CN112652776A - Resistance chemical negative electrode current collecting structure of full-sealed cylindrical lithium primary battery - Google Patents
Resistance chemical negative electrode current collecting structure of full-sealed cylindrical lithium primary battery Download PDFInfo
- Publication number
- CN112652776A CN112652776A CN202011528152.0A CN202011528152A CN112652776A CN 112652776 A CN112652776 A CN 112652776A CN 202011528152 A CN202011528152 A CN 202011528152A CN 112652776 A CN112652776 A CN 112652776A
- Authority
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- China
- Prior art keywords
- battery
- negative electrode
- lithium primary
- shell
- welded
- 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.)
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Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 23
- 239000000126 substance Substances 0.000 title claims abstract description 6
- 239000002390 adhesive tape Substances 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims description 9
- 238000013016 damping Methods 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 208000032953 Device battery issue Diseases 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- YBDACTXVEXNYOU-UHFFFAOYSA-N C(F)(F)(F)F.[Li] Chemical compound C(F)(F)(F)F.[Li] YBDACTXVEXNYOU-UHFFFAOYSA-N 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a resistance chemistry negative pole current collection structure of a fully-sealed cylindrical lithium primary battery, belonging to the technical field of lithium primary batteries, wherein a negative pole lug of the lithium primary battery is led out from the bottom of a battery cell and then is welded with the bottom of a shell; or the cathode lug of the lithium primary battery is led out from the top of the battery cell and then clamped between the shell and the shell cover, and the shell cover are welded together when being welded; characterized in that it at least comprises: a circular ring filling a gap between the battery cell and the shell cover; the adhesive tape is positioned between the negative electrode tab and the shell and is attached to the negative electrode tab; and the width of the adhesive tape is 1.2-2 times of the width of the tab. By adopting the technical scheme, the invention ensures the high reliability of the negative current collection of the battery while hardly increasing the weight of the battery and not reducing the capacity of the battery, and prevents the problem of battery failure caused by the weak strength of the negative current collector in a powerful chemical environment.
Description
Technical Field
The invention belongs to the technical field of lithium carbon fluoride batteries, and particularly relates to a resistance chemistry negative electrode current collection structure of a fully-sealed cylindrical lithium primary battery.
Background
The lithium primary battery has the advantages of high specific energy, low self-discharge rate, good safety and the like, and becomes a preferred system of a chemical power supply. The negative electrode of the lithium primary battery is metal lithium, and the current collecting structure of the cylindrical battery usually adopts a metal current collector such as a nickel strip, a stainless steel strip and the like as a tab, one end of the metal current collector is cold-rolled and compounded with the metal lithium, and the other end of the metal current collector is welded with the shell. However, the metal lithium has the characteristics of adhesion and softness, and the cold rolling structure has low strength, so that in some special application occasions, such as deep space exploration, bullet application and the like, which need high impact resistance, even if an electricity-proof core leaping structure such as a support ring is adopted, the situation that the current collector is stripped from the metal lithium due to the poor strength of the current collection structure, and the battery fails, cannot be avoided.
Disclosure of Invention
The invention provides a resistance-chemistry negative electrode current collection structure of a fully-sealed cylindrical lithium primary battery, which aims to solve the technical problems in the prior art, ensures the high reliability of the negative electrode current collection of the battery while hardly increasing the weight of the battery and not reducing the capacity of the battery, and prevents the battery failure caused by the weak strength of a negative electrode current collector in a strong chemical environment.
The invention aims to provide a resistance chemistry negative pole current collecting structure of a fully-sealed cylindrical lithium primary battery, wherein a negative pole lug of the lithium primary battery is led out from the bottom of a battery cell and then is welded with the bottom of a shell; or the cathode lug of the lithium primary battery is led out from the top of the battery cell and then clamped between the shell and the shell cover, and the shell cover are welded together when being welded; characterized in that it at least comprises:
a circular ring filling a gap between the battery cell and the shell cover;
the adhesive tape is positioned between the negative electrode tab and the shell and is attached to the negative electrode tab; and the width of the adhesive tape is 1.2-2 times of the width of the tab.
Preferably: and if the top of the battery is welded, bending the part of the negative electrode lug higher than the battery core in a Z shape, then pressing the bent part with the shell cover, and then welding, injecting liquid and sealing.
Preferably: the outer side wall of the circular ring is provided with a notch matched with the tab in a vibration damping and bending mode.
The invention has the advantages and positive effects that:
1. the use of support ring can effectively prevent leaping up of electric core, makes electric core have stronger resistance and learns the structure.
2. The scheme of single-sided attachment of the lug is adopted, so that the strength of the current collector is enhanced, and the battery capacity is not influenced.
