CN220774535U - Cylindrical battery - Google Patents
Cylindrical battery Download PDFInfo
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- CN220774535U CN220774535U CN202322498784.2U CN202322498784U CN220774535U CN 220774535 U CN220774535 U CN 220774535U CN 202322498784 U CN202322498784 U CN 202322498784U CN 220774535 U CN220774535 U CN 220774535U
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- 238000004804 winding Methods 0.000 claims abstract description 83
- 239000012530 fluid Substances 0.000 claims description 15
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000008439 repair process Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 19
- 238000003466 welding Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model provides a cylindrical battery, comprising: the positive electrode shell and the negative electrode shell are both provided with an opening at one end; the winding core is arranged between the positive electrode shell and the negative electrode shell; the first insulating piece is detachably connected with the opening end of the positive electrode shell and the opening end of the negative electrode shell respectively; the positive electrode connecting piece is arranged between the positive electrode end of the winding core and the inner bottom surface of the positive electrode shell, one end of the positive electrode connecting piece is abutted against the positive electrode end of the winding core, and the other end of the positive electrode connecting piece is connected with the positive electrode shell; the negative electrode connecting piece is arranged between the negative electrode end of the winding core and the inner bottom surface of the negative electrode shell, one end of the negative electrode connecting piece is abutted against the negative electrode end of the winding core, and the other end of the negative electrode connecting piece is connected with the negative electrode shell. When the cylindrical battery disclosed by the utility model needs to be repaired, the positive electrode shell, the negative electrode shell and the first insulating piece can be directly disassembled, so that the maintenance or replacement of parts in the cylindrical battery is facilitated, and the repair operability of the cylindrical battery is greatly improved.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a cylindrical battery.
Background
Current lithium ion batteries can be generally divided into three directions: soft pack batteries, prismatic batteries, and cylindrical batteries. With the release of 4680 cylindrical batteries, full-tab cylindrical batteries become an important direction of lithium ion battery development. The current cylindrical battery mainly comprises the following components according to structural division: cover plate, casing and core. The winding core is responsible for providing battery energy, and the cover plate and the shell structure are combined together to mainly play roles in sealing the winding core, simultaneously connecting the winding core with the anode and the cathode and preventing the short circuit caused by the contact of the anode and the cathode.
At present, most of cylindrical battery shells are provided with openings at two ends, an anode cover plate assembly and a cathode cover plate assembly are respectively arranged at two ends of the shell and are respectively welded with lugs arranged at two ends of a winding core in the shell, and the cover plate is welded with the openings of the shell. The current cylindrical battery structure is assembled by adopting a welding process between the shell and the cover plate, and meanwhile, the cover plate and the winding core are welded through the current collecting disc, so that when the cylindrical battery breaks down, the whole cylindrical battery is difficult to disassemble and repair.
Disclosure of Invention
In view of the above, the present utility model provides a cylindrical battery to solve the problem of inconvenient repair of the cylindrical battery.
The technical scheme of the utility model is realized as follows:
the present utility model provides a cylindrical battery comprising:
the positive electrode shell and the negative electrode shell are both provided with an opening at one end;
the winding core is arranged between the positive electrode shell and the negative electrode shell;
the first insulating piece is detachably connected with the opening end of the positive electrode shell and the opening end of the negative electrode shell respectively;
the positive electrode connecting piece is arranged between the positive electrode end of the winding core and the inner bottom surface of the positive electrode shell, one end of the positive electrode connecting piece is abutted against the positive electrode end of the winding core, and the other end of the positive electrode connecting piece is connected with the positive electrode shell;
the negative electrode connecting piece is arranged between the negative electrode end of the winding core and the inner bottom surface of the negative electrode shell, one end of the negative electrode connecting piece is abutted against the negative electrode end of the winding core, and the other end of the negative electrode connecting piece is connected with the negative electrode shell.
On the basis of the technical scheme, preferably, the first insulating piece comprises an annular boss, a first barrel casing and a second barrel casing, the first barrel casing is fixedly arranged on the top surface of the annular boss, the second barrel casing is fixedly arranged on the bottom surface of the annular boss, the inner diameters of the first barrel casing, the annular boss and the second barrel casing are equal, the outer diameters of the first barrel casing and the second barrel casing are smaller than the outer diameter of the annular boss, the anode casing is sleeved on the outer peripheral wall of the first barrel casing, the opening end of the anode casing is connected with the top surface of the annular boss, the cathode casing is sleeved on the outer peripheral wall of the second barrel casing, and the opening end of the cathode casing is connected with the bottom surface of the annular boss.
