CN206116495U - Insulating backplate and use secondary cell of this insulation backplate - Google Patents
Insulating backplate and use secondary cell of this insulation backplate Download PDFInfo
- Publication number
- CN206116495U CN206116495U CN201621063304.3U CN201621063304U CN206116495U CN 206116495 U CN206116495 U CN 206116495U CN 201621063304 U CN201621063304 U CN 201621063304U CN 206116495 U CN206116495 U CN 206116495U
- Authority
- CN
- China
- Prior art keywords
- insulation protective
- protective board
- wall
- hush panel
- width
- 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.)
- Withdrawn - After Issue
Links
- 238000009413 insulation Methods 0.000 title claims description 153
- 238000003466 welding Methods 0.000 claims abstract description 73
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 239000003792 electrolyte Substances 0.000 claims abstract description 12
- 230000001681 protective effect Effects 0.000 claims description 144
- 238000003860 storage Methods 0.000 claims description 15
- 230000002787 reinforcement Effects 0.000 claims description 11
- 239000004020 conductor Substances 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 48
- 230000035900 sweating Effects 0.000 description 14
- 238000010276 construction Methods 0.000 description 10
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 239000002356 single layer Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000004734 Polyphenylene sulfide Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229920001707 polybutylene terephthalate Polymers 0.000 description 3
- 229920000069 polyphenylene sulfide Polymers 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920001774 Perfluoroether Polymers 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- -1 polybutylene terephthalates Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides an insulating backplate and use its secondary cell. Insulating backplate level is placed in secondary cell's battery case, between polar plate group with seal between the board, possess striped opening that the electrode lead that is used for making the polar plate organize wore out and the drain hole that is used for making electrolyte flow through on the surface, have the court on the periphery edge of insulating backplate and seal the lateral wall that the board direction is risen immediately, its characterized in that, lateral wall at least partly is inside and outside bilayer structure, wherein outer layer wall's the height that highly is less than inner wall. According to the utility model discloses, can avoid sealing the welding hole that produces when the board carries out laser welding and welding burnt phenomenon secondary cell to improve the battery security, improve the welding quality, obtain the good battery finished product of outward appearance.
Description
Technical field
This utility model is related to a kind of insulation protective board with specific side wall construction and the secondary cell using it.
Background technology
In recent years, with portable electric appts such as notebook computer, mobile phone, portable data assistance (PDA)
Deng rapid popularization, as its power supply, with high capacity density and the exploitation of the lithium rechargeable battery that is easy to miniaturization more comes
More it is taken seriously.From portable electric appts it is lightweight, be easy to carry about with one from the viewpoint of, also require that the battery as its power supply
Thickness is thinner and miniaturization.
By taking square (platypelloid type) lithium rechargeable battery as an example, as shown in figure 1, secondary cell 1 generally comprises metal system electricity
Pond shell 2, hush panel 3, the insulation protective board 4 being flatly positioned in battery case, it is sealed in what is formed by the battery case and hush panel
Electrolyte (not shown) of the electrode group (not shown) and infiltration of closed intracavity in the electrode group.Hush panel 3 includes riveting
Nail, upper portion insulating piece, cover plate, bottom insulating trip and pad, are successively riveted together these parts by rivet.Insulation protective board
4 between hush panel and pole plate group, is formed by insulant, and the pole plate end for making electrode group is reliably insulated with hush panel.
In rectangular secondary cell, insulation protective board 4 is usually the thin slice of strip, in being formed with surface for flowing through electrolyte
Centre through hole 5 and delivery hole 7 and the strip opening 6 for passing the contact conductor of pole plate group.Additionally, insulation protective board 4
The shape on periphery edge and the inner circumferential mating shapes of battery case, periphery edge is above formed with the side wall 8 erected towards hush panel direction.
Pass through strip opening 6 and via pad and hush panel positioned at the negative wire 9 of the electrode group of the lower section of insulation protective board
Rivet be connected, positive wire 10 is connected by another strip opening 6 with the cover plate of hush panel, and it is exhausted that rivet and cover plate pass through top
Embolium insulate, and cover plate insulated with pad by bottom insulating trip, so as to formed on cover plate except the rivet as negative terminal with
Outward, other positions are the form of positive pole.The cover plate of hush panel and battery case are metal system, the peristome upper end of battery case with
The junction of cover plate is welded as a whole by laser sealing welding, so as to form the secondary cell of sealing.
The assembly technology of lithium ion square secondary cell is usually such：Positive plate is led to negative plate across insulating paper
Cross rolling step and be wound into electrode group, electrode group is inserted in battery case by inserting shell operation, be then placed in insulation protective board, electricity
The negative wire of pole group is passed by the strip opening on insulation protective board, is connected with the pad of hush panel through welding, just
Pole lead is passed by another strip opening on insulation protective board, is connected with the cover plate of hush panel through welding or direct
It is welded on battery case.Then hush panel is placed above it, to hush panel and the joint of the peristome upper end of battery case
Laser sealing welding is carried out, electrolyte is injected by the liquid injection hole in hush panel after the completion of welding, will finally by the welding of envelope bolt
Liquid injection hole is sealed, and becomes complete battery.
