CN116706362B - Battery cover plate and battery - Google Patents
Battery cover plate and battery Download PDFInfo
- Publication number
- CN116706362B CN116706362B CN202310988490.XA CN202310988490A CN116706362B CN 116706362 B CN116706362 B CN 116706362B CN 202310988490 A CN202310988490 A CN 202310988490A CN 116706362 B CN116706362 B CN 116706362B
- Authority
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- China
- Prior art keywords
- cover plate
- air guide
- hole
- plate body
- pole
- Prior art date
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 53
- 238000001514 detection method Methods 0.000 abstract description 13
- 239000001307 helium Substances 0.000 description 15
- 229910052734 helium Inorganic materials 0.000 description 15
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 15
- 239000007789 gas Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/394—Gas-pervious parts or elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a battery cover plate and a battery, and relates to the technical field of batteries. The battery cover plate comprises a cover plate body, a pole, upper plastic, a connecting piece and a sealing ring, wherein the cover plate body is provided with a first through hole; the pole is arranged on the cover plate body, a fixing hole and an air guide groove are formed in the pole, and the air guide groove is positioned on one side of the pole facing the cover plate body; the upper plastic comprises an insulating part and an insulating column arranged on the insulating part, the insulating column is provided with a second through hole which is communicated with the insulating part along the axial direction, the insulating part is arranged on the cover plate body and is positioned between the cover plate body and the polar column, the insulating column is arranged in the first through hole, the side wall of the second through hole is provided with a plurality of air guide channels which extend along the axial direction, and the air guide grooves are communicated with the plurality of air guide channels; the connecting piece penetrates through the fixing hole, the first through hole and the second through hole and is fixedly connected with the cover plate body, the upper plastic and the pole; the sealing ring is sleeved on the connecting piece and is positioned between the connecting piece and the cover plate body. The battery cover plate improves the accuracy and the reliability of tightness detection.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery cover plate and a battery.
Background
Energy conservation and emission reduction have become a new problem worldwide at present when environmental problems and energy crisis become more serious. As a representative of green traffic, the electric automobile has the advantages of energy conservation, environmental protection, cleanness and the like compared with the traditional fuel automobile, and reduces the environmental protection cost and the economic cost of the automobile.
The power battery is used as a core energy storage component of the electric automobile, and the sealing performance of the power battery directly influences the safety coefficient of the whole automobile. The sealing performance of the battery cover plate is a key component for determining the sealing performance of the power battery, and if the power battery cover plate fails, the leakage of an internal battery core and the reduction of energy storage performance can be caused, and even the risks of short circuit, fire and explosion of the battery core are caused.
In the production process, the tightness of the battery cover plate needs to be detected, and the tightness of the battery cover plate is mainly ensured by virtue of the compression sealing ring. However, because the contact and the lamination between the upper plastic and the pole or the upper plastic and the cover plate main body are very tight, a certain sealing effect can be formed, even if the sealing ring fails, the problem of tightness can not be detected rapidly and effectively in the detection link, and the safety performance of the battery cell is finally affected.
In view of the above, it is desirable to develop a battery cover plate and a battery to solve the problem that the sealing performance detection result is unreliable.
Disclosure of Invention
The invention aims to provide a battery cover plate and a battery, which improve the accuracy and reliability of tightness detection.
To achieve the purpose, the invention adopts the following technical scheme:
a battery cover plate comprising:
the cover plate body is provided with a first through hole;
the pole is arranged above the cover plate body, a fixing hole and an air guide groove are formed in the pole, the air guide groove is arranged on one side, facing the cover plate body, of the pole, one end of the air guide groove is communicated with the fixing hole, and the other end of the air guide groove is communicated with the outside of the pole;
the upper plastic rubber comprises an insulating part and an insulating column arranged on the insulating part, a second through hole which penetrates through is formed in the insulating column along the axial direction, the insulating part is arranged on the cover plate body and is positioned between the cover plate body and the polar column, the insulating column is arranged in the first through hole, a plurality of air guide channels which extend along the axial direction are formed in the side wall of the second through hole, and the air guide grooves are communicated with the plurality of air guide channels;
the connecting piece penetrates through the fixing hole, the first through hole and the second through hole and is fixedly connected with the cover plate body, the upper plastic and the pole;
the sealing ring is sleeved on the connecting piece and is positioned between the connecting piece and the cover plate body.
In some embodiments, a plurality of bosses are arranged on the inner wall of the second through hole at intervals along the circumferential direction, and one air guide channel is formed between two adjacent bosses.