Further, preferably, the inner wall of the positive electrode casing is provided with a first connecting groove matched with the first barrel casing, and the inner wall of the negative electrode casing is provided with a second connecting groove matched with the second barrel casing.
Still further, preferably, the first connecting groove inner wall is in threaded connection with the first sleeve outer wall, and the second connecting groove inner wall is in threaded connection with the second sleeve outer wall.
On the basis of the technical scheme, preferably, the negative electrode connecting piece comprises a negative electrode column and a negative electrode current collecting disc, a first mounting hole is formed in the closed end of the negative electrode shell, the negative electrode column is fixedly arranged on the second insulating piece, one end of the negative electrode column is connected with the negative electrode current collecting disc, the other end of the negative electrode column penetrates through the first mounting hole and is fixedly connected with the negative electrode shell, and the negative electrode current collecting disc is used for being abutted to the negative electrode end of the winding core.
Further, preferably, the negative electrode connecting piece further comprises a second insulating piece, a substrate, a third insulating piece, a sealing piece and a riveting piece, the negative electrode column, the third insulating piece, the substrate and the second insulating piece are fixedly connected through the riveting piece in sequence, the sealing piece is arranged between the riveting piece and the substrate, the riveting piece is connected with the negative electrode current collecting disc, the diameter of the substrate is smaller than that of the second insulating piece, the diameter of the second insulating piece is larger than or equal to that of the negative electrode current collecting disc, and the substrate is used for being connected with the first mounting hole.
On the basis of the technical scheme, preferably, the positive electrode connecting piece comprises a positive electrode current collecting disc, elastic overcurrent bodies, connecting discs and positive electrode columns, wherein the elastic overcurrent bodies are provided with a plurality of elastic overcurrent bodies, one ends of the elastic overcurrent bodies are fixedly connected with the connecting discs, the other ends of the elastic overcurrent bodies are fixedly connected with the positive electrode current collecting disc, the positive electrode columns are fixedly arranged at the center of one surface of the connecting discs, which is far away from the positive electrode current collecting disc, the positive electrode current collecting disc is used for being abutted against the positive electrode ends of the winding cores, the closed ends of the positive electrode shells are provided with second mounting holes, and the positive electrode columns penetrate through the second mounting holes and are fixedly connected with the positive electrode shells.
Further, it is preferable that a surface of the positive electrode collector plate, which is away from the connection plate, is provided with a plurality of protrusions.
Preferably, the positive pole is provided with a liquid injection hole, and the positive current collecting disc is provided with a plurality of liquid penetration holes.
Compared with the prior art, the utility model has the following beneficial effects:
(1) According to the cylindrical battery disclosed by the utility model, the two ends of the axial direction of the winding core are wrapped by arranging the positive electrode shell and the negative electrode shell with one open end, the positive electrode end of the winding core is electrically connected with the inner bottom surface of the positive electrode shell through the positive electrode connecting piece, the negative electrode end of the winding core is electrically connected with the inner bottom surface of the negative electrode shell through the negative electrode connecting piece, meanwhile, the positive electrode connecting piece and the negative electrode connecting piece are respectively electrically connected with the two ends of the winding core in an abutting mode, the welding mode connection is canceled, the winding core, the positive electrode shell and the negative electrode shell are easily separated, in addition, the first insulating piece is arranged, the opening ends of the positive electrode shell and the negative electrode shell are detachably connected with the first insulating piece, so that the positive electrode shell and the negative electrode shell are electrically isolated when being assembled and fixed, when the cylindrical battery needs to be repaired, the positive electrode shell, the negative electrode shell and the first insulating piece can be directly disassembled, so that the parts inside the cylindrical battery can be conveniently maintained or replaced, and the operability of the cylindrical battery is greatly improved;
