CN115692969A - Utmost point post, top cap subassembly, secondary battery, battery module and consumer - Google Patents
Utmost point post, top cap subassembly, secondary battery, battery module and consumer Download PDFInfo
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- CN115692969A CN115692969A CN202211429257.XA CN202211429257A CN115692969A CN 115692969 A CN115692969 A CN 115692969A CN 202211429257 A CN202211429257 A CN 202211429257A CN 115692969 A CN115692969 A CN 115692969A
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- 238000007789 sealing Methods 0.000 claims abstract description 183
- 239000004033 plastic Substances 0.000 claims abstract description 77
- 229920003023 plastic Polymers 0.000 claims abstract description 77
- 230000004888 barrier function Effects 0.000 claims abstract description 10
- 239000003433 contraceptive agent Substances 0.000 claims abstract description 5
- 230000002254 contraceptive effect Effects 0.000 claims abstract description 5
- 230000000903 blocking effect Effects 0.000 claims description 42
- 238000000034 method Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 description 21
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 238000000465 moulding Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 230000004323 axial length Effects 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 239000011265 semifinished product Substances 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- -1 and when making Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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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Abstract
The application discloses utmost point post, top cap subassembly, secondary battery, battery module and consumer, this utmost point post is applied to top cap subassembly, top cap subassembly includes the plastic, utmost point post includes base and cylinder, wherein, the cylinder sets up on the base and the cylinder is the cylinder projection along the axial of cylinder on the base, the base surpasss the cylinder projection, the periphery wall of cylinder is fitted with a contraceptive ring and is equipped with the recess, the recess is used for and goes up the plastic joint, the cylinder between recess and the base is sealed cylinder section, sealed cylinder section is used for ring cover sealing washer, be provided with the barrier in the recess, the barrier is used for blockking that the sealing washer slides in the recess. The pole can effectively prevent the situation that the sealing ring slides into the groove of the pole in the assembling process of the top cover assembly, and the air tightness of the top cover assembly is improved.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a pole, a top cover assembly, a secondary battery, a battery module and electric equipment.
Background
A secondary battery is also called a rechargeable battery or a secondary battery, and refers to a battery that can be continuously used by activating an active material by charging after the battery is discharged. The lithium ion battery as a novel secondary battery has the advantages of large energy density, long cycle life, good safety, environmental protection and the like, and is widely applied to the fields of electric transportation, portable electronic products, energy storage systems and the like. The lithium ion battery mainly comprises a shell, an electric core and a top cover component, wherein the top cover component mainly comprises a positive pole column, a negative pole column, a sealing ring, upper plastic, lower plastic, a cover plate, an explosion-proof valve protection sheet and the like.
When the top cover component is assembled, the explosion-proof valve is firstly placed in the groove of the cover plate and is subjected to laser welding, the sealing ring sleeves the positive pole column and the negative pole column, the lower plastic and the cover plate welded with the explosion-proof valve are sleeved on the positive pole column and the negative pole column sleeved with the sealing ring, then the assembled top cover component semi-finished product is placed into an injection mold to be fixed, the plastic is injected, the upper plastic is clamped with the grooves on the positive pole column and the negative pole column, and finally the explosion-proof valve protection sheet is pasted in the groove of the welded explosion-proof valve of the cover plate, so that the assembly of the top cover component is completed.
The structure of a commonly used positive post is as shown in fig. 1, the structure of a negative post is approximately the same as that of the positive post, after the semi-finished product of the top cover assembly is subjected to injection molding, the upper plastic is clamped with the grooves 011 on the positive and negative posts, and the sealing rings 02 are located among the positive and negative posts, the upper plastic, the lower plastic and the cover plate, so that the positive post 01, the negative post and the lower plastic, and the cover plate and the upper plastic have good air tightness. However, in the process of transporting the assembled top cover assembly semi-finished product to an injection mold, or in the process of injection molding of the top cover assembly semi-finished product, the situation that the sealing rings 02 sleeved on the positive pole and the negative pole slide into the grooves 011 on the positive pole 01 and the negative pole respectively easily occurs, so that the airtightness of the top cover assembly is poor, and the secondary battery is prone to leakage.
Disclosure of Invention
The application discloses utmost point post, top cap subassembly, secondary battery, battery module and consumer can prevent effectively that the sealing washer from appearing in the recess condition appearance of slide-in utmost point post in the assembling process of top cap subassembly, has improved top cap subassembly's gas tightness.
In order to realize above-mentioned purpose, on the one hand, this application discloses a utmost point post is applied to the top cap subassembly, the top cap subassembly includes the plastic, utmost point post includes:
a base;
the cylinder, the cylinder set up in on the base just the cylinder is followed the axial of cylinder is in projection on the base is the cylinder projection, the base surpasss the cylinder projection, the periphery wall of cylinder is fitted with a contraceptive ring and is equipped with the recess, the recess be used for with go up the plastic joint, the recess with cylinder between the base is sealed cylinder section, sealed cylinder section is used for ring cover sealing washer, be provided with the barrier in the recess, the barrier is used for blockking the sealing washer slides in the recess.
