CN114824591B - Central needle and cylindrical battery cell - Google Patents
Central needle and cylindrical battery cell Download PDFInfo
- Publication number
- CN114824591B CN114824591B CN202210515382.6A CN202210515382A CN114824591B CN 114824591 B CN114824591 B CN 114824591B CN 202210515382 A CN202210515382 A CN 202210515382A CN 114824591 B CN114824591 B CN 114824591B
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- China
- Prior art keywords
- welding
- central
- needle body
- needle
- center
- Prior art date
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- 238000003466 welding Methods 0.000 claims abstract description 87
- 239000003792 electrolyte Substances 0.000 claims abstract description 29
- 239000004020 conductor Substances 0.000 claims abstract description 5
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000004804 winding Methods 0.000 abstract description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052744 lithium Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Filling, Topping-Up Batteries (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to the technical field of cylindrical lithium batteries, and particularly discloses a central needle and a cylindrical battery cell, wherein the central needle comprises a central needle body and a welding head fixed at one end of the central body, the outer peripheral surface of the central needle body is also provided with a drainage structure, the drainage structure comprises a plurality of electrolyte drainage holes, the electrolyte drainage holes are communicated with through holes, the central needle body can be inserted into the central holes of the cylindrical battery cell to strengthen the central holes, collapse deformation of a winding core is avoided, the welding head is used for welding with a transfer piece, the central needle body and the welding head are both made of conductive materials, and when the welding head is welded, the central needle body can be connected with a welding circuit through the central needle body, so that the central needle body also plays the role of the traditional resistance welding needle, the diversification of the functions of the central needle is realized, the production process is simplified, and meanwhile, the resistance welding needle is not required to be equipped, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of cylindrical lithium batteries, in particular to a center pin and a cylindrical battery cell.
Background
The cylindrical battery core is provided with a winding structure, a central hole is reserved in the cylindrical battery core, in the battery core circulation process, the strength of the central hole is small, the inner pole piece is collapsed under severe working conditions, the central hole is reinforced by preparing a central needle, and the cylindrical battery core needle structure is only used for reinforcing the central hole and has a single function as in the earlier-stage patent with the application number of CN 201520890504.5.
In addition, in the processing process of the cylindrical battery cell, the bottom of the cylindrical battery cell is usually welded by adopting a resistance welding process through a resistance welding needle. Therefore, in the prior art, the process of machining the center hole and welding the bottom of the cylindrical battery cell are two relatively independent procedures, and a special resistance welding needle needs to be prepared, so that the production process is complex, and the production efficiency is low.
Disclosure of Invention
The invention aims at: the utility model provides a center pin and cylinder electric core to consolidate the centre bore of cylinder electric core through the center pin and weld the bottom of cylinder electric core and divide into two processes and operate, and need prepare dedicated resistance welding needle among the solution prior art, lead to production technology complicacy, problem that production efficiency is low.
In one aspect, the invention provides a center needle, which comprises a center needle body, wherein the center needle body is provided with a through hole, the outer peripheral surface of the center needle body is also provided with a drainage structure, the drainage structure comprises a plurality of electrolyte drainage holes, the electrolyte drainage holes are communicated with the through hole, the center needle also comprises a welding head fixedly arranged at one end of the center needle body, the welding head is used for welding with an adapter, and the center needle body and the welding head are both made of conductive materials.
As the preferable technical scheme of the center needle, the number of the drainage structures is multiple, the drainage structures are arranged at intervals along the circumferential direction of the center needle, and the electrolyte drainage holes in the drainage structures are arranged at intervals along the axial direction of the center needle body.
As the preferable technical proposal of the central needle, the interval between two adjacent electrolyte drainage holes is 5-10 mm; the interval angle between two adjacent drainage structures is 0-180 degrees.
As the preferable technical proposal of the central needle, the aperture of the electrolyte drainage hole is 1-3 mm.
As a preferable technical scheme of the central needle, the central needle comprises a plurality of welding heads which are arranged at intervals along the circumferential direction of the central needle body.
As a preferred embodiment of the center pin, the welding heads have a welding area, and the number of the welding heads is inversely proportional to the welding area of the welding heads.