When seal welding is carried out to battery case and hush panel using laser, upper end of the laser beam along battery case peristome
It is scanned with the joint of cover plate, makes the metal material melting of composition battery case and cover plate, so as to by battery case and bridge welding
It is connected together, reaches the effect of sealed secondary battery.Now, in order to melt battery case and cover plate, laser needs substantial amounts of energy
Both metal material fusions can be just made, welding process is completed.When being welded using the laser of high-energy, sometimes in envelope
Oralia produces welding hole with the surface of the junction of battery case, or burns nigrescence, forms so-called weldering burnt.Due in prior art
There is the situation of above-mentioned failure welding, the exterior quality for occasionally resulting in resultant battery is bad, the manufacture of battery is improve indirectly
Cost, it is also possible to which the safety issues such as battery leakage occur.
As described above, in prior art, the rectangular secondary cell of secondary cell, particularly small volume cannot be avoided sometimes
The burnt phenomenon of welding hole and weldering produced in laser sealing welding.There are many suppositions to the producing cause of the phenomenon, but not yet propose
Effective solution.As one, in Patent Document 2, the presently done research to laser sealing welding problem is concentrated mainly on
For in the improvement of internal surface of battery shell or hush panel structure, for the pass between the insulation protective board below welding quality and hush panel
System, there is not yet any research and report.
Prior art literature
Patent documentation
Patent documentation 1：Chinese utility model CN205016578U
Patent documentation 2：Japanese Unexamined Patent Publication 10-284018
Utility model content
The purpose of this utility model is to provide a kind of insulation protective board, by using specific side wall construction, can be significantly
Reduction has used weldering of the secondary cell of the insulation protective board with the side wall construction in laser sealing welding operation burnt or welding hole
A problem that.
Insulation protective board of the present utility model is placed horizontally in the battery case of secondary cell, between pole plate group and hush panel it
Between, possess the strip opening for passing the contact conductor of pole plate group and the delivery hole for flowing through electrolyte on surface,
The periphery of the insulation protective board is on the side wall erected towards hush panel direction, it is characterised in that at least the one of the side wall
Part is interior outer double-layer structure, wherein height of the height of outer wall less than inner layer wall.
When the secondary cell is rectangular secondary cell, the insulation protective board is strip, at least in the insulation shield
Two end regions of the length direction of plate, the side wall is interior outer double-layer structure, wherein height of the height of outer wall less than inner layer wall
Degree.
Preferably, further the insulation protective board length direction middle section, the side wall be inside and outside bilayer
Height of the height of structure, wherein outer wall less than inner layer wall.
Preferably, the insulation protective board length direction middle section, the outer wall and the inner layer wall it
Between have groove.
Preferably, the backplate height H of the insulation protective board be equal to the inner layer wall height, the outer wall with it is described
Difference in height h of inner layer wall meets following formula：0.2mm ＜ h ＜ H.
Preferably, the insulation protective board forms the arcuation end of tapering width in two end regions of length direction,
The side wall is not formed in the top end of the arcuation end.
Preferably, on the surface of the arcuation end, it is provided with the reinforcement for extending in the width direction.
Preferably, on the outer surface of the outer wall of the arcuation end, salient point is further set.
Preferably, the strip opening is formed in the middle section, and phase along the length direction of the insulation protective board
The center of the length direction of the insulation protective board is asymmetrically formed.
Preferably, the strip opening is formed on the surface of the middle section, in the both sides of the strip opening
The reinforcement for extending in the width direction is provided with, the reinforcement constitutes the storage electrode with the inner layer wall of the middle section
The lead incorporating section of lead.
Preferably, the backplate width E of the insulation protective board is equal to the outer layer of the width both sides of two end regions
The distance between outer surface of wall, and the backplate width E and in the housing of the battery case minor axis D relation meet：E-D=
0.10～0.20mm.
Preferably, the storage width F of the lead incorporating section is equal to the interior of the width both sides of the middle section
The distance between inner surface of layer wall, and the relation satisfaction of the storage width F and backplate width E：E-F≥0.4mm.
Preferably, the delivery hole is formed in two end regions along the width of the insulation protective board.
Additionally, secondary cell of the present utility model have hush panel, battery case, the pole plate group being contained in battery case, with
And electrolyte, the hush panel and the battery case are sealed using laser sealing welding, it is characterised in that in the pole plate group
There is above-mentioned insulation protective board and the hush panel between.
It is preferred that the secondary cell is rectangular secondary cell, have between the pole plate group and the hush panel above-mentioned
Insulation protective board.
It is preferred that the bottom edge of the hush panel has chamfering.
According to this utility model, the rectangular secondary cell of secondary cell, especially small volume can be well avoided to exist
The occurrence of failure welding when carrying out laser sealing welding, so as to improve welding quality, obtain the good finished product of outward appearance
Battery, substantially increases the production efficiency of battery, and improves the safety of battery.
Description of the drawings
Fig. 1 is the sectional view of the structure of the rectangular secondary cell 1 for showing schematically the insulation protective board for employing prior art.
Fig. 2 is the top view of the structure of the insulation protective board 4 for showing schematically prior art.Wherein, dotted line frame A area represents exhausted
Two end regions of the length direction of edge backplate, dotted line frame B area represents the middle section of the length direction of insulation protective board.
Fig. 3 is the top view of the structure for showing schematically the insulation protective board that the present inventors study.Wherein, dotted line frame A area
Two end regions of the length direction of insulation protective board are represented, dotted line frame B area represents the middle section of the length direction of insulation protective board.
Fig. 4 (a) and Fig. 4 (b) be respectively the structure of the insulation protective board for showing schematically Fig. 3 A '-A ' lines sectional views and B '-
B ' line sectional views.