In this embodiment, the column is disposed on the base and projects on the base along the axial direction of the column, the base exceeds the projection of the column, a step surface is formed between the base and the column, so that when the post is inserted into the cover plate, the base is limited on one side of the cover plate, and the column penetrates through the post hole of the cover plate and extends out from the other side of the cover plate. The periphery wall of cylinder is fitted with a contraceptive ring and is equipped with the recess, the recess be used for with last plastic joint, the cylinder between recess and the base is sealed cylinder section, sealed cylinder section is used for ring cover sealing washer to at utmost point post, sealing washer, go up plastic and apron etc. after the equipment is accomplished, but the sealing washer ring cover in sealed cylinder section and sealed between utmost point post and apron, so that the apron subassembly can have better gas tightness. Be provided with the part that blocks in the recess, the part that blocks is used for blockking that the sealing washer slides in the recess, with at utmost point post, the equipment semi-manufactured goods of sealing washer and apron are when being carried in the in-process or being fixed and carrying out the moulding plastics of going on the plastic in injection mold, can prevent that the sealing washer from the partly slide-in recess of sealed cylinder section slide-in recess or sealing washer, thereby can avoid causing the interference in the recess because of the sealing washer slides in the recess to last plastic joint, and the influence to the leakproofness between utmost point post and the apron, the gas tightness of the top cap subassembly that the equipment has this utmost point post has been improved.
In a possible implementation manner of the first aspect, the number of the blocking portions is multiple, and the multiple blocking portions are arranged in the groove at intervals along the circumferential direction of the cylinder.
Set up in the recess along the axial interval of cylinder through a plurality of stops, can make the in-process of assembling to the top cap subassembly that has this utmost point post, even when the sealing washer slides to the position department in recess location, the condition in the recess is all difficult for appearing slipping into in most or arbitrary part of sealing washer, in order when moulding plastics to last plastic through injection mold, the sealing washer that can extrude slips into sealed cylinder section again, make the sealing washer can fully fill between utmost point post and apron, utmost point post and lower plastic, thereby can make the top cap subassembly that the equipment has this utmost point post have better gas tightness.
In a possible implementation manner of the first aspect, a length of the blocking portion along the circumferential direction of the pole is L1, a length of the groove along the circumferential direction of the pole is L2, and L1/L2 is greater than or equal to 0.05 and less than or equal to 0.8.
From this, the ratio between the axial length of edge utmost point post of blocking part and the girth of recess can be located between 0.05 to 0.8 for blocking part can enough effectively block during the sealing washer slides in the recess, can prevent again that the joint length of plastic and recess is shorter because of blocking part leads to along the axial length overlength of utmost point post, has avoided appearing the insecure condition of being connected between plastic and the utmost point post because of the joint length between plastic and the recess is less
In a possible implementation manner of the first aspect, the blocking portion is a protrusion disposed in the groove, and one surface of the protrusion, which is far away from the bottom wall of the groove, is flush with the outer peripheral wall of the column.
Therefore, one surface of the blocking part, which is far away from the bottom wall of the groove, is flush with the outer peripheral wall of the cylinder, so that when the sealing ring is sleeved on the sealed cylinder section, the surface of the blocking part, which is far away from the bottom wall of the groove, does not protrude out of the outer peripheral wall of the main body and is not easy to be sleeved on the sealed cylinder section; simultaneously, when the equipment such as the utmost point post of cover with the sealing washer and last plastic, apron, also be difficult for appearing because of the periphery wall of stop part protrusion in the main part, protrusion in the sealing washer even leads to having the gap between utmost point post and last plastic and the apron, has improved the gas tightness of the top cap subassembly of equipment with this utmost point post.
In a possible implementation manner of the first aspect, the blocking portion is a clamping piece, and the clamping piece is detachably clamped in the groove.
Through with joint spare detachably joint in the recess, can process recess and barrier part respectively to the position that need not to consider barrier part is being processed the preparation to the recess, has reduced the processing degree of difficulty of recess.
In a second aspect, the present application discloses a header assembly comprising:
the cover plate is provided with a first surface and a second surface which are oppositely arranged, and the cover plate is provided with a pole hole which penetrates through the first surface and the second surface;
the pole of any one of the first aspects;
the sealing ring is sleeved on the sealing cylinder body section, the base is limited on the first surface, the cylinder body penetrates through the pole column hole, and the sealing ring is clamped between the base and the first surface;
and the upper plastic is arranged on the second surface and is clamped with the groove.
In this embodiment, the sealing washer cover is located on the sealed cylinder section of utmost point post, the base of utmost point post is spacing in first face, the post hole is worn to locate by the cylinder, the sealing washer presss from both sides and locates between the first face of base and apron, it sets up in the second face of apron and with the recess joint to go up the plastic, can make top cap assembly's sealing washer seal in the first face of apron, the base, sealed cylinder section and go up between the plastic, so that top cap assembly has better gas tightness, and still can make the sealing washer can be blockked by the stop part that sets up in the recess, in order to avoid the sealing washer to slide into the recess, the joint of having not only guaranteed to go up plastic and recess can be firmly stable, top cap assembly's gas tightness has still been improved, the condition that the secondary battery who has assembled this top cap assembly appears the battery liquid to reveal because of top cap assembly gas tightness is bad.
In ase:Sub>A possible implementation manner of the second aspect, along the axial direction of the cylinder, the groove width of the groove is ase:Sub>A, the thickness of the sealing ring is B, and B-ase:Sub>A is greater than 0mm and less than or equal to 0.7mm.
