CN219575781U - Battery negative electrode cover plate assembly and cylindrical battery - Google Patents
Battery negative electrode cover plate assembly and cylindrical battery Download PDFInfo
- Publication number
- CN219575781U CN219575781U CN202320458053.2U CN202320458053U CN219575781U CN 219575781 U CN219575781 U CN 219575781U CN 202320458053 U CN202320458053 U CN 202320458053U CN 219575781 U CN219575781 U CN 219575781U
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- Prior art keywords
- negative electrode
- battery
- top cover
- pole
- shell
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- 238000007789 sealing Methods 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000011810 insulating material Substances 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims description 12
- 238000002955 isolation Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 abstract description 27
- 239000003792 electrolyte Substances 0.000 abstract description 17
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 10
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 10
- 238000007599 discharging Methods 0.000 abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 9
- 229910000838 Al alloy Inorganic materials 0.000 description 6
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model provides a battery negative electrode cover plate assembly and a cylindrical battery, comprising a riveting piece, a negative electrode top cover, a pole column and a negative electrode current collecting disc; the battery pack is characterized by further comprising a separator made of insulating materials, wherein the pole column, the negative electrode top cover, the separator and the negative electrode current collecting disc are sequentially connected through the riveting piece, and the separator is used for being in sealing connection with the opening of the negative electrode end of the battery shell. According to the utility model, the battery cathode cover plate assembly is formed by arranging the insulating spacer, sequentially connecting the pole column, the cathode top cover, the spacer and the cathode current collecting disc through the riveting piece, so that the spacer is directly and hermetically connected with the opening end of the cathode of the battery shell, the spacer separates the electrolyte from the cathode top cover, and lithium ions cannot be embedded into the cathode top cover through the electrolyte in the charging and discharging process of the battery, so that the cathode top cover can be prevented from being corroded.
Description
Technical Field
The utility model relates to the technical field of cylindrical batteries, in particular to a battery negative electrode cover plate assembly and a cylindrical battery.
Background
The voltage of the aluminum shell and the negative electrode terminal of the current cylindrical lithium ion battery is generally more than or equal to 1.2v, so that the battery can not generate a negative short phenomenon, namely the negative electrode terminal of the battery is short-circuited with the shell. Because the negative electrode potential of the battery is lower, lithium ions diffuse to the negative electrode end through electrolyte in the charging and discharging process, in the process, when the voltage between the aluminum shell and the negative electrode is lower than 1.2v, lithium ions can be inserted into an aluminum metal gap through the electrolyte to form lithium aluminum alloy, and the aluminum shell or the negative electrode top cover is corroded due to the formation of the lithium aluminum alloy, so that the safety performance of the battery is influenced, meanwhile, lithium ions are consumed, the battery capacity is reduced, the battery cycle performance is reduced, and meanwhile, the mechanical strength and toughness of the aluminum shell and the cover plate of the battery are reduced due to the fact that the lithium aluminum alloy is in powder form, so that the safety performance of the battery is reduced.
In order to improve the defect in the prior art, a weak positive electrode conducting structure is usually introduced into a cylindrical battery, for example, a weak positive electrode conducting structure of a power lithium battery with a publication number of CN211045575U is introduced between a positive electrode top cover and a shell to realize the conduction of the shell and the positive electrode top cover, and the structure is arranged, although the corrosion probability of the shell can be reduced to a certain extent. But for the cylindrical battery of both ends play electrode, be connected with the aluminium shell through negative pole apron subassembly, the casing is uncharged, but the inside electrolyte of aluminium shell still can contact with the negative pole top cap of aluminium material, leads to lithium ion to form lithium aluminum alloy through the embedding of electrolyte to the negative pole top cap to cause the negative pole top cap to be corroded.
Disclosure of Invention
In view of this, the utility model provides a battery negative electrode cover plate assembly and a cylindrical battery, which solve the problem that lithium ions can be inserted into a negative electrode top cover through electrolyte to form lithium aluminum alloy, so that the negative electrode top cover is corroded.