(2) The battery shell with the bottom replaces the existing cover plate and shell structure, the number of battery parts is greatly reduced, meanwhile, the processing technology is simple, the production efficiency is high, the equipment investment is small, the manufacturing cost of battery structural members is greatly reduced, and the overall cost of the battery is reduced;
(3) The first connecting groove matched with the first barrel casing is formed in the inner wall of the positive electrode casing, the second connecting groove matched with the second barrel casing is formed in the inner wall of the negative electrode casing, and after the opening end of the positive electrode casing and the opening end of the negative electrode casing are connected through the first insulating piece, the inner diameters of the whole positive electrode casing, the whole negative electrode casing and the first insulating piece are consistent, so that the space of the winding core is fully utilized in the radial direction inside the casing, and the energy density of the winding core is improved;
(4) Through threaded connection between the inner wall of the first connecting groove and the outer wall of the first barrel casing, and threaded connection between the inner wall of the second connecting groove and the outer wall of the second barrel casing, the anode shell, the cathode shell and the first insulating piece are tightly and firmly connected in a threaded connection mode, so that the structural strength and stability after assembly connection are improved, and meanwhile, the assembly and disassembly efficiency of the cylindrical battery is improved;
(5) The substrate is arranged on one surface of the second insulating piece far away from the negative electrode current collecting disc, so that the negative electrode column is arranged on the substrate and is electrically isolated from the substrate, meanwhile, the diameter of the substrate is smaller than that of the second insulating piece, after the negative electrode connecting piece and the winding core are integrally arranged in the negative electrode shell, the substrate can penetrate through a first mounting hole of the negative electrode shell, and the substrate and the negative electrode shell are welded, so that the electrical isolation between the negative electrode column and the battery shell is realized, the negative electrode shell is ensured to be uncharged, and the safety of the cylindrical battery is improved;
(6) Through setting up a plurality of elasticity and cross fluid between connection pad and the anodal mass flow dish, with anodal connecting piece and the whole positive pole casing of inserting of core, can make the positive pole pass the second mounting hole of anodal casing, realize anodal pole and anodal casing welding, when anodal casing and negative pole casing are connected through first insulating part, under the compression of elasticity and cross fluid, realize anodal mass flow dish and the positive terminal butt of core, thereby realize anodal mass flow dish and the positive terminal lug electric connection of core, can dispense with the welding of anodal mass flow dish and core positive terminal, improve assembly efficiency, simultaneously, under the effect of elasticity and cross fluid, can fix a position the core at casing axial direction.
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 an exploded view of a first view of a cylindrical battery according to the present disclosure;
FIG. 2 is a second perspective exploded view of the cylindrical battery of the present disclosure;
FIG. 3 is a schematic perspective view of a negative electrode connector according to the present disclosure;
FIG. 4 is a schematic plan view of a negative electrode connector according to the present disclosure;
FIG. 5 is a plan cross-sectional view taken at A-A of FIG. 5;
FIG. 6 is a schematic view of a front perspective structure of a positive electrode connector according to the present disclosure;
FIG. 7 is a schematic view of a rear perspective view of a positive electrode connector according to the present utility model
Reference numerals:
1. a positive electrode case; 2. a negative electrode case; 3. a winding core; 4. a first insulating member; 5. a positive electrode connecting member; 6. a negative electrode connecting member; 41. an annular boss; 42. a first sleeve; 43. a second sleeve; 11. a first connection groove; 21. a second connecting groove; 61. a negative electrode column; 62. a negative electrode current collecting plate; 63. a second insulating member; 22. a first mounting hole; 64. a substrate; 65. a third insulating member; 66. a seal; 67. a rivet; 51. a positive electrode current collecting plate; 52. elastic fluid passing; 53. a connecting disc; 54. a positive electrode post; 12. a second mounting hole; 511. a protrusion; 541. a liquid injection hole; 512. and a liquid permeable hole.
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.
As shown in fig. 1, in combination with fig. 2, the present utility model provides a cylindrical battery including a positive electrode case 1, a negative electrode case 2, a winding core 3, a first insulating member 4, a positive electrode connecting member 5, and a negative electrode connecting member 6.
The positive electrode casing 1 and the negative electrode casing 2 are cylindrical casings with one open end, and can be made of steel shells or aluminum shells.
