CN207052680U - A kind of low temperature resistant button type lithium-manganese battery - Google Patents
A kind of low temperature resistant button type lithium-manganese battery Download PDFInfo
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- CN207052680U CN207052680U CN201621194311.7U CN201621194311U CN207052680U CN 207052680 U CN207052680 U CN 207052680U CN 201621194311 U CN201621194311 U CN 201621194311U CN 207052680 U CN207052680 U CN 207052680U
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- positive pole
- pole block
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- mounting cup
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Abstract
It the utility model is related to a kind of low temperature resistant button type lithium-manganese battery, including plate-like positive cover, plate-like negative cover, lithium piece, positive pole block, barrier film, positive pole block mounting cup, gasket ring, positive pole block is placed in positive pole block mounting cup, for barrier film between the upper surface of the positive pole block and the lower surface of lithium piece, the lower surface of barrier film sets downwardly projecting locating ring；The bottom wall and annular sidewall of positive pole block mounting cup set multiple through holes, the position that is fitted to each other of plate-like negative cover and plate-like positive cover is provided with sealing ring, annular groove is set in the middle part of the inwall of sealing ring, the locating ring of barrier film is placed in annular groove, gasket ring is placed in the inner side of sealing ring, and the lower surface of gasket ring is fixedly linked with the plate-like positive cover, support is formed to the inner ring surface of sealing ring；On the outside of the annular sidewall of positive pole block mounting cup space is left between sealing ring；Electrolyte is placed in the gap between positive pole block mounting cup and sealing ring, so that through hole of the electrolyte through annular sidewall is in contact with positive pole block, realizes electrochemical discharge.
Description
Technical field
Lithium-manganese cell technical field is the utility model is related to, particularly a kind of low temperature resistant button type lithium-manganese battery.
Background technology
Lithium-manganese cell is as one kind in battery, because its small volume, capacitance are applied in many fields greatly.Especially detain
Formula lithium-manganese cell has the advantages of small volume, internal resistance are low, discharge voltage is stable, service life is long.Lithium manganese button in the market
Formula battery, it is made up of negative cover, lithium piece, barrier film, positive plate, electrolyte, insulated enclosure circle and positive cover, positive cover and negative cover
One is formed by press-fit.The new battery just produced, there is gap between its positive plate periphery and insulated enclosure circle
Chamber is used with preserving electrolyte with the electric discharge of battery, and the lithium as GND can gradually use up, and thickness is thinning, and just
But gradually expansion occupies electrolyte cavities to pole piece.The electric discharge middle and later periods is arrived, the positive plate after expansion almost occupies whole electrolysis
Sap cavity, distance is pulled open between such case will cause both positive and negative polarity, occur it is serious separate phenomenon, inside battery is almost formed out
Therefore line state, cell voltage can drastically decline, cause battery to scrap；Especially at low ambient temperatures, the above situation is more practical
It is new aobvious；While in order to improve Li/MnO2The flash-over characteristic and temperature characterisitic of battery, reasonable selection organic electrolyte solution are ten
Divide important.The method generally used both at home and abroad at present is with lithium perchlorate（LiClO4）Make electrolyte, with propylene carbonate ester
（PC）And glycol dimethyl ether（DME）Binary mixture make solvent.In addition, also useful ethyoxyl methoxy vinylbenzene（EME）
Substitute DME and use trifluoromethyl sulfonic acid lithium（LiCF3SO3）Substitute LiClO4's.The Li/MnO manufactured in aforementioned manners2Battery,
Its feature is that it has higher ratio energy（Up to 250 watt-hours/kilogram and 500 watt-hours/liter）, higher electric performance stablity and
Safety in utilization.But it is only suitable in -20 DEG C~+70 DEG C temperature ranges, with 0.25mA/cm2Current density is put for a long time
The occasion of electricity uses, and will be substantially reduced in winter and the discharge performance under the low temperature environment of polar regions.How one kind is obtained
Can the still excellent lithium-manganese cell of discharge performance at low ambient temperatures, be that the technology that those skilled in the art are badly in need of solving is asked
Topic.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of button type lithium-manganese battery for being suitable for low temperature environment.
In order to solve the above technical problems, low temperature resistant button type lithium-manganese battery provided by the utility model, including plate-like positive cover,
Plate-like negative cover, lithium piece, positive pole block, barrier film, positive pole block mounting cup, gasket ring, the positive pole block are placed in positive pole block mounting cup, institute
Barrier film is stated between the upper surface of the positive pole block and the lower surface of the lithium piece, the lower surface setting of the barrier film is downwardly projecting
Locating ring；The bottom wall and annular sidewall of the positive pole block mounting cup set multiple through holes, and the plate-like negative cover and plate-like are just
The position that is fitted to each other of polar cap is provided with sealing ring, sets annular groove in the middle part of the inwall of the sealing ring, the locating ring of barrier film is put
In in the annular groove, space is left between the sealing ring on the outside of the annular sidewall of the positive pole block mounting cup；It is described
Gasket ring is placed in the inner side of the sealing ring, and the lower surface of gasket ring is fixedly linked with the plate-like positive cover, in sealing ring
Anchor ring forms support, spacing for being carried out to the sealing ring, avoids for a long time that interior plate-like is being just backward using rear sealed ring deformation
The center movement of polar cap；Electrolyte is placed in the gap between the positive pole block mounting cup and sealing ring, so that the electrolyte
Through hole through annular sidewall is in contact with the positive pole block, realizes electrochemical discharge；Positive pole block is placed in positive pole block mounting cup, can be with
Effectively positive pole block deformed dilation is avoided to occupy electrolyte cavities, to adapt to the requirement of low temperature environment.
