CN112909393A - Battery cover sealing structure, manufacturing method thereof and battery - Google Patents
Battery cover sealing structure, manufacturing method thereof and battery Download PDFInfo
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- CN112909393A CN112909393A CN201911130184.2A CN201911130184A CN112909393A CN 112909393 A CN112909393 A CN 112909393A CN 201911130184 A CN201911130184 A CN 201911130184A CN 112909393 A CN112909393 A CN 112909393A
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- glass fixing
- battery cover
- battery
- central pole
- fixing ring
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- 238000007789 sealing Methods 0.000 title claims abstract description 122
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 239000011521 glass Substances 0.000 claims abstract description 201
- 238000010438 heat treatment Methods 0.000 claims description 38
- 238000001816 cooling Methods 0.000 claims description 34
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 28
- 239000002002 slurry Substances 0.000 claims description 27
- 238000002844 melting Methods 0.000 claims description 24
- 230000008018 melting Effects 0.000 claims description 24
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 17
- 229910052750 molybdenum Inorganic materials 0.000 claims description 17
- 239000011733 molybdenum Substances 0.000 claims description 17
- 239000011888 foil Substances 0.000 claims description 16
- 238000007639 printing Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 239000005388 borosilicate glass Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 abstract description 11
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 description 7
- 239000005365 phosphate glass Substances 0.000 description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/78—Cases; Housings; Encapsulations; Mountings
- H01G11/80—Gaskets; Sealings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/78—Cases; Housings; Encapsulations; Mountings
- H01G11/82—Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a battery cover sealing structure, a manufacturing method thereof and a battery, wherein the battery cover sealing structure comprises a central pole, the central pole is sleeved in a battery cover plate, and an annular gap is formed between the central pole and the battery cover plate; the glass fixing body and the glass fixing ring are sequentially and tightly inserted into the annular gap, and the glass fixing body and the glass fixing ring are sleeved on the central pole; the glass fixing ring is arranged below the glass fixing body, and the upper surface of the glass fixing ring is tightly connected with the lower surface of the glass fixing body; according to the invention, the glass fixing body is arranged between the central pole and the battery cover plate, so that the sealing property and the sealing strength between the central pole and the battery cover plate are effectively improved, the glass fixing ring is arranged between the central pole and the battery cover plate, so that the corrosion of a battery electrolyte to the glass fixing body is avoided, the sealing property of the battery cover sealing structure is improved, and the service life of the battery is further prolonged; the manufacturing method is simple, and the sealing performance of the battery cover is ensured.
Description
Technical Field
The invention relates to the technical field of battery electrode sealing, in particular to a battery cover sealing structure, a manufacturing method thereof and a battery.
Background
Due to the increasingly urgent pressure of energy and environmental protection, many countries compete for developing green energy technologies, among which, the development of lithium batteries and super capacitor batteries is the most rapid, and lithium batteries and super capacitors have the advantages of high energy density, light weight, long service life, green and environmental protection, etc
The existing lithium battery cap is generally sealed by an organic insulating sealing medium, a common glass sealing medium or a common material, the organic insulating sealing medium has short service life and poor sealing property, and electrolyte is not high-temperature resistant and is easy to leak; although the common glass sealing medium can play a role in sealing, when water vapor is mixed into the electrolyte, the generated hydrofluoric acid and the electrolyte have the disadvantages of destroying the sealing and damaging the electrolyte, reducing the service life of the battery and reducing the capacity of the battery and the super capacitor; however, the common material is not satisfactory for sealing the battery cover due to its low sealing performance and structural strength, and is easily broken when the temperature rises, thereby breaking the seal.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a battery cover sealing structure, a manufacturing method thereof and a battery, and aims to solve the technical problem that the sealing performance of the battery cover sealing structure in the prior art is low.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a battery cover sealing structure which comprises a central pole, a battery cover plate, a glass fixing body and a glass fixing ring, wherein the central pole is arranged on the battery cover plate; the central pole column is sleeved in the battery cover plate, and an annular gap is formed between the central pole column and the battery cover plate; the glass fixing body and the glass fixing ring are sequentially and tightly inserted into the annular gap, and the glass fixing body and the glass fixing ring are sleeved on the central pole; the glass fixing ring is arranged below the glass fixing body, and the upper surface of the glass fixing ring is tightly connected with the lower surface of the glass fixing body.