The range of the difference between the thickness B of the sealing ring and the groove width A of the groove is 0mm to 0.7mm, so that the sealing ring cannot slide into the groove easily, and the groove width of the groove in the axial direction of the column body is too small to cause the groove to be processed with great difficulty on the premise of ensuring the height of the pole column to be unchanged.
In a possible implementation manner of the second aspect, the height of the sealing cylinder section along the axial direction of the cylinder is C, and C-B is more than or equal to 0.5mm.
Therefore, when the sealing ring is sleeved in the sealing cylinder section and abutted to the base, the sealing ring can have a certain distance with the groove, namely when the sealing ring slides towards the direction of the groove, the sealing ring still needs to slide for a certain distance on the sealing cylinder section, so that the sealing ring can be further prevented from sliding into the groove, and the top cover assembly is further ensured to have better air tightness.
In a possible implementation manner of the second aspect, the inner diameter of the sealing ring is R1, the outer diameter of the sealing cylinder section is R2, and R2 is more than or equal to 0.1mm and less than or equal to R1-R2 is more than or equal to 1mm.
From this, can be so that be interference fit between sealing washer and the sealed cylinder section, increased the frictional resistance between sealing washer and the sealed cylinder section for the sealing washer is difficult for sliding for the sealed cylinder section, has further prevented that the sealing washer from sliding into the recess, better assurance top cap subassembly has better gas tightness.
In a third aspect, the present application also discloses a secondary battery including the cap assembly of any one of the second aspects.
In this embodiment, the top cap assembly is the top cap assembly in the second aspect, and therefore, the top cap assembly in the secondary battery also has good air tightness, the secondary battery can be effectively prevented from leaking battery fluid due to poor air tightness of the top cap assembly, and the quality and safety of the secondary battery are improved.
In a fourth aspect, the present application discloses a battery module including the secondary battery described in the third aspect.
In the present embodiment, the secondary battery in the battery module is the secondary battery in the third aspect, and therefore the secondary battery in the present embodiment has the technical effects of the secondary battery in the third aspect, and since the technical effects of the secondary battery in the third aspect have been fully described, the details are not repeated here. The cap assembly of the secondary battery in the third aspect is the cap assembly of any one of the above-described second aspects, and the terminal in the cap assembly of the second aspect is the terminal of any one of the above-described first aspects, so the terminal in the present embodiment has the technical effects of the terminal in the above-described first aspect.
In a fifth aspect, the present application discloses an electric device including the battery module described in the fourth aspect.
In this embodiment, the battery module in the electric device is the battery module in the fourth aspect, so that the battery module in this embodiment has the technical effect of the battery module in the fourth aspect, and since the technical effect of the battery module has been fully described in the fourth aspect, details are not described here. The secondary battery of the battery module in the fourth aspect is the secondary battery in the third aspect, the cap assembly of the secondary battery in the third aspect is the cap assembly of any one of the second aspects, and the post in the cap assembly of the second aspect is the post of any one of the first aspects, so the post in the present embodiment has the technical effects of the post in the first aspect.
Compared with the prior art, the beneficial effect of this application lies in:
in this application, the cylinder sets up on the base and the cylinder along the axial projection of cylinder on the base be the cylinder projection, and the base surpasss the cylinder projection, forms the step face between base and the cylinder to when utmost point post wears to locate on the apron, the base can be spacing in one side of apron, and the cylinder passes the utmost point post hole on the apron and stretches out from the opposite side of apron. The periphery wall of cylinder is fitted with a contraceptive ring and is equipped with the recess, the recess be used for with last plastic joint, the cylinder between recess and the base is sealed cylinder section, sealed cylinder section is used for ring cover sealing washer to at utmost point post, sealing washer, go up plastic and apron etc. after the equipment is accomplished, but the sealing washer ring cover in sealed cylinder section and sealed between utmost point post and apron, so that the apron subassembly can have better gas tightness. Be provided with the part that blocks in the recess, the part that blocks is used for blockking that the sealing washer slides in the recess, with at utmost point post, the equipment semi-manufactured goods of sealing washer and apron are when being carried in the in-process or being fixed and carrying out the moulding plastics of going on the plastic in injection mold, can prevent that the sealing washer from the partly slide-in recess of sealed cylinder section slide-in recess or sealing washer, thereby can avoid causing the interference in the recess because of the sealing washer slides in the recess to last plastic joint, and the influence to the leakproofness between utmost point post and the apron, the gas tightness of the top cap subassembly that the equipment has this utmost point post has been improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a sealing ring provided in the background art when sliding into a groove of a positive post;
FIG. 2 is an exploded view of a cap assembly according to an embodiment of the present application;
fig. 3 is a perspective view of a combination of an electrode post and a sealing ring according to an embodiment of the present disclosure;
fig. 4 is an exploded view of a combination of a pole and a sealing ring according to an embodiment of the present disclosure;
FIG. 5 is a cross-sectional view of an electrode post and seal ring assembly provided in accordance with an embodiment of the present disclosure;
fig. 6 is a cross-sectional view of another pole provided in an embodiment of the present application;
FIG. 7 is a perspective view of a cap assembly provided in accordance with an embodiment of the present application;
FIG. 8 is a cross-sectional view of a cap assembly provided in accordance with an embodiment of the present application;
fig. 9 is an enlarged view at a position a in fig. 8;
FIG. 10 is a cross-sectional view of another post and seal ring combination provided in accordance with an embodiment of the present application;
fig. 11 is a partial exploded view of a secondary battery provided in an embodiment of the present application;
fig. 12 is a perspective view of a battery module according to an embodiment of the present disclosure;
fig. 13 is a perspective view of an electric device according to an embodiment of the present application.