Fig. 5 is the top view of the structure for showing schematically insulation protective board of the present utility model 4.
Fig. 6 (a) and Fig. 6 (b) are respectively A '-A ' the line section views of the structure for showing schematically insulation protective board of the present utility model
Figure and B '-B ' line sectional views.
Fig. 7 (a) and Fig. 7 (b) are respectively to utilize A '-A ' lines sectional views and B '-B ' line sectional views to show schematically this practicality
The figure of the size relationship of new insulation protective board.
Fig. 8 is the axonometric chart of the arcuation end construction for showing schematically insulation protective board of the present utility model.
Specific embodiment
The present inventors are to producing welding hole and burnt weldering in the laser sealing welding of secondary cell the reason for is furtherd investigate
After find, the insulation protective board that the generation of the failure welding phenomenon is adopted with hush panel lower section has larger relation, specifically,
The present inventors speculate that the main cause for causing welding hole or welding Jiao is as follows：
(1) when seam welds are carried out to battery case and hush panel using laser, laser beam is opened along battery case upper end
The joint of oral area and cover plate is scanned, and makes the metallic material of composition battery case and cover plate, so as to by battery case and bridge welding
It is connected together, reaches the effect of sealed secondary battery.Now, the high temperature of hush panel and battery case in thousands of degree, the heat
Can be delivered to the insulation protective board below hush panel, cause the plastics for constituting insulation protective board to melt, the plastics of fusing
Gap overflow along between battery case and hush panel and form burr, between insertion hush panel and battery container, and in sealing
Plate surface is nearby burnt nigrescence, forms so-called weldering burnt.
(2) additionally, under the influence of sweating heat, the plastics of fusing drastically gasify at high temperature, also can blow up sometimes
Phenomenon, the plastics blown up fly out with molten metal, therefore form micro- with the junction of battery case in hush panel after cooling down
Little welding hole.
Therefore, the secondary cell of existing employing laser sealing welding causes welding quality not due to there is above-mentioned hidden danger
It is good, and it is possible to which that the safety issues such as battery leakage occur.
Further, present inventors found that, be not that above-mentioned welding hole or weldering all equably occur in all of welding region
Burnt phenomenon, for example, in some secondary cells that the present inventors study, in the middle section of hush panel, above-mentioned failure welding
Odds is relatively low, and in two end regions of hush panel, above-mentioned failure welding odds is greatly increased.
By furtheing investigate to above-mentioned phenomenon, the present inventors have distinguished first the generation of above-mentioned failure welding and position
The side wall construction of the insulation protective board below hush panel is relevant, describes in detail as follows.
Fig. 2 is the top view of the structure of the insulation protective board for showing schematically prior art.If as shown in Fig. 2 from function
On divided, insulation protective board 4 have following two regions：Positioned at length direction two ends two end regions (A areas, below sometimes
Referred to as " two end regions ") and positioned at the middle section (B areas, hereinafter sometimes referred to simply as " middle section ") in length direction central authorities.
Wherein, fixed insulation shield plays mainly using the side wall 8 ' and internal surface of battery shell interference fit for being arranged on width both sides in A areas
The effect of plate and supporting hush panel, is provided with the middle thereof hole 5 for flowing through electrolyte and makes positive and negative electrode lead in B areas
The strip opening 6 for passing through, in order to avoid the negative wire passed from strip opening 6 is contacted with internal surface of battery shell, by middle section
Side wall 8 collectively form lead incorporating section with the reinforcement 11 being formed on the width of the both sides of strip opening 6, for limiting
The movement of negative wire processed.Additionally, the delivery hole 7 that can also be provided for flowing through electrolyte in two end regions (A areas).
Generally, the side wall 8,8 ' of middle section and two end regions adopts single layer structure, outside the side wall 8 ' of two end regions
The inwall of battery case is close on surface, serves the effect of fixed insulation backplate and the hush panel above supporting, now insulation shield
The width (i.e. the distance between outer surface of two side walls 8 ') of plate is slightly more than minor axis in the housing of battery case, forms interference and matches somebody with somebody
Close.And in middle section, the storage width due to needing to limit lead incorporating section, the position of side wall 8 is substantially fixed, generally
Less than minor axis in the housing of battery case.
The present inventors protect to further increase the side wall clamping force of middle section (B areas) in the insulation of secondary cell
Consider in the studying of plate using the structure of double side walls, i.e., in addition to constituting the inner layer wall of lead incorporating section, also outside it
The week side of boss is provided with the outer wall being close to internal surface of battery shell, so as to form interior outer double-layer structure.
Fig. 3 shows schematically the structure of the insulation protective board 4 that the present inventors study, it can be clearly seen that, in middle section
(B areas), side wall is interior outer double-layer structure (8a, 8b), and in two end regions (A areas), side wall is single layer structure (8c).Now, it is
The height of the stably hush panel above supporting, the height of the inner layer wall 8a of middle section and the single layer wall 8c of two end regions
Quite, and a little higher than outer wall 8b.That is, the backplate height of insulation protective board is by the height of the inner layer wall 8a of middle section
Together decide on the height of the side wall 8c of two end regions, and height of the height of the outer wall 8b of middle section less than inner layer wall 8a
Degree.
