CN118315744A - Battery cover and battery - Google Patents
Battery cover and battery Download PDFInfo
- Publication number
- CN118315744A CN118315744A CN202410734720.4A CN202410734720A CN118315744A CN 118315744 A CN118315744 A CN 118315744A CN 202410734720 A CN202410734720 A CN 202410734720A CN 118315744 A CN118315744 A CN 118315744A
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- China
- Prior art keywords
- ring
- sealing ring
- battery cover
- cover plate
- pole
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- 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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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
- H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
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- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
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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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
本发明涉及二次电池技术领域，公开了一种电池盖板及电池，电池盖板，包括：极柱；导电件，与所述极柱连接设置；密封圈，套设于所述极柱上，所述密封圈的底侧与所述导电件抵接；固定组件，套设于所述极柱上，所述固定组件与所述密封圈的顶侧抵接并按压所述密封圈，所述密封圈压缩前所述固定组件与所述密封圈之间具有预留空间；所述密封圈的被压缩体积为V1，所述预留空间的体积为V2，满足0.4V1≤V2≤V1。本发明在密封圈压紧密封时，通过对预留空间的体积限定控制，在保证预留空间被密封圈填满的同时，防止因预留空间的体积过小，导致出现固定组件被密封圈挤压变形的情况。
The present invention relates to the technical field of secondary batteries, and discloses a battery cover and a battery, wherein the battery cover comprises: a pole; a conductive member connected to the pole; a sealing ring sleeved on the pole, the bottom side of the sealing ring abutting against the conductive member; a fixing assembly sleeved on the pole, the fixing assembly abutting against the top side of the sealing ring and pressing the sealing ring, and a reserved space between the fixing assembly and the sealing ring before the sealing ring is compressed; the compressed volume of the sealing ring is V 1 , and the volume of the reserved space is V 2 , satisfying 0.4V 1 ≤V 2 ≤V 1 . The present invention controls the volume of the reserved space when the sealing ring is compressed and sealed, thereby ensuring that the reserved space is filled with the sealing ring, and preventing the fixing assembly from being squeezed and deformed by the sealing ring due to the small volume of the reserved space.
Description
Technical Field
The invention relates to the technical field of secondary batteries, in particular to a battery cover plate and a battery.
Background
With the continuous development of the battery industry, the lithium ion battery is widely used in the fields of vehicles, mobile equipment and the like due to the advantage of high energy density. Wherein, battery apron is as the important component part of guaranteeing battery safety, and the sealing washer in the battery apron plays crucial effect to its sealedly and insulativity.
However, most batteries do not limit the use of a seal ring, resulting in poor sealability of the battery and inability to ensure sealability.
Disclosure of Invention
In view of the above, the invention provides a battery cover plate and a battery, so as to solve the problems that the battery has poor tightness and the sealing performance cannot be ensured.
In a first aspect, the present invention provides a battery cover plate comprising: a pole; the conductive piece is connected with the pole; the sealing ring is sleeved on the pole, and the bottom side of the sealing ring is abutted with the conductive piece; the fixing component is sleeved on the pole, the fixing component is abutted with the top side of the sealing ring and presses the sealing ring, and a reserved space is reserved between the fixing component and the sealing ring before the sealing ring is compressed; the compressed volume of the sealing ring is V 1, the volume of the reserved space is V 2, and 0.4V 1≤V2≤V1 is met.
The beneficial effects are that: when the sealing ring is tightly pressed and sealed, the reserved space is ensured to be filled by the sealing ring through limiting and controlling the volume of the reserved space, and meanwhile, the situation that the fixed assembly is extruded and deformed by the sealing ring due to the fact that the volume of the reserved space is too small is prevented.
In an alternative embodiment, the fixing component comprises a ceramic column and a spacer ring, the ceramic column is connected with the spacer ring, the ceramic column is sleeved on the pole column, the ceramic column is abutted with the sealing ring, the spacer ring is sleeved on the sealing ring, and the ceramic column, the spacer ring and the sealing ring are enclosed to form the reserved space.
The beneficial effects are that: the ceramic column and the space ring play a role in fixing the sealing ring, and meanwhile, the sealing performance of the battery cover plate is further improved.