3. The tab vibration damping bending can effectively prevent the relative movement between the battery core and the current collector, thereby enhancing the reliability of current collection.
4. The method is simple and effective, and does not change any other structure of the battery.
Drawings
FIG. 1 is a front view of a first preferred embodiment of the present invention;
FIG. 2 is an enlarged partial view of the first preferred embodiment of the present invention;
FIG. 3 is a front view of a second preferred embodiment of the present invention;
FIG. 4 is an enlarged partial view of a second preferred embodiment of the present invention;
fig. 5 is a front view of a tab reinforcement in a preferred embodiment of the present invention;
fig. 6 is a rear view of a tab reinforcement in a preferred embodiment of the present invention;
fig. 7 is a graph comparing the effects of the test.
Wherein: 1. a support ring; 2. the tabs are bent in a vibration-damping manner; 3. opening the gap; 4. an electric core; 5. a battery case; 6. a shell cover; 7. and a bottom tab.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
in the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1 to 7:
a resistance chemistry negative pole current collection structure of a full-sealed cylindrical lithium primary battery comprises a battery core 4, a battery shell 5 and a shell cover 6:
the connection between the negative electrode lug and the shell of the cylindrical battery generally has two forms:
one is bottom welding, namely welding the negative electrode lug with the bottom of the shell after being led out from the bottom of the battery core:
one is top welding, that is, the negative tab is led out from the top of the battery cell 4 and then clamped between the battery case 5 and the case cover 6, and is welded together when the battery case 5 and the case cover 6 are welded.
Aiming at two structures, the adopted technical scheme is as follows:
as shown in fig. 3 and 4: when a bottom welding scheme is adopted, a technical scheme of local reinforcement of the support ring 1 and the bottom lug 7 is adopted, the negative lug is led out from the bottom of the battery cell and then welded with the bottom of the shell, and when the bottom is welded, the lug can reliably damp vibration at the bent position of the bottom;
as shown in fig. 1 and 2: when top welding is adopted, because the negative pole lug and the battery cell 4 are integrated, if the part of the lug higher than the battery cell 4 keeps upright, the battery cell is easy to hang up, and the relative movement of the lug and the battery cell is easy to cause the damage of a current collection structure. Therefore, when the cap is in compression joint, a part of tab needs to be reserved as a 'vibration damping' area so as to reduce the relative movement between the tab and the battery cell, the vibration damping area is close to the battery cell, and meanwhile, the relative position is fixed so as to ensure that the tab does not contact with the positive electrode to cause internal short circuit.
The support ring 1 is a circular ring for filling a gap between the battery cell 4 and the shell cover 6, and plays a role in preventing the battery cell from being greatly leaped.
If the top welding mode is adopted, a gap 3 is formed in the support ring 1 and used as a space for the tab to bend 2 in a vibration damping mode.
The local strengthening scheme of the pole lug is as follows. And one side (the outer side during winding) of the negative pole lug close to the shell is attached by adopting an adhesive tape with the width 1.2-2 times that of the lug so as to further improve the structural strength of the current collector, and the other side of the negative pole lug close to the positive pole is not attached so as to ensure that the battery capacity is not lost.
The scheme of bending the tabs in a slow vibration mode is characterized in that when the top of the tabs is welded, the tabs are bent and fixed through notches of the supporting rings, so that the tabs are prevented from contacting the positive pole.
The process comprises the following steps: after the negative electrode lug is in compression joint with a negative electrode, the outer side adhesive tape is wound, then the negative electrode lug and the positive electrode are wound into an electric core, the battery structure shown in the figure 1 is adopted, the support ring is placed between the electric core and the shell cover, if the battery is welded at the top, the part of the negative electrode lug, which is higher than the electric core, in a Z shape is required to be bent and then is in compression joint with the shell cover, and then welding and liquid injection sealing are carried out, so that the structure can effectively improve the resistance mechanical structure of a negative electrode current collector, and the current collector is.
As is evident from fig. 7: the joint of the negative electrode lug and the negative electrode is broken before implementation, and the negative electrode lug and the negative electrode are well connected after implementation.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (3)
1. A resistance chemical negative pole current collecting structure of a fully-sealed cylindrical lithium primary battery is characterized in that a negative pole lug of the lithium primary battery is led out from the bottom of a battery cell and then welded with the bottom of a shell; or the cathode lug of the lithium primary battery is led out from the top of the battery cell and then clamped between the shell and the shell cover, and the shell cover are welded together when being welded; characterized in that it at least comprises:
a circular ring filling a gap between the battery cell and the shell cover;
the adhesive tape is positioned between the negative electrode tab and the shell and is attached to the negative electrode tab; and the width of the adhesive tape is 1.2-2 times of the width of the tab.