In some embodiments, the inner wall of the fixing hole and the boss are both abutted against the connecting piece, the air guide groove is communicated to the inner wall of the fixing hole, and the end face of the boss, which faces one end of the pole, is lower than the upper surface of the upper plastic.
In some embodiments, the inner diameter of the second through hole is 1.2-2 times the diameter of the circumference where the inner surfaces of the plurality of bosses are located.
In some embodiments, an end of the boss facing the seal ring is spaced from the seal ring.
In some embodiments, a sinking groove is concavely arranged on the lower surface of the pole along the edge of the fixing hole, one end of the air guide groove is communicated with the sinking groove, and the sinking groove is communicated with the second through hole.
In some embodiments, the sum of the dimensions of the plurality of gas-guiding channels in the circumferential direction is less than or equal to half the circumferential perimeter of the plurality of gas-guiding channels.
In some embodiments, the connecting piece includes a first fixing portion, a connecting portion and a second fixing portion, the connecting portion penetrates through the pole, the upper plastic and the cover plate body, and the pole, the upper plastic and the cover plate body are clamped and fixed by the first fixing portion and the second fixing portion.
In some embodiments, the seal ring includes a sealing portion between the cap body and the connection portion, and a flange protruding from an outer periphery of the sealing portion between the cap body and the second fixing portion.
A battery, comprising:
a housing provided with an opening;
the battery cell is arranged in the shell;
the battery cover plate is the battery cover plate, and the battery cover plate covers the opening.
The invention has the beneficial effects that:
the invention provides a battery cover plate and a battery. In the battery cover plate, the sealing ring between the connecting piece and the cover plate body is of a sealing structure of the battery cover plate, when the sealing of the sealing ring fails, and when the tightness of the battery cover plate is detected, gas on one side of the battery cover plate can enter between the sealing ring and an upper plastic insulating column through the failure position of the sealing ring, and reaches the other side of the battery cover plate through the air guide channel and the air guide groove. The battery cover plate establishes a passage for the flow of gas, and when the sealing ring fails, the gas passage formed in the center of the battery cover plate can enable the gas to reach the other side from one side of the battery cover plate, and the gas is not blocked by unreliable sealing formed by extrusion of upper plastic, so that the accuracy and the reliability of tightness detection are greatly improved.
Drawings
Fig. 1 is a schematic view of a battery cover plate according to the present invention;
FIG. 2 is a cross-sectional view of a battery cover plate provided by the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a schematic view of a pole structure provided by the present invention;
FIG. 5 is a schematic diagram of the structure of the upper plastic provided by the present invention.
In the figure:
1. a cover plate body; 2. a pole; 3. applying plastic; 4. a connecting piece; 5. a seal ring; 6. lower plastic;
21. a fixing hole; 22. an air guide groove; 23. sinking grooves; 31. a second through hole; 32. an air guide channel; 33. a boss; 41. a first fixing portion; 42. a connection part; 43. a second fixing portion; 51. a sealing part; 52. a flange; 61. and an abutting portion.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, and may be, for example, either fixed or removable; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Unless expressly stated or limited otherwise, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
The embodiment provides a battery, and this battery includes casing, electric core and battery cover plate, and the casing is provided with the opening, and the electric core is installed in the casing, and the battery cover plate lid closes in the opening. Then electrolyte is injected into the shell through the electrolyte injection hole of the battery cover plate, and the electrolyte injection hole is sealed, so that the production of the battery is completed.
As shown in fig. 1 to 5, the battery cover plate comprises a cover plate body 1, a pole 2, an upper plastic 3, a connecting piece 4 and a sealing ring 5. The apron body 1 has seted up first through-hole, the post 2 sets up on apron body 1, fixed orifices 21 have been seted up to post 2, go up plastic 3 and include insulating part and set up the insulating post on insulating part, insulating post has seted up the second through-hole 31 that link up along the axial, insulating part sets up on apron body 1 and is located between apron body 1 and post 2, the insulating post sets up in first through-hole, connecting piece 4 runs through fixed orifices 21, first through-hole and second through-hole 31 and fixed connection apron body 1, go up plastic 3 and post 2, sealing washer 5 cover is located connecting piece 4 and is located between connecting piece 4 and the apron body 1.
In the battery, the cover plate body 1 is covered on the opening, the cover plate body 1 and the shell are the negative electrode of the battery, the connecting piece 4 and the pole post 2 are the positive electrode of the battery, and the upper plastic 3 is the main insulation structure of the battery cover plate. Wherein, the insulating part is used for insulating between the pole 2 and the cover plate body 1, and the insulating pole is used for insulating between the connecting piece 4 and the cover plate body 1.