As a preferable technical scheme of the central needle, the product of the number of the welding heads and the welding area of the welding heads is S,1.5mm 2 ≤S≤15mm 2 。
As a preferable technical scheme of the central needle, the welding head and the central needle body are integrally formed, and the welding head and the central needle body are made of the same conductive metal material;
or the welding head and the central needle body are arranged separately.
As a preferable technical scheme of the central needle, the ratio of the length of the central needle body to the length of the welding head is between 5 and 6.
In another aspect, the present invention provides a cylindrical cell comprising a central pin according to any of the above aspects.
The beneficial effects of the invention are as follows:
the invention provides a central needle and a cylindrical battery cell, wherein the central needle comprises a central needle body and a welding head which are integrally arranged, the central needle body and the welding head are made of conductive materials, the central needle body can be inserted into a central hole of the cylindrical battery cell to reinforce the central hole, collapse deformation of a winding core is avoided, and when the welding head is welded to a switching piece, a welding circuit can be accessed through the central needle body, so that the central needle body also plays the role of a traditional resistance welding needle, the diversification of the functions of the central needle is realized, the production process is simplified, meanwhile, the resistance welding needle can be not required to be equipped, and the production cost is reduced.
Drawings
FIG. 1 is an axial side view of a center needle in an embodiment of the invention;
FIG. 2 is a side view of a center needle in an embodiment of the invention;
fig. 3 is a schematic structural view of a center needle in an embodiment of the present invention.
In the figure:
1. a central needle body; 11. a through hole; 12. an electrolyte drainage hole;
2. welding head;
3. and a switching piece.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the prior art, the central hole of the cylindrical battery cell is reinforced through the central needle and the bottom of the cylindrical battery cell is welded and is divided into two working procedures for operation, and a special resistance welding needle is required to be prepared, so that the problems of complex production process and low production efficiency are caused.
In this regard, this embodiment provides a center pin, and this center pin can consolidate the centre bore of cylinder electricity core simultaneously, still can be used to the welding simultaneously to reach the purpose that simplifies production process, reduction in production cost, improvement production efficiency.
Specifically, fig. 1 is an axial side view of a center needle in the present embodiment; FIG. 2 is a side view of the center needle in this embodiment; fig. 3 is a schematic structural view of the center needle in this embodiment. As shown in fig. 1 to 3, the center needle includes a center needle body 1 and a welding head 2. Wherein, center needle body 1 has through-hole 11, and the outer peripheral face of center needle body 1 is provided with drainage structure, and drainage structure includes a plurality of electrolyte drainage holes 12, and electrolyte drainage hole 12 and through-hole 11 intercommunication. The central needle body 1 is used for being inserted into a central hole of the cylindrical battery cell to strengthen the central hole, so that the collapse deformation of the winding core is avoided, and the through hole 11 and the electrolyte drainage hole 12 are used for circulating electrolyte. The welding head 2 is used for welding the adapter plate 3.
In this embodiment, the center pin body 1 and the welding head 2 are made of conductive materials, so that when the welding head 2 is welded to the adapter plate 3, the welding circuit can be accessed through the center pin body 1, and when in welding operation, the welding head 2 and the adapter plate 3 are welded together by adjusting the welding current of each time, so that the center pin body 1 also plays the role of a traditional resistance welding pin, diversification of the function of the center pin is realized, the production process is simplified, meanwhile, the resistance welding pin is not required to be equipped, the production cost is reduced, and the reinforcing effect on the center hole can be further enhanced because the center pin body 1, the welding head 2 and the adapter plate 3 are connected into a whole.
Alternatively, the aperture of the electrolyte drainage hole 12 is 1 to 3mm. This arrangement can ensure the strength of the electrolyte drainage hole 12. The aperture of the electrolyte drain hole 12 may be set to 1mm, 1.5mm, 2mm, 2.5mm, or 3mm, for example. Preferably, as the outer diameter of the center needle body 1 increases, the aperture of the electrolyte drainage hole 12 tends to increase, but does not exceed 3mm.
Optionally, the number of the drainage structures is multiple, the multiple drainage structures are arranged at intervals along the circumferential direction of the central needle, and the multiple electrolyte drainage holes 12 in the drainage structures are arranged at intervals along the axial direction of the central needle body 1. So set up, be convenient for guarantee the even circulation of electrolyte. In particular, in the present embodiment, a scheme in which the number of drainage structures is two is exemplarily given. Preferably, the plurality of drainage structures are uniformly distributed along the circumferential direction of the central needle body 1, and the plurality of electrolyte drainage holes 12 in the drainage structures are uniformly distributed along the axial direction of the central needle body 1.