Furthermore, the glass fixing ring is of a circular ring structure, the inner side of the glass fixing ring is connected with the central pole in a melting mode, the outer side of the glass fixing ring is connected with the battery cover plate in a melting mode, and the upper surface of the glass fixing ring is connected with the lower surface of the glass fixing body in a melting mode; the glass fixing ring is made of hydrofluoric acid resistant glass material.
Furthermore, the central pole is an aluminum pole, and the battery cover plate is a stainless steel cover plate; the glass fixing body is of a hollow cylinder structure, the inner side of the glass fixing body is connected with the central pole in a melting mode, and the outer side of the glass fixing body is connected with the battery cover plate in a melting mode; the glass fixing body is made of high borosilicate glass.
The invention also provides a manufacturing method of the battery cover sealing structure, which comprises the following steps:
and 2, arranging a glass fixing ring below the glass fixing body, and enabling the glass fixing ring to be tightly connected with the central pole, the battery cover plate and the glass fixing body respectively to obtain the battery cover sealing structure.
Further, in the step 1, the heating temperature is 920-; the heat preservation time is 10-15 min; and in the cooling process, the cooling rate is 10-15 min.
Further, step 2 specifically includes the following steps:
step 22, inserting a glass fixing ring on the central pole and placing the glass fixing ring below the glass fixing body; under the protection of atmosphere, heating to 600 ℃ and preserving heat for 10-20min to ensure that the glass fixing ring is respectively and tightly connected with the central pole, the battery cover plate and the glass fixing body; and then cooling to room temperature at a cooling rate of 10-15 ℃/min to obtain the battery cover sealing structure.
Further, step 2 specifically includes the following steps:
step 22, injecting the viscous slurry into the annular gap, and heating for 20min at the temperature of 100 ℃; then heating to 150 ℃ for 5min, and keeping the temperature for 20 min; heating to 240 deg.C for 5min, and maintaining the temperature for 20 min; then, under the protection of atmosphere, heating to the temperature of 410-600 ℃, and preserving heat for 10-20 min; forming the viscous slurry to obtain a glass fixing ring, and tightly connecting the glass fixing ring with the central pole, the battery cover plate and the glass fixing body respectively; and then cooling to room temperature at a cooling rate of 10-15 ℃/min to obtain the battery cover sealing structure.
Further, step 2 specifically includes the following steps:
step 22, printing the printing slurry into the annular gap by adopting a printing process, and forming a glass fixing ring below the glass fixing body; heating at 100 deg.C for 20 min; then heating to 150 ℃ for 5min, and keeping the temperature for 20 min; heating to 240 deg.C for 5min, and maintaining the temperature for 20 min; then, under the atmosphere protection, heating to the temperature of 410-; and cooling to room temperature at a cooling rate of 10-15 ℃/min to obtain the battery cover sealing structure.
The invention also provides a battery, which comprises a battery cover sealing structure, a battery shell and battery lugs; the battery cover sealing structure is welded and fixed with the battery shell; the battery tab is welded and fixed on the central pole.
Further, the battery also comprises a molybdenum foil, wherein the molybdenum foil is arranged between the central pole and the battery tab; one end of the molybdenum foil is welded and fixed with the central pole, and the other end of the molybdenum foil is welded and fixed with the battery pole lug.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a battery cover sealing structure, which effectively improves the sealing property and the sealing strength between a central pole and a battery cover plate by arranging a glass fixing body between the central pole and the battery cover plate, avoids the corrosion of a battery electrolyte to the glass fixing body by arranging a glass fixing ring between the central pole and the battery cover plate, effectively improves the sealing property of the battery cover sealing structure, further improves the temperature resistance of a battery, and prolongs the service life of the battery.