Further, the positive pole block presses one by acetylene black, graphite powder and the binding agent of heat treated manganese dioxide, compression
Certainty ratio is well mixed, and the mass ratio of each component is manganese dioxide：Graphite powder：Acetylene black：Binding agent=（85~88）：（1~3）：（5
~7）：（5~6）；Acetylene black specific area is big, and adsorptivity is strong, has more preferable electric conductivity.
Further, the electrolyte is LiClO4Mixed solvent solution；Mixed solvent solution is by LiClO4、Propylene carbonate
Fat (PC), glycol dimethyl ether (DME) and two luxuriant pentanes (DOL) form, and its quality proportioning is LiClO4:PC:DME:DOL=（10
~12）：（55~60）：（10~15）：（20~25）；DOL, DME, PC have the spies such as higher dielectric constant and low freezing point, higher boiling
Property, the combination of three make it that electrolyte still keeps good electric conductivity at low ambient temperatures, while can accelerate LiClO4Three
Dissolving in first mixed organic solvents system, it may insure that organic bath keeps liquid within the scope of a wide temperature again,
And the viscosity of whole organic bath is relatively low, penetration is stronger.
Further, the positive pole block mounting cup is stainless steel mounting cup, a diameter of 0.5mm of the through hole, adjacent through-holes
Between spacing be 1mm, to obtain more excellent electric conductivity.
The technique effect of utility model：（1）Low temperature resistant button type lithium-manganese battery of the present utility model, relative to prior art,
When temperature is -40 DEG C, still there is good stability, and have Li/MnO2Battery is only capable of working more than -20 DEG C of temperature；
（2）Positive pole block mounting cup with through hole not only can be spacing to the progress of positive pole block, to adapt to low temperature environment, can substitute existing
Collector in lithium-manganese cell；（3）The uniform multiple diameter 0.5mm of the annular sidewall and bottom wall of positive pole mounting cup through hole, effectively
The contact area between positive pole block, electrolyte, positive pole mounting cup is added, more preferable catchment effect can be obtained；（4）Barrier film
Annular sidewall is placed in the annular groove of sealing ring, is easy to assemble, while avoids barrier film along sealing ring axial displacement.
Brief description of the drawings
The utility model is described in further detail with reference to Figure of description：
Fig. 1 is the cross-sectional view of the low temperature resistant button type lithium-manganese battery of the utility model；
Fig. 2 is the cross-sectional view of positive pole block mounting cup of the present utility model；
Fig. 3 is Fig. 2 top view；
Fig. 4 is temperature characteristics figure of the present utility model.
In figure：Plate-like positive cover 1, plate-like negative cover 2, positive pole block 3, lithium piece 4, barrier film 5, sealing ring 6, positive pole block mounting cup
7, through hole 8, annular sidewall 9, bottom wall 10, locating ring 11, gasket ring 12.
Embodiment
Embodiment 1
As shown in Figure 1 to Figure 3, the low temperature resistant button type lithium-manganese battery of the present embodiment, model CR2032, the i.e. low temperature resistant button
A diameter of 20mm of formula lithium-manganese cell, thickness 3.2mm；Including：Plate-like positive cover 1, plate-like negative cover 2, lithium piece 4, positive pole block
3rd, barrier film 5 and positive pole block mounting cup 7, positive pole block 3 are according to mass ratio 85 by manganese dioxide, acetylene black, graphite powder and binding agent：
3：6：Battery anode slurry is configured to after 6 mixing, by being granulated, sieving, then the cylinder of specific thickness is made on roller
Positive pole block 3, the cylindrical positive pole block 3 are placed in positive pole block mounting cup 7, and positive pole block mounting cup 7 is by annular sidewall 9 and circular bottom wall
10 are formed, annular sidewall 9 and the uniform multiple a diameter of 0.5mm of bottom wall 10 through hole 8, are spaced 1mm between each through hole 8, be can be selected
Annular sidewall 9 and bottom wall 10 are obtained after stainless steel plate punching press, then annular sidewall 9 and bottom wall 10 are welded to obtain positive pole block
Mounting cup 7；The bottom wall of positive pole block 3 is in contact with the bottom wall of positive pole block mounting cup 7, and the side wall of positive pole block 3 is interior with annular sidewall 9
Side is in contact, and the upper surface of positive pole block 3 sets barrier film 5, and the lower surface of barrier film 5 sets downwardly projecting locating ring 11；The barrier film 5
Top lithium piece 4 is set, the top covering disk dress negative cover 2 of lithium piece 4, plate-like negative cover 2 is fitted to each other with plate-like positive cover 1
Position is provided with sealing ring 6, sets annular groove in the middle part of the inwall of sealing ring 6, the locating ring 11 of barrier film 5 is placed in annular groove；
