CN115911773A - Full-lug cylindrical power battery and preparation method thereof - Google Patents
Full-lug cylindrical power battery and preparation method thereof Download PDFInfo
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- CN115911773A CN115911773A CN202211379340.0A CN202211379340A CN115911773A CN 115911773 A CN115911773 A CN 115911773A CN 202211379340 A CN202211379340 A CN 202211379340A CN 115911773 A CN115911773 A CN 115911773A
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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
Abstract
The invention provides a full-lug cylindrical power battery and a preparation method thereof, wherein the full-lug cylindrical power battery comprises a battery shell, a pole and a first current collecting disc, wherein the battery shell is provided with an opening; the pole comprises a pole body and an annular flange part; the pole body penetrates through one end, far away from the opening, of the battery shell, the pole body is electrically insulated from the battery shell, a liquid injection hole is formed in the pole body, and an annular flange part is formed by extending part of the pole body into the liquid injection hole; the first current collecting disc comprises a first current collecting disc body and a riveting part, the first current collecting disc body is positioned in the battery shell and abuts against the pole, part of the first current collecting disc body extends into the liquid injection hole to form the riveting part, and the riveting part is turned over and riveted on the annular flange part; the first current collecting disc is provided with a through hole penetrating through the first current collecting disc body and the riveting part. According to the structure, the pole and the current collecting disc adopt a connecting structure for fixing the turn-riveting, so that welding spots do not exist, and the technical problems of residual welding slag in the battery, core scratching by a welding head, welding stress deformation and the like can be avoided.
Description
Technical Field
The invention relates to the technical field of battery production, in particular to a full-lug cylindrical power battery and a preparation method thereof.
Background
The cylindrical battery is a common battery type, and mainly comprises a battery shell, a winding core, a current collecting disc, a pole, a sealing element and other parts, wherein when the cylindrical battery is processed, the winding core, the current collecting disc and the pole are connected in a welding mode. However, the welding method has certain technical problems.
The invention discloses a cylindrical lithium battery and a preparation method thereof, belonging to the technical field of lithium batteries. The cylindrical lithium battery comprises a steel shell and a cylindrical pole group, wherein the steel shell comprises a steel shell substrate and an opening end opposite to the steel shell substrate. The cylindrical pole group comprises a positive plate, a negative plate and a diaphragm, wherein a positive tab is arranged on the positive plate, a negative tab is arranged on the negative plate, the diaphragm and the positive plate are sequentially stacked and then wound into the cylindrical pole group, the positive tab and the negative tab are respectively arranged at two ends of the cylindrical pole group, one end of the negative tab faces the steel shell substrate, and the cylindrical pole group is placed into the steel shell; the positive lug is led out from the opening end and is welded and connected with the positive terminal; the steel shell substrate is in conductive connection with the negative pole lug through laser welding.
According to the technical scheme, the positive lug is welded with the positive current collecting disc, and the positive current collecting disc is welded with the positive terminal (positive post). In the preparation method, the welding spots of the battery are more, and the welding spots are easy to lose effectiveness to cause short circuit risks in the assembling process and the using process of the battery. Like a pole fixed by a partial rivet-turning structure, the pole needs to be riveted and connected with a top cover of a battery, and the pole and a winding core can shake in the rivet-turning process, so that welding spot failure is easily caused; in addition, the preparation method also has the problem that the concentric positioning of the positive pole column and the positive pole current collecting disc is difficult, and if welding has deviation, parts are easy to scrap, and the yield is influenced.
Another invention patent application with application publication No. CN114914515A discloses a lithium battery and a preparation method thereof, wherein the lithium battery comprises: the casing, roll up the core, anodal current collector, insulating circle and lid subassembly, the casing is equipped with and holds the chamber, it locates and holds the intracavity to roll up the core, the positive pole of rolling up the core is located uncovered department, anodal current collector includes first disk body and first arch, first disk body is connected with the positive pole of rolling up the core, first arch extends along first disk body axial, insulating snare is located on the first disk body, the lid subassembly includes the rivet, the apron, insulating subassembly and sealed nail, the rivet is equipped with first through-hole, the internal face of first through-hole is located in the laminating of first arch, the apron passes through insulating subassembly and insulating circle and rivet connection, sealed nail is located in the first through-hole, laminate with first arch, will roll up anodal and anodal current collector direct weld, anodal current collector passes through first arch and rivet and sealed nail direct weld.