In an alternative embodiment, the sealing ring comprises a first ring body and a second ring body which are arranged in a layered manner, the top side of the first ring body is abutted to the ceramic column, the bottom side of the first ring body is connected with the top side of the second ring body, the bottom side of the second ring body is abutted to the conductive piece, the spacer ring is provided with a corresponding surface which is arranged at an opposite interval with the outer ring of the first ring body, the corresponding surface is used for enclosing the reserved space, the spacer ring is sleeved on the second ring body, the compression amount of the sealing ring is a, the inner diameter of the first ring body is b, the outer diameter of the first ring body is c, the inner diameter of the spacer ring at the corresponding surface is d, the height of the reserved space is h, the compressed volume V 1=[π（c/2）2_π（b/2）2 of the sealing ring is x a, and the volume V 2=[π（d/2）2_π（c/2）2 of the reserved space is x h.
In an alternative embodiment, the ceramic posts are brazed to the spacer ring surface; and/or the ceramic column is connected with the surface of the pole column in a brazing way.
The beneficial effects are that: the ceramic column is connected with the spacer ring or the polar column through brazing, so that the ceramic column has high connection strength, good tightness and strong corrosion resistance of a structure after brazing connection.
In an alternative embodiment, the battery cover plate further comprises a top cover body connected to the spacer ring.
In an alternative embodiment, the battery cover plate further comprises an insulating tape, the insulating tape is arranged between the top cover body and the conductive piece, and the insulating tape is connected with the sealing ring; and/or the top cover body is connected with the space ring in a ring welding way.
The beneficial effects are that: by arranging the insulating pad, the insulating effect of the battery cover plate is improved; the top cover body is welded with the spacer ring, so that the sealing effect of the battery cover plate is further enhanced.
In an alternative embodiment, the compression amount of the sealing ring is a, the thickness of the sealing ring is A, and the compression ratio X= (a/A) X100% of the sealing ring is 8% -X-45%.
The beneficial effects are that: through the control to the compressibility of sealing washer, when satisfying sealing performance, prevent that the sealing washer from compressing too greatly and producing plastic deformation, prevent that the life of sealing washer from receiving the influence.
In an alternative embodiment, the pole comprises a column body and a cap body, the column body is connected with the cap body, the conductive member is sleeved on the column body, the sealing ring is sleeved on the column body and arranged between the conductive member and the cap body, and the fixing assembly is sleeved on the column body and arranged between the conductive member and the cap body.
In an alternative embodiment, the post is laser welded to the conductive member.
The beneficial effects are that: the cylinder and the conductive piece are welded by laser, so that the welding speed is high, the welding scar is small, the influence on the insulating property of the material is small, and the insulating property of the battery cover plate is protected.
In a second aspect, the invention also provides a battery, comprising the battery cover plate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a battery cover plate (illustrating that a seal ring is not compressed) according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of the structure at Y in FIG. 1;
Fig. 3 is a schematic diagram of a battery cover plate (illustrating that the sealing ring is not compressed) according to an embodiment of the invention;
fig. 4 is a schematic structural view of a pole according to an embodiment of the present invention.
Reference numerals illustrate:
10. a pole; 11. a column; 12. a cap body; 20. a conductive member; 30. a seal ring; 31. a first ring body; 32. a second ring body; 40. a fixing assembly; 41. a ceramic column; 42. a spacer ring; 50. a top cover body; 60. an insulating tape; 70. reserving a space; 80. the overlapping parts.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiments of the present invention are described below with reference to fig. 1 to 4.
According to an embodiment of the present invention, in one aspect, there is provided a battery cover plate including: the electrode post 10, the conductive member 20, the seal ring 30 and the fixing assembly 40. The conductive piece 20 is connected with the pole 10; the sealing ring 30 is sleeved on the pole 10, and the bottom side of the sealing ring 30 is abutted with the conductive piece 20; the fixing component 40 is sleeved on the pole 10, the fixing component 40 is abutted with the top side of the sealing ring 30 and presses the sealing ring 30, and a reserved space 70 is formed between the fixing component 40 and the sealing ring 30 before the sealing ring 30 is compressed; the compressed volume of the sealing ring 30 is V 1, the volume of the reserved space 70 is V 2, and 0.4V 1≤V2≤V1 is met.