Description of reference numerals:
01-positive pole column; 011-grooves; 02-sealing ring; 1-pole column; 11-a base; 12-a cylinder; 121-sealing a cylinder section; 122-a groove; 123-a blocking part; 2-sealing ring; 3-cover plate; 31-a first side; 32-a second face; 33-polar pillar holes; 4-coating plastic; 5-discharging plastic cement; 6-an explosion-proof valve; 7-explosion-proof valve protection plate; 100-secondary battery; 110-a cap assembly; 1000-a battery module; 10000-electric equipment.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In this application, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
Moreover, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific type and configuration may or may not be the same), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.
The application discloses utmost point post, top cap subassembly, secondary battery, battery module and consumer, this utmost point post can effectively prevent to appear the sealing washer in the equipment in-process of top cap subassembly and slide in the recess condition of utmost point post and appear, has improved top cap subassembly's gas tightness.
The technical solution of the present application will be further described with reference to the following embodiments and accompanying drawings.
Example one
Fig. 2 is an exploded view of a cap assembly according to an embodiment of the present disclosure, fig. 3 is a perspective view of a combination of a post and a sealing ring according to an embodiment of the present disclosure, and fig. 4 is an exploded view of fig. 3, please refer to fig. 2-4.
The embodiment provides a pole, which is applied to the top cover assembly 110, the top cover assembly 110 includes an upper plastic 4, the pole 1 includes a base 11 and a cylinder 12, wherein the cylinder 12 is disposed on the base 11, and a projection of the cylinder 12 on the base 11 along an axial direction (shown by a dotted line in fig. 3) of the cylinder 12 is a projection of the cylinder 12, the base 11 exceeds the projection of the cylinder 12, a groove 122 is annularly disposed on an outer peripheral wall of the cylinder 12, the groove 122 is used for being clamped with the upper plastic 4, the cylinder 12 between the groove 122 and the base 11 is a sealing cylinder segment 121, the sealing cylinder segment 121 is used for sleeving a sealing ring 2, a blocking portion 123 is disposed in the groove 122, and the blocking portion 123 is used for blocking the sealing ring 2 from sliding into the groove 122.
In this embodiment, the column 12 is disposed on the base 11, and the projection of the column 12 on the base 11 along the axial direction of the column 12 is the projection of the column 12, the base 11 exceeds the projection of the column 12, a step surface is formed between the base 11 and the column 12, so that when the post 1 is inserted into the cover plate 3, the base 11 can be limited on one side of the cover plate 3, and the column 12 passes through the post hole on the cover plate 3 and extends out from the other side of the cover plate 3. The periphery wall of the cylinder 12 is annularly provided with a groove 122, the groove 122 is used for being clamped with the upper plastic 4, the cylinder 12 between the groove 122 and the base 11 is a sealing cylinder section 121, the sealing cylinder section 121 is used for being sleeved with a ring seal ring 2, so that after the pole 1, the seal ring 2, the upper plastic 4, the cover plate 3 and the like are assembled, the seal ring 2 can be sleeved on the sealing cylinder section 121 and sealed between the pole 1 and the cover plate 3, and the cover plate 3 assembly can have better air tightness. The blocking portion 123 is arranged in the groove 122, and the blocking portion 123 is used for blocking the sealing ring 2 from sliding into the groove 122, so that when the semi-finished assembled product of the electrode post 1, the sealing ring 2 and the cover plate 3 is carried or fixed in an injection mold to perform injection molding of the upper plastic 4, the sealing ring 2 can be prevented from sliding into the groove 122 from the sealing cylinder section 121 or the part of the sealing ring 2 slides into the groove 122, interference caused by the fact that the upper plastic 4 is clamped in the groove 122 due to the fact that the sealing ring 2 slides into the groove 122 can be avoided, influence on sealing performance between the electrode post 1 and the cover plate 3 is avoided, and air tightness of the top cover assembly 110 assembled with the electrode post 1 is improved.
The number of the blocking portions 123 may be one, or may be plural, and is not limited herein.
Fig. 5 is a cross-sectional view of an electrode post and a sealing ring assembly according to an embodiment of the present disclosure, please refer to fig. 5.
Alternatively, when the number of the blocking portions 123 is plural, the plural blocking portions 123 are disposed in the groove 122 at intervals in the circumferential direction of the cylinder 12.
From this, set up in recess 122 along the axial interval of post 12 through a plurality of barriers 123, can make and assemble the in-process to top cap subassembly 110 that has this utmost point post 1, even when sealing washer 2 slides to the position department at recess 122 place, the condition that most part or arbitrary part of sealing washer 2 all is difficult for appearing sliding in recess 122, with when moulding plastics upper plastic 4 through injection mold, can extrude sealing washer 2 and slide in sealed post body section 121 again, make sealing washer 2 can fully fill between utmost point post 1 and apron 3, utmost point post 1 and lower plastic 5 between, thereby can make top cap subassembly 110 of assembling this utmost point post 1 have better gas tightness.