The winding core 3 is made of a positive plate, a negative plate and a diaphragm through a winding process, positive lugs and negative lugs are respectively arranged at two ends of the winding core 3, and the rolling operation of the positive lugs and the negative lugs is respectively realized at two ends of the winding core 3 through a rolling process.
The first insulator 4 is detachably connected to the open end of the positive electrode case 1 and the open end of the negative electrode case 2, respectively. In this embodiment, the first insulating member 4 has a ring structure, the inner diameter of the first insulating member 4 is larger than the outer diameter of the winding core 3, and as some preferred embodiments, the first insulating member is made of plastic or is not conductive.
The positive electrode connecting piece 5 is arranged between the positive electrode end of the winding core 3 and the inner bottom surface of the positive electrode shell 1, one end of the positive electrode connecting piece 5 is abutted against the positive electrode end of the winding core 3, the other end of the positive electrode connecting piece 5 is connected with the positive electrode shell 1, and the positive electrode connecting piece 5 is used for electrically connecting the positive electrode end of the winding core 3 with the positive electrode shell 1.
The negative electrode connecting piece 6 is arranged between the negative electrode end of the winding core 3 and the inner bottom surface of the negative electrode shell 2, one end of the negative electrode connecting piece 6 is abutted against the negative electrode end of the winding core 3, the other end of the negative electrode connecting piece 6 is connected with the negative electrode shell 2, and the negative electrode connecting piece 6 is used for electrically connecting the negative electrode end of the winding core 3 with the negative electrode shell 2.
According to the cylindrical battery disclosed by the utility model, the two ends of the winding core 3 in the axial direction are wrapped by arranging the positive electrode shell 1 and the negative electrode shell 2 with one end open, the positive electrode end of the winding core 3 and the inner bottom surface of the positive electrode shell 1 are electrically connected through the positive electrode connecting piece 5, the negative electrode end of the winding core 3 and the inner bottom surface of the negative electrode shell 2 are electrically connected through the negative electrode connecting piece 6, meanwhile, the positive electrode connecting piece and the negative electrode connecting piece are respectively and electrically connected with the two ends of the winding core in an abutting mode, the connection in a welding mode is cancelled, the winding core, the positive electrode shell and the negative electrode shell are conveniently separated easily, in addition, the first insulating piece is arranged, the opening ends of the positive electrode shell and the negative electrode shell are detachably connected with the first insulating piece, the positive electrode shell and the negative electrode shell are electrically isolated when being assembled and fixed, and when the cylindrical battery needs to be repaired, the positive electrode shell, the negative electrode shell and the first insulating piece can be directly disassembled, so that parts inside the cylindrical battery can be conveniently maintained or replaced, and the repair operability of the cylindrical battery is greatly improved.
It is worth noting that, the cylindrical battery disclosed in this embodiment adopts the battery shell with bottom to replace the existing cover plate and shell structure, the number of battery parts is greatly reduced, meanwhile, the processing technology is simple, the production efficiency is high, the equipment investment is small, the manufacturing cost of the battery structural member is greatly reduced, and the overall cost of the battery is reduced.
In order to achieve a stable and reliable insulating connection between the positive electrode housing 1 and the negative electrode housing 2 via the first insulating member 4, the present embodiment shows a preferred embodiment of the first insulating member 4.
Specifically, the first insulating member 4 includes an annular boss 41, a first sleeve 42 and a second sleeve 43, the first sleeve 42 is fixedly disposed on the top surface of the annular boss 41, the second sleeve 43 is fixedly disposed on the bottom surface of the annular boss 41, the inner diameters of the first sleeve 42, the annular boss 41 and the second sleeve 43 are equal, the outer diameters of the first sleeve 42 and the second sleeve 43 are smaller than the outer diameter of the annular boss 41, the positive electrode casing 1 is sleeved on the outer peripheral wall of the first sleeve 42, the open end of the positive electrode casing 1 is connected with the top surface of the annular boss 41, the negative electrode casing 2 is sleeved on the outer peripheral wall of the second sleeve 43, and the open end of the negative electrode casing 2 is connected with the bottom surface of the annular boss 41.