According to the technical scheme, the first bulge is arranged on the first disc body on the positive current collecting disc and fixedly connected with the first bulge through the rivet and the sealing nail, the rivet is equivalent to the positive pole, the first bulge is located in the first through hole of the rivet, and the sealing nail is located in the first bulge to be matched with the rivet to clamp the first bulge for fixing. When the sealing nail is assembled, the first bulge needs to be reamed to facilitate the installation of the sealing nail, but the process has high requirement on the quality of the first bulge, otherwise, the first bulge is easily torn due to reaming, so that the sealing effect is influenced; the first bulge plays a role in current carrying, and the tearing can also affect the current carrying capacity; secondly, in order to guarantee the stability of assembly, rivet, sealed nail and first arch need carry out welded fastening, and the stress that the welding produced easily leads to rivet, sealed nail and first arch extrusion deformation each other, and after the solder joint cooling, there is the inefficacy risk in the battery.
The connection mode needs to extend the ultrasonic torque welding head into the battery to perform welding operation, so that welding slag is easily left in the battery, and the safety performance of the battery is affected; secondly, the welding work of part battery, ultrasonic wave moment of torsion bonding tool are stretched into the battery from the negative pole end, and the bonding tool needs to pass through the centre bore of rolling up the core, then welds anodal current collector dish and positive post, and it is sealed to install the negative pole apron again after the welding, and this kind of welding mode has the problem that the bonding tool easily scratched the book core, if leads to rolling up the damage of core diaphragm, can lead to the battery to become invalid, has the potential safety hazard.
As can be seen from the above, the main pole problem of the assembly connection structure of the current cylindrical battery is in the connection manner of the current collecting plate and the pole, and thus, it is required to improve it.
Disclosure of Invention
In view of the above, the invention provides a full-tab cylindrical power battery and a preparation method thereof, and the full-tab cylindrical power battery has the advantages of few welding spots, stable sealing structure and no damage to the battery.
The technical scheme of the invention is realized as follows:
on one hand, the invention provides a full-lug cylindrical power battery and a preparation method thereof, comprising a battery shell, a pole and a first current collecting disc, wherein,
the battery shell is provided with an opening;
the pole comprises a pole body and an annular flange part;
the pole body penetrates through one end, far away from the opening, of the battery shell, the pole body is electrically insulated from the battery shell, a liquid injection hole is formed in the pole body, and an annular flange part is formed by extending part of the pole body into the liquid injection hole;
the first current collecting disc comprises a first current collecting disc body and a riveting part, the first current collecting disc body is positioned in the battery shell and abuts against the pole column, part of the first current collecting disc body extends into the liquid injection hole to form the riveting part, and the riveting part is turned over and riveted on the annular flange part; the first current collecting disc is provided with a through hole which penetrates through the first current collecting disc body and the riveting part.
On the basis of the technical scheme, preferably, the end, inserted into the liquid injection hole, of the riveting part is provided with a plurality of grooves in an annular array.
In addition to the above technical solution, preferably, an inclined chamfer is provided on a surface of the annular flange portion facing the first collecting plate.
On the basis of the technical scheme, the sealing device preferably further comprises a sealing rubber plug, wherein the sealing rubber plug comprises a first sealing part and a second sealing part,
the first sealing part is positioned in the liquid injection hole and abuts against the riveting part;
the first sealing part extends into the through hole to form a second sealing part.
On the basis of the above technical scheme, preferably, the rivet turning part of the first sealing part corresponding to the riveting part is provided with a containing groove, and the inner surface of the containing groove abuts against the riveting part.
On the basis of the technical scheme, the aluminum sheet is preferred, the aluminum sheet supports against one end, away from the riveting part, of the sealing rubber plug, and the aluminum sheet is welded and fixed with the pole.
On the basis of the technical scheme, preferably, the middle part of the aluminum sheet is provided with a plurality of stress grooves.
On the basis of the technical scheme, the battery pole post structure is preferable and further comprises a sealing element, wherein the sealing element is arranged between the battery shell and the pole post and used for electrically insulating the battery shell and the pole post.
On the basis of the technical scheme, the device preferably further comprises a winding core, a second collecting tray and a cover plate, wherein,
the winding core is positioned in the battery shell, and one end of the winding core is electrically connected with the first current collecting disc;
the second current collecting disc is electrically connected with the negative end of the winding core;
the cover plate seals the opening.
