CN217768546U - Secondary cylindrical battery, battery module and battery pack - Google Patents
Secondary cylindrical battery, battery module and battery pack Download PDFInfo
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- CN217768546U CN217768546U CN202221842880.3U CN202221842880U CN217768546U CN 217768546 U CN217768546 U CN 217768546U CN 202221842880 U CN202221842880 U CN 202221842880U CN 217768546 U CN217768546 U CN 217768546U
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- positive
- positive pole
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- current collecting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a secondary cylinder type battery, battery module and battery package, secondary cylinder type battery includes: the positive pole, positive pole rush current disc and naked electric core; the lower surface of the positive pole is provided with a positive pole boss extending out; the positive current collecting plate is positioned below the positive pole and is provided with a positive current collecting plate groove matched with the positive pole boss; the bare cell is positioned below the positive current collecting disc, a central tube is arranged in the bare cell, and the positive current collecting disc groove is positioned above the inside of the central tube; the positive pole boss and the positive current collecting plate groove are welded, the welding surface is lower than the upper surface of the naked electric core, and the central tube is sleeved on the periphery of the positive current collecting plate groove. The anode column boss and the anode current collector plate are welded in the groove, the welding surface is lower than the upper surface of the bare cell, and welding slag is prevented from being embedded between the anode current collector plate and the interface of the bare cell and not easy to be discharged, so that the performance of the battery is not influenced; the center tube cover is established in anodal current collector recess periphery, and naked electric core upset opening downward sloping, the welding slag can be derived.
Description
Technical Field
The utility model relates to a battery manufacturing technology field especially relates to a secondary cylinder type battery, battery module and battery package.
Background
A secondary battery is also called a rechargeable battery or a secondary battery, and refers to a battery that can be continuously used by activating an active material by charging after the battery is discharged. During charging and discharging, li + Embedding and de-embedding back and forth between the two electrodes; upon charging, li + The lithium ion battery is released from the positive electrode, and is inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. The development of telecommunication and information markets, particularly the mass use of mobile phones and notebook computers, brings market opportunities to secondary batteries. Among the currently commercialized secondary batteries, the lithium ion battery has the highest specific energy, and the secondary battery can be thinned; in addition, lithium ion batteries have been rapidly growing in developed countries due to their high volumetric and mass specific energies, long service life, good safety, simple and convenient process, being rechargeable and pollution-free, and having many characteristics of current battery industry development.
In the prior art, a secondary cylindrical battery at least comprises a positive pole, a current collecting disc and a battery cell, which are contained in a shell, wherein the positive pole and the current collecting disc are electrically connected by resistance welding, but welding slag is generated during welding and is not easy to discharge from the battery, so that the fixing effect of the internal structure of the battery is poor, and the safety and the consistency of the battery are influenced.
In view of the above, it is desirable to provide a secondary cylindrical battery, a battery module and a battery pack, which can prevent the welding slag generated during the welding of the current collecting plate and the positive electrode post from being easily discharged from the secondary cylindrical battery.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing, an object of the present invention is to provide a secondary cylindrical battery, a battery module and a battery pack, which are used to solve the problem of difficult discharge caused by welding slag generated during welding of a current collecting plate and a positive pole in the secondary cylindrical battery in the prior art.
In order to achieve the above objects and other related objects, the present invention provides a secondary cylindrical battery, including: the positive pole, the positive pole rush current plate and the naked battery cell;
the lower surface of the positive post is provided with a positive post boss extending out;
the positive current collecting plate is positioned below the positive pole, and is provided with a positive current collecting plate groove matched with the positive pole boss;
the bare cell is positioned below the positive current collecting disc, a central tube is arranged in the bare cell, and the positive current collecting disc groove is positioned above the inside of the central tube;
the positive pole boss with the welding of positive current collector dish recess, the face of weld is less than naked electric core upper surface, just the center tube cover is established the periphery of positive current collector dish recess.
Optionally, the size of the positive pole boss is smaller than that of the positive current collecting plate groove, the height of the positive pole boss is the same as the depth of the positive current collecting plate groove, and the positive pole boss enters the positive current collecting plate groove and is welded to the bottom surface of the positive current collecting plate groove.
Optionally, the welding mode of the positive pole boss and the positive pole rush current disc groove is resistance welding, and the positive pole boss is electrically connected with the positive pole rush current disc groove.
Optionally, a through hole is arranged in the middle of the groove of the positive pole rapid flow disc.