Thus, when the positive electrode casing 1 and the negative electrode casing 2 are connected, the positive electrode casing 1 can be sleeved on the outer peripheral wall of the first barrel casing 42 through the opening end, the inner wall of the positive electrode casing 1 is fixedly connected with the outer peripheral wall of the first barrel casing 42, the opening end face of the positive electrode casing 1 is connected with the top face of the annular boss 41, and accordingly, the negative electrode casing 2 is sleeved on the outer peripheral wall of the second barrel casing 43 through the opening end, the inner wall of the negative electrode casing 2 is fixedly connected with the outer peripheral wall of the second barrel casing 43, and the opening end face of the negative electrode casing 2 is connected with the bottom face of the annular boss 41. Therefore, the anode casing 1 is fixedly connected with the first barrel casing 42, the cathode casing 2 is fixedly connected with the second barrel body, and meanwhile, the annular boss 41 can realize isolation between the anode casing 1 and the cathode casing 2, so that contact short circuit between the anode casing 1 and the cathode casing 2 is avoided.
In the above embodiment, the positive electrode casing 1 is sleeved on the outer peripheral wall of the first sleeve 42, and the negative electrode casing 2 is sleeved on the outer peripheral wall of the second sleeve 43, so that the whole first insulating member 4 is located inside the casing, which results in an excessive gap between the winding core 3 and the positive electrode casing 1 and the negative electrode casing 2, and reduces the space utilization of the winding core 3 in the casing.
For this purpose, in the present embodiment, the first connection groove 11 is provided on the inner wall of the positive electrode case 1 to be fitted with the first sleeve 42, and the second connection groove 21 is provided on the inner wall of the negative electrode case 2 to be fitted with the second sleeve 43.
The arrangement ensures that the inner diameter of the positive electrode shell 1 is consistent with the inner diameter of the first barrel sleeve 42, the inner diameter of the negative electrode shell 2 is consistent with the inner diameter of the second barrel sleeve 43, and the inner diameters of the whole positive electrode shell 1, the negative electrode shell 2 and the first insulating piece 4 are consistent, so that the space of the winding core 3 is fully utilized in the radial direction of the inside of the shell, and the energy density of the winding core 3 is improved.
As some embodiments, the inner wall of the first connecting groove 11 and the outer wall of the first barrel 42, and the inner wall of the second connecting groove 21 and the outer wall of the second barrel 43 may be fixedly connected by sealant. When the positive electrode shell and the negative electrode shell are disassembled, the joint of the positive electrode shell and the negative electrode shell is heated only to melt the sealant, so that the positive electrode shell, the negative electrode shell and the first insulating piece can be separated.
As some preferred embodiments, the inner wall of the first connecting groove 11 is in threaded connection with the outer wall of the first barrel casing 42, and the inner wall of the second connecting groove 21 is in threaded connection with the outer wall of the second barrel casing 43, so that the positive electrode casing 1, the negative electrode casing 2 and the first insulating member 4 are tightly and firmly connected in a threaded connection manner, the structural strength and stability after assembly connection are improved, and meanwhile, the assembly and disassembly efficiency of the cylindrical battery can be improved.
In order to realize that the negative electrode of the winding core 3 is led out from the negative electrode casing 2 by the negative electrode connector 6, this embodiment shows a preferred embodiment of negative electrode connection, specifically, referring to fig. 3-6, the negative electrode connector 6 includes a negative electrode post 61 and a negative electrode current collecting plate 62, the closed end of the negative electrode casing 2 is provided with a first mounting hole 22, the diameter of the first mounting hole 22 is smaller than the inner diameter of the negative electrode casing 2, one end of the negative electrode post 61 is connected with the negative electrode current collecting plate 62, and the other end passes through the first mounting hole 22 and is fixedly connected with the negative electrode casing 2.
By adopting the above technical scheme, the negative electrode connecting piece 6 is placed at the negative electrode end of the winding core 3, the negative electrode column 61 passes through the first mounting hole 22, the negative electrode column 61 is welded with the first mounting hole 22, and when the positive electrode shell and the negative electrode shell are assembled and connected, the negative electrode end of the winding core is abutted with the negative electrode current collecting disc, so that the negative electrode end of the winding core is electrically connected with the negative electrode shell through the negative electrode current collecting disc, the negative electrode column and the negative electrode shell. With such a structural arrangement, the whole negative electrode connecting member 6 occupies less space in the axial direction of the battery case, thereby improving the space utilization of the winding core 3 inside the battery, and improving the battery energy density.