When the number of the blocking portions 123 is plural, the number may be two, three, or four, which is not limited herein. Alternatively, when the number of the stoppers 123 is an even number, the stoppers 123 may be symmetrically disposed in the groove 122 in the circumferential direction of the cylinder 12, so that portions of the seal ring 2 are less likely to slide into the groove 122.
The plurality of stoppers 123 may be stoppers 123 having the same structure, or stoppers 123 having different structures, and are not limited herein.
In addition, when the plurality of blocking portions 123 are arranged in the groove 122 at intervals along the circumferential direction of the cylinder 12, the plurality of blocking portions 123 are arranged in the groove 122 at even intervals along the axial direction of the cylinder 12, and any part of the sealing ring 2 is not easy to slide into the groove 122, so that the top cover assembly 110 assembled with the pole 1 can have better air tightness.
Fig. 6 is a cross-sectional view of another electrode provided in the embodiment of the present application, please refer to fig. 6.
In some embodiments, the length of barrier 123 in the circumferential direction of pole 1 is L1, the length of groove 122 in the circumferential direction of pole 1 is L2, and L1/L2 is 0.05 ≦ L1 ≦ 0.8.
From this, the ratio between the axial length of edge utmost point post 1 of blocking portion 123 and the girth of recess 122 can be located between 0.05 to 0.8 for blocking portion 123 can enough effectively block during sealing washer 2 slips into recess 122, can prevent again that the joint length of going up plastic 4 and recess 122 is shorter because of blocking portion 123 leads to along the axial length overlength of utmost point post 1, has avoided appearing the insecure condition of being connected between plastic 4 and utmost point post 1 because of the joint length between last plastic 4 and the recess 122 is less.
When the length of the blocking portion 123 along the circumferential direction of the pole 1 and the length of the groove 122 along the circumferential direction of the pole 1 are smaller than 0.05, the length of the blocking portion 123 is smaller, so that when the sealing ring 2 slides to the position of the groove 122, the blocking portion 123 cannot effectively block the sealing ring 2 from sliding into the groove 122, and therefore the air tightness of the top cover assembly 110 assembled with the pole 1 is poor. When the length of the circumference of stopper 123 along utmost point post 1 and the length of recess 122 along the circumference of utmost point post 1 are greater than 0.8, the length of stopper 123 along the circumference of utmost point post 1 can be longer, make the effective girth of recess 122 can be shorter, plastic 4 on moulding plastics, and when making, plastic 4 and recess 122 joint, the length of going up the joint of plastic 4 and recess 122 can be shorter, easily lead to going up the condition that the joint between plastic 4 and the utmost point post 1 is connected insecure, the quality of top cap subassembly 110 after the equipment has been reduced.
The blocking portion 123 has various implementations, and in a possible implementation, as shown in fig. 4 and 5, the blocking portion 123 is a protrusion disposed in the groove 122, and a side of the protrusion away from the bottom wall of the groove 122 is flush with the outer peripheral wall of the column 12.
Therefore, one surface of the blocking part 123 far away from the bottom wall of the groove 122 is flush with the outer peripheral wall of the cylinder 12, so that when the sealing ring 2 is sleeved on the sealing cylinder section 121, the sealing ring 2 cannot be easily sleeved on the sealing cylinder section 121 because the surface of the blocking part 123 far away from the bottom wall of the groove 122 protrudes out of the outer peripheral wall of the cylinder 12, and the sealing ring 2 can be easily sleeved on the sealing cylinder section 121 of the pole 1; meanwhile, when the post 1 sleeved with the sealing ring 2 is assembled with the upper plastic 4, the cover plate 3 and the like, the blocking part 123 protrudes out of the peripheral wall of the column body 12, even protrudes out of the sealing ring 2, so that a gap is formed between the post 1 and the upper plastic 4 and the cover plate 3, and the air tightness of the top cover assembly 110 assembled with the post 1 is improved.
Moreover, the blocking portion 123 is a protrusion disposed in the groove 122, and the protrusion can be formed when the groove 122 is formed, for example, the groove 122 can be formed as several arc grooves around the central axis of the column 12, and adjacent arc grooves are connected by the protrusion, so that the groove 122 and the protrusion can be formed at the same time, and the process for forming the groove 122 and the protrusion is simplified.
In another implementation manner, the blocking portion 123 is a clamping member, and the clamping member is detachably clamped in the groove 122.
From this, through with joint spare detachably joint in recess 122, can make the quantity of stop part 123 can adjust according to the girth of recess 122 in a flexible way, so that the ratio of the total length of the circumference of edge cylinder 12 of stop part 123 and the circumference of edge cylinder 12 of recess 122 in the circumference of cylinder 12 be in predetermineeing the within range, can also process recess 122 and stop part 123 respectively simultaneously, in order need not to consider the position of stop part 123 in the processing preparation to recess 122, the processing degree of difficulty of recess 122 has been reduced.
The clamping piece can be in various structural forms, for example, the clamping piece can be a block-shaped clamping block, an arc-shaped clamping arc strip or a spherical clamping ball, and limitation is not required here.