Optionally, secondary cylinder type battery still includes plastic, plastic and steel casing under the anodal, plastic on the anodal is located plastic top under the anodal, the steel casing is located plastic reaches under the anodal between the plastic, plastic reaches on the anodal under the anodal plastic be used for with the anodal post reaches the steel casing carries out insulating setting.
Optionally, the shape of the positive post boss is one of a circle, a square, an ellipse, and a racetrack.
Optionally, the shape of the part of the positive pole rush current disc groove matched with the positive pole boss is the same as that of the positive pole boss.
Optionally, the positive pole swash plate groove shape is the same as the cross-sectional shape of the center tube.
The utility model also provides a battery module, battery module above-mentioned arbitrary one secondary cylinder type battery.
The utility model also provides a battery package, the above-mentioned arbitrary one of battery module secondary cylinder type battery.
As described above, the utility model discloses a secondary cylinder type battery has following beneficial effect: the positive pole boss and the positive current collecting plate are welded in the groove, the welding surface is lower than the upper surface of the bare cell, welding slag is prevented from being embedded between the positive current collecting plate and the bare cell interface, and the welding slag is not easy to discharge and affects the performance of the battery; the utility model discloses a center tube is in easily the cover is established in the naked electric core, and the cover is established anodal current collector dish recess periphery, anodal post boss with anodal current collector dish recess hold as for inside the center tube, as long as naked electric core upset opening downward sloping, the welding slag can be followed the center tube is derived, simultaneously, can effectively save the inner space of secondary cylinder type battery.
Drawings
Fig. 1 is a schematic view showing an internal cross-section of a secondary cylindrical battery according to the present invention.
Fig. 2 is an enlarged schematic sectional view of the inner part of the secondary cylindrical battery according to the present invention.
Fig. 3 is a schematic top view of the secondary cylindrical battery of the present invention.
Description of the element reference
10. Positive pole
11. Anode column boss
20. Positive electrode current collecting disc
21. Positive electrode current collecting disc groove
30. Naked electric core
40. Central tube
50. Fixed disk
60. Plastic on anode
70. Steel shell
80. Plastic under positive electrode
90. Negative current collecting plate
100. Bottom cover
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Please refer to fig. 1 to 3. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Example one
As shown in fig. 1 to 3, the present embodiment provides a secondary cylindrical battery including: the positive pole column 10, the positive pole rush current plate 20 and the naked electric core 30;
the lower surface of the positive pole post 10 is provided with an extended positive pole post boss 11, wherein the lower surface of the positive pole post 10 refers to one surface close to the bare cell 30, and the upper surface of the positive pole post 10 is the surface far away from the bare cell 30;
the positive current collecting plate 20 is positioned below the positive pole 10, and the positive current collecting plate 20 is provided with a positive current collecting plate groove 21 matched with the positive pole boss 11;
the bare cell 30 is located below the positive collecting tray 20, a central tube 40 is arranged in the bare cell 30, and the positive collecting tray groove 21 is located above the inside of the central tube 40;
In the embodiment, the positive pole boss 11 is welded with the positive current collecting plate groove 21, and the welding surface is lower than the upper surface of the bare cell 30, so that welding slag is prevented from being embedded between the interface of the positive current collecting plate 20 and the bare cell 30, and is not easy to discharge, and the battery performance is not affected; this embodiment the center tube 40 is in easily the cover is established in naked electric core 30, and the cover is established anodal current collector dish recess 21 periphery, anodal post boss 11 with anodal current collector dish recess 21 hold as for in the center tube 40, as long as naked electric core 30 upset opening downward sloping, welding slag can be followed center tube 40 is derived.
As shown in fig. 1, as an example, the secondary cylindrical battery further includes plastic 60 on the positive electrode, plastic 80 and steel shell 70 under the positive electrode, plastic 60 on the positive electrode is located plastic 80 top under the positive electrode, steel shell 70 is located plastic 60 on the positive electrode reaches between the plastic 80 under the positive electrode, plastic 60 on the positive electrode reaches plastic 80 is used for with positive electrode 10 reaches steel shell 70 carries out the insulating setting under the positive electrode, avoids secondary cylindrical battery short circuit. The secondary cylindrical battery further comprises a fixed disk 50, a negative current collecting disk 90 and a bottom cover 100, wherein the fixed disk 50 is a stainless steel fixed disk; the stainless steel fixing disc is arranged outside the positive electrode 10 and used for fixing the positive electrode 10; the anode current collecting plate 90 and the bottom cover 100 are sequentially located at the bottom of the secondary cylindrical battery.