When the battery cover plate of the embodiment is applied, the sealing ring 30 is tightly pressed and sealed, the volume of the reserved space 70 is limited and controlled, so that the reserved space 70 is ensured to be filled by the sealing ring 30, and meanwhile, the situation that the fixing assembly 40 is extruded and deformed by the sealing ring 30 due to the fact that the volume of the reserved space 70 is too small is prevented.
Specifically, referring to fig. 2, a portion surrounded by the long dashed line in fig. 2 is a bonding portion 80, i.e. a portion of the sealing ring that is compressed; the part surrounded by the short dashed line is the reserved space 70.
The actual shape of the overlapping portion 80 and the head space 70 is annular.
It should be noted that, referring to fig. 2, a state of the seal ring 30 in an uncompressed state is shown in the figure, and theoretically, the compressed volume V 1 of the seal ring 30 is equal to the volume of the overlapping portion 80 of the seal ring 30 and the fixing assembly 40 in the figure, after the seal ring 30 is compressed, the overlapping portion 80 shown in fig. 2 is extruded to the reserved space 70, and fills the reserved space 70.
Specifically, referring to fig. 1, the upper part of the drawing is taken as the outside direction of the battery cover, the lower part of the drawing is taken as the inside direction of the battery cover, the sealing ring 30 is arranged on the outside of the conductive member 20, and the fixing component 40 is at least partially arranged on the outside of the sealing ring 30.
It should be noted that, when V 2＜0.4V1 is set, the reserved space 70 is completely filled by the seal ring 30 without any gap, but the spacer ring 42 is deformed by the seal ring 30, which does not meet the requirement; when V 2＞V1 is carried out, the reserved space 70 is not filled by the sealing ring 30, and gaps exist, so that the requirement is not met.
It should be noted that, when the battery cover is assembled, the fixing assembly 40 generates pressure on the sealing ring 30, and the sealing ring 30 is deformed by pressure to fill the reserved space 70.
Specifically, in the present embodiment, the seal ring 30 is a fluororubber seal ring 30.
It should be noted that, in theory, the volume V 2 of the headspace 70 is equal to the compressed volume V 1 of the seal ring 30, but the ratio of V 2 to V 1 needs to be adjusted in consideration of the influence of the material of the seal ring 30.
In one embodiment, as shown in fig. 1 and 2, the fixing assembly 40 includes a ceramic column 41 and a spacer ring 42, the ceramic column 41 is connected with the spacer ring 42, the ceramic column 41 is sleeved on the pole column 10, the ceramic column 41 abuts against the sealing ring 30, the spacer ring 42 is sleeved on the sealing ring 30, and a reserved space 70 is formed by enclosing the ceramic column 41, the spacer ring 42 and the sealing ring 30.
In one embodiment, as shown in fig. 2, the sealing ring 30 includes a first ring body 31 and a second ring body 32 that are layered, the top side of the first ring body 31 is abutted against the ceramic column 41, the bottom side of the first ring body 31 is connected with the top side of the second ring body 32, the spacer ring 42 has a corresponding surface that is disposed opposite to the outer ring of the first ring body 31 at a distance, the corresponding surface is used for enclosing the reserved space 70, the spacer ring 42 is sleeved on the second ring body 32, the bottom side of the second ring body 32 is abutted against the conductive member 20, the compression amount of the sealing ring 30 is a, the inner diameter of the first ring body 31 is b, the outer diameter of the first ring body 31 is c, the inner diameter of the spacer ring 42 at the corresponding surface is d, the height of the reserved space 70 is h, the compressed volume V 1=[π（c/2）2_π（b/2）2 ] ×a of the sealing ring 30, and the volume V 2=[π（d/2）2_π（c/2）2 ] ×h of the reserved space 70.
Specifically, referring to fig. 2, the ceramic column 41 abuts against the first ring body 31 of the seal ring 30, the spacer ring 42 abuts against the second ring body 32 of the seal ring 30, and the reserved space 70 is formed between the ceramic column 41, the spacer ring 42, the first ring body 31 and the second ring body 32.