In addition, joint spare detachably joint in recess 122, still can be when joint spare joint in recess 122, fixed through bonding between the diapire of joint spare and recess 122 to when a plurality of joint spare joints are in recess 122, can make interval setting between a plurality of joint spares, easy operation easily realizes.
Example two
Fig. 7 is a perspective view of a cap assembly according to the present embodiment, fig. 8 is a cross-sectional view of the cap assembly according to the present embodiment, and fig. 9 is an enlarged view of a position a in fig. 8. Please refer to fig. 2 and fig. 7-9.
The embodiment further provides a top cover assembly 110, which includes a cover plate 3, in one embodiment, any one of the pole posts 1, a sealing ring 2 and an upper plastic 4, wherein the cover plate 3 has a first surface 31 and a second surface 32 which are oppositely disposed, a pole post hole 33 which penetrates through the first surface 31 and the second surface 32 is disposed on the cover plate 3, the sealing ring 2 is sleeved on the sealing column section 121 of the pole post 1, the base 11 of the pole post 1 is limited on the first surface 31, the column 12 penetrates through the pole post hole 33, the sealing ring 2 is clamped between the base 11 and the first surface 31 of the cover plate 3, and the upper plastic 4 is disposed on the second surface 32 of the cover plate 3 and is clamped with the groove 122.
In this embodiment, the sealing ring 2 is sleeved on the sealing cylinder section 121 of the terminal 1, the base 11 of the terminal 1 is limited on the first surface 31, the cylinder 12 penetrates through the terminal hole 33, the sealing ring 2 is clamped between the base 11 and the first surface 31 of the cover plate 3, the upper plastic 4 is arranged on the second surface 32 of the cover plate 3 and clamped with the groove 122, so that the sealing ring 2 of the top cover assembly 110 can be sealed on the first surface 31 of the cover plate 3, the base 11, the sealing cylinder section 121 and the upper plastic 4, so that the top cover assembly 110 has better air tightness, and the sealing ring 2 can be blocked by the blocking part 123 arranged in the groove 122, so as to avoid the sealing ring 2 from sliding into the groove 122, thereby not only ensuring that the clamping between the upper plastic 4 and the groove 122 can be firmly and stably, but also improving the air tightness of the top cover assembly 110, and avoiding the liquid leakage of the secondary battery assembled with the top cover assembly 110 due to poor air tightness of the top cover assembly 110.
The sealing ring 2 is interposed between the base 11 and the first surface 31 of the cover plate 3, and the sealing ring 2 may be sleeved on the sealed cylindrical section 121, and the sealing ring 2 is located between the base 11 of the post 1 and the first surface 31 of the cover plate 3; a part of the sealing ring 2 may be located between the base 11 of the post 1 and the first surface 31 of the cover plate 3, and another part of the sealing ring 2 may be located between the sealed cylinder segment 121 and the post hole 33 of the cover plate 3, which is not limited herein. In addition, when the top cap assembly 110 further comprises a lower plastic 5, the sealing ring 2 is further located between the lower plastic 5 and the base 11 and the sealing cylinder segment 121.
In addition, the pole 1 in the top cap assembly 110 is the pole 1 in any one of the first embodiment, so that the pole 1 in this embodiment has the technical effects of the pole 1 in the first embodiment, and since the technical effects of the pole 1 have been fully described in the first embodiment, the description thereof is omitted here.
Fig. 10 is a cross-sectional view of an electrode post and sealing ring assembly provided in this embodiment, please refer to fig. 10.
In some embodiments, the groove width of the groove 122 is A and the thickness of the sealing ring 2 is B, and the thickness is more than 0mm and less than or equal to 0.7mm.
Therefore, the thickness B of the sealing ring 2 in the axial direction of the cylinder 12 is greater than the width a of the groove 122 in the axial direction of the cylinder 12, so that the sealing ring 2 is not easy to slide into the groove 122 even when sliding to the position of the groove 122, and thus, when the top cover assembly 110 is subjected to injection molding of the upper plastic 4, the upper plastic 4 can apply a pressing force to the sealing ring 2 in the direction towards the base 11 of the pole 1, so that the sealing ring 2 can be pressed and slid onto the sealing cylinder section 121, or a part of the sealing ring 2 is pressed and slid onto the sealing cylinder section 121, so that the sealing ring 2 can seal the pole 1 and the cover plate 3.
Moreover, the range of the difference between the thickness B of the sealing ring 2 and the groove width a of the groove 122 is 0mm to 0.7mm, so that the sealing ring 2 is not easy to slide into the groove 122, and on the premise that the height of the pole 1 is not changed, the groove width of the groove 122 in the axial direction of the column body 12 is too small, which causes great difficulty in processing the groove 122.
When the difference between the thickness B of the sealing ring 2 and the width a of the groove 122 is less than 0mm along the axial direction of the cylinder 12, the sealing ring 2 is likely to slide into the groove 122, which results in poor air tightness of the top cover assembly 110. And along the axial of post 12, when the difference between the thickness B of sealing washer 2 and the groove width a of recess 122 is greater than 0.7mm, can lead to sealing washer 2's thickness to be thicker, so, at this moment, under the unchangeable prerequisite of the height of utmost point post 1, can lead to the height that the sealed post section 121 of sealing washer 2 was established to the cover higher, corresponding recess 122's groove width can be less, and the less recess 122 of groove width has higher processing degree of difficulty. Therefore, when the range of the difference between the thickness B of the seal ring 2 and the groove width a of the groove 122 is between 0mm and 0.7mm, it is possible to make the seal ring 2 not easily slide into the groove 122, and it is not possible to increase the difficulty of processing the groove 122.
