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- Prior art keywords
- rechargeable battery
- shell
- cutting mechanism
- inner cover
- expanding unit
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- 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
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- 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
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- Sealing Battery Cases Or Jackets (AREA)
Abstract
A kind of cutting mechanism for rechargeable battery is the utility model is related to, the cutting mechanism includes：Column piston part, it is configured as being inserted into inside the winding battery core of the rechargeable battery；Expanding unit, the expanding unit is connected with one end of the column piston part, and the column piston part is substantially perpendicular to the expanding unit, wherein at least one side edge of the expanding unit or a part of edge come close to or in contact with the guiding export body of the rechargeable battery and the guiding are exported body cut-out by the expanding unit when the shell and inner cover of the rechargeable battery separate preset distance.The utility model further relates to rechargeable battery.
Description
Technical field
It the utility model is related to a kind of compact battery structure, more particularly to cutting mechanism and rechargeable battery.
Background technology
Compact battery such as button cell is usually outer with being made of two shell semimembers, i.e. cell cup and battery cover
Shell.They can for example be manufactured by the deep drawn sheet metal of nickel plating as punching press drawing component.In general, cell cup is polarized to just
And battery cover be polarized to it is negative.Current rechargeable battery, particularly lithium ion battery, and lithium ion soft-package battery
It is widely used and the battery apparatus that can be held and small-sized luminaire, such as mobile phone, wireless headset, flashing light for bicycle
Deng.
In small electronic equipment, energy density per unit volume metric density is a key factor.Due to chargeable lithium ion
The volume of battery requires, and in order to reduce the application function that battery volume ensures battery at the same time, generally uses spiral coiling at present
Battery core.However, during battery volume energy density is increased, new technical problem is brought.In current informationization
Generation, wearable device are widely used, and it is rechargeable lithium ion batteries that its built-in power is most of, and common aluminum hull Soft Roll is chargeable
Lithium ion battery, can produce bulging during repeated charge, and is led to leakage or pops, so as to influence personal safety.For
Improve the continuation of the journey usage time of wearable device, it will usually at utmost increase the active material of battery to the greatest extent, this is to battery
Security requirement is by higher.Meanwhile in order to improve battery capacity, shell can also be accomplished more and more thinner.Therefore, battery is being improved
, it is necessary to consider the safety issue of miniature rechargeable battery while capacity.
Utility model content
The utility model aim to provide it is a kind of can avoid in a charging situation failure, improve security cutting mechanism,
Rechargeable battery and its manufacture method.
The utility model proposes a kind of cutting mechanism for rechargeable battery, the cutting mechanism includes：Column piston part,
It is configured as being inserted into inside the winding battery core of the rechargeable battery；Expanding unit, wherein the expanding unit and the column plug
The one end in portion is connected, and the column piston part is substantially perpendicular to the expanding unit, wherein at least the one of the expanding unit
Lateral edges or a part of edge are configured as coming close to or in contact with the guiding electrode export body of the rechargeable battery and described
The guiding is exported into body cut-out by the expanding unit when shell and inner cover the separation preset distance of rechargeable battery.
Preferably, the material of the cutting mechanism is PP, PEEK or polymer insulation resistant material.
Preferably, the expanding unit have selected from sector, circle, ellipse, prismatic, triangle and it is square in a kind of shape
Shape.
Preferably, the bottom surface of the expanding unit and side separate preset distance in the shell and inner cover of the rechargeable battery
When form the knife edge so that cut off cathode guiding export body and/or anode guiding export body.It is highly preferred that the bottom of the expanding unit
Face and side are in substantially 90 ° of angles.
Preferably, the edge of the expanding unit is jagged edge.
Preferably, the column piston part is solid or hollow.
Preferably, the column piston part is integrally formed by mould punching.