The technical scheme of the utility model is realized as follows:
in one aspect, the utility model provides a battery negative electrode cover plate assembly, which comprises a riveting piece, a negative electrode top cover, a pole column and a negative electrode current collecting disc;
the battery pack is characterized by further comprising a separator made of insulating materials, wherein the pole column, the negative electrode top cover, the separator and the negative electrode current collecting disc are sequentially connected through the riveting piece, and the separator is used for being in sealing connection with the opening of the negative electrode end of the battery shell.
On the basis of the technical scheme, preferably, the separator comprises a tray body and an annular pressing part fixedly arranged on the outer periphery of the tray body, the negative electrode top cover is horizontally arranged on the surface of the tray body, and at least one part of the top surface of the negative electrode top cover is covered by the annular pressing part.
Further, preferably, the device further comprises an insulating part, the insulating part is arranged between the pole and the negative pole top cover, a mounting hole for the rivet to pass through is formed in the negative pole top cover, the insulating part comprises a mounting sleeve and a barrel sleeve, the mounting sleeve is horizontally arranged on one surface of the negative pole top cover, which is far away from the isolating part, one end of the barrel sleeve is inserted into the mounting hole, the other end of the barrel sleeve faces the mounting sleeve, one surface of the negative pole top cover is coaxially and fixedly connected, the pole is arranged on the mounting sleeve, and the rivet passes through the negative pole current collecting disc, the isolating part and the barrel sleeve and is connected with the pole.
Still further, preferably, the negative electrode top cover further comprises a sealing member, an annular groove is formed in one face, facing the separator, of the negative electrode top cover, the annular groove is located on the outer circumferential side of the mounting hole, the sealing member is arranged between the riveting member and the annular groove, and the sealing member abuts against the outer circumferential wall of the riveting member, the inner wall of the annular groove and the surface of the separator.
On the basis of the above technical scheme, preferably, two riveting pieces are symmetrically arranged relative to the center of the pole, and the two riveting pieces are respectively connected with two ends of the pole in the length direction.
On the other hand, the utility model discloses a cylindrical battery, which comprises a shell, a winding core, a positive electrode cover plate component and a battery negative electrode cover plate component, wherein the winding core is arranged in the shell, the positive electrode cover plate component is fixedly arranged at the positive electrode opening end of the shell and is connected with the positive electrode of the winding core, the negative electrode cover plate component is fixedly connected with the negative electrode opening end of the shell through a separator, and the negative electrode cover plate component is connected with the negative electrode of the winding core through a negative electrode current collecting disc.
On the basis of the technical scheme, preferably, the inner peripheral wall of the negative end of the shell is provided with a mounting groove, the isolating piece is horizontally arranged in the mounting groove, and the isolating piece is in interference fit with the mounting groove.
Further, preferably, the depth of the mounting groove is greater than the thickness of the spacer, and when the end of the housing corresponding to the mounting groove is squat-sealed toward the center of the housing, the top surface of the spacer is horizontally wrapped by the peripheral wall of the housing.
Preferably, the outer peripheral wall of the shell corresponding to the mounting groove is provided with a thickened wall.