For example, when the thickness B of the seal ring 2 in the axial direction of the cylinder 12 is 1.2mm, the groove width a of the groove 122 in the axial direction of the cylinder 12 may be 0.5mm, 0.8mm, 1mm, or the like, which is not limited herein.
Alternatively, as shown in FIG. 10, the height of the sealed cylinder section 121 in the axial direction of the cylinder 12 may be C, C-B ≧ 0.5mm.
Therefore, when the sealing ring 2 is sleeved in the sealing cylinder section 121 and abuts against the base 11, the sealing ring 2 can have a certain distance with the groove 122, that is, the sealing ring 2 can slide a certain distance on the sealing cylinder section 121, so that when the sealing ring 2 slides towards the groove 122, the sealing ring 2 also needs to slide a certain distance on the sealing cylinder section 121, and the sealing ring 2 can be further prevented from sliding into the groove 122, so as to further ensure that the top cover assembly 110 has better air tightness.
When the difference between the height C of the sealing cylinder section 121 and the thickness B of the sealing ring 2 is smaller than 0.5mm along the axial direction of the cylinder 12, the difference between the height C of the sealing cylinder section 121 and the thickness B of the sealing ring 2 is smaller, and the sealing ring 2 can slide to the position of the groove 122 only by sliding a smaller distance on the sealing cylinder section 121. Therefore, when the difference between the height C of the sealed cylinder section 121 and the thickness B of the seal ring 2 is greater than or equal to 0.5mm in the axial direction of the cylinder 12, the seal ring 2 can be made less likely to slip into the groove 122.
For example, when the thickness B of the seal ring 2 in the axial direction of the cylinder 12 is 1.2mm, the axial height of the seal cylinder segment 121 in the axial direction of the cylinder 12 may be 1.7mm, 1.8mm, or the like.
Alternatively, as shown in FIG. 5, the inner diameter of the seal ring 2 is R1, the outer diameter of the seal cylinder segment 121 is R2, and R2-R1 are greater than or equal to 0.1mm and less than or equal to 1mm.
Therefore, the difference value between the outer diameter R2 of the sealing cylinder section 121 and the inner diameter R1 of the sealing ring 2 is between 0.1mm and 1mm, so that the sealing ring 2 and the sealing cylinder section 121 are in interference fit, the frictional resistance between the sealing ring 2 and the sealing cylinder section 121 is increased, the sealing ring 2 is not easy to slide relative to the sealing cylinder section 121, the sealing ring 2 is further prevented from sliding into the groove 122, and the top cover assembly 110 is better ensured to have better air tightness.
When the difference between the outer diameter R2 of the sealing cylinder section 121 and the inner diameter R1 of the sealing ring 2 is smaller than 0.1mm, when the sealing ring 2 is sleeved on the sealing cylinder section 121, the elastic deformation of the sealing ring 2 is smaller, and the frictional resistance between the sealing ring 2 and the sealing cylinder section 121 is also smaller, so that the sealing ring 2 can slide to the groove 122 only by smaller shaking or extrusion, and the sliding effect of the sealing ring 2 is prevented from being poor. And, when the difference between the external diameter R2 of the sealed cylinder section 121 and the internal diameter R1 of the sealing ring 2 is greater than 0.1mm, make the sealing ring 2 locate the sealed cylinder section 121 at the cover, the elastic deformation of the sealing ring 2 can be great, although can improve the frictional resistance between the sealing ring 2 and the sealed cylinder section 121, make the sealing ring 2 be difficult for sliding on the sealed cylinder section 121, but when the sealing ring 2 is established to the cover, the same great power that needs just can slide the sealing ring 2 to the sealed cylinder section 121, the degree of difficulty is established to the cover that has improved the sealing ring 2.
EXAMPLE III
Fig. 11 is a partial exploded view of a secondary battery according to the present embodiment. Please refer to fig. 11.
The present embodiment also provides a secondary battery including the cap assembly 110 of any one of the second embodiment.
In this embodiment, the top cap assembly 110 is the top cap assembly 110 in the second embodiment, and therefore, the top cap assembly 110 in the secondary battery 100 also has good air tightness, which can effectively prevent the secondary battery 100 from leaking battery fluid due to poor air tightness of the top cap assembly 110, and improve the quality and safety of the secondary battery 100.
In addition, the top cap assembly 110 in the secondary battery 100 is the top cap assembly 110 in any of the second embodiment, so the top cap assembly 110 in this embodiment has the technical effects of the top cap assembly 110 in the second embodiment, and since the technical effects of the top cap assembly 110 have been fully described in the second embodiment, the description thereof is omitted. In addition, the terminal post 1 in the cap assembly 110 of the second embodiment is the terminal post 1 of any one of the first embodiments, so that the terminal post 1 in this embodiment has the technical effects of the terminal post 1 in the first embodiment, and since the technical effects of the terminal post 1 have been fully described in the first embodiment, the description thereof is omitted.
Example four
Fig. 12 is a perspective view of a battery module according to the present embodiment. Please refer to fig. 12.