As shown in fig. 1 to 2, for example, the size of the positive post boss 11 is smaller than the size of the positive current collecting plate recess 21, the height of the positive post boss 11 is the same as the depth of the positive current collecting plate recess 21, and the positive post boss 11 enters the positive current collecting plate recess 21 and is connected to the bottom surface of the positive current collecting plate recess 21.
It should be noted here that the positive post boss 11 and the positive current collecting disc groove 21 can be nested and matched, and the size of the positive post boss 11 and the size of the positive current collecting disc groove 21 can be set according to the overall size of the secondary cylindrical battery, which is not limited herein; the depth of the positive current collecting plate groove 21 and the height of the positive pole boss 11 need to be set according to the capacity of the secondary cylindrical battery, but the depth is not too deep, which can cause the capacity of the secondary cylindrical battery to be reduced.
As an example, the positive pole boss 11 and the positive pole rush current plate groove 21 are welded by resistance welding, and the positive pole boss 11 and the positive pole rush current plate groove 21 are electrically connected.
It should be noted here that the positive post boss 11 with when the contact of anodal torrent dish recess 21 was in welding, the welding slag would remain in the positive current collector dish recess 21 outside usually, and because the face of weld is less than naked electric core 30 upper surface, the welding slag then can enter into survey in the center tube 40, avoid the welding slag to remain in positive current collector dish 20 with between naked electric core 30's the interface, influence the performance of secondary cylinder type battery.
As an example, a through hole is arranged in the middle of the positive pole rush current disc groove 21.
As an example, the size of the through hole disposed in the middle of the positive pole rush current plate groove 21 may be smaller than the size of the bottom surface of the positive pole boss 11, the size of the through hole disposed in the middle of the positive pole rush current plate groove 21 may be equal to the size of the bottom surface of the positive pole boss 11, the size of the through hole disposed in the middle of the positive pole rush current plate groove 21 may be larger than the size of the bottom surface of the positive pole boss 11, and the provision of the through hole saves materials for the positive pole rush current plate 20, does not affect the welding effect between the positive pole rush current plate 20 and the positive pole 10, and can both realize electrical connection therebetween.
As an example, the shape of the positive post boss 11 is one of a circle, a square, an ellipse, and a racetrack; the shape of the part of the positive pole torrent disc groove 21 matched with the positive pole boss 11 is the same as that of the positive pole boss 11; the shape of the positive pole torrent disc groove 21 is the same as the cross-sectional shape of the central tube 40.
It should be noted here that the positive post boss 11 is welded to the positive current collecting plate groove 21, the welding surface is lower than the upper surface of the bare cell 30, and the central tube 40 is sleeved on the periphery of the positive current collecting plate groove 21, so that the shape of the matching portion of the positive post boss 11 and the positive post boss 21 is the same as the shape of the positive post boss 11; as an example, when the shape of the positive pole boss 11 is circular, the shape of the portion where the positive pole rush current disc groove 21 is engaged with the positive pole boss 11 and the shape of the positive pole boss 11 are also circular, and the shape of the cross section of the central tube 40 is also circular. Of course, the shape of the part of the positive pole rapid flow disc groove 21 matched with the positive pole boss 11 and the shape of the cross section of the central tube 40 can be one of a square shape, an oval shape and a racetrack shape, and the shape is consistent with the shape of the positive pole boss 11, so that the shape is not limited here and can be set according to actual needs. In addition, the shape of the positive pole rush current disc groove 21 is the same as the cross section shape of the central tube 40, the positive pole boss 11 is welded with the positive pole current collecting disc groove 21 and is contained in the central tube 40, and the shape of the positive pole current collecting disc groove 21 is the same as the cross section shape of the central tube 40, so that the positive pole current collecting disc groove is convenient to contain and easy to lead out welding slag; the cross-sectional shapes of the positive pole torrent disc groove 21 and the central tube 40 may also be different, but the size of the cross-sectional shape of the central tube 40 needs to be larger than the size of the positive pole torrent disc groove 21, so that the positive pole torrent disc groove 21 can be completely accommodated in the central tube 40.
Example two
The present embodiment provides a battery module including the secondary cylindrical battery according to the first embodiment. The structure of the battery module of this embodiment is well known to those skilled in the art except that the secondary cylindrical battery of the first embodiment is used, and will not be described in detail herein.