Wherein, the interval between two adjacent electrolyte drainage holes 12 is 5-10 mm, such as 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm or 10mm; the interval angle between two adjacent drainage structures is 0-180 degrees, such as 10 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees, 160 degrees, 170 degrees or 180 degrees. Taking the central needle body 1 with the diameter of 8mm and the length of 80mm as an example, the interval between two electrolyte drainage holes 12 axially adjacent to the central needle body 1 is 10mm, the included angle between two electrolyte drainage holes 12 adjacent to the central needle body 1 in the circumferential direction is 90 degrees, so that the number of drainage structures is at most 4, the number of electrolyte drainage holes 12 in each drainage structure is not more than 7, and the total number of electrolyte drainage holes 12 is not more than 28.
In this embodiment, the center needle includes a plurality of welding heads 2, and the plurality of welding heads 2 are arranged at intervals along the circumferential direction of the center needle body 1. Preferably, the plurality of welding heads 2 are uniformly distributed along the circumferential direction of the central needle body 1, so that the connection strength between the switching piece 3 and the welding heads 2 can be ensured to be uniform in all directions.
Alternatively, the number of welding heads 2 is inversely proportional to the welding area of the welding heads 2. Specifically, the product of the number of welding heads 2 and the welding area of the welding heads 2 is S,1.5mm 2 ≤S≤15mm 2 . This ensures that the welding areas of the plurality of welding heads 2 and the adapter plate 3 are consistent. For example, when s=10mm 2 When the number of the welding heads 2 is 4, the welding heads 2 are of the size of2.5mm 2 。
Alternatively, the welding head 2 is integrally formed with the central needle body 1, and the welding head 2 and the central needle body 1 are made of the same conductive metal material. Wherein the conductive metal material can be copper or aluminum.
As an alternative thereto, the welding head 2 is provided separately from the central needle body 1. At this time, the materials of the welding head 2 and the central needle body 1 may be the same or different, and when the materials are different, for example, the welding head 2 is made of copper material, and the central needle body 1 is made of aluminum material.
Optionally, the ratio of the length of the central needle body 1 to the length of the welding head 2 is between 5 and 6, such as in particular 5, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9 or 6. The arrangement can ensure that the overall strength of the central needle body 1 and the welding head 2 is optimal.
The embodiment also provides a cylindrical battery cell, which comprises the center pin in the scheme.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (8)
1. The utility model provides a center needle, includes center needle body (1), center needle body (1) has through-hole (11), the outer peripheral face of center needle body (1) still is equipped with drainage structure, drainage structure includes a plurality of electrolyte drainage holes (12), electrolyte drainage holes (12) with through-hole (11) intercommunication, its characterized in that, center needle still includes fixed set up in bonding tool (2) of center needle body (1) one end, bonding tool (2) are used for with changeover piece (3) welding, center needle body (1) and bonding tool (2) all adopt electrically conductive material to make;
the number of the drainage structures is multiple, the drainage structures are arranged at intervals along the circumferential direction of the central needle, and the electrolyte drainage holes (12) in the drainage structures are arranged at intervals along the axial direction of the central needle body (1);
the central needle comprises a plurality of welding heads (2), and the welding heads (2) are arranged at intervals along the circumferential direction of the central needle body (1).
2. The center pin according to claim 1, characterized in that a distance between two adjacent electrolyte drainage holes (12) is 5-10 mm; the interval angle between two adjacent drainage structures is 0-180 degrees.
3. The center needle according to claim 1, characterized in that the aperture of the electrolyte drainage hole (12) is 1-3 mm.
4. The centre needle according to claim 1, characterized in that the welding heads (2) have a welding area, the number of welding heads (2) being inversely proportional to the welding area of the welding heads (2).
5. The centre needle according to claim 4, characterized in that the product of the number of welding heads (2) and the welding area of the welding heads (2) is S,1.5mm 2 ≤S≤15mm 2 。
6. The central needle according to claim 1, characterized in that the welding head (2) is integrally formed with the central needle body (1), and in that the welding head (2) and the central needle body (1) are made of the same conductive metallic material;
or, the welding head (2) is arranged separately from the central needle body (1).
