CN211320143U - Battery cover sealing structure and battery - Google Patents

Battery cover sealing structure and battery Download PDF

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Publication number
CN211320143U
CN211320143U CN201921997981.6U CN201921997981U CN211320143U CN 211320143 U CN211320143 U CN 211320143U CN 201921997981 U CN201921997981 U CN 201921997981U CN 211320143 U CN211320143 U CN 211320143U
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China
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battery
battery cover
glass
central pole
glass fixing
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Expired - Fee Related
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CN201921997981.6U
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Chinese (zh)
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杜欢阳
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Individual
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Individual
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • 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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Abstract

The utility model discloses a battery cover sealing structure and a battery, which comprises a central pole, wherein the central pole is sleeved in a battery cover plate, and an annular gap is arranged 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; the utility model effectively improves the sealing performance and the sealing strength between the central pole and the battery cover plate by arranging the glass fixing body between the central pole and the battery cover plate, avoids the corrosion of the battery electrolyte to the glass fixing body by arranging the glass fixing ring between the central pole and the battery cover plate, improves the sealing performance of the battery cover sealing structure and further prolongs the service life of the battery; the utility model discloses the preparation method is simple, guarantees battery cover sealing performance.

Description

Battery cover sealing structure and battery
Technical Field
The utility model relates to a battery electrode sealing-in technical field, in particular to battery cover sealing-in structure and battery.
Background
Due to the increasingly urgent pressure of energy and environmental protection, many countries compete to develop green energy technologies, among which, the development of lithium batteries and super capacitors 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.
SUMMERY OF THE UTILITY MODEL
To the technical problem who exists among the prior art, the utility model provides a battery cover sealing structure and battery to solve among the prior art technical problem that battery cover sealing structure sealing performance is low.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
the utility model provides a battery cover sealing structure, which comprises a central pole, a battery cover plate, a glass fixing body and a fixing ring; 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 fixing ring are sequentially and tightly inserted into the annular gap, and the glass fixing body and the fixing ring are sleeved on the central pole; the fixing ring is arranged below the glass fixing body, and the upper surface of the fixing ring is tightly connected with the lower surface of the glass fixing body.
Furthermore, the fixing ring is of a circular ring structure, the inner side of the fixing ring is connected with the central pole in a melting mode, the outer side of the fixing ring is connected with the battery cover plate in a melting mode, and the upper surface of the fixing ring is connected with the lower surface of the glass fixing body in a melting mode.
Furthermore, the fixing ring is made of hydrofluoric acid resistant glass material, and the hydrofluoric acid resistant glass material is phosphate glass or bismuthate glass.
Furthermore, the central pole is a molybdenum pole, and the battery cover plate is a stainless steel cover plate.
Furthermore, 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 and welding mode.
Furthermore, the glass fixing body is made of high borosilicate glass.
The utility model also provides a battery, including battery cover sealing structure and battery case, battery cover sealing structure and battery case welded fastening.
Furthermore, the battery pole lug is welded and fixed with the central pole; the battery tab is made of an aluminum strip, and the aluminum strip and the central pole are welded and fixed by resistance welding.
Further, a molybdenum foil is arranged between the battery tab and the central pole; 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 beneficial effects of the utility model are that:
the utility model provides a battery cover sealing structure through set up the glass fixed body between central utmost point post and battery apron, has effectively improved leakproofness and sealing strength between central utmost point post and the battery apron, through set up the solid fixed ring of glass between central utmost point post and battery apron, has avoided the corruption to the glass fixed body in the battery electrolyte, has effectively improved battery cover sealing structure's sealing performance, and then has promoted the temperature toleration of battery, has prolonged the life-span of 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 utility model also provides a battery has corrosion-resistant, the better battery cover sealing structure of sealing performance through the adoption, has improved the temperature toleration of battery, has prolonged battery life, and battery performance 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 an overall schematic 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 battery cover sealing structure according to the present invention;
fig. 3 is a longitudinal sectional view of a glass fixing body in a battery cover sealing structure according to the present invention;
fig. 4 is a schematic top view of a glass fixing ring in a battery cover sealing structure 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 diagram of the cell structure described in example 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.
A battery cover sealing structure, through set up glass fixed body 3 between central utmost point post 1 and battery apron 2, leakproofness and sealing strength between central utmost point post 1 and the battery apron 2 have effectively been improved, through set up glass solid fixed ring 4 between central utmost point post 1 and battery apron 2, the corruption to the high borosilicate glass fixed body of hydrofluoric acid that has avoided producing in the battery electrolyte, battery cover sealing structure's leakproofness has effectively been improved, and then the temperature resistance of battery has been promoted, the stable performance of battery has been ensured, the life-span of battery has been prolonged.
The utility model discloses a manufacturing method of battery cover sealing structure, including following step:
step 1, firstly, inserting a central pole 1 on a battery cover plate 2, 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 1 and the battery cover plate 2, wherein the glass fixing body 3 is sleeved on the central pole 1; sequentially heating and insulating under the protection of atmosphere, melting and connecting the glass fixing body 3 with the central pole 1 and the battery cover plate 2, cooling and cleaning until the surface of the glass fixing body 3 is bright; wherein, the heating temperature is 920-; the heat preservation time is 10-15 min; cooling at a cooling rate of 10-15 min;
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 of the utility model is simple, the glass fixing body is connected with the central pole and the battery cover plate in a melting way under the high temperature environment, 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 the thermal expansion coefficients of the sealing between different materials 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.
Example 1
As shown in fig. 6, embodiment 1 provides a method for manufacturing a battery cover sealing structure, which includes the following steps:
step 1, cleaning and oxidizing a central pole 1 and a battery cover plate 2;
step 2, inserting the central pole 1 on the battery cover plate 2, 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 1 and the battery cover plate 2, wherein the glass fixing body 3 is sleeved on the central pole 1; sequentially heating and insulating under the protection of atmosphere, melting and connecting the glass fixing body 3 with the central pole 1 and the battery cover plate 2, cooling and cleaning until the surface of the glass fixing body 3 is bright; wherein, the heating temperature is 920-; the heat preservation time is 10-15 min; cooling at a cooling rate of 10-15 min;
step 3, according to the size requirement of the annular gap 5, melting phosphate glass or bismuthate glass, and then manufacturing a glass blank body with a circular ring structure to serve as a glass fixing ring 4; then, the glass fixing ring 4 is inserted and arranged on the central pole 1, and is heated to 600 ℃ under the atmosphere protection condition, and the temperature is kept for 10-20min, so 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 sealing structure, and cleaning and polishing the battery cover sealing structure.
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.
The utility model discloses a battery cover sealing structure, through set up the glass fixed body between central utmost point post and battery cover plate, realized the resistance to vapor in the air, avoided the vapor in the air to get into the battery inside, ensured the sealing performance of battery cover; 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 to 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; compare with current product of sealing-in with macromolecular material, battery cover sealing structure, have simple structure, resistant hydrofluoric acid and leakproofness are good.
Example 4
As shown in fig. 9, the utility model also provides a battery, which comprises a battery cover sealing structure, a battery shell 6 and a battery tab 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, a battery tab 7 and a molybdenum foil 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 utility model provides a battery is lithium cell or super capacitor battery, the battery is high temperature resistant, and is longe-lived, stable performance.
The above description is only illustrative of the preferred embodiments of the present invention, and any variations, modifications, decorations, etc. may be made without departing from the principle of the present invention, and these variations, modifications, decorations, etc. are all considered to be within the scope of the present invention.