Furthermore, the glass fixing ring is made of a hydrofluoric acid-resistant glass material, so that the corrosion of hydrofluoric acid generated in the electrolyte of the battery on the glass fixing body is avoided, the temperature resistance of the battery cover sealing structure is effectively improved, and the temperature resistance of the battery is improved.
The invention also provides a manufacturing method of the battery cover sealing structure, the glass fixing body is connected with the central pole and the battery cover plate in a melting way under a high-temperature environment, so that the sealing and the sealing of the battery cover plate and the central pole are realized, the internal stress generated by the overlarge difference of thermal expansion coefficients of different materials in the sealing process is eliminated through cooling treatment, and the reliability of the sealing and the sealing of the battery cover is ensured; the glass fixing ring is connected with the central pole and the battery cover plate in a melting mode in a high-temperature environment, so that the sealing performance of the battery cover plate and the central pole is improved, the manufacturing method is simple, and the industrial production is met.
Furthermore, the glass blank body with the circular ring structure is directly assembled on the central pole, the glass fixing ring is tightly connected with the central pole, the battery cover plate and the glass fixing body in a high-temperature environment, the internal stress among different materials is reduced by adopting cooling treatment, the sealing performance of the battery cover sealing structure is ensured, the manufacturing process is simple, the cost is low, and the large-scale production is facilitated.
Further, raw materials for manufacturing the glass fixing ring are prepared into viscous slurry, the viscous slurry is injected into the annular gap, the viscous slurry is molded to obtain the glass fixing ring under the condition of heating at variable temperature, and the glass fixing ring is respectively and tightly connected with the central pole, the battery cover plate and the glass fixing body; the viscous slurry is directly formed and immobilized, so that the air gap between the glass fixing ring and the combining surface of the glass fixing body is reduced, the sealing property between the glass fixing ring and the combining surface of the glass fixing body is ensured, and the sealing property of the battery cover sealing structure is effectively improved; the variable temperature heating is adopted, so that the loss of viscous slurry and the sealing failure caused by the loss of the viscous slurry due to the over-high temperature and the reduced viscosity of the viscous slurry are avoided.
Furthermore, the raw materials for manufacturing the glass fixing ring are directly printed below the glass fixing body to form the fixing body through a printing method, the structure consistency of the fixing body is good, and the sealing performance of the battery cover sealing structure is effectively improved.
The invention also provides a battery, and the battery cover sealing structure with corrosion resistance and better sealing performance is adopted, so that the temperature resistance of the battery is improved, the service life of the battery is prolonged, and the performance of the battery is stable.
Furthermore, the molybdenum foil is arranged between the central pole and the battery tab, so that the accurate connection of the central pole and the battery tab is ensured, and the stability of the battery is improved.
Drawings
FIG. 1 is a schematic overall view of a battery cover sealing structure according to the present invention;
FIG. 2 is a schematic top view of a glass fixing body in a sealing structure of a battery cover according to the present invention;
FIG. 3 is a longitudinal sectional view of a glass fixing body in a sealing structure of a battery cover according to the present invention;
FIG. 4 is a schematic top view of a glass retaining ring in a sealing structure for a battery cover according to the present invention;
FIG. 5 is a longitudinal sectional view of a glass fixing ring in a sealing structure of a battery cover according to the present invention;
fig. 6 is a schematic view of a sealing structure of a battery cover in embodiment 1;
fig. 7 is a schematic view of a battery cover sealing structure in embodiment 2;
fig. 8 is a schematic view of a battery cover sealing structure according to embodiment 3;
FIG. 9 is a schematic view of the structure of the battery described in example 4;
fig. 10 is a schematic view of the battery mechanism described in embodiment 5.