In the above embodiment, the negative electrode casing 2 is electrically connected to the negative electrode terminal of the winding core 3 through the negative electrode post 61, the negative electrode casing 2 is negatively charged, and since the positive electrode casing 1 and the negative electrode casing 2 are electrically isolated by the annular boss 41 on the first insulating member 4, the width of the annular boss 41 is limited, which easily causes the short circuit phenomenon to occur in the positive electrode casing 1 and the negative electrode casing 2 in some cases.
For this reason, the present embodiment adopts some technical means to uncharged the anode casing 2, and the specific scheme is as follows.
The negative electrode connecting piece 6 further comprises a second insulating piece 63, a base plate 64, a third insulating piece 65, a sealing piece 66 and a riveting piece 67, the negative electrode column 61, the third insulating piece 65, the base plate 64 and the second insulating piece 63 are fixedly connected through the riveting piece 67 in sequence, the sealing piece 66 is arranged between the riveting piece 67 and the base plate 64, the riveting piece 67 is connected with the negative electrode current collecting disc 62, the diameter of the base plate 64 is smaller than that of the second insulating piece 63, the diameter of the second insulating piece 63 is larger than or equal to that of the negative electrode current collecting disc 62, and the base plate 64 is used for being connected with the first mounting hole 22.
By adopting the above technical scheme, after the negative electrode connecting piece 6 and the winding core 3 are integrally arranged in the negative electrode shell 2, the substrate 64 passes through the first mounting hole 22, so that the substrate 64 and the negative electrode shell 2 are subjected to laser welding at the matching position of the mounting hole 22 through An Di, at the moment, the negative electrode column 61 and the substrate 64 are electrically isolated through the third insulating piece 65, the negative electrode current collecting disc 62 and the negative electrode shell are electrically isolated, the negative electrode column 61 and the negative electrode shell can be prevented from being electrically connected, the negative electrode shell 2 is not electrified, and the safety of the cylindrical battery is ensured.
The riveting process is utilized to rivet the negative electrode post 61, the third insulating member 65, the substrate 64 and the second insulating member 63 through the riveting member 67, so that partial assembly of the negative electrode connecting member 6 is realized, the negative electrode current collecting disc 62 is finally placed on the bottom surface of the second insulating member 63, and the riveting member 67 and the negative electrode current collecting disc 62 are welded through penetration welding, so that manufacturing of the negative electrode connecting member 6 is completed.
By providing the seal 66 between the rivet 67 and the substrate 64, the sealability of the negative electrode connector 6 can be improved, and leakage of the electrolyte can be avoided.
When the cylindrical battery of this embodiment is assembled, the negative electrode connecting piece 6 and the winding core 3 are integrally installed in the negative electrode casing 2, the positive electrode connecting piece 5 is placed at the positive electrode end of the winding core 3, the positive electrode casing 1 is sleeved at the positive electrode end of the winding core 3, the positive electrode casing 1 and the negative electrode casing 2 are fixedly connected in an insulating manner through the first insulating piece 4, and then the welding between the substrate 64 on the negative electrode connecting piece and the negative electrode casing 2 is completed.
Because the positive electrode shell 1 and the negative electrode shell 2 have certain precision errors in the assembly process, a certain fit clearance exists between the positive electrode connecting piece 5 and the positive electrode shell 1, and the risk of poor contact among the positive electrode connecting piece 5, the winding core 3 and the positive electrode shell 1 is easy to occur.
For this reason, in the present embodiment, the positive electrode connecting member 5 is structurally configured, specifically, referring to fig. 7, the positive electrode connecting member 5 includes a positive electrode current collecting plate 51, an elastic fluid passing body 52, a connecting plate 53 and a positive electrode post 54, the elastic fluid passing body 52 is provided with a plurality of elastic fluid passing bodies, one end of the elastic fluid passing body 52 is fixedly connected with the connecting plate 53, the other end is fixedly connected with the positive electrode current collecting plate 51, the positive electrode post 54 is fixedly disposed at a center of a surface of the connecting plate 53 far away from the positive electrode current collecting plate 51, the positive electrode current collecting plate 51 is used for abutting against the positive electrode end of the winding core 3, the closed end of the positive electrode casing 1 is provided with a second mounting hole 12, and the positive electrode post 54 is fixedly connected with the positive electrode casing 1 through the second mounting hole 12.