Compared with the prior art, the utility model has the following beneficial effects:
(1) According to the utility model, the battery cathode cover plate assembly is formed by arranging the insulating spacer, sequentially connecting the pole column, the cathode top cover, the spacer and the cathode current collecting disc through the riveting piece, so that the spacer is directly and hermetically connected with the opening end of the cathode of the battery shell, the spacer separates the electrolyte from the cathode top cover, and lithium ions cannot be embedded into the cathode top cover through the electrolyte in the charging and discharging process of the battery, so that the cathode top cover can be prevented from being corroded;
(2) By arranging the sealing element on the periphery side of the mounting hole, the sealing element is arranged between the riveting element and the annular groove, and the sealing element is propped against the periphery wall of the riveting element, the inner wall of the annular groove and the surface of the isolating element, electrolyte can be prevented from leaking onto the negative electrode top cover through the mounting hole, and the negative electrode top cover is prevented from being corroded;
(3) The mounting groove is formed in the inner wall of the negative electrode end of the shell, the depth of the mounting groove is larger than the thickness of the isolation piece, so that the shell and the top surface of the isolation piece are conveniently covered by a squatting seal process, meanwhile, the isolation piece is in interference fit with the mounting groove, firm fit of the isolation piece in the mounting groove can be realized, and meanwhile, the reliability of sealing connection is ensured;
(4) Through making the spacer set up to disk body and fixed the annular portion that compresses tightly of setting at disk body periphery circle, utilize annular portion that compresses tightly can cover negative pole top cap periphery circle top surface, on the one hand, can make between spacer and the negative pole top cap mutually fixed, on the other hand, the spacer level is placed the mounting groove after, and the casing is squatting and is wrapped limit in-process, can make the casing wrap up annular portion's top surface, avoids casing edge and negative pole top cap contact, realizes that casing and negative pole top cap are insulating.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of a negative electrode cover plate assembly according to the present disclosure;
FIG. 2 is a cut-away view of a negative cap assembly of the present disclosure;
fig. 3 is an exploded view of a cylindrical battery according to the present disclosure;
fig. 4 is a schematic plan view of a cylindrical battery according to the present disclosure;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
reference numerals:
100. a negative electrode cover plate assembly; 1. a rivet; 2. a pole; 3. a negative electrode current collecting plate; 4. a spacer; 5. a negative cap; 6. an insulating member; 51. a mounting hole; 61. a mounting sleeve; 62. a sleeve; 7. a seal; 52. an annular groove; 200. a positive electrode cover plate assembly; 8. a housing; 9. a winding core; 81. a mounting groove; 41. a tray body; 42. an annular pressing part; 82. and (5) thickening the wall.
Detailed Description
The following description of the embodiments of the present utility model will clearly and fully describe the technical aspects of the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.
Referring to fig. 1, in conjunction with fig. 2, an embodiment of the utility model discloses a battery negative electrode cap assembly 100, which comprises a rivet 1, a negative electrode top cap 5, a post 2 and a negative electrode current collecting plate 3.
As a prior art, the rivet is used to sequentially pass through the anode current collecting plate, the anode top cover and the pole to realize the rivet. In order to avoid the contact between the winding core and the negative electrode top cover, a lower plastic part is generally arranged between the negative electrode top cover and the negative electrode current collecting disc, however, the lower plastic part cannot block the electrolyte from contacting with the negative electrode top cover, and in the use process of the cylindrical battery, lithium ions are inserted into the negative electrode top cover through the electrolyte to form lithium aluminum alloy, so that the negative electrode top cover is corroded.
Therefore, in order to solve the above technical problems, the present utility model improves the structure of the existing negative electrode cover plate assembly 100, and specifically, on the basis of the above parts, a spacer 4 made of insulating material is further provided, and the spacer 4 is a plastic member made of hard material. The pole 2, the negative pole top cover 5, the separator 4 and the negative pole current collecting disc 3 are sequentially connected through the riveting piece 1, so that a negative pole cover plate assembly 100 is formed, when the negative pole cover plate assembly 100 is connected with the shell 8, the separator 4 is directly connected with the opening of the negative pole end of the battery shell 8 in a sealing way, in this way, the separator 4 separates electrolyte from the negative pole top cover 5, lithium ions cannot be embedded into the negative pole top cover 5 through the electrolyte in the charging and discharging process of the battery, and therefore the negative pole top cover 5 can be prevented from being corroded.