In order to more clearly represent the difference of the side wall construction of above-mentioned middle section and two end regions, Fig. 4 illustrates earth's surface
A '-A ' the lines sectional views and B '-B ' line sectional views of above-mentioned insulation protective board 4 are shown.A '-A ' the line sectional views of Fig. 4 (a) illustrate two
The single layer wall structure (8c) of end regions (A areas), B '-B ' the line sectional views of Fig. 4 (b) illustrate the bilayer in middle section (B areas)
Side wall construction (8a, 8b).Additionally, as shown in Fig. 4 (b), in order to meet the design needs with regard to receiving width of lead storage area,
Sometimes groove 12 can be set with further between the double side walls 8a and 8b of middle section.
In the case where the secondary cell of the above-mentioned insulation protective board for studying is employed, when the combination to hush panel and battery case
When place carries out laser sealing welding, the time of staying is longer when being scanned due to corner of the laser beam at hush panel two ends, greatly
The sweating heat of amount is concentrated on herein, therefore two end regions (A areas) of insulation protective board, and compared with middle section (B areas), sweating heat is more
The inner side (i.e. the lower section of hush panel) of hush panel is easily accessible, therefore insulation protective board 4 is easier to receive in the side wall 8c of two end regions
Melt to the impact of laser welding heat, gap overflow of the plastics for having melted along between hush panel and battery case and form hair
Side, or blow up together with motlten metal, so as to cause that the burnt phenomenon of welding hole or weldering is formed in hush panel.
And in the middle section (B areas) of hush panel, first, than short, sweating heat is not so good as above-mentioned laser beam residence time
Two end regions (A areas) concentrate like that, and as described above, closer to battery in the double side walls of the middle section of insulation protective board
The height of the outer wall 8b of shell inwall is relatively low compared with the height of inner layer wall 8a, therefore, outer wall 8b is not easily susceptible to laser welding
There is fusing and produce burr or the phenomenon blown up greatly reduces in the impact of heat, the plastics for constituting insulation protective board, can effectively keep away
Exempt from above-mentioned welding hole or the burnt phenomenon of weldering.
This explains why in the secondary cell that the present inventors study, be in two end regions with insulation protective board
The corresponding region in A areas, the burnt phenomenon of above-mentioned welding hole in hush panel or weldering than more serious, and in the middle section with insulation protective board
That is the corresponding region in B areas, hush panel is less to there is above-mentioned failure welding phenomenon.
Based on the studies above, the present inventor proposes following imaginations, in order to thoroughly solve weldering Jiao or welding hole during laser welding
Phenomenon, it is necessary to reduce insulation protective board the side wall for pressing close to internal surface of battery shell be subject to it is welding heat affected and melt probability, be up to
To this purpose, the measure that can be taken is：At least by insulation protective board in laser sealing welding by welding heat affected larger
The side wall in region (hereinafter referred to as " sweating heat concentrated area ") is set as interior outer double-layer structure, and it is low to set the height of outer wall
In inner layer wall.
Such sidewall design effectively prevent in the double side walls of insulation board closer to the outer wall of internal surface of battery shell
Temperature distortion and it is burnt by weldering in embedded weld part or blown up, greatly reduce sending out for failure welding in laser sealing welding operation
It is raw.
With regard to " sweating heat concentrated area ", in the case of rectangular secondary cell, as described above, sweating heat concentrated area is
Two end regions of insulation protective board, and for the battery of other shapes, such as cylindrical battery, sweating heat concentrated area
It can be the whole periphery edge of annular insulation protective board；For the battery with square-section, sweating heat concentrated area can be with
It is each corner of rectangular dielectric backplate.
Below, with reference to Fig. 5～Fig. 8 to the concrete of insulation protective board of the present utility model 4 and the secondary cell for having used it
Form is illustrated.But, this utility model is not limited to following specific specific embodiments.
Insulation protective board of the present utility model 4 horizontally be arranged at electrode group top, between electrode group and hush panel, use
Come in contact and short-circuit in end face and the hush panel of the positive/negative plate for preventing electrode group or with positive and negative lead wires.Fig. 5 is schematic
Ground represents the top view of the structure of insulation protective board of the present utility model.
As shown in figure 5, thin slice of the insulation protective board 4 for strip, the shape on its periphery edge and the battery of rectangular secondary cell
The inwall of shell matches, on the surface of insulation protective board 4 have middle thereof hole 5, middle thereof hole 5 the left and right sides symmetrically
Two strip openings 6 are set, and the negative wire of the electrode group of lower section can be passed from one of strip opening 6, it is upper with being located at
The pad of the hush panel of side is welded and electrically connected, also, the positive wire of the electrode group of lower section can be from another strip opening 6
Pass, weld with the cover plate of hush panel above and electrically connect.The set location of strip opening 6 is limited without special
System, as long as being easy for the position for passing of contact conductor, is preferably provided at the middle section of insulation protective board 4.
In the insulation protective board shown in Fig. 5, two strip openings 6 are formed in central area along the length direction of insulation protective board
Domain, and be asymmetrically formed relative to the center of the length direction of insulation protective board.Due to being symmetrically arranged two strip openings 6,
Can in no direction be put into when therefore placing insulation protective board 4, operate relatively simple.
Furthermore it is preferred that arranging the reinforcement 11 that extends in the width direction, reinforcement 11 and central authorities in the both sides of strip opening 6
The inner layer wall 8a in region constitutes together the lead incorporating section of storage contact conductor.