By adopting the technical scheme, the positive electrode connecting piece 5 and the winding core 3 are integrally inserted into the positive electrode shell 1, the positive electrode column 54 can penetrate through the second mounting hole 12 of the positive electrode shell 1, the positive electrode column 54 and the positive electrode shell 1 are welded, when the positive electrode shell 1 and the negative electrode shell 2 are connected through the first insulating piece 4, the positive electrode collecting disc 51 is abutted with the positive electrode end of the winding core 3 under the compression of the elastic overcurrent body 52, so that the positive electrode collecting disc 51 is electrically connected with the positive electrode lug of the winding core 3, the welding of the positive electrode collecting disc 51 and the positive electrode end of the winding core 3 can be omitted, the assembly efficiency is improved, and meanwhile, the winding core 3 can be positioned in the axial direction of the shell under the action of the elastic overcurrent body 52, so that reliable electrical connection among the positive electrode shell 1, the positive electrode connecting piece 5 and the winding core 3 is realized.
In addition, the positive electrode current collecting disc, the negative electrode current collecting disc and the two ends of the winding core are electrically connected in an abutting mode, so that the winding core can be conveniently separated from the shell during repairing, and the winding core can be conveniently replaced or maintained.
In this embodiment, the elastic fluid 52 is a spring made of conductive material.
Preferably, the positive electrode current collecting disc is provided with a plurality of bulges on one surface far away from the connecting disc, so that the positive electrode current collecting disc can be fully contacted with the lug of the winding core through the bulges when the positive electrode current collecting disc is pressed with the lug of the winding core through elastic fluid passing, and the overcurrent capacity is improved.
Preferably, the positive electrode column 54 is provided with a liquid injection hole 541, and the positive electrode current collecting plate 51 is provided with a plurality of liquid permeation holes 512. After the cylindrical battery is assembled, electrolyte can be injected into the battery shell through the electrolyte injection holes 541, and the electrolyte can infiltrate around the winding core 3 through the electrolyte permeation holes 512.
The cylindrical battery assembly process of the utility model is as follows;
the method comprises the steps of placing a negative electrode connecting piece at the negative electrode end of a winding core, sleeving a negative electrode shell at the negative electrode end of the winding core, enabling a substrate on the negative electrode connecting piece to penetrate through a first mounting hole of the negative electrode shell, placing a positive electrode connecting piece at the positive electrode end of the winding core, sleeving a first insulating piece on the winding core, sleeving a positive electrode shell at the positive electrode end of the winding core, and enabling the positive electrode shell and the open end of the negative electrode shell to be in threaded connection through the first insulating piece.
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 cylindrical battery, comprising:
the positive electrode shell (1) and the negative electrode shell (2), wherein the positive electrode shell (1) and the negative electrode shell (2) are both provided with an opening at one end;
the winding core (3) is arranged between the positive electrode shell (1) and the negative electrode shell (2);
the first insulating piece (4) is detachably connected with the opening end of the positive electrode shell (1) and the opening end of the negative electrode shell (2) respectively;
the positive electrode connecting piece (5) is arranged between the positive electrode end of the winding core (3) and the inner bottom surface of the positive electrode shell (1), one end of the positive electrode connecting piece (5) is abutted against the positive electrode end of the winding core (3), and the other end of the positive electrode connecting piece is connected with the positive electrode shell (1);
the negative electrode connecting piece (6) is arranged between the negative electrode end of the winding core (3) and the inner bottom surface of the negative electrode shell (2), one end of the negative electrode connecting piece (6) is abutted against the negative electrode end of the winding core (3), and the other end of the negative electrode connecting piece is connected with the negative electrode shell (2).