In this embodiment, the battery cover is provided with two connectors 4 in total to improve the stability of the connection between the pole 2 and the cover body 1.
Preferably, the connecting piece 4 includes a first fixing portion 41, a connecting portion 42 and a second fixing portion 43, the connecting portion 42 penetrates through the pole 2, the upper plastic 3 and the cover body 1, and the pole 2, the upper plastic 3 and the cover body 1 are clamped and fixed by the first fixing portion 41 and the second fixing portion 43. The first fixing portion 41 and the second fixing portion 43 of the connecting member 4 can fix the battery cover plate into a unitary structure, preventing loose movement of the components of the battery cover plate. Wherein, in order to ensure the flatness of the surface of the pole 2, the fixing hole 21 of the pole 2 is a counter bore, and the first fixing portion 41 is disposed in the counter bore.
Specifically, the connecting member 4 is a rivet, the initial rivet includes a connecting portion 42 and a second fixing portion 43, when assembling, the sealing ring 5 is sleeved on the connecting portion 42, and the connecting portion 42 sequentially passes through the lower plastic 6, the cover plate body 1, the upper plastic 3 and the pole 2, and then the end of the connecting portion 42 is pressed or knocked on one side of the pole 2, so that the end of the connecting portion 42 is deformed to form the first fixing portion 41, thereby forming a whole battery cover plate.
Preferably, as shown in fig. 3, the seal ring 5 includes a sealing portion 51 and a flange 52 protruding from an outer periphery of the sealing portion 51, the sealing portion 51 being located between the cap body 1 and the connection portion 42, the flange 52 being located between the cap body 1 and the second fixing portion 43. The cross section of the sealing ring 5 is L-shaped, so that the sealing ring 5 can be extruded from two mutually perpendicular directions to play a sealing role, and the sealing effect is greatly improved.
In this embodiment, the battery cover further includes a lower plastic 6, the lower plastic 6 is located below the cover body 1 and between the cover body 1 and the second fixing portion 43, and the lower plastic 6 can also serve to insulate the cover body 1 from the second fixing portion 43 of the pole 2.
Further, an abutment portion 61 is provided on the outer periphery of the lower plastic 6 in a direction away from the cover plate body 1, and the abutment portion 61 is configured to abut against the inner wall of the housing. The cover body 1 is buckled to the opening of the shell, and the abutting part 61 of the lower plastic 6 abuts against the inner wall of the shell to provide a force for fixing the cover body 1 and the shell, and meanwhile, a certain tightness can be provided.
It can be understood that the power battery is used as a core energy storage component of the electric automobile, and the sealing performance of the power battery directly influences the safety coefficient of the whole automobile. The sealing performance of the battery cover plate is a key component for determining the sealing performance of the power battery, and if the power battery cover plate fails, the leakage of an internal battery core and the reduction of energy storage performance can be caused, and even the risks of short circuit, fire and explosion of the battery core are caused.
In order to improve the safety performance of the battery, the tightness of the battery cover plate needs to be detected in the production process. At present, the leak rate of helium detection is used for judging the sealing reliability of a battery cover plate, namely, a detection cavity is divided into two spaces by the battery cover plate, helium is introduced into one space, and the concentration of the helium is detected in the other space. If the helium concentration in the other space is too high, this indicates that there is a problem with the sealability of the battery cover plate.
It will be appreciated that the sealing properties of the battery cover plate are mainly ensured by means of the compression seal 5. However, because the contact and the lamination between the upper plastic 3 and the pole 2 or between the upper plastic 3 and the cover plate main body are very tight, a certain sealing effect can be formed, even if the sealing ring 5 fails, helium can be isolated by the sealing formed by the upper plastic 3, so that the problem of tightness can not be effectively and rapidly detected, the sealing effect formed by the extrusion deformation of the upper plastic 3 is unreliable, and the sealing effect is easy to fail in use, and finally the safety performance of the battery core is influenced.
As shown in fig. 3-5, in order to solve the above-mentioned problem, in the battery cover plate provided in this embodiment, the post 2 is further provided with an air guide groove 22, the air guide groove 22 is located at one side of the post 2 facing the cover plate body 1, one end of the air guide groove 22 is communicated to the fixing hole 21, the other end of the air guide groove 22 is communicated to the outside of the post 2, the side wall of the second through hole 31 is provided with a plurality of air guide channels 32 extending along the axial direction, and the air guide groove 22 is communicated with the plurality of air guide channels 32.