When the ceramic column 41 is mounted, the ceramic column 41 applies pressure to the surface of the first ring body 31 of the seal ring 30, and the first ring body 31 of the seal ring 30 deforms under force and compresses downward.
Specifically, referring to fig. 3, the spacer ring 42 is divided into a first ring body and a second ring body, the corresponding surfaces are inner diameter surfaces of the first ring body, the first ring body of the spacer ring 42 encloses with the ceramic column 41, the first ring body 31 and the second ring body 32 to form a reserved space 70, the inner diameter of the reserved space 70 is equal to the outer diameter of the first ring body 31, the outer diameter of the reserved space 70 is equal to the inner diameter of the first ring body of the spacer ring 42, and the inner diameter of the first ring body of the spacer ring 42 is d.
Specifically, in the present embodiment, the spacer ring 42 is an aluminum spacer ring.
Of course, in other alternative embodiments, the spacer ring 42 may be of other materials.
It should be noted that, the ceramic column 41 and the spacer ring 42 play a role in fixing the sealing ring 30, and at the same time, the sealing performance of the battery cover plate is further improved.
In one embodiment, ceramic posts 41 are surface brazed to spacer ring 42; the ceramic post 41 is brazed to the surface of the pole 10.
Of course, in other alternative embodiments, the ceramic post 41 and the spacer ring 42 may be joined only by brazing, and the ceramic post 41 and the pole 10 may be joined in other ways; alternatively, only the ceramic post 41 and the pole 10 may be joined by brazing, and the ceramic post 41 and the spacer ring 42 may be joined by other means.
Of course, in other alternative embodiments, other welding methods, such as friction stir welding, may be used for the ceramic posts 41 and spacer rings 42, and for the ceramic posts 41 and pole pieces 10.
The ceramic column 41 is connected with the spacer ring 42 or the pole 10 by brazing, so that the ceramic column has high connection strength, good sealing performance and strong corrosion resistance after brazing connection.
In one embodiment, as shown in fig. 1 and 3, the battery cover plate further includes a top cover body 50, the top cover body 50 being connected with the separator ring 42.
The top cover body 50 is welded to the spacer ring 42.
The cap body 50 serves to prevent the spacer ring 42 from being deformed by expansion after being pressed.
In one embodiment, as shown in fig. 1 and 3, the battery cover plate further includes an insulating tape 60, the insulating tape 60 is disposed between the top cover body 50 and the conductive member 20, and the insulating tape 60 is connected to the sealing ring 30.
Specifically, in the present embodiment, the insulating tape 60 is made of lower plastic.
It is worth to say that, through setting up insulating pad, promoted the insulating effect of battery apron.
In one embodiment, the cap body 50 is welded to the spacer ring 42.
It should be noted that, the welded connection between the top cover body 50 and the spacer ring 42 further enhances the sealing effect of the battery cover plate.
In one embodiment, as shown in fig. 1, the compression amount of the seal ring 30 is a, the thickness of the seal ring 30 is a, and the compression ratio x= (a/a) ×100% of the seal ring 30 satisfies 8% X45%.
The method for measuring the compression amount a of the seal ring 30 is as follows: the center of the post 10 of the battery cover plate was subjected to a cut-off test, and the compressed length of the seal ring 30 was observed under a magnifying glass.
When X is less than 8%, the helium test and the penetrating agent test are failed, and the tightness of the battery cover plate does not meet the requirement; when X is more than 45%, helium test and penetrant test pass, but the sealing ring 30 generates plastic deformation, the strength of the sealing ring 30 is reduced, and the requirement is not met.
By controlling the compression ratio of the seal ring 30, the seal ring 30 is prevented from being plastically deformed due to excessive compression while the sealing performance is satisfied, and the service life of the seal ring 30 is prevented from being affected.
In one embodiment, as shown in fig. 4, the pole 10 includes a column 11 and a cap 12, the column 11 is connected with the cap 12, the conductive member 20 is sleeved on the column 11, the sealing ring 30 is sleeved on the column 11 and is disposed between the conductive member 20 and the cap 12, and the fixing component 40 is sleeved on the column 11 and is disposed between the conductive member 20 and the cap 12.