In another aspect, the invention provides a method for preparing the above full-tab cylindrical power battery, which comprises the following steps:
s1, firstly, mounting a pole on a battery shell;
s2, winding the pole piece to form a winding core, kneading and flattening the pole ear of the winding core, and welding the first current collecting disc and the second current collecting disc at two ends of the winding core oppositely;
s3, welding the first current collecting disc, the second current collecting disc and the winding core into a whole, and then loading the whole into a battery shell through an opening, wherein the first current collecting disc is firstly inserted into the battery shell until the riveting part is inserted into a liquid injection hole of the terminal;
s4, applying pressure to the second current collecting disc to enable the first current collecting disc to tightly abut against the pole, and then turning and riveting the riveting part to be fixed on the annular flange part;
s5, welding a cover plate and the battery shell to seal the opening, wherein the cover plate is electrically connected with the second current collecting disc;
s6, injecting electrolyte into the full-lug cylindrical power battery through an electrolyte injection hole of the pole;
and S7, sealing the liquid injection hole.
Compared with the prior art, the full-lug cylindrical power battery has the following beneficial effects:
(1) The riveting part is arranged on the first current collecting disc and is inserted into the pole for riveting, so that the components do not need to be welded, and the problems of welding spot failure, core scratching, residual welding slag in the battery and component deformation caused by welding stress can be avoided; and during assembly, the first current collecting disc is turned and riveted after being in close contact with the pole, so that the turned and riveted part is not easy to loosen, and the failure probability can be obviously reduced.
(2) Through set up the recess on riveting portion, it makes riveting portion can be more convenient when turning over the riveting, and can avoid riveting portion to tear.
(3) The liquid injection hole of the sealed pole is plugged by using the sealing rubber, and the sealing rubber plug is provided with the accommodating groove for accommodating the rivet turning part of the riveting part, so that the rivet turning part of the riveting part can be pressed after the sealing rubber plug is installed, the rivet turning stability can be further improved, and the rivet turning part of the riveting part is prevented from loosening.
(4) The sealing rubber plug is fixed by the aluminum sheet, and the stress groove is formed in the aluminum sheet, so that the welding stress can be released by the stress groove during welding, and the sealing effect is prevented from being influenced by pole deformation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a perspective view of a full lug cylindrical power cell of the present invention;
fig. 2 is an axial cross-sectional structural view of a full-tab cylindrical power battery of the present invention;
fig. 3 is an exploded view of the full tab cylindrical power cell of the present invention;
fig. 4 is a structural diagram of a point a in fig. 2 of the all-tab cylindrical power battery of the present invention;
fig. 5 is a structural diagram of a point B in fig. 2 of the full-tab cylindrical power battery of the invention;
fig. 6 is a sealing glue block structure diagram of the full-tab cylindrical power battery of the invention;
fig. 7 is an aluminum sheet structure view of the full-tab cylindrical power battery of the present invention;
fig. 8 is a polar column section structure diagram of the full-polar-ear cylindrical power battery of the invention;
fig. 9 is a first current collector block diagram of a full-tab cylindrical power cell of the present invention;
fig. 10 is a structural diagram of a riveted part of a full-tab cylindrical power battery of the invention before riveting in a turning manner;
fig. 11 is a structural diagram of the riveted part of the full-tab cylindrical power battery of the invention after being riveted by flanging;
fig. 12 is a structural view of a riveted annular flange part of a riveted part of the full-lug cylindrical power battery of the invention;
fig. 13 is a cross-sectional view of the battery case of the full tab cylindrical power battery of the present invention;
in the figure: the battery comprises a battery shell 1, an opening 101, an electrode post 2, an electrode post body 21, an annular flange part 22, a liquid injection hole 201, an inclined chamfer 202, a first current collecting disc 3, a first current collecting disc body 31, a riveting part 32, a through hole 301, a groove 302, a sealing rubber plug 4, a first sealing part 41, a second sealing part 42, an accommodating groove 401, an aluminum sheet 5, a stress groove 501, a sealing element 6, a winding core 7, a second current collecting disc 8, a cover plate 9, an insulating plate 10 and a turning riveting block 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1 to 13, the all-tab cylindrical power battery of the invention comprises a battery shell 1, a post 2, a first current collecting disc 3, a sealing rubber plug 4, an aluminum sheet 5, a sealing element 6, a winding core 7, a second current collecting disc 8 and a cover plate 9.
Wherein the battery case 1 is provided with an opening 101; the pole 2 comprises a pole body 21 and an annular flange portion 22; the post body 21 penetrates through an end of the battery case 1 away from the opening 101, and the post body 21 is electrically insulated from the battery case 1.