In addition, in addition to middle thereof hole 5, multiple delivery holes 7 etc. are also provided with insulation protective board 4, so that electric
The injection of solution liquid is more uniformly distributed smooth.As shown in figure 5, delivery hole 7 can be formed in two petiolareas along the width of insulation protective board
Domain.The set location of delivery hole 7 is also not particularly limited, in the left and right sides of the centrally disposed through hole of strip opening 6
In the case of, delivery hole 7 can be arranged on two end regions (A areas) of insulation protective board 4.Additionally, positive wire can also directly with electricity
Pond shell inwall is connected, and in this case, strip opening 6 can be provided only on the one side in middle thereof hole 5.Only arranging unilateral
Strip opening in the case of, delivery hole 7 can also centrally disposed region (B areas).In addition, delivery hole 7 or middle thereof hole 5
Setting be not required, can omit sometimes.
In this utility model, preferred strip opening 6 is the slit of the length direction parallel to insulation protective board, and delivery hole
7 is the long and narrow hole of the width parallel to insulation protective board, by the shape for so arranging strip opening 6 and delivery hole 7, is helped
In the reinforcement for forming length direction and width respectively, the intensity and flexibility of insulation protective board 4 are further enhanced.
Negative wire or positive wire need the backing plate with top or cover plate welding and are electrically connected after passing from strip opening 6
Connect, therefore, need to maintain a certain distance between the upper surface of insulation protective board and the lower surface of hush panel.For this purpose, in insulation shield
The periphery edge of plate 4 is above provided with the side wall erected towards hush panel direction, to maintain certain backplate height.
Insulation protective board of the present utility model is side wall construction with the topmost difference of insulation protective board of prior art
Difference.It is of the present utility model to be characterised by：At least a portion of the side wall is interior outer double-layer structure, and the height of outer wall
Less than the height of inner layer wall, now, the height of whole insulation protective board is determined by inner layer wall.
Inside and outside double-deck side wall be preferably provided at insulation protective board in laser sealing welding be subject to it is welding heat affected compared with
Big region, i.e. " sweating heat concentrated area ".For different battery appearances, the Germ distribution of sweating heat concentrated area is not
Together, therefore, the inside and outside double-deck side wall can be arranged on the complete cycle on periphery edge, it is also possible to be provided only on a portion
On.For rectangular secondary cell, when laser sealing welding is carried out, corner of the laser beam at hush panel two ends is swept
The time of staying is longer when retouching, and sweating heat easily enters two end regions of the insulation protective board of lower section, and two end regions become welding
Hot concentrated area, accordingly, it would be desirable at least double-deck side wall inside and outside above-mentioned is set in two end regions of insulation protective board, wherein
Height of the height of outer wall 8b ' less than inner layer wall 8a '.
And for the battery of other shapes, such as cylindrical battery, because sweating heat is in the outer of insulation protective board
The complete cycle equiblibrium mass distribution on all edges, therefore the inside and outside double-deck side wall can also be arranged on the complete cycle on the periphery edge of insulation protective board
On.
In rectangular secondary cell, as shown in figure 5, needing at least to arrange inside and outside double-deck in two end regions of insulation protective board 4
The height of the side wall of structure, the wherein height of outer wall 8b ' less than inner layer wall 8a '.Additionally, in order to reduce sweating heat to insulation shield
The overall impact of plate, it is also preferred that being further also provided with inside and outside double-deck side in the middle section of the length direction of insulation protective board
The height of wall, the wherein height of outer wall 8b less than inner layer wall 8a.
Additionally, as shown in figure 5, insulation protective board of the present utility model gradually contracts in the two end regions formation width of length direction
Little arcuation end. because secondary cell is easily caused battery mistake in the end of length direction by the extruding of ambient pressure
Heat, thus preferred above-mentioned side wall (8a ', 8b ') it is not formed in the top end of arcuation end.Now, in order to increase insulation protective board
The mechanical strength of two end regions, preferably on the surface of above-mentioned arcuation end, arranges the reinforcement 13 for extending in the width direction.
In order to more clearly represent insulation protective board of the present utility model with the insulation protective board of prior art in side wall construction
On difference, Fig. 6 schematically show A '-A ' the lines sectional views of insulation protective board of the present utility model and B '-B ' line sectional views.Such as
Shown in Fig. 6 (a) and Fig. 6 (b), in two end regions (A areas), the height of the outer wall 8b ' of insulation protective board 4 is less than inner layer wall 8a's '
Highly, and in middle section (B areas), the height of the outer wall 8b of insulation protective board 4 is less than the height of inner layer wall 8a.
In this utility model, as long as meeting the height of the height of outer wall (8b, 8b ') less than inner layer wall (8a, 8a ')
Condition, it is not necessary to which outboard sidewalls must be the profile of the Double-ladder shape of diagram.For example, outer wall (8b, 8b ') or internal layer
The end shape of wall (8a, 8a ') may not be plane, but have acclive inclined-plane or curved surface；The height of side wall also may be used
From outer wall consecutive variations to inner layer wall, i.e., the structure on continuous inclined-plane is formed on the top of whole side wall.Therefore, this specification
In " interior outer double-layer structure " be in order to distinguish the statement of the differing heights of outer wall and inner layer wall and convenient use, if meet
The height of outer wall is less than the condition of the height of inner layer wall, and outer wall and inner layer wall can also be formed as an entirety, substantially
Become single layer structure.
Additionally, as shown in Fig. 6 (b), as described later, for the needs of design, sometimes in the length direction of insulation protective board
Middle section (B areas), can also have groove 12 between outer wall 8b and inner layer wall 8a.