The utility model also proposes a kind of rechargeable battery, and the rechargeable battery includes：Housing；Battery core is wound, it is described
Winding battery core includes the positive plate and negative plate wound after partition is isolated, from the end of the positive plate and negative plate point
The cathode guiding export body and anode guiding export body do not drawn；It is described to cut with the cutting mechanism of at least one the utility model
The inside of the column piston part insertion winding battery core of cutting mill structure, and the edge of the expanding unit of the cutting mechanism is close or connect
Touch cathode guiding export body and anode guiding export body in it is at least one, especially come close to or in contact with cathode guiding export body and
At least one bending part in anode guiding export body.
Preferably, the housing includes the shell with opening, inner cover in shell is nested in by opening and positioned at outer
Between shell and inner cover and the sealing ring that isolates shell and inner cover, the shell include basal surface and side wall of outer shell, the shell
Side wall end is in retraction form, and the inner cover includes top surface and inner cover side wall, the inner cover side wall with side wall of outer shell opening
Also it is in retraction form at the corresponding position in end, the shell, inner cover and sealing ring cooperatively form seal form；And it is described just
Pole piece guides the basal surface for exporting body and being connected to the shell via cathode, and the negative plate guides export body via anode and connects
To the top surface of the inner cover.
Preferably, the height of the side wall of outer shell is less than the height of the rechargeable battery.
Preferably, the bottom of the side wall of outer shell includes retraction part.
Preferably, the side wall of outer shell includes at least one hole, and at least one hole passes through the side wall of outer shell, preferably
Between the top and bottom retraction part of the side wall of outer shell.
Preferably, the hole is rounded, rectangle, square, prismatic or irregular shape.
Preferably, the hole is in irregular strip line style.
Preferably, the rechargeable battery is chargeable button cell.
Preferably, the rechargeable battery is rechargeable lithium ion batteries.
The utility model also proposes a kind of rechargeable battery, and the rechargeable battery includes：Housing, the housing include tool
The shell for having opening, the inner cover being nested in by opening in shell and between shell and inner cover and isolate shell and inner cover
Sealing ring, the shell includes basal surface and side wall of outer shell, and the top of the side wall of outer shell is in retraction form, the inner cover bag
Include top surface and inner cover side wall, the inner cover side wall is also in retraction form at position corresponding with the top of side wall of outer shell, institute
State shell, inner cover and sealing ring and cooperatively form seal form；Battery core is wound, the winding battery core is included after partition is isolated
The positive plate and negative plate of winding, cathode guiding export body is drawn from the end of the positive plate and negative plate respectively and anode is led
Body is guided out, the positive plate guides the basal surface for exporting body and being connected to the shell via cathode, and the negative plate is via negative
Pole guiding export body is connected to the top surface of the inner cover；At least one hole, at least one hole pass through the side wall of outer shell.
Preferably, the rechargeable battery further includes the cutting mechanism of at least one foregoing the utility model, institute
The inside of the column piston part insertion winding battery core of cutting mechanism is stated, and the edge of the expanding unit of the cutting mechanism is close or connect
Touch at least one in cathode guiding export body and anode guiding export body.
Preferably, the bottom of the side wall of outer shell includes retraction part, and at least one hole is located at the side wall of outer shell
Top and bottom retraction part between.
Preferably, the height of the side wall of outer shell is less than the height of the rechargeable lithium ion batteries.
Preferably, the hole is rounded, rectangle, square, prismatic or irregular shape.
Preferably, the hole is in irregular strip line style.
The sealing performance of rechargeable battery according to the present utility model is excellent, has a safety feature.When over-charging of battery, cross put or
When short-circuit, inside battery will produce a large amount of gases, and inner cover can be ejected outwards.When inner cover outwards ejects, inner cover is together with insulating part
When bottom rises to the hole position of shell, gas is discharged from the hole of shell.Since internal pressure reduces, inner cover stops ejecting outward, from
And battery container will not produce and pop and separate.
While inner cover outwards ejects, the battery core in battery is and then moved outward.Cathode and/or anode guiding export body quilt
The cutting mechanism cut-out of the utility model, prevents in battery battery core cathode and shell or anode with inner cover from connecting again, battery end
Only work, it is ensured that safe and reliable.
When using cutting mechanism and exhausting-gas hole at the same time, rechargeable battery can be caused to obtain duplicate protection.
