CN115224340A - Assembly process of cylindrical battery structure - Google Patents
Assembly process of cylindrical battery structure Download PDFInfo
- Publication number
- CN115224340A CN115224340A CN202211064065.3A CN202211064065A CN115224340A CN 115224340 A CN115224340 A CN 115224340A CN 202211064065 A CN202211064065 A CN 202211064065A CN 115224340 A CN115224340 A CN 115224340A
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- China
- Prior art keywords
- current collecting
- collecting disc
- battery
- aluminum
- extending end
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses an assembly process of a cylindrical battery structure, which comprises an electrode lug foil material of an anode plate of an electric core, an electrode lug foil material of a cathode plate, a combined current collecting disc, a retainer, a copper current collecting disc, an aluminum current collecting disc, an extending end of the copper current collecting disc, an extending end of the aluminum current collecting disc, a combined end cover, an aluminum pole, an insulating sheet, a nickel-plated steel end cover and a battery shell, wherein the combined current collecting disc comprises the retainer, the copper current collecting disc, the aluminum current collecting disc, the extending end of the copper current collecting disc and the extending end of the aluminum current collecting disc, the retainer is made of an insulating heat-resistant polymer material, and the extending end of the copper current collecting disc and the extending end of the aluminum current collecting disc are both welding ends. The assembly process of the cylindrical battery structure fully exerts the advantages of the single-side opening and the two-side opening of the battery shell by adjusting the structural design and the assembly mode of the battery, and avoids the defects and risks of the structure, so that the final battery material and the processing cost are reduced, and the reliability of the processing quality is improved.
Description
Technical Field
The invention relates to the technical field of battery assembly, in particular to an assembly process of a cylindrical battery structure.
Background
The positive and negative terminals of the cylindrical lithium ion battery are generally positioned at two ends of the battery, and the positive and negative terminals of the battery cell in the battery are respectively connected to two ends of the battery shell to realize circuit communication when the interior of the battery is assembled and processed. Existing designs generally fall into two broad categories: (1) the battery shell is provided with a single-side opening; (2) the battery case is double-sided open. In both schemes, a proper process is used for connecting the positive and negative terminals of the battery core with the battery shell part, so that the circuit circulation is ensured. Both solutions have advantages and disadvantages and are widely applicable to different types of battery cases.
Scheme one (as shown in fig. 4), battery case single-side opening scheme: the battery shell generally adopts an integral forming process, the battery core part is firstly matched and arranged in the battery shell, and then a proper welding process, such as resistance welding, ultrasonic welding or laser penetration welding, is adopted to connect the bottom terminal of the battery core inner joint shell with the battery shell, the scheme has simple processing process and low cost of the battery shell;
in the above-mentioned process, if resistance welding and ultrasonic welding are used, welding is performed from the inside of the battery by means of the center hole of the battery core, and the welding area is limited by the size of the center hole, so that it is difficult to ensure the energy density of the battery (the center hole is reduced), and improve the over-current capability of the battery (increase the welding area), while laser penetration welding may cause perforation of the case, which results in scrapping of the battery, and the reliability of the above-mentioned welding method is relatively low.
Scheme two (as shown in fig. 5), battery case double-side opening scheme: the battery shell is in a straight cylinder shape, the battery core can be assembled from any side in a matching way, and then the leading-out end of the battery core is welded on the end cover by adopting ultrasonic welding or laser welding to realize circuit communication, so that the welding reliability of the scheme is high;
however, the above-mentioned process technology is adopted, the cost of the battery shell 2 and the end cover 3 is high, and the comprehensive processing cost is high because many processing steps are required.
Aiming at the problems, the innovative design is carried out on the basis of the connecting structure of the current collecting disc of the original cylindrical battery connecting sheet.
Disclosure of Invention
The invention aims to provide an assembly process of a cylindrical battery structure, which aims to solve the problems that the existing welding mode has relatively low reliability, needs more processing steps and has high comprehensive processing cost in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an assembling process of a cylindrical battery structure comprises a positive plate tab foil material of a battery core, a negative plate tab foil material, a combined current collecting disc, a retainer, a copper current collecting disc, an aluminum current collecting disc, a copper current collecting disc extending end, an aluminum current collecting disc extending end, a combined end cover, an aluminum pole, an insulating sheet, a nickel-plated steel end cover and a battery shell
Firstly, carrying out laser die cutting on a cylindrical battery pole piece, wherein the size of each part of the die cutting is calculated according to the actual thickness of the battery pole piece, a diaphragm and the like and the effect required to be presented after actual winding;
winding the tab foil of the positive plate of the battery cell and the tab foil of the negative plate on the same side, wherein the tab foil of the positive plate is in the left semicircle of the battery after winding, the tab foil of the negative plate is in the right semicircle of the battery, the tabs are mutually separated and do not contact in a superposed manner;
thirdly, end face welding is carried out by using the combined current collecting disc, and welding is carried out on the tab foil of the positive plate and the tab foil of the negative plate of the battery cell and the corresponding positions of the combined current collecting disc respectively by using laser welding;
fourthly, welding the extending end of the copper current collecting disc and the extending end of the aluminum current collecting disc with the combined end cover, after the welding is finished, folding the extending end of the copper current collecting disc and the extending end of the aluminum current collecting disc, combining and assembling the combined end cover and the battery case, and sealing the combined end cover and the battery case joint by laser welding;
and fifthly, after the assembly is finished, reserving a liquid injection hole on the combined end cover for liquid injection processing.