Fig. 7 is the figure of the size relationship for showing schematically insulation protective board of the present utility model.A '-A ' the line section views of Fig. 7 (a)
Figure illustrates the double side walls structure in two end regions (A areas), and B '-B ' the line sectional views of Fig. 7 (b) illustrate middle section (B areas)
Double side walls structure.
As shown in Fig. 7 (a), the backplate width E of insulation protective board is equal to the outer wall 8b ' of the width both sides of two end regions
The distance between outer surface.In order to keep the interference fit of insulation protective board and internal surface of battery shell, backplate width E and battery case
The relation of minor axis D preferably meets in housing：E-D=E-D=0.05～0.30mm, more preferably meets E-D=0.10～0.20mm.
On the other hand, shown in such as Fig. 7 (a) and 7 (b), the backplate height H of insulation protective board 4 is equal to inner layer wall 8a, 8a ' height
Degree, in order to stably support the hush panel of top, preferred backplate height H is tieed up in two end regions and middle section of insulation protective board
Hold constant, i.e., the height of inner layer wall 8a is highly equal with inner layer wall 8a '.
The present inventor is had found by studying, when laser sealing welding is carried out, inner layer wall 8a, 8a of insulation protective board ' and head on
The lower surface of hush panel, so understanding temperature distortion in welding process and staying, causes whole backplate height H to become short 0.1mm
Left and right, and outer wall 8b, 8b ' it is to contact with battery container, melted by heat can produce burr upwards, highly be about
0.2mm.In view of the bottom edge of hush panel, the chamfering of 0.2mm or so is generally set, in order to ensure wall 8b in side during laser welding,
Burr produced by 8b ' fusing deformations will not overflow and clip between battery case and hush panel, inner layer wall 8a, 8a ' and outer wall
8b, 8b ' difference in height h be preferably arranged at least more than 0.2mm.So, even if outer wall 8b, 8b ' being heated generates burr, and should
Burr also can be limited at the chamfering 0.1mm position of hush panel, will not sandwich between hush panel and battery case, so as to effectively prevent
The burnt generation of welding hole or weldering is stopped.Difference in height h can be with identical in middle section and two end regions, it is also possible to different, but is both needed to full
Foot formula：0.2mm ＜ h ＜ H.
Additionally, the numerical range of difference in height h also has certain relation with the whole height H of backplate, in order to keep certain card
With joint efforts, preferred difference in height h meets following formula with backplate height H：H/H=1/3～5/6, preferred scope is h/H=1/2～2/
3。
It is mobile and short in order to effectively avoid contact conductor that position occurs when by foreign impacts as shown in Fig. 7 (b)
Road, in the middle section of insulation protective board lead incorporating section is provided with, and the storage width F of lead incorporating section is according to battery benchmark
Design, typically do not change with the size of insulation protective board and change.As shown in Fig. 7 (b), the numerical value of storage width F is equivalent in
The distance between the inner surface of inner layer wall 8a of width both sides in centre region.It is not vertical in the inner surface of inner layer wall 8a
In the case of, the numerical value of storage width F is the average distance between the inner surface of the inner layer wall 8a of both sides.
In Fig. 4 and Fig. 6 of this specification, show to clearly show that the double-decker of inner layer wall 8a and outer wall 8b
Go out groove 12, but as described above, groove 12 is not required, it is also possible to it is not provided with.
Generally, the single layer designs wall thickness of ectonexine wall is respectively 0.1mm～0.2mm.If the wall thickness of ectonexine wall is excessively thin,
Less than 0.1mm, then insulation protective board can easily bent, and affect the height of whole insulation protective board, therefore, the general wall of inside and outside double side walls
Thickness is typically defined to more than 0.2mm, and now, backplate width E is more than 0.4mm with the difference (E-F) of storage width F, that is, receive
The relation of width F and backplate width E meets：E-F≥0.4mm.If the solid wall of inside and outside layer wall is thicker than thickness, more than 0.2mm,
Then more than 0.4mm, cause the weight of insulation protective board increases the total wall thickness of inside and outside double side walls, is unfavorable for cost-effective.So,
In the case of being not provided with groove 12, generally backplate width E is defined to into below 0.8mm with the difference (E-F) of storage width F.Such as
Fruit is with the change of battery size so that the width of insulation protective board is with increase, the difference (E- of backplate width E and storage width F
F) be more than 0.8mm, in this case, it is undesirable that increase side wall thickness, then can the inner layer wall of middle section with
Groove 12 is set between outer wall, and the width K of groove is that 2 times of side wall total thickness (width is deducted from the difference of (E-F)
Both sides side wall total thickness) obtained from be worth.
Fig. 8 is the axonometric chart of the arcuation end for showing schematically insulation protective board of the present utility model.Due to arcuation end
Width is gradually decreased, and the height reduction of outer wall 8b ', in order to ensure insulation protective board and the interference fit of internal surface of battery shell,
Increase the clamping force of insulation protective board and battery case, salient point 14 is set preferably on the surface of the outer wall 8b ' of above-mentioned arcuation end.
With regard to the composition material of insulation protective board of the present utility model, have no particular limits, can be by such as PP (poly- third
Alkene；Polypropylene), PPS (polyphenylene sulfides；Polyphenylene sulfide), PFA (tetrafluoroethylene-perfluoro alkoxyls
Vinyl ether co-polymer；Tetrafluoroethylene perfluoroalkoxy vinyl ether copolymer) or
PBT (polybutylene terephthalates；Poly (butylene terephthalate)) constitute.