If the sealing of the sealing ring 5 fails, helium gas on one side of the battery cover plate can enter between the sealing ring 5 and the insulating column of the upper plastic 3 through the failure position of the sealing ring 5 and reach the other side of the battery cover plate through the air guide channel 32 and the air guide groove 22 during helium detection. The battery cover plate establishes a passage for helium to flow, and when the sealing ring 5 fails, helium can pass through the battery cover plate from one side of the battery cover plate to the other side without being blocked by unreliable sealing formed by extrusion of the upper plastic 3, so that the accuracy and the reliability of tightness detection are greatly improved.
As shown in fig. 3 and 5, a plurality of bosses 33 are circumferentially spaced from the inner wall of the second through hole 31, and an air guide channel 32 is formed between two adjacent bosses 33. The inner wall of the second through hole 31 is partitioned into a plurality of air guide channels 32 by a plurality of bosses 33, so that helium can pass through conveniently, and the accuracy of tightness detection is improved.
In this embodiment, the inner wall of the fixing hole 21 and the boss 33 are both abutted against the connecting piece 4, the air guide groove 22 is communicated to the inner wall of the fixing hole 21, and the end face of the boss 33 facing one end of the pole 2 is lower than the upper surface of the upper plastic 3. The structure makes the part of the second through hole 31 above the boss 33 form a communicated annular space in the circumferential direction of the connecting piece 4, all the air guide channels 32 are communicated with the annular space, and the annular space is communicated with the air guide groove 22. Regardless of the failure position of the seal ring 5, helium passing through the failure position must enter a certain air guide channel 32 and enter the annular space, so that the helium is discharged through the air guide groove 22, and the defect that the reliability of seal detection is affected due to the fact that the helium enters the air guide channel 32 which is not communicated with the air guide groove 22 when the seal ring 5 fails is avoided.
Wherein, the height difference between the upper surface of the boss 33 and the upper surface of the upper plastic 3 is 0-0.3 mm.
As shown in fig. 3, one end of the boss 33 facing the sealing ring 5 is spaced from the sealing ring 5, so as to form a communication space between the boss 33 and the sealing ring 5, and also avoid that helium passing through the failure position is blocked by the boss 33 and cannot enter the air guide channel 32 to affect the accuracy of the detection result.
In this embodiment, the inner diameter of the second through hole 31 is 1.2-2 times the diameter of the circumference where the inner surfaces of the plurality of bosses 33 are located. The structure defines the dimension of the air guide passage 32 in the radial direction of the second through hole 31, and when the inner diameter of the second through hole 31 is 1.2 times the diameter of the circumference where the inner surfaces of the plurality of bosses 33 are located, the thickness of the boss 33 is 1/6 of the radius of the second through hole 31, and when the inner diameter of the second through hole 31 is 2 times the diameter of the circumference where the inner surfaces of the plurality of bosses 33 are located, the thickness of the boss 33 is 1/2 of the radius of the second through hole 31.
Preferably, the sum of the dimensions of the plurality of air guide channels 32 in the circumferential direction is less than or equal to half the circumferential perimeter of the plurality of air guide channels 32. The proportion of the air guide channel 32 on the circumference of the boss 33 should not be too high, which would affect the stability of the relative position between the upper plastic 3 and the connecting piece 4.
As shown in fig. 3 and 4, the lower surface of the pole 2 is concavely provided with a sink groove 23 along the edge of the fixing hole 21, one end of the air guide groove 22 is communicated to the sink groove 23, and the sink groove 23 is communicated with the second through hole 31. The sinking groove 23 can further improve connectivity between the air guide groove 22 and the second through hole 31, so that the influence on the accuracy of the detection result caused by that helium in the annular space cannot smoothly enter the air guide groove 22 is avoided.
The foregoing is merely exemplary of the present invention, and those skilled in the art should not be considered as limiting the invention, since modifications may be made in the specific embodiments and application scope of the invention in light of the teachings of the present invention.