The battery comprises a central pole 1, a battery cover plate 2, a glass fixing body 3, a glass fixing ring 4, an annular gap 5, a battery shell 6, a battery tab 7 and a molybdenum foil 8, wherein the battery cover plate is fixed on the central pole through a bolt; 21 pour hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-5, the battery cover sealing structure includes a central pole 1, a battery cover plate 2, a glass fixing body 3 and a glass fixing ring 4; the central pole 1 is sleeved in the battery cover plate 2, and an annular gap 5 is arranged between the central pole 1 and the battery cover plate 2; the glass fixing body 3 and the glass fixing ring 4 are inserted in the annular gap 5, the glass fixing body 3 is arranged above the glass fixing ring 4, and the glass fixing ring 4 is arranged in the battery; the structural sizes of the glass fixing body 3 and the glass fixing ring 4 are matched with the size of the annular gap 5; the glass fixing body 3 is of a hollow cylinder structure, and the size of the glass fixing body 3 is matched with that of the annular gap 5; the glass fixing body 3 is sleeved on the central pole 1, the inner side of the glass fixing body 3 is connected with the central pole 1 in a melting mode, and the outer side of the glass fixing body 3 is connected with the central pole 1 in a melting mode; the glass fixing ring 4 is of a circular ring structure, and the size of the glass fixing ring 4 is matched with that of the annular gap 5; the glass fixing ring 4 is sleeved on the central pole 1, the inner side of the glass fixing ring 4 is connected with the central pole 1 in a melting mode, the outer side of the glass fixing ring 4 is connected with the central pole 1 in a melting mode, and the upper surface of the glass fixing ring 4 is connected with the lower surface of the glass fixing body 3 in a melting mode.
The central pole 1 is a molybdenum pole, the battery cover plate 2 is a stainless steel cover plate, the battery cover plate 2 is provided with a liquid injection hole 21, and electrolyte is injected into the battery through the liquid injection hole 21; the glass fixing body 3 is made of high borosilicate glass; the glass fixing ring 4 is made of hydrofluoric acid resistant glass material; preferably, the hydrofluoric acid resistant glass material is phosphate glass or bismuthate glass; when the glass fixing ring 4 is made of the hydrofluoric acid resistant glass material, the corrosivity of hydrofluoric acid generated in the battery electrolyte to the high borosilicate glass fixing body is avoided, and the sealing performance of the battery cover sealing structure is improved.
According to the battery cover sealing structure, the glass fixing body 3 is arranged between the central pole 1 and the battery cover plate 2, so that the sealing property and the sealing strength between the central pole 1 and the battery cover plate 2 are effectively improved, the glass fixing ring 4 is arranged between the central pole 1 and the battery cover plate 2, the corrosion of hydrofluoric acid generated in battery electrolyte on the high borosilicate glass fixing body is avoided, the sealing property of the battery cover sealing structure is effectively improved, the temperature resistance of a battery is further improved, the performance stability of the battery is ensured, and the service life of the battery is prolonged.
The invention also provides a manufacturing method of the battery cover sealing structure, which comprises the following steps:
and 2, arranging the glass fixing ring 4 below the glass fixing body 3, enabling the glass fixing ring 4 to be respectively in fusion connection with the central pole 1, the battery cover plate 2 and the glass fixing body 3 to obtain the battery cover sealing structure, and cleaning and polishing the battery cover sealing structure.
The manufacturing method of the battery cover sealing structure is simple, the glass fixing body is connected with the central pole and the battery cover plate in a melting mode in a high-temperature environment, the battery cover plate and the central pole are sealed and connected, internal stress generated by too large difference of thermal expansion coefficients of sealing between different materials is eliminated through cooling treatment, and the reliability of sealing of the battery cover is guaranteed; the glass fixing ring is connected with the central pole and the battery cover plate in a melting mode in a high-temperature environment, so that the sealing performance of the battery cover plate and the central pole is improved.
Example 1
As shown in fig. 6, embodiment 1 provides a method for manufacturing a battery cover sealing structure, which includes the following steps:
In this embodiment 1, the glass blank with a circular ring structure is directly assembled on the central pole, the glass fixing ring is tightly connected with the central pole, the battery cover plate and the glass fixing body in a high-temperature environment, and cooling treatment is adopted, so that internal stress among different materials is reduced, the sealing performance of the battery cover sealing structure is ensured, the manufacturing process is simple, the cost is low, and large-scale production is facilitated.