Claims (9)

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 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 fixing ring (4) are sequentially and tightly inserted into the annular gap (5), and the glass fixing body (3) and the fixing ring (4) are sleeved on the central pole column (1); the fixing ring (4) is arranged below the glass fixing body (3), and the upper surface of the 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 fixing ring (4) is a circular ring structure, the inner side of the fixing ring (4) is connected with the central pole (1) in a melting manner, the outer side of the fixing ring (4) is connected with the battery cover plate (2) in a melting manner, and the upper surface of the fixing ring (4) is connected with the lower surface of the glass fixing body (3) in a melting manner.
3. The sealing structure of the battery cover according to claim 1, wherein the fixing ring (4) is made of hydrofluoric acid resistant glass material, and the hydrofluoric acid resistant glass material is phosphate glass or bismuthate glass.
4. The sealing structure of the battery cover according to claim 1, wherein the central pole (1) is a molybdenum pole, and the battery cover plate (2) is a stainless steel cover plate.
5. The sealing structure of the battery cover according to claim 1, wherein the glass fixing body (3) is a hollow cylinder structure, the inner side of the glass fixing body (3) is connected with the central pole (1) in a melting way, and the outer side of the glass fixing body (3) is connected with the battery cover plate (2) in a melting way.
6. The sealing structure of a battery cover according to claim 1, wherein the glass fixing body (3) is made of borosilicate glass.
7. A battery is characterized by comprising a battery cover sealing structure and a battery shell; the battery cover sealing structure adopts the battery cover sealing structure as claimed in any one of claims 1 to 6, and the battery cover sealing structure is welded and fixed with the battery shell.
8. The battery according to claim 7, characterized by further comprising a battery tab (7), wherein the battery tab (7) is welded and fixed with 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.
9. A battery according to claim 8, characterized in that a molybdenum foil is arranged between the battery tab (7) and the central pole (1); one end of the molybdenum foil is welded and fixed with the central pole (1), and the other end is welded and fixed with the battery pole ear (7).
CN201921997981.6U 2019-11-18 2019-11-18 Battery cover sealing structure and battery Expired - Fee Related CN211320143U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921997981.6U CN211320143U (en) 2019-11-18 2019-11-18 Battery cover sealing structure and battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921997981.6U CN211320143U (en) 2019-11-18 2019-11-18 Battery cover sealing structure and battery

Publications (1)

Publication Number Publication Date
CN211320143U true CN211320143U (en) 2020-08-21

Family

ID=72080398

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921997981.6U Expired - Fee Related CN211320143U (en) 2019-11-18 2019-11-18 Battery cover sealing structure and battery

Country Status (1)

Country Link
CN (1) CN211320143U (en)

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CF01 Termination of patent right due to non-payment of annual fee

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