Gasket ring 12 is placed in the inner side of sealing ring 6, and the lower surface of gasket ring 12 is fixedly linked with plate-like positive cover 1, to the inner ring of sealing ring 6
Face formed support, sealing ring 6 is carried out it is spacing, avoid sealing ring 6 move radially or for a long time using rear sealing ring 6 deformation after
The center movement of inside plate-like positive cover 1；Space is left between the outside of annular sidewall 9 of positive pole block mounting cup 7 and sealing ring 6,
Electrolyte is placed in the gap between positive pole block mounting cup 7 and sealing ring 6, electrolyte LiClO4Mixed solvent solution, mix
Bonding solvent solution is by LiClO4、Propene carbonate, glycol dimethyl ether and two luxuriant pentanes form, and its quality proportioning is LiClO4:
PC:DME:DOL=10：60：10：20, through hole of the electrolyte through annular sidewall is in contact with positive pole block, realizes electrochemical discharge；Improve
Battery afterwards substantially increases discharge performance under cryogenic, and CR2032 two types batteries are under the conditions of -40 DEG C with perseverance
Resistance 15k Ω are discharged to 2.0V discharge curves as shown in figure 4, discharge performance of the low temperature battery under the conditions of -40 DEG C is conventional batteries
Decades of times.
Positive pole block mounting cup with through hole not only can be spacing to the progress of positive pole block, to adapt to low temperature environment, positive pole peace
The annular sidewall of cup and the uniform multiple diameter 0.5mm of bottom wall through hole are filled, effectively increases positive pole block, electrolyte, positive pole installation
Contact area between cup, can obtain more preferable catchment effect, to adapt to the needs of low temperature environment.
Obviously, above-described embodiment is only intended to clearly illustrate the utility model example, and is not to this reality
With the restriction of new embodiment.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no necessity and possibility to exhaust all the enbodiments.And these
Belong to obvious changes or variations that spirit of the present utility model is extended out still in the scope of protection of the utility model
Among.
Claims (2)
1. a kind of low temperature resistant button type lithium-manganese battery, including：Plate-like positive cover（1）, plate-like negative cover（2）, lithium piece（4）, positive pole block
（3）, barrier film（5）, positive pole block mounting cup（7）, gasket ring（12）, the positive pole block（3）It is placed in positive pole block mounting cup（7）It is interior, it is described
Barrier film（5）Located at the positive pole block（3）Upper surface and the lithium piece（4）Lower surface between, the barrier film（5）Lower surface set
Put downwardly projecting locating ring（11）；The positive pole block mounting cup（7）Bottom wall（10）And annular sidewall（9）Multiple through holes are set
（8）, the plate-like negative cover（2）With plate-like positive cover（1）The position that is fitted to each other be provided with sealing ring（6）, the sealing ring（6）
Inwall in the middle part of set annular groove, barrier film（5）Locating ring（11）It is placed in the annular groove, the gasket ring（12）It is placed in
The sealing ring（6）Inner side, and gasket ring（12）Lower surface and the plate-like positive cover（1）It is fixedly linked, to sealing ring（6）
Inner ring surface formed support；The positive pole block mounting cup（7）Annular sidewall（9）Outside and the sealing ring（6）Between leave
Space；Electrolyte is placed in the positive pole block mounting cup（7）With sealing ring（6）Between gap in so that the electrolyte is through ring
Shape side wall（9）Through hole（8）With the positive pole block（3）It is in contact.
2. low temperature resistant button type lithium-manganese battery according to claim 1, it is characterised in that the positive pole block mounting cup（7）For
Stainless steel mounting cup, the through hole（8）A diameter of 0.5mm, adjacent through-holes（8）Between spacing be 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621194311.7U CN207052680U (en) | 2016-11-07 | 2016-11-07 | A kind of low temperature resistant button type lithium-manganese battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621194311.7U CN207052680U (en) | 2016-11-07 | 2016-11-07 | A kind of low temperature resistant button type lithium-manganese battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207052680U true CN207052680U (en) | 2018-02-27 |
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ID=61488306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621194311.7U Active CN207052680U (en) | 2016-11-07 | 2016-11-07 | A kind of low temperature resistant button type lithium-manganese battery |
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|---|---|
| CN (1) | CN207052680U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563041A (en) * | 2020-12-04 | 2021-03-26 | 上海永铭电子股份有限公司 | Button type super capacitor |
-
2016
- 2016-11-07 CN CN201621194311.7U patent/CN207052680U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563041A (en) * | 2020-12-04 | 2021-03-26 | 上海永铭电子股份有限公司 | Button type super capacitor |
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