Specifically, referring to fig. 1 and 4, the ceramic post 41 is sleeved between the sealing ring 30 and the cap 12, and the spacer ring 42 is disposed between the ceramic post 41 and the conductive member 20.
In one embodiment, the post 11 is laser welded to the conductive member 20.
Of course, in other alternative embodiments, other connection methods, such as riveting, may be used for the post 11 and the conductive member 20.
It should be noted that, the cylinder 11 and the conductive member 20 are welded by laser, so that the welding speed is high, the weld scar is small, the influence on the insulating property of the material is small, and the insulating property of the battery cover plate is protected.
Next, a metallographic test was performed on the battery cover plates with different ratios of V 1/ V2, and the compression state at the seal ring 30 and the state of the reserved space 70 were observed, and specific test results are shown in tables 1 and 2.
Table 1 results of the split metallographic test one
Table 2 section metallographic test results two
As can be seen from the test results of table 1, in examples 01 to 12, (V 2/V1) ×100% has a value ranging from 40% to 100%, that is, V 2/V1 has a value ranging from 0.4 to 1, in which case the head space 70 is completely filled with the seal ring 30, there is no gap, and the spacer ring 42 is not deformed by the seal ring 30.
As can be seen from the test results of table 2, in comparative examples 01 to 03, (V 2/V1) ×100% had values of more than 100%, that is, V 2/V1 had values of more than 1, in which case the head space 70 was not filled with the seal ring 30, and a gap was present. Therefore, V 2＞V1, the headspace 70 is not filled by the seal ring 30, and there is a gap, which is not satisfactory.
As can be seen from the test results of table 2, in comparative examples 04 to 07, the values of (V 2/V1) ×100% are all less than 40%, that is, the values of V 2/V1 are all less than 0.4, in which case the head space 70 is completely filled with the seal ring 30, there is no gap, but the spacer ring 42 is deformed by the seal ring 30. Therefore, V 2＜0.4V1, the space 70 is completely filled by the seal ring 30 without any gap, but the spacer ring 42 may be deformed by the seal ring 30, which is not satisfactory.
It should be noted that, in combination with the test results of table 1 and table 2, when 0.4V 1≤V2≤V1 is used, the space 70 is ensured to be filled by the sealing ring 30, and the situation that the fixing assembly 40 is extruded and deformed by the sealing ring 30 due to the too small volume of the space 70 is prevented.
The following was conducted on a battery cover plate having different compression ratios of the seal rings 30, and the sealability test included a helium test and a penetrant test, and the specific test results are shown in tables 3 and 4.
Specifically, the helium test includes: the gas tightness of the battery cover plate was tested using a helium mass spectrometer, and the test required that gas leakage was not generated at the terminal post 10 of the battery cover plate for 30 seconds at a gas pressure of 1.2MPa from inside to outside and from outside to inside, and the leakage rate was measured to be less than 1X 10 -7Pa×m3/s.
Specifically, the penetrant test includes: wash-permeate-develop.
Further, cleaning stains on the surface of the battery cover plate by using a cleaning agent, and standing for 5 to 10 minutes; after the surface of the battery cover plate is dried, applying a penetrating agent, wherein the distance between a nozzle and the surface of the battery cover plate is 20-30 mm, the penetrating time is generally 5-15 min, and the surface of the battery cover plate is kept to be sufficiently wet by the penetrating agent; after the imaging agent is fully and evenly shaken, the battery cover plate is uniformly sprayed at a distance of 300mm, and after the imaging agent is sprayed, the battery cover plate is disassembled for observation.
If no penetrant residue is found in the seal ring 30, the penetrant test is passed.
TABLE 3 results of the tightness test-1
TABLE 4 results of tightness test two
As can be seen from the test results in table 3, in examples 01 to 10, the compression ratio X of the seal ring 30 was in the range of 8% to 45%, and in this case, both the cover helium test and the penetrant test passed, thereby satisfying the sealing performance requirements.
As can be seen from the test results of table 4, in comparative examples 01 to 04, the compression ratio X of the seal ring 30 was less than 8%, in which case neither helium test nor penetrant test passed. Therefore, X < 8%, the helium test and the penetrant test are not passed, and the sealability of the battery cover plate is not satisfied.