The polar column 2 can be connected with the battery shell 1 in a rivet turning mode, and the rivet turning fixing structure has the advantages of convenience in connection and stable structure.
Specifically, the sealing element 6 of the full-lug cylindrical power battery is arranged between the battery shell 1 and the pole 2 and is used for electrically insulating the battery shell 1 and the pole 2; the terminal post 2 is provided with a rivet-turning pressing block 11, when the terminal post 2 is riveted, the terminal post 2 is riveted on the rivet-turning pressing block 11 in a turning mode, and the sealing element 6 is tightly abutted through the rivet-turning pressing block 11.
The structure of the sealing element 6 in the device is not limited, and the sealing element can be formed by injection molding, and can also be sealed by adopting components such as plastic cement, a sealing ring and the like in the prior art so as to insulate the pole 2 and the battery shell 1.
In the drawing, the symbol S indicates the center hole of the winding core 7, and in the conventional welding method, an ultrasonic torque welding head is inserted from the negative electrode end of the battery through the center hole S to weld the pole post 2 and the first current collecting plate 3. When the welding head works, the welding head easily scratches the winding core 7 to cause damage, welding slag is easily remained, the safety performance of the battery can be affected, and the accuracy of internal welding is difficult to control.
In order to solve the problem of welding the existing pole and the pole current collecting disc, in the technical scheme, the pole and the current collecting disc are connected through a turning riveting process.
Specifically, the pole body 21 is provided with a liquid injection hole 201, and the pole body 21 partially extends into the liquid injection hole 201 to form an annular flange portion 22; the first current collecting disc 3 comprises a first current collecting disc body 31 and a riveting part 32, the first current collecting disc body 31 is positioned in the battery shell 1 and abuts against the pole 2, the part of the first current collecting disc body 31 extends into the liquid injection hole 201 to form the riveting part 32, and the riveting part 32 is turned over and riveted on the annular flange part 22; the first manifold plate 3 has a through hole 301 penetrating the first manifold plate body 31 and the caulking portion 32.
Further, as shown in fig. 8, in order to improve the ease of inserting the caulking portion 32 into the pole 2, a chamfered corner 202 is provided on a surface of the annular flange portion 22 facing the first current collecting plate 3. The inclined chamfer 202 can play a role in guiding, so that the riveting part 32 can be conveniently inserted into the liquid injection hole 201 of the pole 2, and the riveting part 32 can be prevented from colliding with the pole 2 to shift during assembly.
As described above, in the assembly process, the first current collecting plate 3 is inserted into the injection hole 201 of the pole 2 through the caulking portion 32, and then the caulking portion 32 is crimped to the annular flange portion 22. The shape of the first manifold plate 3 is shown in fig. 9, the shape before the caulking portion 32 is caulked is shown in fig. 10, the shape after caulking is shown in fig. 11, and the caulking structure is shown in fig. 12. The connecting structure does not need welding, so that the technical problems of welding slag residue caused by welding, welding stress deformation, easy scratching of the winding core 7 caused by inserting the welding head into the welding and the like can be avoided. Meanwhile, the riveting part 32 can realize concentric positioning of the first current collecting disc 3 and the pole 2, and is beneficial to improving the connection stability of the assembly and the convenience of subsequent assembly.
Since the caulking portion 32 is caulked outwardly against the annular flange portion 22 of the post 2, a plurality of grooves 302 are formed at the end of the caulking portion 32 inserted into the injection hole 201, and the plurality of grooves 302 are arranged in an annular array on the caulking portion 32, in order to improve ease of caulking. Therefore, the riveting part 32 can be turned and riveted conveniently, the tearing situation can not occur, and the structural stability can be ensured.
In order to ensure the structural stability of the rivet 32 to the maximum extent, the depth of the groove 302 may be set to be the same as the length of the rivet turned portion of the rivet 32. So as to avoid the overlong groove 302 causing the rivet structure to be unstable, and simultaneously, to be beneficial to improving the current-carrying capacity of the rivet part 32.
In order to avoid the first current collecting plate 3 from contacting the battery case 1 due to vibration and the like, an insulating plate 10 is provided between the first current collecting plate 3 and the battery case 1 to insulate the battery case 1 from the first current collecting plate 3.
In the present technical solution, a sealant block 4 is further provided, as shown in fig. 4 and fig. 6, the sealant block 4 includes a first sealing portion 41 and a second sealing portion 42, wherein the first sealing portion 41 is located in the liquid injection hole 201 and abuts against the riveting portion 32; the first seal portion 41 extends into the through hole 301 to form a second seal portion 42. In this way, the liquid filling hole 201 can be completely closed by the sealant 4 to prevent liquid leakage.