The method for preparing battery case of the utility model is simple and convenient, can efficiently obtain battery case with holes.
Brief description of the drawings
Being expanded on further for the utility model is provided by attached drawing, wherein
Fig. 1 is the sectional view according to the cutting mechanism of one better embodiment of the utility model.
Fig. 2 is the sectional view according to the rechargeable battery with cutting mechanism of one better embodiment of the utility model.
Fig. 3 is the sectional view according to the shell of the rechargeable battery of one better embodiment of the utility model.
Embodiment
One preferred embodiment of the utility model is described in detail now with reference to attached drawing.
The utility model can be used for variously-shaped compact battery, include but not limited to rechargeable battery, for example chargeable
Lithium ion battery, button cell, small-size columnar battery etc..Hereinafter exemplary embodiment party is used as using rechargeable lithium ion batteries
The example of rechargeable battery in formula, it can also be the rechargeable battery of any other form.
Fig. 1 is the cutting mechanism according to one better embodiment of the utility model.As shown in Figure 1, cutting mechanism 21 is formed
For the T-shaped rubber plug of such as " T " shape, including：Column piston part, it is configured as in the winding battery core of insertion rechargeable lithium ion batteries
Portion；Expanding unit, expanding unit are connected with one end of column piston part, and column piston part is substantially perpendicular to expanding unit, wherein opening up
Open at least side in portion or a part of edge be configured as coming close to or in contact with the guiding electrode export body of rechargeable lithium ion batteries,
The bending part that particularly guiding export body extends from cathode/anode, thus in the shell and inner cover of rechargeable lithium ion batteries
Export body cut-out will be guided by expanding unit when separating preset distance.When in use, cutting mechanism 21 can be positioned over winding battery core
Center.
Cutting material suitable for the utility model can be the material that hardness is enough to cut off guiding electrode export body.One
In a embodiment, T-shaped rubber plug can be made of insulation resistant material PP or PEEK or other insulating polymeric materials.
The expanding unit of T-shaped rubber plug can be circular expanding unit.The thickness of the circular piece of expansion can be 0.01~
0.20mm, preferably 0.05mm.The expanding unit of T-shaped rubber plug can also be circle, ellipse, prismatic, triangle, square or length
It is square.The column piston part of T-shaped rubber plug can be solid core or hollow, it is therefore preferable to hollow body.As shown in Figure 1, it is in column piston part
In the case of hollow, expanding unit is also hollow with the position that column piston part is connected, thus in the T-shaped rubber plug of hollow, electrolyte
The other end of winding battery core can be flow to rapidly from one end of winding battery core, be conducive to accelerate the flowing and absorption of electrolyte.
Embodiment as shown in Figure 2, shows the battery of the cutting mechanism 21 including being closed in housing, wherein cutting machine
Structure 21 is arranged on side of the positive electrode, and cathode guiding export body 20 is positioned over through 90 ° of bendings below the expanding unit of cutting mechanism.Cutting mechanism
It can also be arranged in negative side, and the anode guiding export body for winding the negative plate of battery core is positioned over cutting machine through 90 ° of bendings
Put on the expanding unit of structure.It is of course also possible to set a cutting mechanism respectively in side of the positive electrode and negative side, two cutting machines at this time
The column piston part of structure is all slightly smaller, preferably no more than winds the half of the thickness of battery core, and two cutting mechanisms are respectively from two
The cavity of the centre of a opposite direction insertion winding battery core, is not connected to each other.
In by the molding battery of retraction sealing tech, the expanding unit of cutting mechanism, anode guiding export body/cathode are led
It is guided out on the inside of the basal surface of body and shell and inner cover and mutually fits closely.When being overcharged in battery, putting excessively or is short-circuit, due to just
Lithium ion in negative material is constantly embedded and abjection, positive/negative plate volume can change, and inside battery produces a large amount of gas
Body, inner cover can be ejected outwards at this time, while the battery core in battery can be moved and then outward.The circular expansion edge a of T-shaped rubber plug
Face pressure lives cathode guiding export body or/and anode guiding export body, and the circular expansion edge a faces of T-shaped rubber plug and b faces are in 90 °
Angle.When battery core is moved outwardly to certain distance, i.e., when being separated to a certain distance, T-shaped rubber plug top edge a faces and side face edge
Edge b faces junction forms the knife edge, so as to cut off cathode guiding export body or/and anode guiding export body, makes in battery battery core just
Pole and/or anode cannot connect again with shell, terminate work, reach safe and reliable effect.