As can be seen from the test results of table 4, in each of comparative examples 05 to 08, the compression ratio X of the seal ring 30 was more than 45%, in which case the helium test and the penetrant test passed, but the seal ring 30 was plastically deformed. Therefore, X > 45%, helium test and penetrant test pass, but the seal ring 30 generates plastic deformation, the strength of the seal ring 30 is reduced, and the requirement is not satisfied.
It is to be noted that, when X is 8% or more and 45% or less in combination with the test results of tables 3 and 4, the sealing performance is satisfied while preventing the seal ring 30 from being plastically deformed due to excessive compression, and the service life of the seal ring 30 is prevented from being affected.
According to an embodiment of the present invention, in another aspect, there is also provided a battery including the battery cover plate described above.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.
Claims (8)
1. A battery cover plate, comprising:
A pole;
the conductive piece is connected with the pole;
The sealing ring is sleeved on the pole, and the bottom side of the sealing ring is abutted with the conductive piece;
The fixing component is sleeved on the pole, the fixing component is abutted with the top side of the sealing ring and presses the sealing ring, and a reserved space is reserved between the fixing component and the sealing ring before the sealing ring is compressed;
The compressed volume of the sealing ring is V 1, the volume of the reserved space is V 2, and 0.4V 1≤V2≤V1 is met;
The fixing assembly comprises a ceramic column and a spacer ring, the ceramic column is connected with the spacer ring, the ceramic column is sleeved on the pole column, the ceramic column is abutted with the sealing ring, the spacer ring is sleeved on the sealing ring, and the ceramic column, the spacer ring and the sealing ring are enclosed to form the reserved space;
The sealing ring comprises a first ring body and a second ring body which are arranged in a layered mode, the top side of the first ring body is in butt joint with the ceramic column, the bottom side of the first ring body is connected with the top side of the second ring body, the bottom side of the second ring body is in butt joint with the conductive piece, the spacer ring is provided with a corresponding surface which is arranged at an opposite interval with the outer ring of the first ring body, the corresponding surface is used for enclosing the reserved space, the spacer ring is sleeved on the second ring body, the compression amount of the sealing ring is a, the inner diameter of the first ring body is b, the outer diameter of the first ring body is c, the inner diameter of the spacer ring at the corresponding surface is d, the height of the reserved space is h, the compressed volume V 1=[π（c/2）2_π（b/2）2 ]. Times.a of the sealing ring and the volume V 2=[π（d/2）2_π（c/2）2 ]. Times.h of the reserved space.
2. The battery cover plate of claim 1, wherein the ceramic posts are brazed to the spacer ring surface; and/or the ceramic column is connected with the surface of the pole column in a brazing way.
3. The battery cover plate of claim 1, further comprising a top cap body connected to the spacer ring.
4. The battery cover plate of claim 3, further comprising an insulating tape disposed between the top cap body and the conductive member, the insulating tape being connected to the seal ring; and/or the top cover body is connected with the space ring in a ring welding way.
5. The battery cover plate according to any one of claims 1 to 4, wherein the compression amount of the seal ring is a, the thickness of the seal ring is a, and the compression ratio x= (a/a) ×100% of the seal ring satisfies 8% +.ltoreq.x.ltoreq.45%.
6. The battery cover plate of any one of claims 1-4, wherein the pole comprises a cylinder and a cap, the cylinder is connected with the cap, the conductive member is sleeved on the cylinder, the sealing ring is sleeved on the cylinder and is arranged between the conductive member and the cap, and the fixing assembly is sleeved on the cylinder and is arranged between the conductive member and the cap.