Further, the first sealing portion 41 is provided with a receiving groove 401 corresponding to the rivet-turned portion of the rivet portion 32, and an inner surface of the receiving groove 401 abuts against the rivet portion 32. So, can reduce the height that the sealant blocked up 4, prevent to influence the finished product height of battery, and can be better spacing to riveting portion 32.
After the liquid injection hole 201 is sealed by the sealant block 4, the sealant block 4 needs to be further fixed, so that an aluminum sheet 5 is arranged on the sealant block 4, the aluminum sheet 5 abuts against one end of the sealant block 4 away from the riveting part 32, and the aluminum sheet 5 is welded and fixed with the pole 2. Therefore, the aluminum sheet 5 can prevent the sealing rubber plug 4 from falling off.
However, since the aluminum sheet 5 is fixed by welding, stress is generated due to temperature difference change during welding, as shown in fig. 7, in order to avoid unevenness of the top surface of the pole 2 caused by deformation of the aluminum sheet 5, a plurality of stress grooves 501 are formed in the middle of the aluminum sheet 5. Thus, during welding, the aluminum sheet 5 expands into the stress groove 501 to release the welding stress, thereby preventing the aluminum sheet 5 from bulging.
The winding core 7 is positioned in the battery shell 1, and one end of the winding core 7 is electrically connected with the first current collecting disc 3; the second current collecting disc 8 is electrically connected with the negative end of the winding core 7; the cover plate 9 seals the opening 101.
The preparation method of the full-lug cylindrical power battery comprises the following steps:
s1, firstly, mounting a pole 2 on a battery shell 1;
s2, winding the pole piece to form a winding core 7, flattening the pole ear of the winding core 7, and welding the first current collecting disc 3 and the second current collecting disc 8 at two ends of the winding core 7 oppositely;
s3, welding the first current collecting disc 3, the second current collecting disc 8 and the winding core 7 into a whole, and then loading the whole into the battery shell 1 through the opening 101, wherein the first current collecting disc 3 firstly enters the battery shell 1 until the riveting part 32 is inserted into the liquid injection hole 201 of the pole 2;
s4, applying pressure to the second current collecting disc 8 to enable the first current collecting disc 3 to tightly abut against the pole 2, and then, riveting the riveting part 32 to be fixed on the annular flange part 22 in a turned-over manner;
s5, welding the cover plate 9 and the battery shell 1 to seal the opening 101, wherein the cover plate 9 is electrically connected with the second current collecting disc 8;
s6, injecting electrolyte into the full-lug cylindrical power battery through the electrolyte injection hole 201 of the pole 2;
and S7, sealing the liquid injection hole 201.
The first current collecting disc 3 in the technical scheme is used as a positive current collecting disc of a battery, and the pole 2 is used as a positive pole of the battery.
The second embodiment:
the difference between the technical scheme and the first embodiment is as follows: the first current collecting disc 3 in the technical scheme is used as a negative current collecting disc of the battery, and the pole 2 is used as a negative pole of the battery.
Example three:
the technical scheme is different from the embodiment in that: the electric connecting pieces of the anode and the cathode of the battery all adopt the first current collecting disc 3 and the pole 2.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A full-lug cylindrical power battery is characterized by comprising a battery shell (1), a pole (2) and a first current collecting disc (3), wherein,
the battery case (1) is provided with an opening (101);
the pole (2) comprises a pole body (21) and an annular flange part (22);
the pole body (21) penetrates through one end, far away from the opening (101), of the battery shell (1), the pole body (21) is electrically insulated from the battery shell (1), a liquid injection hole (201) is formed in the pole body (21), and the annular flange part (22) is formed by extending part of the pole body (21) into the liquid injection hole (201);
the first current collecting disc (3) comprises a first current collecting disc body (31) and a riveting part (32), the first current collecting disc body (31) is positioned in the battery shell (1) and abuts against the pole (2), the part of the first current collecting disc body (31) extends into the liquid injection hole (201) to form the riveting part (32), and the riveting part (32) is riveted on the annular flange part (22) in a turned mode; the first collecting plate (3) is provided with a through hole (301) penetrating through the first collecting plate body (31) and the riveting part (32).
2. The full-tab cylindrical power cell of claim 1, wherein: and a plurality of grooves (302) are formed in the end, inserted into the liquid injection hole (201), of the riveting part (32) in an annular array manner.