2. The cylindrical battery according to claim 1, wherein: the first insulating piece (4) comprises an annular boss (41), a first barrel casing (42) and a second barrel casing (43), the first barrel casing (42) is fixedly arranged on the top surface of the annular boss (41), the second barrel casing (43) is fixedly arranged on the bottom surface of the annular boss (41), the inner diameters of the first barrel casing (42), the annular boss (41) and the second barrel casing (43) are equal, the outer diameters of the first barrel casing (42) and the second barrel casing (43) are smaller than the outer diameter of the annular boss (41), the positive electrode casing (1) is sleeved on the outer peripheral wall of the first barrel casing (42), the opening end of the positive electrode casing (1) is connected with the top surface of the annular boss (41), the negative electrode casing (2) is sleeved on the outer peripheral wall of the second barrel casing (43), and the opening end of the negative electrode casing (2) is connected with the bottom surface of the annular boss (41).
3. The cylindrical battery according to claim 2, wherein: the inner wall of the positive electrode shell (1) is provided with a first connecting groove (11) matched with the first barrel sleeve (42), and the inner wall of the negative electrode shell (2) is provided with a second connecting groove (21) matched with the second barrel sleeve (43).
4. A cylindrical battery according to claim 3, wherein: the inner wall of the first connecting groove (11) is in threaded connection with the outer wall of the first barrel sleeve (42), and the inner wall of the second connecting groove (21) is in threaded connection with the outer wall of the second barrel sleeve (43).
5. The cylindrical battery according to claim 1, wherein: the negative electrode connecting piece (6) comprises a negative electrode column (61) and a negative electrode current collecting disc (62), a first mounting hole (22) is formed in the closed end of the negative electrode shell (2), one end of the negative electrode column (61) is connected with the negative electrode current collecting disc (62), the other end of the negative electrode column passes through the first mounting hole (22) and is fixedly connected with the negative electrode shell (2), and the negative electrode current collecting disc (62) is used for being abutted to the negative electrode end of the winding core.
6. The cylindrical battery according to claim 5, wherein: the negative electrode connecting piece (6) further comprises a second insulating piece (63), a base plate (64), a third insulating piece (65), a sealing piece (66) and a riveting piece (67), wherein the negative electrode column (61), the third insulating piece (65), the base plate (64) and the second insulating piece (63) are fixedly connected through the riveting piece (67) in sequence, the sealing piece (66) is arranged between the riveting piece (67) and the base plate (64), the riveting piece (67) is connected with the negative electrode current collecting disc (62), the diameter of the base plate (64) is smaller than that of the second insulating piece (63), the diameter of the second insulating piece (63) is larger than or equal to that of the negative electrode current collecting disc (62), and the base plate (64) is used for being connected with the first mounting hole (22).
7. The cylindrical battery according to claim 1, wherein: the positive pole connecting piece (5) comprises a positive pole current collecting disc (51), elastic fluid passing bodies (52), connecting discs (53) and positive pole columns (54), wherein the elastic fluid passing bodies (52) are provided with a plurality of elastic fluid passing bodies (52), one ends of the elastic fluid passing bodies (52) are fixedly connected with the connecting discs (53), the other ends of the elastic fluid passing bodies are fixedly connected with the positive pole current collecting disc (51), the positive pole columns (54) are fixedly arranged at the center of one surface of the connecting discs (53) far away from the positive pole current collecting disc (51), the positive pole current collecting disc (51) is used for being abutted against the positive pole end of the winding core (3), the second mounting holes (12) are formed in the closed ends of the positive pole shells (1), and the positive pole columns (54) penetrate through the second mounting holes (12) to be fixedly connected with the positive pole shells (1).
8. The cylindrical battery according to claim 7, wherein: a plurality of bulges (511) are arranged on one surface of the positive electrode current collecting disc (51) far away from the connecting disc (53).
9. The cylindrical battery according to claim 7 or 8, wherein: the positive pole (54) is provided with a liquid injection hole (541), and the positive current collecting disc (51) is provided with a plurality of liquid permeation holes (512).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322498784.2U CN220774535U (en) | 2023-09-13 | 2023-09-13 | Cylindrical battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322498784.2U CN220774535U (en) | 2023-09-13 | 2023-09-13 | Cylindrical battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220774535U true CN220774535U (en) | 2024-04-12 |
Family
ID=90619499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322498784.2U Active CN220774535U (en) | 2023-09-13 | 2023-09-13 | Cylindrical battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220774535U (en) |
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2023
- 2023-09-13 CN CN202322498784.2U patent/CN220774535U/en active Active
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