With regard to the manufacture method of insulation protective board of the present utility model, have no particular limits, can adopt generally in the art
The method such as injection mo(u)lding.
Secondary cell of the present utility model has hush panel, battery case, the pole plate group being contained in battery case and electrolysis
Liquid, hush panel is sealed with battery case using laser sealing welding, it is characterised in that on having between pole plate group and hush panel
State the insulation protective board of specific side wall construction.When secondary cell is rectangular secondary cell, the insulation protective board is strip, its
Periphery is accordingly changed along shape, to be fitted close the inwall of battery case.
Further, since hush panel is usually interference fit with battery case, for the ease of insertion, preferably in the bottom surface of hush panel
Edge has chamfering.
Secondary cell of the present utility model can be made by method shown below.First, prepare to be connected with positive wire
Positive plate and the negative plate for being connected with negative wire.Then, mutually extended to same direction with positive wire and negative wire
Mode configures positive plate and negative plate, and positive plate and negative plate are wound across insulating paper.At this point it is possible to make section
After the generally circular electrode group in face, the electrode group flattening is made, it is also possible to by positive plate, negative plate and insulating paper wound on volume
Around with plate (rectangular cross-section).After such electrode group for making is accommodated in battery case, insulation protective board is configured in electricity
On the group of pole.Then, the negative wire of electrode group is passed by the strip opening on insulation protective board, through welding and envelope
The pad connection of oralia, positive wire is passed by another strip opening on insulation protective board, through welding and sealing
The cover plate connection of plate.Then hush panel is placed above it, and hush panel is entered with the joint of the peristome upper end of battery case
Row laser sealing welding, the liquid injection hole injection electrolyte after the completion of welding, from cover plate.After injection terminates, sealing bolt is fitted together to
In liquid injection hole, carry out laser welding and seal.Thus, the secondary cell of present embodiment is made.
By the insulation protective board using said structure of the present utility model, can greatly reduce in the sealing to secondary cell
Plate carries out the welding hole of generation and weldering burnt phenomenon during laser welding, ensure that the quality of laser sealing welding, improves battery outward appearance,
And improve the safety of battery.
More than, exemplary explanation has been carried out to the structure of insulation protective board of the present utility model by specific embodiment.
But insulation protective board of the present utility model is not limited to above-mentioned concrete form, various changes can be made.For example, above-mentioned strip
The insulation protective board of shape is readily adaptable for use in other profiles or other kinds of battery, such as cylindrical nickel-hydrogen after appropriate deformation
Battery, platypelloid type lithium ion battery etc..Those skilled in the art can expect in the record category of appended claims
Various modifications or modification, these variations and modification fall within protection domain of the present utility model certainly.
Claims (16)
1. a kind of insulation protective board, it is placed horizontally in the battery case of secondary cell, between pole plate group and hush panel, surface
On possess the strip opening for passing the contact conductor of pole plate group and the delivery hole for flowing through electrolyte, it is described absolutely
The periphery of edge backplate is on the side wall erected towards hush panel direction, it is characterised in that at least a portion of the side wall is
Height of the height of interior outer double-layer structure, wherein outer wall less than inner layer wall.
2. insulation protective board according to claim 1, it is characterised in that the secondary cell is rectangular secondary cell, described
Insulation protective board is strip, at least the insulation protective board length direction two end regions, the side wall is inside and outside double-deck knot
Height of the height of structure, wherein outer wall less than inner layer wall.
3. insulation protective board according to claim 2, it is characterised in that further in the length direction of the insulation protective board
Middle section, the side wall is interior outer double-layer structure, wherein height of the height of outer wall less than inner layer wall.
4. insulation protective board according to claim 3, it is characterised in that in the central area of the length direction of the insulation protective board
Domain, has groove between the outer wall and the inner layer wall.
5. the insulation protective board according to any one of Claims 1 to 4, it is characterised in that the backplate of the insulation protective board is high
Degree H is equal to the height of the inner layer wall, and the outer wall meets following formula with difference in height h of the inner layer wall：0.2mm ＜ h ＜ H.
6. the insulation protective board according to any one of claim 2～4, it is characterised in that the insulation protective board is in length side
To two end regions form the arcuation end of tapering width, the side wall is not formed in the top end of the arcuation end.
7. insulation protective board according to claim 6, it is characterised in that on the surface of the arcuation end, be provided with edge
The reinforcement that width extends.
8. insulation protective board according to claim 6, it is characterised in that in the outer surface of the outer wall of the arcuation end
On, salient point is further set.
9. the insulation protective board according to claim 3 or 4, it is characterised in that the strip opening is along the insulation protective board
Length direction is formed in the middle section, and is asymmetrically formed relative to the center of the length direction of the insulation protective board.
10. insulation protective board according to claim 9, it is characterised in that the strip opening is formed in the middle section
Surface on, be provided with the reinforcement for extending in the width direction in the both sides of the strip opening, the reinforcement with it is described in
The inner layer wall in centre region constitutes the lead incorporating section of the storage contact conductor.
11. insulation protective boards according to claim 3 or 4, it is characterised in that the backplate width E of the insulation protective board is equal to
The distance between outer surface of outer wall of width both sides of two end regions, and the backplate width E and the electricity
The relation of minor axis D meets in the housing of pond shell：E-D=0.10～0.20mm.