The present embodiment also provides a battery module including the secondary battery of the third embodiment.
In this embodiment, the secondary battery 100 in the battery module 1000 is the secondary battery 100 in the third embodiment, so that the secondary battery 100 in this embodiment has the technical effects of the secondary battery 100 in the third embodiment, and since the technical effects of the secondary battery 100 are fully described in the third embodiment, the details are not repeated herein. The cap assembly 110 of the secondary battery 100 in the third embodiment is the cap assembly 110 of any one of the second embodiments, and the terminal 1 of the cap assembly 110 of the second embodiment is the terminal 1 of any one of the first embodiments, so that the terminal 1 of the present embodiment has the technical effects of the terminal 1 of the first embodiment, and the technical effects of the terminal 1 are fully described in the first embodiment, and therefore, no further description is provided here.
EXAMPLE five
Fig. 13 is a perspective view of an electric device according to the present embodiment. Please refer to fig. 13.
The present embodiment also provides an electric device including the battery module 1000 of the fourth embodiment.
In this embodiment, the battery module 1000 in the electrical device 10000 is the battery module 1000 in the fourth embodiment, so that the battery module 1000 in this embodiment has the technical effects of the battery module 1000 in the fourth embodiment, and since the technical effects of the battery module 1000 in the fourth embodiment have been fully described, the details are not repeated herein. The secondary battery 100 of the battery module 1000 in the fourth embodiment is the secondary battery 100 in the third embodiment, the cap assembly 110 of the secondary battery 100 in the third embodiment is the cap assembly 110 of any one of the second embodiments, and the terminal 1 of the cap assembly 110 of the second embodiment is the terminal 1 of any one of the first embodiments, so that the terminal 1 of the present embodiment has the technical effects of the terminal 1 of the first embodiment, and the technical effects of the terminal 1 are fully described in the first embodiment, and thus, no further description is given here.
The electric equipment 10000 may be any one of an energy automobile, an energy storage system, a new energy engineering vehicle, and the like, and is not limited herein.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (12)
1. The utility model provides a utmost point post, its characterized in that is applied to the top cap subassembly, the top cap subassembly includes the plastic, utmost point post includes:
a base;
the cylinder, the cylinder set up in on the base, just the cylinder is followed the axial of cylinder is in projection on the base is the cylinder projection, the base surpasss the cylinder projection, the periphery wall of cylinder is fitted with a contraceptive ring and is equipped with the recess, the recess be used for with go up the plastic joint, the recess with cylinder between the base is sealed cylinder section, sealed cylinder section is used for ring cover sealing washer, be provided with the barrier in the recess, the barrier is used for blockking the sealing washer slides in the recess.
2. The pole post according to claim 1, wherein the number of the blocking portions is plural, and the plural blocking portions are arranged in the groove at intervals along the circumferential direction of the post body.
3. The pole post according to claim 1, wherein the length of the blocking portion along the circumferential direction of the pole post is L1, the length of the groove along the circumferential direction of the pole post is L2, and L1/L2 is greater than or equal to 0.05 and less than or equal to 0.8.
4. A post according to any one of claims 1 to 3, wherein the blocking portion is a protrusion disposed in the recess, and a surface of the protrusion remote from the bottom wall of the recess is flush with the outer circumferential wall of the post body.
5. The pole according to any one of claims 1 to 3, wherein the blocking portion is a snap-in member detachably snap-fitted into the groove.
6. A header assembly, comprising:
the cover plate is provided with a first surface and a second surface which are oppositely arranged, and the cover plate is provided with a pole hole which penetrates through the first surface and the second surface;
a pole according to any one of claims 1 to 5;
the sealing ring is sleeved on the sealing column body section, the base is limited on the first surface, the column body penetrates through the pole column hole, and the sealing ring is clamped between the base and the first surface;
go up the plastic, go up the plastic set up in the second face and with the recess joint.
7. The top cap assembly of claim 6, wherein the groove has ase:Sub>A width A and the seal ring has ase:Sub>A thickness B, and the thickness B-A is greater than 0mm and less than or equal to 0.7mm, in the axial direction of the cylinder.
8. The top cap assembly of claim 7, wherein the sealed cylinder section has a height C, C-B ≧ 0.5mm in the axial direction of the cylinder.
9. The top cap assembly of claim 6, wherein the seal ring has an inner diameter R1 and the seal cylinder section has an outer diameter R2,0.1mm ≦ R2-R1 ≦ 1mm.
10. A secondary battery comprising the cap assembly according to any one of claims 6 to 9.
11. A battery module comprising the secondary battery according to claim 10.
12. An electric device comprising the battery module according to claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211429257.XA CN115692969A (en) | 2022-11-15 | 2022-11-15 | Utmost point post, top cap subassembly, secondary battery, battery module and consumer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211429257.XA CN115692969A (en) | 2022-11-15 | 2022-11-15 | Utmost point post, top cap subassembly, secondary battery, battery module and consumer |
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| Publication Number | Publication Date |
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| CN115692969A true CN115692969A (en) | 2023-02-03 |
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| CN202211429257.XA Pending CN115692969A (en) | 2022-11-15 | 2022-11-15 | Utmost point post, top cap subassembly, secondary battery, battery module and consumer |
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| CN (1) | CN115692969A (en) |
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