7. The battery cover plate of claim 6, wherein the post is laser welded to the conductive member.
8. A battery comprising the battery cover plate according to any one of claims 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410734720.4A CN118315744B (en) | 2024-06-07 | 2024-06-07 | Battery cover plate and battery |
| PCT/CN2025/099640 WO2025252213A1 (en) | 2024-06-07 | 2025-06-06 | Battery cover plate and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410734720.4A CN118315744B (en) | 2024-06-07 | 2024-06-07 | Battery cover plate and battery |
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| CN118315744A true CN118315744A (en) | 2024-07-09 |
| CN118315744B CN118315744B (en) | 2024-08-20 |
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| CN202410734720.4A Active CN118315744B (en) | 2024-06-07 | 2024-06-07 | Battery cover plate and battery |
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| CN (1) | CN118315744B (en) |
| WO (1) | WO2025252213A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118523019A (en) * | 2024-07-19 | 2024-08-20 | 蜂巢能源科技股份有限公司 | Battery cover, battery and battery pack |
| WO2025252213A1 (en) * | 2024-06-07 | 2025-12-11 | 蜂巢能源科技股份有限公司 | Battery cover plate and battery |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009087729A (en) * | 2007-09-28 | 2009-04-23 | Toshiba Corp | Sealed battery |
| CN216354485U (en) * | 2021-11-15 | 2022-04-19 | 蜂巢能源科技有限公司 | Sealing ring for battery cover, battery cover with sealing ring and battery module |
| US20220123395A1 (en) * | 2018-11-30 | 2022-04-21 | Panasonic Intellectual Property Management Co., Ltd. | Battery |
| CN115051091A (en) * | 2022-06-09 | 2022-09-13 | 岳阳耀宁新能源科技有限公司 | Leakage-proof sealing structure for pole |
| CN217740662U (en) * | 2022-07-29 | 2022-11-04 | 宁德时代新能源科技股份有限公司 | End cap assemblies, battery cells, batteries and electrical devices |
| CN117374492A (en) * | 2023-12-07 | 2024-01-09 | 蜂巢能源科技股份有限公司 | Battery casing and battery |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102104966B1 (en) * | 2016-02-17 | 2020-04-27 | 주식회사 엘지화학 | Battery Cell Having Sealing Protrusion Between Electrode Terminals |
| CN220290935U (en) * | 2023-06-25 | 2024-01-02 | 湖北亿纬动力有限公司 | Battery cover components and batteries |
| CN220984669U (en) * | 2023-08-25 | 2024-05-17 | 珠海冠宇动力电池有限公司 | Battery top cover structure and battery |
| CN117374491B (en) * | 2023-12-07 | 2024-02-20 | 蜂巢能源科技股份有限公司 | Battery and electric equipment |
| CN118315744B (en) * | 2024-06-07 | 2024-08-20 | 蜂巢能源科技股份有限公司 | Battery cover plate and battery |
-
2024
- 2024-06-07 CN CN202410734720.4A patent/CN118315744B/en active Active
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2025
- 2025-06-06 WO PCT/CN2025/099640 patent/WO2025252213A1/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009087729A (en) * | 2007-09-28 | 2009-04-23 | Toshiba Corp | Sealed battery |
| US20220123395A1 (en) * | 2018-11-30 | 2022-04-21 | Panasonic Intellectual Property Management Co., Ltd. | Battery |
| CN216354485U (en) * | 2021-11-15 | 2022-04-19 | 蜂巢能源科技有限公司 | Sealing ring for battery cover, battery cover with sealing ring and battery module |
| WO2023082689A1 (en) * | 2021-11-15 | 2023-05-19 | 蜂巢能源科技股份有限公司 | Sealing ring for battery cover, battery cover having same, and battery module |
| CN115051091A (en) * | 2022-06-09 | 2022-09-13 | 岳阳耀宁新能源科技有限公司 | Leakage-proof sealing structure for pole |
| CN217740662U (en) * | 2022-07-29 | 2022-11-04 | 宁德时代新能源科技股份有限公司 | End cap assemblies, battery cells, batteries and electrical devices |
| CN117374492A (en) * | 2023-12-07 | 2024-01-09 | 蜂巢能源科技股份有限公司 | Battery casing and battery |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025252213A1 (en) * | 2024-06-07 | 2025-12-11 | 蜂巢能源科技股份有限公司 | Battery cover plate and battery |
| CN118523019A (en) * | 2024-07-19 | 2024-08-20 | 蜂巢能源科技股份有限公司 | Battery cover, battery and battery pack |
| WO2026016864A1 (en) * | 2024-07-19 | 2026-01-22 | 蜂巢能源科技股份有限公司 | Battery cover plate, battery, and battery pack |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2025252213A1 (en) | 2025-12-11 |
| CN118315744B (en) | 2024-08-20 |
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