Body can also be exported in guiding electrode and tear cable architecture is set with cutting mechanism contact position, to help cutting mechanism to cut
Disconnected guiding export body.
In addition, cutting mechanism can be insulation, it has the function of insulation, and its expanding unit can be located at side of the positive electrode
And/or negative side, also act and cathode and/or anode insulate to avoid the function of short circuit with housing.Thus, cutting mechanism
Using also eliminating to be bonded or other modes cover side of the positive electrode and/or the insulating element of negative side, such as insulating cement.
In the rechargeable battery with cutting mechanism as shown in Figure 2 according to one better embodiment of the utility model
In, rechargeable lithium ion batteries include housing, shell 11 that housing includes mutually being fitting to connection in a sealing fashion, inner cover 12 and close
Seal 13.Shell 11 has opening, and inner cover 12 is nested in shell 11 by opening.Sealing ring 13 is located at shell 11 and inner cover 12
Between and isolate shell and inner cover.Shell 11 and inner cover 12 and at least a portion of sealing ring 13 are circumferentially overlapping.Sealing ring 13 is also
The inner side of inner cover 12 is extended to, the inside groove around the simultaneously openend of inner sealing lid is thus formed at the openend of inner cover.
Side wall of outer shell bottom is radially retracted form, that is, retraction region 26 in circumferential, and the distance that the circumferential direction is radially retracted can be with
Between 0.03~0.30mm, preferably 0.10mm.Also there is the retraction region 27 of circumferential radial form in side wall of outer shell top end,
Inner cover side wall is also in the side wall of retraction form, thus inner cover 12 at the 27 corresponding position of retraction region with side wall of outer shell top
29 push up one ladder of formation of plane 24 with it is connected 28 so that the circumferential diameter of the bottom open end of inner cover 12 is more than the top of inner cover
Face diameter.Thus shell, inner cover and the sealing ring being circumferentially in close contact form seal form.Sealing ring 13 can pass through injection
Or molding die is made.
As shown in Fig. 2, inner cover 12 includes top surface 24 and inner cover side wall 29, in the inside groove and/or inner cover 12 of sealing ring 13
Bottom open end coat within one week sealing glue 15 so that both do not fall out after combining and play sealing function.Shell 11
The inside bottom region of side wall, that is, the inner side of retraction region 26 of side wall of outer shell, and bottom respective regions, can also coat close
Sealing water 14, makes shell 11 be combined with inner cover 12 and sealing ring 13.The overlapped position of three, particularly retraction area
The lap position in domain 26, plays splendid sealing effect.Further, since the top side wall of inner cover 12, the top side wall with inner cover
The sealing ring of contact and side wall of outer shell top are also overlapped, can also further function as the effect of lift-off seal effect.
Due to the presence of ladder connection 28, peripherally and outwardly diameter is more than the top planar diameter of inner cover 12 for the sidewall bottom of inner cover 12, generally
Ground is more than 5~20%, preferably 5~8%.
The non-installation form of shell is as shown in figure 3, including basal surface 23 and side wall of outer shell, basal surface 23 is in side wall of outer shell
About 90 ° and can be continuous and derivable interim form.The bottom of side wall of outer shell is also in retraction form, that is, retraction region
26.The height of shell need to be less than cell height, generally below cell height 10~90%, and preferably 30%.Outer casing bottom week
It is typically the 10~50% of shell height, preferably 20% to the height of retraction.In a preferred embodiment, shell also wraps
At least one hole 25 is included, which passes through side wall of outer shell, for losing heart.