12. insulation protective boards according to claim 11, it is characterised in that the storage width F of the lead incorporating section is equal to
The distance between inner surface of inner layer wall of width both sides of the middle section, and the storage width F and the shield
The relation of plate width E meets：E-F≥0.4mm.
13. insulation protective boards according to claim 9, it is characterised in that width of the delivery hole along the insulation protective board
Direction is formed in two end regions.
A kind of 14. secondary cells, it has hush panel, battery case, the pole plate group being contained in battery case and electrolyte, institute
State hush panel to seal using laser sealing welding with the battery case, it is characterised in that in the pole plate group and the sealing
There is the insulation protective board described in claim 1 between plate.
A kind of 15. secondary cells, it has hush panel, battery case, the pole plate group being contained in battery case and electrolyte, institute
State hush panel to seal using laser welding with the battery case, it is characterised in that the secondary cell is rectangular secondary cell,
There is the insulation protective board any one of claim 2～13 between the pole plate group and the hush panel.
16. secondary cells according to claims 14 or 15, it is characterised in that the bottom edge of the hush panel has
Angle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016206895679 | 2016-06-30 | ||
| CN201620689567 | 2016-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206116495U true CN206116495U (en) | 2017-04-19 |
Family
ID=58519133
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610831966.9A Active CN107565079B (en) | 2016-06-30 | 2016-09-19 | Insulation guard plate and secondary battery using the same |
| CN201621063304.3U Withdrawn - After Issue CN206116495U (en) | 2016-06-30 | 2016-09-19 | Insulating backplate and use secondary cell of this insulation backplate |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610831966.9A Active CN107565079B (en) | 2016-06-30 | 2016-09-19 | Insulation guard plate and secondary battery using the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN107565079B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565079A (en) * | 2016-06-30 | 2018-01-09 | 松下能源(无锡)有限公司 | Insulation protective board and the secondary cell using the insulation protective board |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2975345B1 (en) * | 1998-07-28 | 1999-11-10 | 株式会社エヌ・ティ・ティ ファシリティーズ | Cylindrical storage battery |
| CN205016578U (en) * | 2015-09-22 | 2016-02-03 | 丰田自动车株式会社 | Secondary battery |
| CN105576161A (en) * | 2016-02-03 | 2016-05-11 | 深圳市三讯电子有限公司 | Electrode terminal, power battery cover plate assembly and power battery |
| CN107565079B (en) * | 2016-06-30 | 2024-05-10 | 松下新能源(无锡)有限公司 | Insulation guard plate and secondary battery using the same |
-
2016
- 2016-09-19 CN CN201610831966.9A patent/CN107565079B/en active Active
- 2016-09-19 CN CN201621063304.3U patent/CN206116495U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565079A (en) * | 2016-06-30 | 2018-01-09 | 松下能源(无锡)有限公司 | Insulation protective board and the secondary cell using the insulation protective board |
| CN107565079B (en) * | 2016-06-30 | 2024-05-10 | 松下新能源(无锡)有限公司 | Insulation guard plate and secondary battery using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107565079A (en) | 2018-01-09 |
| CN107565079B (en) | 2024-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101682006B (en) | Battery cell and power supply | |
| CN101609903B (en) | Rechargeable battery and manufacturing method thereof | |
| JP4488937B2 (en) | Secondary battery | |
| CN102082286B (en) | Secondary battery and manufacturing method thereof | |
| JP7187667B2 (en) | Electrode member, electrode assembly and secondary battery | |
| CN101523640B (en) | Battery and process for making a battery | |
| CN205429058U (en) | Secondary battery | |
| CN101079475B (en) | Sealing cell | |
| KR101914564B1 (en) | Secondary battery with insulation member | |
| JP2009545850A (en) | Secondary battery having an upper sealing portion with an improved structure | |
| CN102986062B (en) | Enclosed-type battery | |
| CN106537651A (en) | Secondary battery | |
| CN103500844B (en) | cylindrical multi-lug lithium ion battery and preparation method thereof | |
| CN106030859B (en) | The manufacturing method of battery and battery | |
| CN212725431U (en) | Soft-packaged cylindrical battery cell | |
| CN206116495U (en) | Insulating backplate and use secondary cell of this insulation backplate | |
| KR20160026771A (en) | Secondary-battery collector terminal and manufacturing method of secondary battery | |
| CN202217712U (en) | Seal plate assembly for battery and battery with seal plate assembly | |
| CN113809444B (en) | Battery cell | |
| CN105264628A (en) | Thermoresponsive switch and method for manufacturing same | |
| CN102780013A (en) | Lithium-iron disulfide battery and manufacture method thereof | |
| CN100466360C (en) | Cylindrical lithium rechargeable battery | |
| CN219779022U (en) | Converging and sealing integrated structure and large cylindrical battery | |
| CN219180634U (en) | Power battery cover plate and battery | |
| CN112234282A (en) | Battery shell assembly, battery and preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 214028 Plot 59, National High tech Industrial Development Zone, Wuxi City, Jiangsu Province Patentee after: Panasonic New Energy (Wuxi) Co.,Ltd. Country or region after: China Address before: 214028 No. 40 Changjiang Road, New District, Jiangsu, Wuxi Patentee before: PANASONIC ENERGY (WUXI) Co.,Ltd. Country or region before: China |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170419 Effective date of abandoning: 20240510 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20170419 Effective date of abandoning: 20240510 |