Example 2
As shown in fig. 7, a method for manufacturing a sealing structure of a battery is provided in example 2, and the principle of example 2 is basically the same as that of example 1, except that in step 2, phosphate glass or bismuthate glass is prepared into viscous slurry; injecting the viscous slurry of the phosphate glass or bismuthate glass into the annular gap 5, and heating for 20min at the temperature of 100 ℃; then heating to 150 ℃ for 5min, and keeping the temperature for 20 min; heating to 240 deg.C for 5min, and maintaining the temperature for 20 min; then, under the protection of atmosphere, heating to the temperature of 410-600 ℃, and preserving heat for 10-20 min; forming the viscous slurry to obtain a glass fixing ring 4, and tightly connecting the glass fixing ring 4 with the central pole 1, the battery cover plate 2 and the glass fixing body 3 respectively; and then cooling to room temperature at a cooling rate of 10-15 ℃/min to obtain the battery cover sealing structure, and cleaning and polishing the battery cover sealing structure.
In this embodiment 2, phosphate glass or bismuthate glass is prepared into viscous slurry, the viscous slurry is injected into the annular gap, and under the condition of heating at variable temperature, the viscous slurry is molded to obtain a glass fixing ring, and the glass fixing ring is respectively and tightly connected with the central pole, the battery cover plate and the glass fixing body; the viscous slurry is directly formed and immobilized, so that the air gap between the glass fixing ring and the combining surface of the glass fixing body is reduced, the sealing property between the glass fixing ring and the combining surface of the glass fixing body is ensured, and the sealing property of the battery cover sealing structure is effectively improved; the variable temperature heating is adopted, so that the loss of viscous slurry and the sealing failure caused by the loss of the viscous slurry due to the over-high temperature and the reduced viscosity of the viscous slurry are avoided.
Example 3
As shown in fig. 8, a method for manufacturing a sealing structure of a battery is provided in example 3, and the principle of example 3 is basically the same as that of example 1, except that in step 2, phosphate glass or bismuthate glass is prepared into printing paste; printing the printing paste into the annular gap 5 by adopting a printing process, and heating for 20min at the temperature of 100 ℃; then heating to 150 ℃ for 5min, and keeping the temperature for 20 min; heating to 240 deg.C for 5min, and maintaining the temperature for 20 min; then, under the protection of atmosphere, heating to the temperature of 410-600 ℃, and preserving heat for 10-20 min; forming the viscous slurry to obtain a glass fixing ring 4, and tightly connecting the glass fixing ring 4 with the central pole 1, the battery cover plate 2 and the glass fixing body 3 respectively; then cooling to room temperature at a cooling rate of 10-15 ℃/min to obtain the battery cover sealing structure; and cleaning and polishing the battery cover sealing structure.
In embodiment 3, the printing paste prepared from phosphate glass or bismuthate glass is directly printed below the glass fixing body by a printing method to form the fixing body, the fixing body has good structural consistency, and the sealing performance of the battery cover sealing structure is effectively improved.
According to the battery cover sealing structure, the glass fixing body is arranged between the central pole and the battery cover plate, so that the resistance to water vapor in air is realized, the water vapor in the air is prevented from entering the battery, and the sealing performance of the battery cover is ensured; meanwhile, the glass fixing ring is arranged at the lower end of the glass fixing body, so that the corrosion of hydrofluoric acid generated in the electrolyte of the lithium battery on the glass fixing body is avoided, the sealing performance of the battery cover is effectively improved, the temperature resistance of the battery is improved, and the service life of the battery is prolonged
The invention is suitable for all battery structures which are likely to generate hydrofluoric acid in the battery, and compared with the common glass sealing product, the battery cover sealing structure has the advantages of hydrofluoric acid corrosion resistance; compared with the existing product sealed by high polymer materials, the battery cover sealing structure has the advantages of simple structure, hydrofluoric acid resistance and good sealing property.