3. The full-tab cylindrical power cell of claim 1, wherein: and an inclined chamfer (202) is arranged on one surface of the annular flange part (22) facing the first collecting disc (3).
4. The full-tab cylindrical power cell of claim 1, wherein: the sealing rubber plug (4) comprises a first sealing part (41) and a second sealing part (42), wherein,
the first sealing part (41) is positioned in the liquid injection hole (201) and abuts against the riveting part (32);
the first sealing portion (41) extends into the through hole (301) to form the second sealing portion (42).
5. The full-tab cylindrical power cell of claim 4, wherein: the first sealing portion (41) is provided with a containing groove (401) corresponding to the rivet turning portion of the rivet connection portion (32), and the inner surface of the containing groove (401) abuts against the rivet connection portion (32).
6. The full-tab cylindrical power cell of claim 4, wherein: the aluminum sheet (5) abuts against one end, far away from the riveting part (32), of the sealing rubber plug (4), and the aluminum sheet (5) is fixedly welded with the pole (2).
7. The full-tab cylindrical power cell of claim 6, wherein: the middle part of the aluminum sheet (5) is provided with a plurality of stress grooves (501).
8. The full-tab cylindrical power cell of claim 1, wherein: the battery pack is characterized by further comprising a sealing element (6), wherein the sealing element (6) is arranged between the battery shell (1) and the pole (2) and used for electrically insulating the battery shell (1) and the pole (2).
9. The full-tab cylindrical power cell of claim 1, wherein: also comprises a roll core (7), a second collecting disc (8) and a cover plate (9), wherein,
the winding core (7) is positioned in the battery shell (1), and one end of the winding core (7) is electrically connected with the first current collecting disc (3);
the second current collecting disc (8) is electrically connected with the negative end of the winding core (7);
the cover plate (9) seals the opening (101).
10. A method of making the full-tab cylindrical power cell of claim 9, comprising the steps of:
s1, firstly, mounting the pole (2) on the battery shell (1);
s2, winding a pole piece to form the winding core (7), flattening the pole ear of the winding core (7), and welding the first current collecting disc (3) and the second current collecting disc (8) at two ends of the winding core (7) oppositely;
s3, the first current collecting disc (3), the second current collecting disc (8) and the winding core (7) are welded into a whole and then are installed into the battery shell (1) through the opening (101), the first current collecting disc (3) firstly enters the battery shell (1) until the riveting part (32) is inserted into the liquid injection hole (201) of the pole (2);
s4, applying pressure to the second current collecting disc (8) to enable the first current collecting disc (3) to tightly abut against the pole (2), and then turning and riveting the riveting part (32) to be fixed on the annular flange part (22);
s5, welding the cover plate (9) and the battery shell (1) to seal the opening (101), wherein the cover plate (9) is electrically connected with the second current collecting plate (8);
s6, injecting electrolyte into the cylindrical power battery with the full lug through the liquid injection hole (201) of the pole (2);
and S7, sealing the liquid injection hole (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211379340.0A CN115911773A (en) | 2022-11-04 | 2022-11-04 | Full-lug cylindrical power battery and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211379340.0A CN115911773A (en) | 2022-11-04 | 2022-11-04 | Full-lug cylindrical power battery and preparation method thereof |
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| CN115911773A true CN115911773A (en) | 2023-04-04 |
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| CN202211379340.0A Pending CN115911773A (en) | 2022-11-04 | 2022-11-04 | Full-lug cylindrical power battery and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116632370A (en) * | 2023-07-24 | 2023-08-22 | 新乡市弘力电源科技有限公司 | Full-lug cylindrical lithium ion battery assembling and processing device |
| CN117393934A (en) * | 2023-10-24 | 2024-01-12 | 东莞市创明电池技术有限公司 | Cylindrical battery and method for assembling the same |
-
2022
- 2022-11-04 CN CN202211379340.0A patent/CN115911773A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116632370A (en) * | 2023-07-24 | 2023-08-22 | 新乡市弘力电源科技有限公司 | Full-lug cylindrical lithium ion battery assembling and processing device |
| CN116632370B (en) * | 2023-07-24 | 2023-10-03 | 新乡市弘力电源科技有限公司 | Full-lug cylindrical lithium ion battery assembling and processing device |
| CN117393934A (en) * | 2023-10-24 | 2024-01-12 | 东莞市创明电池技术有限公司 | Cylindrical battery and method for assembling the same |
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