In the above embodiment, the separator 4 is disc-shaped for convenience in matching with the open end of the case 8, and since the negative electrode top cover 5 is also disc-shaped, the outer diameter of the negative electrode top cover 5 is set smaller than the outer diameter of the separator 4 in order to avoid connection of the case 8 with the negative electrode top cover 5 when the separator 4 is connected with the open end of the case 8. This arrangement prevents the housing 8 from being connected in an electrically conductive manner to the negative cap 5 when the housing 8 is connected in a sealed manner to the spacer 4, so that an insulating connection is provided between the housing 8 and the spacer 4.
In this embodiment, negative pole top cap 5 level sets up in the 4 top surfaces of separator, when negative pole apron subassembly and casing open end are connected, is through separator and casing open end sealing connection, does not carry out effective fastening connection between 5 periphery circles of negative pole top cap and the separator 4 this moment, leads to whole negative pole apron subassembly structural strength to weaken. To this end, this embodiment carries out the structure setting to the spacer 4, specifically, through making spacer 4 set up to disk 41 and fixed the annular hold-down part 42 that sets up at disk 41 periphery circle, negative pole top cap 5 level sets up in the center of disk 41, utilize annular hold-down part 42 can cover negative pole top cap 5 periphery circle top surface, so, the periphery circle top surface of negative pole top cap 5 is lived to annular hold-down part parcel for spacer and negative pole top cap constitution become a whole, because negative pole top cap is aluminum plate, when carrying out sealing connection with the casing with insulating material's spacer parcel together, structural strength can be better.
It should be noted that the separator 4 and the anode cover assembly 100 may be assembled and fixed by an injection molding process during the production process.
Because the pole 2 is arranged on the surface of the negative electrode top cover 5, the negative electrode top cover 5 is also made of aluminum, and if the negative electrode top cover 5 is negatively charged, the negative electrode end can cause too small current because of too large internal resistance of the negative electrode top cover 5. For this reason, in this embodiment, the insulating member 6 is disposed between the pole 2 and the negative electrode top cover 5, and meanwhile, in order to avoid the conduction between the rivet 1 and the negative electrode top cover 5, in this embodiment, the mounting hole 51 through which the rivet 1 passes is formed in the negative electrode top cover 5, the insulating member 6 includes a mounting sleeve 61 and a sleeve 62, the mounting sleeve 61 is horizontally disposed on one side of the negative electrode top cover 5 away from the separator 4, one end of the sleeve 62 is inserted into the mounting hole 51, the other end is fixedly connected with the mounting sleeve 61 coaxially toward one side of the negative electrode top cover 5, the pole 2 is disposed on the mounting sleeve 61, and the rivet 1 passes through the negative electrode current collecting disc 3, the separator 4, the sleeve 62 and is connected with the pole 2. The arrangement is thereby that the rivet 1 establishes an insulating connection with the negative cap 5 via the sleeve 62, while the pole 2 establishes an insulating connection with the negative cap 5 via the mounting sleeve 61.
In order to avoid leakage of electrolyte through the mounting hole 51 and contact with the negative electrode top cover 5, the present embodiment further provides a sealing member 7, one surface of the negative electrode top cover 5 facing the separator 4 is provided with an annular groove 52, the annular groove 52 is located at the outer peripheral side of the mounting hole 51, the sealing member 7 is disposed between the rivet 1 and the annular groove 52, and the sealing member 7 abuts against the outer peripheral wall of the rivet 1, the inner wall of the annular groove 52 and the surface of the separator 4. In this embodiment, the sealing member 7 is preferably a sealing ring, under the effect of the riveting member 1, the negative electrode top cover 5 and the spacer 4 axially extrude the sealing member 7 in the vertical direction, so as to realize the sealing between the sealing member 7 and the negative electrode top cover 5 and the spacer 4, and meanwhile, the riveting member 1 and the annular groove 52 radially extrude the sealing member 7, so that the sealing between the sealing member 7 and the riveting member 1 and the negative electrode top cover 5 can be realized, the sealing of the electrolyte leakage channel can be realized through the setting of the sealing member 7, and the electrolyte can be prevented from leaking onto the negative electrode top cover 5 through the mounting hole 51, thereby avoiding the corrosion of the negative electrode top cover 5.