Shell 11 can use can deep draw stretching stainless steel sheet material, pass through metal die punch forming.For example, can be with
Using 304 deep-draw stainless steel substrates or 301L stainless steel substrates, thick piece is preferably more preferably 0.10mm between 0.10mm~0.30mm.
Can also be cold stamping shaped by metal die., can in order to keep smooth inside and outside housing during punch forming shell 11
Punching press lubricating oil is coated on steel disc surface.Stamping forming shell has an outer wall bottom part is circumferential to be radially retracted design.Institute
The circumferential direction stated is radially retracted can be between 0.03~0.30mm, preferably 0.10mm.Inner cover 12 can use can punching stretch
Stainless steel sheet material, passes through hardware dies punch forming.The opening portion of inner cover 12 is abducent form after punching press, and inner cover
Sidepiece bottom and the top surface of inner cover circumferentially form the form of step, i.e., above-mentioned inner cover side wall is corresponding with side wall of outer shell
Position at retraction form.Sealing ring can use organic solvent-resistant electrolyte material, such as can be PP, PEEK, PA,
PET and high molecule nano material, and can be made up of injection or molding die.
In a preferred embodiment, side wall of outer shell is provided with least one hole 25, it is located at the top of side wall of outer shell
Between bottom.More specifically, positioned at side wall of outer shell retraction radial component upper end and between the lower end of side wall of outer shell clip end.
Hole 25 can be shaped by laser beam perforation or mechanical stamping on the prefabricated board before forming shell shape.Hole 25 can be it is circular,
Rectangle, square, prismatic, irregular shape, it is therefore preferable to irregular strip line style, such as more preferably length is 2mm,
The hole of width 0.10mm.In one embodiment, at least one hole along side wall of outer shell circumferentially, such as can be
Two, three, four, or more hole.
Using the rechargeable battery with hole of the preferred embodiment, over-charging of battery, cross put or short circuit in the case of, electricity
Core produces a large amount of gases, and inner cover is ejected, when the bottom of inner cover 12 rises to the position in hole 25 together with the bottom of sealing ring 13, gas
Body can be released from hole 25 so that inside battery gas is released rapidly, so that inner cover 12 will not be ejected outwards again.
Winding battery core is located at the inside of inner cover 12.It is described winding battery core include through partition 17 (also referred to as positive and negative anodes every
The positive plate 16 and negative plate 18 wound after isolating in vitro).Partition can be between positive plate and negative plate, and goes back
It can be located on the outside of negative plate, as long as positive/negative plate can be isolated.Positive plate 16, partition 17 and negative plate 18 are mutual
Interval is wound in a manner of spiral coiling, wherein the outmost turns of winding battery core are wrapped up for the gummed paper for example as partition, it is past
Negative plate, partition (such as membrane), positive plate are inside followed successively by, the membrane of another circle can also be set in the inner side of positive plate
With insulation.Positive plate 16, negative plate 18, partition 17 all can be bar shaped in order to winding.From the positive plate and anode
Cathode guiding export body 20 and anode guiding export body 19 are drawn respectively in the end of piece.Positive plate 16 guides export body via cathode
20 are electrically connected to the basal surface of shell 11, and negative plate 18 guides the top table for exporting body 19 and being electrically connected to inner cover 12 via anode
Face.The cathode guiding export body 20 of 16 end of positive plate is bent into general 90 ° and is close to the inner surface of shell 11.The end of negative plate 18
The anode guiding export body 19 at end is bent into general 90 ° and is close to the top surface of inner cover 12.Positive/negative plate and membrane are close each other
Winding, is full of electrolyte around it.
In a preferred embodiment, anode guiding export body 19 can stick adhesive tape towards battery core one side, such as
Polypropylene or Kapton adhesive tapes, to prevent battery core and anode from short circuit occurs between guiding export body, although when cutting mechanism 21 by
Adhesive tape is not necessary when insulating materials forms.Built-in winding winding battery core outermost end is one or more layers such as two layers isolation
Body, and one circle adhesive tape 30 of outermost end seals, to prevent battery core from loosening.Be inside again negative plate 18 end and anode end
The anode guiding export body 19 that end is burn-on with laser or electric current spot welding.Anode guiding export body 19 can be copper or nickel thin slice, thickness
Degree can be 0.02~0.15mm, preferably 0.03~0.05mm, and adhesive tape can be sticked in thin slice welding position, for example, polypropylene or
Kapton adhesive tapes.It is positive plate 16 and the cathode guiding export body burn-on in positive extremity with laser or electric current spot welding inside again
20.Cathode guiding export body 20 can be that aluminium guides thin slice, and thickness can be 0.02~0.15mm, preferably 0.03~0.05mm.