Claims (8)
1. A battery cover plate, comprising:
the cover plate comprises a cover plate body (1), wherein the cover plate body (1) is provided with a first through hole;
the pole (2) is arranged on the cover plate body (1), a fixing hole (21) and an air guide groove (22) are formed in the pole (2), the air guide groove (22) is arranged on one side, facing the cover plate body (1), of the pole (2), one end of the air guide groove (22) is communicated with the fixing hole (21), and the other end of the air guide groove (22) is communicated with the outside of the pole (2);
the upper plastic (3) comprises an insulating part and insulating columns arranged on the insulating part, wherein a through second through hole (31) is formed in the insulating columns along the axial direction, the insulating parts are arranged on the cover plate body (1) and are positioned between the cover plate body (1) and the polar columns (2), the insulating columns are arranged in the first through holes, a plurality of bosses (33) are arranged on the inner walls of the second through holes (31) at intervals along the circumferential direction, an air guide channel (32) is formed between every two adjacent bosses (33), and the air guide grooves (22) are communicated with the air guide channels (32);
the connecting piece (4), the connecting piece (4) runs through the fixed hole (21), the first through hole and the second through hole (31) and is fixedly connected with the cover plate body (1), the upper plastic (3) and the pole (2), the inner wall of the fixed hole (21) and the boss (33) are all abutted against the connecting piece (4), the air guide groove (22) is communicated to the inner wall of the fixed hole (21), and the end face of the boss (33) facing one end of the pole (2) is lower than the upper surface of the upper plastic (3);
the sealing ring (5) is sleeved on the connecting piece (4) and is positioned between the connecting piece (4) and the cover plate body (1).
2. The battery cover plate according to claim 1, wherein the inner diameter of the second through hole (31) is 1.2-2 times the diameter of the circumference where the inner surfaces of the plurality of bosses (33) are located.
3. Battery cover plate according to claim 1, characterized in that the end of the boss (33) facing the sealing ring (5) is arranged at a distance from the sealing ring (5).
4. The battery cover plate according to claim 1, wherein a sinking groove (23) is concavely arranged on the lower surface of the pole (2) along the edge of the fixing hole (21), one end of the air guide groove (22) is communicated with the sinking groove (23), and the sinking groove (23) is communicated with the second through hole (31).
5. The battery cover plate according to claim 1, wherein a sum of dimensions of the plurality of air guide channels (32) in the circumferential direction is less than or equal to half of a circumferential circumference where the plurality of air guide channels (32) are located.
6. The battery cover plate according to any one of claims 1-5, wherein the connecting piece (4) comprises a first fixing portion (41), a connecting portion (42) and a second fixing portion (43), the connecting portion (42) penetrates through the pole (2), the upper plastic (3) and the cover plate body (1), and the pole (2), the upper plastic (3) and the cover plate body (1) are clamped and fixed by the first fixing portion (41) and the second fixing portion (43).
7. The battery cover plate according to claim 6, wherein the seal ring (5) includes a seal portion (51) and a flange (52) protruding from an outer periphery of the seal portion (51), the seal portion (51) is located between the cover plate body (1) and the connecting portion (42), and the flange (52) is located between the cover plate body (1) and the second fixing portion (43).
8. A battery, comprising:
a housing provided with an opening;
the battery cell is arranged in the shell;
a battery cover plate, which is a battery cover plate according to any one of claims 1 to 7, and which covers the opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310988490.XA CN116706362B (en) | 2023-08-08 | 2023-08-08 | Battery cover plate and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310988490.XA CN116706362B (en) | 2023-08-08 | 2023-08-08 | Battery cover plate and battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116706362A CN116706362A (en) | 2023-09-05 |
| CN116706362B true CN116706362B (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310988490.XA Active CN116706362B (en) | 2023-08-08 | 2023-08-08 | Battery cover plate and battery |
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| Country | Link |
|---|---|
| CN (1) | CN116706362B (en) |
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| CN219163534U (en) * | 2022-12-12 | 2023-06-09 | 蜂巢能源科技股份有限公司 | Aluminum sheet, cover plate and lithium battery for lithium battery |
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2023
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|---|---|---|---|---|
| CN215266471U (en) * | 2021-06-04 | 2021-12-21 | 欣旺达电动汽车电池有限公司 | Power battery top cap and power battery |
| CN217114586U (en) * | 2021-12-31 | 2022-08-02 | 安徽力翔电池科技有限公司 | Detectable prevents circular power battery top cap structure of safety of leakproofness inefficacy |
| CN217361746U (en) * | 2022-01-28 | 2022-09-02 | 上海兰钧新能源科技有限公司 | Secondary battery post structure |
| CN218919084U (en) * | 2022-11-18 | 2023-04-25 | 苏州金利美金属科技有限公司 | Device for improving sealing performance of top cover of new energy battery and new energy battery |
| CN219163534U (en) * | 2022-12-12 | 2023-06-09 | 蜂巢能源科技股份有限公司 | Aluminum sheet, cover plate and lithium battery for lithium battery |
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| CN116706362A (en) | 2023-09-05 |
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