As some embodiments, in this embodiment, the pole 2 is provided in a strip shape, the pole 2 is horizontally located at the center of the negative top cover 5, two riveting pieces 1 are symmetrically provided with respect to the center of the pole 2, and the two riveting pieces 1 are respectively connected with two ends of the pole 2 in the length direction. By such a structural arrangement, the rotation of the pole 2, the negative electrode top cover 5 and the negative electrode current collecting plate 3 can be avoided, and thus the rotation of the winding core 9 in the housing 8 is avoided.
The utility model discloses a cylindrical battery, which is shown by referring to fig. 3-5, and comprises a shell 8, a winding core 9, a positive electrode cover plate assembly 200 and a battery negative electrode cover plate assembly 100.
The winding core 9 is disposed in the housing 8, and the positive electrode cover plate assembly 200 is fixedly disposed at an opening end of the positive electrode of the housing 8 and connected with the positive electrode of the winding core 9, where the positive electrode cover plate assembly 200 in this embodiment is a conventional structure in the prior art. The battery negative electrode cover plate assembly 100 is fixedly connected with the negative electrode opening end of the shell 8 through the separator 4, and the negative electrode cover plate assembly 100 is connected with the negative electrode of the winding core 9 through the negative electrode current collecting disc 3.
In order to facilitate connection of the negative electrode cover plate assembly 100 and the negative electrode end of the casing 8, the present embodiment provides a mounting groove 81 on the inner peripheral wall of the negative electrode end of the casing 8, and in the process of inserting the negative electrode cover plate assembly 100 into the casing 8, the spacer 4 is horizontally disposed in the mounting groove 81, and the spacer 4 is in interference fit with the mounting groove 81, thereby realizing tight fit between the spacer 4 and the mounting groove 81.
In order to realize that the relative position of the isolation piece 4 in the mounting groove 81 is fixed, the depth of the mounting groove 81 is larger than the thickness of the isolation piece 4, and the arrangement is that the shell 8 and the top surface of the isolation piece 4 are conveniently covered by the squatting seal process, meanwhile, the isolation piece 4 and the mounting groove 81 are in interference fit, firm fit of the isolation piece 4 in the mounting groove 81 can be realized, and meanwhile, the reliability of sealing connection is guaranteed.
Further, the casing 8 tip that the mounting groove 81 corresponds is squatting and sealing the in-process, the casing perisporium can wrap the top surface of annular clamp portion, and then avoid casing 8 edge and the contact of negative pole top cap 5, realize that casing 8 and negative pole top cap 5 are insulating, and casing 8 opening edge can wrap the top surface of annular clamp portion 42 simultaneously, and at this moment, casing top compresses tightly isolator and negative pole apron, can realize radial and axial direction's dual closely fixed between whole negative pole apron subassembly 100 and the casing 8, can realize simultaneously through isolator 4 with the casing 8 between effective seal.
Preferably, since the mounting groove 81 is provided on the inner wall of the negative electrode end of the housing 8, the wall thickness of the housing 8 is reduced, and the structural strength of the housing 8 is reduced, in this embodiment, the thickened wall 82 is formed by thickening the outer peripheral wall of the housing 8 corresponding to the mounting groove 81, so that the structural strength is satisfied after the wall of the section of the housing 8 corresponding to the mounting groove 81.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (9)
1. A battery negative electrode cover plate component comprises a riveting piece (1), a negative electrode top cover (5), a pole column (2) and a negative electrode current collecting disc (3);
the method is characterized in that: the battery is characterized by further comprising a separator (4) made of an insulating material, wherein the pole (2), the negative electrode top cover (5), the separator (4) and the negative electrode current collecting disc (3) are sequentially connected through the riveting piece (1), and the separator (4) is used for being in sealing connection with the opening of the negative electrode end of the battery shell (8).