EXAMPLE III
This embodiment provides a battery pack including the secondary cylindrical battery according to the first embodiment. The battery pack of this embodiment is well known to those skilled in the art except that the secondary cylindrical battery of the first embodiment is used, and will not be described in detail herein.
To sum up, the utility model provides a secondary cylinder type battery, secondary cylinder type battery includes: the positive pole, positive pole rush current disc and naked electric core; the lower surface of the positive pole is provided with a positive pole boss extending out; the positive current collecting plate is positioned below the positive pole, and is provided with a positive current collecting plate groove matched with the positive pole boss; the bare cell is positioned below the positive current collecting disc, a central tube is arranged in the bare cell, and the positive current collecting disc groove is positioned above the inside of the central tube; the positive post boss with the welding of positive current collector recess, the face of weld is less than naked electric core upper surface, just the center tube cover is established the periphery of positive current collector recess. The positive pole boss and the positive current collecting plate are welded in the groove, the welding surface is lower than the upper surface of the bare cell, welding slag is prevented from being embedded between the positive current collecting plate and the bare cell interface, and the welding slag is not easy to discharge and affects the performance of the battery; the utility model discloses a center tube is in easily the cover is established in the naked electric core, and the cover is established positive current collector recess periphery, the anodal post boss with positive current collector recess hold as for in the center tube, as long naked electric core upset opening downward sloping, the welding slag can be followed the center tube is derived, simultaneously, can effectively save the inner space of secondary cylinder type battery. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A secondary cylindrical battery, characterized in that the secondary cylindrical battery comprises: the positive pole, positive current collecting disc and naked electric core;
the lower surface of the positive post is provided with a positive post boss extending out;
the positive current collecting plate is positioned below the positive pole, and is provided with a positive current collecting plate groove matched with the positive pole boss;
the bare cell is positioned below the positive current collecting plate, a central tube is arranged in the bare cell, and the positive current collecting plate groove is positioned above the inner part of the central tube;
the positive pole boss with the welding of positive current collector dish recess, the face of weld is less than naked electric core upper surface, just the center tube cover is established the periphery of positive current collector dish recess.
2. The secondary cylindrical battery as claimed in claim 1, wherein: the size of the positive pole boss is smaller than that of the positive current collecting plate groove, the height of the positive pole boss is the same as the depth of the positive current collecting plate groove, and the positive pole boss enters the positive current collecting plate groove and is welded with the bottom surface of the positive current collecting plate groove.
3. The secondary cylindrical battery as claimed in claim 1, wherein: the positive pole boss and the positive current collecting plate groove are welded in a resistance welding mode, and the positive pole boss is electrically connected with the positive current collecting plate groove.
4. The secondary cylindrical battery as claimed in claim 1, wherein: and a through hole is formed in the middle of the groove of the positive current collecting plate.
5. The secondary cylindrical battery as claimed in claim 1, wherein: the secondary cylinder type battery still includes plastic, plastic and steel casing under the anodal on the positive pole, plastic is located under the anodal plastic top, the steel casing is located plastic reaches under the anodal on the positive pole between the plastic, plastic reaches on the anodal plastic is used for with under the anodal plastic the anodal post reaches the steel casing sets up that insulates.
6. The secondary cylindrical battery as claimed in claim 1, wherein: the positive pole boss is one of a circular boss, a square boss, an oval boss and a track boss.
7. The secondary cylindrical battery as claimed in claim 6, wherein: the shape of the matching part of the positive pole current collecting disc groove and the positive pole lug boss is the same as that of the positive pole lug boss.
8. The secondary cylindrical battery as claimed in claim 7, wherein: the shape of the groove of the positive collecting tray is the same as the shape of the cross section of the central pipe.
9. A battery module, its characterized in that: the battery module includes the secondary cylindrical battery according to any one of claims 1 to 8.
10. A battery pack, comprising: the battery pack includes the secondary cylindrical battery according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221842880.3U CN217768546U (en) | 2022-07-18 | 2022-07-18 | Secondary cylindrical battery, battery module and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221842880.3U CN217768546U (en) | 2022-07-18 | 2022-07-18 | Secondary cylindrical battery, battery module and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217768546U true CN217768546U (en) | 2022-11-08 |
Family
ID=83873502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221842880.3U Active CN217768546U (en) | 2022-07-18 | 2022-07-18 | Secondary cylindrical battery, battery module and battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217768546U (en) |
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2022
- 2022-07-18 CN CN202221842880.3U patent/CN217768546U/en active Active
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