Membrane separates among positive and negative anodes prevents short circuit.
In one embodiment, cutting mechanism can not be included, will only have hole on the shell.In another embodiment party
In formula, it can only include cutting mechanism, without including hole on the shell.In yet another embodiment, cutting can be included
Hole in structure and shell.
In a preferred embodiment, cutting mechanism as shown in Figure 1 is arranged on below winding battery core, and due to
The column piston part of cutting mechanism is placed in the cavity among battery core, it can prevent the positive/negative plate volume during charge and discharge cycles
Change it is excessive caused by internal resistance increase and failure, so as to ensure that battery has longer cycle life.
Electrolyte is placed in the gap of positive and negative plate.When producing battery, winding battery core is put into insulated ring has been installed
In inner cover, plus electrolyte, and by vacuumizing electrolyte can be accelerated to absorb.Then, shell is covered, battery is placed into sealing
In mould, by sealing the circumferential direction retraction of pressure shell side, circumferential retraction seal casinghousing battery is formed.
In one embodiment, outer laser welding is implemented to having sealed molding battery.Specifically, by positive plate 16
Cathode guiding export body 20 and the inner plane of the bottom surface 23 of shell 11 are welded to each other at solder joint 22-3 and 22-4, make battery core with outside
Shell phase is mutually connected.By the inner surface of the anode of negative plate 18 guiding export body 19 and the top surface 24 of inner cover 12 in solder joint 22-1 and
It is welded to each other at 22-2, battery core is mutually connected with shell.Outer laser welding can use laser spot welder to carry out.
The utility model also proposes a kind of method for the shell for manufacturing foregoing rechargeable lithium ion batteries, including with
Lower step：At least one hole, Ran Houtong will be circumferentially formed on the metal sheet of shell for manufacturing rechargeable lithium ion batteries
Cross shell described in punch forming.
When manufacturing rechargeable lithium ion batteries, punched first on the prefabricated board of the shell of rechargeable lithium ion batteries,
The position in the hole is arranged to the position for being slightly inclined to lower part among the side wall of predetermined shell.The hole can pass through machinery
Punching or laser boring are formed.Then the prefabricated board through punching is molded or suppressed, forms the shell with opening.Molding or compacting
Retraction part can be formed at the same time in the bottom of side wall of outer shell.Using punch forming, the inner cover of rechargeable lithium ion batteries is formed, and
It is stamped and formed out retraction part.Then using the completed volume with positive plate, negative plate and multiple membranes as insulating mechanism
It is placed on around battery core in inner cover.In a preferred embodiment, winding battery core can have been placed in one or two cutting machine
Structure.The cutting mechanism is positioned at winding battery core centre, and the edge of the expanding unit of cutting mechanism is guided against cathode and exported
At least one in body and anode guiding export body, especially guiding exports the bending part of body.Wound to being placed with battery core
Electrolyte is added in lid, and electrolyte is fully infiltrated positive plate, negative plate and membrane, finally will be outer using pressing machine
Shell carries out completely densified with inner cover.
Although the utility model is described with embodiment above, the scope of the utility model is not
It is limited to the limitation of these specific descriptions.For those skilled in the art, embodiment is carried out according to the teaching of this specification
Change or be combined with other schemes and all be will be apparent.
Claims (19)
1. a kind of cutting mechanism for rechargeable battery, it is characterised in that the cutting mechanism includes：
Column piston part, it is configured as being inserted into inside the winding battery core of the rechargeable battery；With
Expanding unit, the expanding unit are connected with one end of the column piston part, and the column piston part is substantially perpendicular to
The expanding unit, wherein at least one side edge of the expanding unit or a part of edge are configured as coming close to or in contact with and described can fill
The guiding electrode of battery exports body and when the shell and inner cover of the rechargeable battery separate preset distance by the exhibition
Open portion and the guiding is exported into body cut-out.