2. The battery negative electrode cover assembly of claim 1, wherein: the isolating piece (4) comprises a disc body (41) and an annular pressing part (42) fixedly arranged on the outer periphery of the disc body (41), the negative electrode top cover (5) is horizontally arranged on the surface of the disc body (41), and at least one part of the top surface of the negative electrode top cover (5) is covered by the annular pressing part (42).
3. The battery negative electrode cover assembly of claim 2, wherein: the battery further comprises an insulating piece (6), wherein the insulating piece (6) is arranged between the pole post (2) and the negative pole top cover (5);
the negative top cover (5) is provided with a mounting hole (51) for the riveting piece (1) to pass through;
the insulating piece (6) comprises a mounting sleeve (61) and a barrel sleeve (62), the mounting sleeve (61) is horizontally arranged on one surface of the negative electrode top cover (5) far away from the isolating piece (4), one end of the barrel sleeve (62) is inserted into the mounting hole (51), and the other end of the barrel sleeve is coaxially and fixedly connected with one surface of the mounting sleeve (61) facing the negative electrode top cover (5);
the pole (2) is arranged on the mounting sleeve (61), and the riveting piece (1) penetrates through the negative electrode current collecting disc (3), the isolating piece (4) and the barrel sleeve (62) and is connected with the pole (2).
4. The battery negative electrode cover assembly of claim 3, wherein: still include sealing member (7), negative pole top cap (5) orientation one side of separator (4) is provided with ring channel (52), ring channel (52) are located mounting hole (51) periphery side, sealing member (7) set up in rivet (1) with between ring channel (52), sealing member (7) with rivet (1) periphery wall, ring channel (52) inner wall and separator (4) surface butt.
5. The battery negative electrode cover assembly of any one of claims 2-4, wherein: the two riveting pieces (1) are symmetrically arranged relative to the center of the pole (2), and the two riveting pieces (1) are respectively connected with two ends of the pole (2) in the length direction.
6. A cylindrical battery comprising a housing (8), a winding core (9), a positive electrode cover plate assembly (200) and a battery negative electrode cover plate assembly according to any one of claims 2-5, characterized in that: the coil core (9) is arranged in the shell (8), the positive electrode cover plate assembly (200) is fixedly arranged at the positive electrode opening end of the shell (8) and is connected with the positive electrode of the coil core (9), the negative electrode cover plate assembly (100) is fixedly connected with the negative electrode opening end of the shell (8) through the isolating piece (4), and the negative electrode cover plate assembly (100) is connected with the negative electrode of the coil core (9) through the negative electrode collecting disc (3).
7. The cylindrical battery according to claim 6, wherein: the mounting groove (81) is formed in the inner peripheral wall of the negative end of the shell (8), the isolating piece (4) is horizontally arranged in the mounting groove (81), and the isolating piece (4) is in interference fit with the mounting groove (81).
8. The cylindrical battery according to claim 7, wherein: the depth of the mounting groove (81) is larger than the thickness of the isolation piece (4), and when the end part of the shell (8) corresponding to the mounting groove (81) squats towards the center of the shell (8), the top surface of the isolation piece (4) is horizontally wrapped by the peripheral wall of the shell (8).
9. The cylindrical battery according to claim 7, wherein: the thickened wall (82) is arranged on the peripheral wall of the shell (8) corresponding to the mounting groove (81).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320458053.2U CN219575781U (en) | 2023-03-06 | 2023-03-06 | Battery negative electrode cover plate assembly and cylindrical battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320458053.2U CN219575781U (en) | 2023-03-06 | 2023-03-06 | Battery negative electrode cover plate assembly and cylindrical battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219575781U true CN219575781U (en) | 2023-08-22 |
Family
ID=87658679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320458053.2U Active CN219575781U (en) | 2023-03-06 | 2023-03-06 | Battery negative electrode cover plate assembly and cylindrical battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219575781U (en) |
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2023
- 2023-03-06 CN CN202320458053.2U patent/CN219575781U/en active Active
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