Example 4
As shown in fig. 9, the present invention further provides a battery, which comprises a battery cover sealing structure, a battery case 6 and battery tabs 7; the battery cover sealing structure is welded and fixed with the battery shell 6; preferably, the battery cover plate sealing structure is connected with the battery shell 6 through brazing or laser welding; the battery tab 7 is welded and fixed on the central pole 1, the battery tab 7 is made of an aluminum strip, and the aluminum strip and the central pole 1 are welded and fixed by resistance welding.
Example 5
As shown in fig. 10, the present invention provides a battery, which comprises a battery cover sealing structure, a battery case 6, battery tabs 7 and molybdenum foils 8; the battery cover sealing structure is welded and fixed with the battery shell 6; preferably, the battery cover plate sealing structure is connected with the battery shell 6 through brazing or laser welding; the molybdenum foil 8 is arranged between the central pole 1 and the battery tab 7, and the molybdenum foil 8 is vertical to the central pole 1; one end of the molybdenum foil 8 is welded and fixed with the central pole 1, and the other end of the molybdenum foil 8 is welded and fixed with the battery tab 7; the battery tab 7 is made of aluminum strip, and the aluminum strip and the molybdenum foil 8 are welded and fixed by resistance welding.
The battery in the invention is a lithium battery or a super capacitor battery, and the battery has high temperature resistance, long service life and stable performance.
The above description is only illustrative of the preferred embodiments of the present invention, and any structural changes, improvements, modifications, etc. made without departing from the principle of the present invention are deemed to be within the scope of the present invention.
Claims (10)
1. A battery cover sealing structure is characterized by comprising a central pole (1), a battery cover plate (2), a glass fixing body (3) and a glass fixing ring (4); the central pole column (1) is sleeved in the battery cover plate (2), and an annular gap (5) is arranged between the central pole column (1) and the battery cover plate (2); the glass fixing body (3) and the glass fixing ring (4) are sequentially and tightly inserted into the annular gap (5), and the glass fixing body (3) and the glass fixing ring (4) are sleeved on the central pole column (1); the glass fixing ring (4) is arranged below the glass fixing body (3), and the upper surface of the glass fixing ring (4) is tightly connected with the lower surface of the glass fixing body (3).
2. The sealing structure of the battery cover according to claim 1, wherein the glass fixing ring (4) is a circular ring structure, the inner side of the glass fixing ring (4) is connected with the central pole (1) in a melting manner, the outer side of the glass fixing ring (4) is connected with the battery cover plate (2) in a melting manner, and the upper surface of the glass fixing ring (4) is connected with the lower surface of the glass fixing body (3) in a melting manner; the glass fixing ring (4) is made of hydrofluoric acid resistant glass material.
3. The sealing structure of the battery cover according to claim 1, wherein the central pole (1) is an aluminum pole, and the battery cover plate (2) is a stainless steel cover plate; the glass fixing body (3) is of a hollow cylindrical structure, the inner side of the glass fixing body (3) is connected with the central pole column (1) in a melting mode, and the outer side of the glass fixing body (3) is connected with the battery cover plate (2) in a melting mode; the glass fixing body (3) is made of high borosilicate glass.
4. The manufacturing method of the battery cover sealing structure according to any one of claims 1 to 3, comprising the steps of:
step 1, firstly, inserting a central pole (1) on a battery cover plate (2) in an inserting manner, and reserving an annular gap (5) between the central pole (1) and the battery cover plate (2); inserting a glass fixing body (3) into an annular gap (5) between the central pole column (1) and the battery cover plate (2), wherein the glass fixing body (3) is sleeved on the central pole column (1); under the protection of atmosphere, after heating and heat preservation treatment, the glass fixing body (3) is respectively connected with the central pole column (1) and the battery cover plate (2) in a melting way; cooling to room temperature;
and 2, arranging the glass fixing ring (4) below the glass fixing body (3) to enable the glass fixing ring (4) to be tightly connected with the central pole (1), the battery cover plate (2) and the glass fixing body (3) respectively, and obtaining the battery cover sealing structure.