2. cutting mechanism according to claim 1, it is characterised in that：
The material of the cutting mechanism is PP, PEEK or polymer insulation resistant material.
3. cutting mechanism according to claim 1, it is characterised in that：
The expanding unit have selected from sector, circle, ellipse, prismatic, triangle and it is square in a kind of shape.
4. cutting mechanism according to claim 1, it is characterised in that：
The bottom surface and side of the expanding unit form the knife edge when the shell and inner cover of the rechargeable battery separate preset distance,
So as to cut off cathode guiding export body and/or anode guiding export body.
5. cutting mechanism according to claim 4, it is characterised in that：
The bottom surface and side of the expanding unit are in substantially 90 ° of angles.
6. cutting mechanism according to claim 1, it is characterised in that：
The edge of the expanding unit is jagged edge.
7. cutting mechanism according to claim 1, it is characterised in that：
The column piston part is solid or hollow.
8. cutting mechanism according to claim 1, it is characterised in that：
The column piston part is integrally formed by mould punching.
9. a kind of rechargeable battery, it is characterised in that the rechargeable battery includes：
Housing；
Battery core is wound, the winding battery core includes the positive plate and negative plate wound after partition is isolated, from the cathode
The cathode guiding export body and anode guiding export body that the end of piece and negative plate is drawn respectively；With
It is at least one that institute is inserted into according to claim 1-8 any one of them cutting mechanisms, the column piston part of the cutting mechanism
The inside of winding battery core is stated, and the edge of the expanding unit of the cutting mechanism comes close to or in contact with cathode guiding export body and anode
It is at least one in guiding export body.
10. rechargeable battery according to claim 9, it is characterised in that
The edge of the expanding unit of the cutting mechanism is come close to or in contact with cathode guiding export body and anode guiding export body extremely
Bending part one few.
11. rechargeable battery according to claim 9, it is characterised in that
The housing includes the shell with opening, inner cover in shell is nested in by opening and between shell and inner cover
And the sealing ring for isolating shell and inner cover, the shell include basal surface and side wall of outer shell, the side wall of outer shell end is in contracting
Enter form, the inner cover includes top surface and inner cover side wall, and the inner cover side wall is in position corresponding with side wall of outer shell open end
It is also in retraction form to put place, and the shell, inner cover and sealing ring cooperatively form seal form；
And the positive plate guides the basal surface for exporting body and being connected to the shell via cathode, and the negative plate is via anode
Guiding export body is connected to the top surface of the inner cover.
12. rechargeable battery according to claim 9, it is characterised in that
The height of the side wall of outer shell is less than the height of the rechargeable battery.
13. rechargeable battery according to claim 9, it is characterised in that
The bottom of the side wall of outer shell includes retraction part.
14. rechargeable battery according to claim 9, it is characterised in that the side wall of outer shell includes at least one hole, institute
State at least one hole and pass through the side wall of outer shell.
15. rechargeable battery according to claim 14, it is characterised in that at least one hole is located at the shell side
Between the top and bottom retraction part of wall.
16. the rechargeable battery according to claims 14 or 15, it is characterised in that
The hole is rounded, rectangle, square, prismatic or irregular shape.
17. the rechargeable battery according to claims 14 or 15, it is characterised in that
The hole is in irregular strip line style.
18. rechargeable battery according to claim 9, it is characterised in that the rechargeable battery is chargeable button electricity
Pond.
19. rechargeable battery according to claim 9, it is characterised in that the rechargeable battery is chargeable lithium ion
Battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721495882.9U CN207353376U (en) | 2017-11-10 | 2017-11-10 | Cutting mechanism and rechargeable battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721495882.9U CN207353376U (en) | 2017-11-10 | 2017-11-10 | Cutting mechanism and rechargeable battery |
Publications (1)
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