2. The mechanical resistance negative electrode current collecting structure of the fully-sealed cylindrical lithium primary battery according to claim 1, wherein if the battery is welded at the top, the part of the negative electrode lug higher than the battery core is bent in a Z shape and then is pressed with the cover, and then welding and liquid injection sealing are carried out.
3. The mechanical resistance negative electrode current collecting structure of the fully-sealed cylindrical lithium primary battery according to claim 2, wherein the outer side wall of the ring is provided with a notch matched with the tab in a vibration-damping and bending mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011528152.0A CN112652776A (en) | 2020-12-22 | 2020-12-22 | Resistance chemical negative electrode current collecting structure of full-sealed cylindrical lithium primary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011528152.0A CN112652776A (en) | 2020-12-22 | 2020-12-22 | Resistance chemical negative electrode current collecting structure of full-sealed cylindrical lithium primary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112652776A true CN112652776A (en) | 2021-04-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011528152.0A Pending CN112652776A (en) | 2020-12-22 | 2020-12-22 | Resistance chemical negative electrode current collecting structure of full-sealed cylindrical lithium primary battery |
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| Country | Link |
|---|---|
| CN (1) | CN112652776A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201562719U (en) * | 2009-07-15 | 2010-08-25 | 深圳邦凯新能源股份有限公司 | Cylindrical battery |
| CN102255100A (en) * | 2010-05-20 | 2011-11-23 | 三星Sdi株式会社 | Secondary battery |
| CN203351704U (en) * | 2013-07-16 | 2013-12-18 | 烟台卓能电池材料有限公司 | Ultra-high-multiplying-power cylindrical lithium iron phosphate battery containing graphene coating |
| CN103730623A (en) * | 2013-12-19 | 2014-04-16 | 周培荣 | End surface welding cylindrical lithium battery |
| CN103855335A (en) * | 2012-11-30 | 2014-06-11 | 武汉昊诚能源科技有限公司 | D-type shockproof lithium manganese battery |
| CN105261724A (en) * | 2014-06-24 | 2016-01-20 | 中山天贸电池有限公司 | Tab bending mold for lithium ion battery and bending method |
| CN205564888U (en) * | 2016-04-22 | 2016-09-07 | 东莞市金穑能源科技有限公司 | Lithium ion battery |
| CN206134799U (en) * | 2016-08-24 | 2017-04-26 | 惠州市元大电子科技有限公司 | Pole lug of lithium cell structure and book utmost point ear clip utensil |
| CN107425172A (en) * | 2016-05-23 | 2017-12-01 | 惠州市鼎合智能装备有限公司 | Battery with Z-shaped bending lug and Z-shaped lug apparatus for bending |
| CN208521975U (en) * | 2018-05-16 | 2019-02-19 | 多氟多（焦作）新能源科技有限公司 | The connection structure of battery cover board and tab |
-
2020
- 2020-12-22 CN CN202011528152.0A patent/CN112652776A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201562719U (en) * | 2009-07-15 | 2010-08-25 | 深圳邦凯新能源股份有限公司 | Cylindrical battery |
| CN102255100A (en) * | 2010-05-20 | 2011-11-23 | 三星Sdi株式会社 | Secondary battery |
| CN103855335A (en) * | 2012-11-30 | 2014-06-11 | 武汉昊诚能源科技有限公司 | D-type shockproof lithium manganese battery |
| CN203351704U (en) * | 2013-07-16 | 2013-12-18 | 烟台卓能电池材料有限公司 | Ultra-high-multiplying-power cylindrical lithium iron phosphate battery containing graphene coating |
| CN103730623A (en) * | 2013-12-19 | 2014-04-16 | 周培荣 | End surface welding cylindrical lithium battery |
| CN105261724A (en) * | 2014-06-24 | 2016-01-20 | 中山天贸电池有限公司 | Tab bending mold for lithium ion battery and bending method |
| CN205564888U (en) * | 2016-04-22 | 2016-09-07 | 东莞市金穑能源科技有限公司 | Lithium ion battery |
| CN107425172A (en) * | 2016-05-23 | 2017-12-01 | 惠州市鼎合智能装备有限公司 | Battery with Z-shaped bending lug and Z-shaped lug apparatus for bending |
| CN206134799U (en) * | 2016-08-24 | 2017-04-26 | 惠州市元大电子科技有限公司 | Pole lug of lithium cell structure and book utmost point ear clip utensil |
| CN208521975U (en) * | 2018-05-16 | 2019-02-19 | 多氟多（焦作）新能源科技有限公司 | The connection structure of battery cover board and tab |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210413 |