5. The method as claimed in claim 4, wherein the heating temperature is 920-980 ℃ in the step 1; the heat preservation time is 10-15 min; and in the cooling process, the cooling rate is 10-15 min.
6. The manufacturing method of the battery cover sealing structure according to claim 4, wherein the step 2 specifically comprises the following steps:
step 21, manufacturing a glass blank body with a circular ring structure to serve as a glass fixing ring (4);
step 22, inserting the glass fixing ring (4) on the central pole column (1) and placing the glass fixing ring below the glass fixing body (3); under the protection of atmosphere, heating to 600 ℃ and preserving heat for 10-20min to ensure that the glass fixing ring (4) is respectively and tightly connected with the central pole (1), the battery cover plate (2) and the glass fixing body (3); and then cooling to room temperature at a cooling rate of 10-15 ℃/min to obtain the battery cover sealing structure.
7. The manufacturing method of the battery cover sealing structure according to claim 4, wherein the step 2 specifically comprises the following steps:
step 21, preparing raw materials for manufacturing the glass fixing ring (4) into viscous slurry;
step 22, injecting the viscous slurry into the annular gap (5), and heating for 20min at the temperature of 100 ℃; then heating to 150 ℃ for 5min, and keeping the temperature for 20 min; heating to 240 deg.C for 5min, and maintaining the temperature for 20 min; then, under the protection of atmosphere, heating to the temperature of 410-600 ℃, and preserving heat for 10-20 min; forming the viscous slurry to obtain a glass fixing ring (4), and tightly connecting the glass fixing ring (4) with the central pole (1), the battery cover plate (2) and the glass fixing body (3) respectively; and then cooling to room temperature at a cooling rate of 10-15 ℃/min to obtain the battery cover sealing structure.
8. The manufacturing method of the battery cover sealing structure according to claim 4, wherein the step 2 specifically comprises the following steps:
step 21, mixing the raw materials for manufacturing the glass fixing ring (4) in proportion, and preparing to obtain printing slurry;
step 22, printing the printing slurry into an annular gap (5) by adopting a printing process, and forming a glass fixing ring (4) below the glass fixing body (3); heating at 100 deg.C for 20 min; then heating to 150 ℃ for 5min, and keeping the temperature for 20 min; heating to 240 deg.C for 5min, and maintaining the temperature for 20 min; then, under the atmosphere protection, heating to the temperature of 410-; and cooling to room temperature at a cooling rate of 10-15 ℃/min to obtain the battery cover sealing structure.
9. A battery is characterized by comprising a battery cover sealing structure, a battery shell (6) and battery tabs (7); the battery cover sealing structure adopts the battery cover sealing structure as claimed in any one of claims 1 to 4, and the battery cover sealing structure is welded and fixed with the battery shell (6); the battery tab (7) is welded and fixed on the central pole (1).
10. A battery according to claim 9, characterized in that it further comprises a molybdenum foil (8), the molybdenum foil (8) being arranged between the central pole (1) and the battery tab (7); one end of the molybdenum foil (8) is welded and fixed with the central pole (1), and the other end of the molybdenum foil (8) is welded and fixed with the battery tab (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911130184.2A CN112909393A (en) | 2019-11-18 | 2019-11-18 | Battery cover sealing structure, manufacturing method thereof and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911130184.2A CN112909393A (en) | 2019-11-18 | 2019-11-18 | Battery cover sealing structure, manufacturing method thereof and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112909393A true CN112909393A (en) | 2021-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911130184.2A Pending CN112909393A (en) | 2019-11-18 | 2019-11-18 | Battery cover sealing structure, manufacturing method thereof and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112909393A (en) |
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2019
- 2019-11-18 CN CN201911130184.2A patent/CN112909393A/en active Pending
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