7. The centre needle according to claim 1, characterized in that the ratio of the length of the centre needle body (1) to the length of the welding head (2) is between 5 and 6.
8. A cylindrical cell comprising the center pin of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210515382.6A CN114824591B (en) | 2022-05-11 | 2022-05-11 | Central needle and cylindrical battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210515382.6A CN114824591B (en) | 2022-05-11 | 2022-05-11 | Central needle and cylindrical battery cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114824591A CN114824591A (en) | 2022-07-29 |
| CN114824591B true CN114824591B (en) | 2024-04-09 |
Family
ID=82512679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210515382.6A Active CN114824591B (en) | 2022-05-11 | 2022-05-11 | Central needle and cylindrical battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114824591B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191109944A (en) * | 1910-04-27 | 1912-02-08 | Heinrich Paul Rudolf Poerscke | Improvements in Secondary Galvanic Batteries. |
| JP2008034213A (en) * | 2006-07-28 | 2008-02-14 | Hissho Go | Conductive coupling structure of conductive handle for lithium-ion secondary battery |
| CN105514499A (en) * | 2015-12-05 | 2016-04-20 | 江苏天鹏电源有限公司 | Hole guide-in pin for processing of center hole of jelly roll of cylindrical lithium ion battery |
| CN205231199U (en) * | 2015-11-09 | 2016-05-11 | 杭州伯坦科技工程有限公司 | Cylinder battery center needle structure |
| CN209344244U (en) * | 2018-10-15 | 2019-09-03 | 横店集团东磁股份有限公司 | A kind of lithium battery insulation spacer and lithium battery |
| CN110931886A (en) * | 2019-11-13 | 2020-03-27 | 河南鑫泉能源科技有限公司 | Cylindrical battery bottom welding pin inserting device and bottom welding pin inserting method |
| CN211759415U (en) * | 2019-11-25 | 2020-10-27 | 江门市锦业华科技有限公司 | Welding pin for welding bottom of battery with new structure |
| CN213366665U (en) * | 2020-09-30 | 2021-06-04 | 河南海宏科技有限公司 | Novel heat radiation structure of cylinder lithium cell |
| CN214378525U (en) * | 2021-02-01 | 2021-10-08 | 成都市银隆新能源有限公司 | Central tube structure and battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201915294D0 (en) * | 2019-10-22 | 2019-12-04 | Ceres Ip Co Ltd | Alignment apparatus and methods of alignment |
-
2022
- 2022-05-11 CN CN202210515382.6A patent/CN114824591B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191109944A (en) * | 1910-04-27 | 1912-02-08 | Heinrich Paul Rudolf Poerscke | Improvements in Secondary Galvanic Batteries. |
| JP2008034213A (en) * | 2006-07-28 | 2008-02-14 | Hissho Go | Conductive coupling structure of conductive handle for lithium-ion secondary battery |
| CN205231199U (en) * | 2015-11-09 | 2016-05-11 | 杭州伯坦科技工程有限公司 | Cylinder battery center needle structure |
| CN105514499A (en) * | 2015-12-05 | 2016-04-20 | 江苏天鹏电源有限公司 | Hole guide-in pin for processing of center hole of jelly roll of cylindrical lithium ion battery |
| CN209344244U (en) * | 2018-10-15 | 2019-09-03 | 横店集团东磁股份有限公司 | A kind of lithium battery insulation spacer and lithium battery |
| CN110931886A (en) * | 2019-11-13 | 2020-03-27 | 河南鑫泉能源科技有限公司 | Cylindrical battery bottom welding pin inserting device and bottom welding pin inserting method |
| CN211759415U (en) * | 2019-11-25 | 2020-10-27 | 江门市锦业华科技有限公司 | Welding pin for welding bottom of battery with new structure |
| CN213366665U (en) * | 2020-09-30 | 2021-06-04 | 河南海宏科技有限公司 | Novel heat radiation structure of cylinder lithium cell |
| CN214378525U (en) * | 2021-02-01 | 2021-10-08 | 成都市银隆新能源有限公司 | Central tube structure and battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114824591A (en) | 2022-07-29 |
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