Preferably, the combined type current collecting disc comprises a retainer, a copper current collecting disc, an aluminum current collecting disc, an extending end of the copper current collecting disc and an extending end of the aluminum current collecting disc, the retainer is made of insulating heat-resistant polymer materials, and the extending end of the copper current collecting disc and the extending end of the aluminum current collecting disc are both welding ends.
Preferably, the middle part of the retainer is fixed with a copper current collecting disc and an aluminum current collecting disc, and the shape and the size of the copper current collecting disc and the size of the aluminum current collecting disc are completely the same.
Preferably, the combination end cover includes aluminium system utmost point post, insulating piece and nickel-plated steel end cover, and wherein the insulating piece uses insulating heat-resisting polymer material, and the below of aluminium system utmost point post is connected with the insulating piece, and the nickel-plated steel end cover is installed to the below of insulating piece.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, through adjusting the structural design and the assembly mode of the battery, the advantages of the single-side opening and the two-side opening of the battery shell are fully exerted, and the defects and risks of the structure are avoided, so that the final battery material and the processing cost are reduced, and the reliability of the processing quality is improved;
1. the integrally formed steel shell is used for production, so that the cost of the battery shell is low;
2. welding processing is carried out on the outer side, the welding modes are selected in a large number, the design size of a battery cell is not limited, and meanwhile dust and welding slag generated by welding can be prevented from entering the battery and causing pollution through effective protective measures;
3. the positive and negative electrode current collecting plates are arranged on one side, so that the investment of welding equipment can be reduced, the processing procedures are reduced, and the welding reliability is further improved.
Drawings
FIG. 1 is a schematic view of a cylindrical battery assembly of the present invention;
FIG. 2 is a schematic view of the die cutting of the present invention;
FIG. 3 is a schematic winding view of the present invention;
FIG. 4 is a schematic view of the prior art of the present invention;
FIG. 5 is a schematic diagram of the second prior art of the present invention.
In the figure: 1. a tab foil of the positive plate of the battery cell; 2. a tab foil of the negative plate; 3. a combined collecting tray; 301. a holder; 302. a copper current collecting plate; 303. an aluminum current collecting disc; 304. a copper current collecting plate extension end; 305. an extension end of the aluminum current collecting disc; 4. a combined end cover; 401. aluminum pole; 402. an insulating sheet; 403. nickel-plated steel end covers; 5. a battery case.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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 making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: an assembly process of a cylindrical battery structure comprises a battery core positive plate tab foil 1, a negative plate tab foil 2, a combined current collecting disc 3, a retainer 301, a copper current collecting disc 302, an aluminum current collecting disc 303, a copper current collecting disc extending end 304, an aluminum current collecting disc extending end 305, a combined end cover 4, an aluminum pole 401, an insulating sheet 402, a nickel-plated steel end cover 403 and a battery shell 5, and comprises the following steps of
Firstly, carrying out laser die cutting on a cylindrical battery pole piece, and carrying out die cutting on sizes L1, L2, d1 and d2 of each part \8230, wherein the size \8230iscalculated according to actual thicknesses of the battery pole piece, a diaphragm and the like and effects required to be presented after actual winding;
secondly, winding the tab foil 1 of the positive plate of the battery cell and the tab foil 2 of the negative plate at the same side, wherein the tab of the positive plate is positioned in the left semicircle of the battery after winding, the tab of the negative plate is positioned in the right semicircle of the battery, and the tabs are mutually separated and do not contact in a superposed manner;
thirdly, end face welding is carried out by using the combined current collecting disc 3, and the battery cell positive plate tab foil 1 and the battery cell negative plate tab foil 2 are respectively welded with the corresponding positions of the combined current collecting disc 3 by laser welding;
fourthly, welding the copper current collecting disc extending end 304 and the aluminum current collecting disc extending end 305 with the combined end cover 4, after the welding is finished, folding the copper current collecting disc extending end 304 and the aluminum current collecting disc extending end 305, combining and assembling the combined end cover 4 with the battery case 5, and sealing the joint of the combined end cover 4 and the battery case 5 by using laser welding;
the combined type current collecting disc 3 comprises a retainer 301, a copper current collecting disc 302, an aluminum current collecting disc 303, a copper current collecting disc extending end 304 and an aluminum current collecting disc extending end 305, wherein the retainer 301 is made of an insulating heat-resistant polymer material, and the copper current collecting disc extending end 304 and the aluminum current collecting disc extending end 305 are both welding ends;
a copper current collecting disc 302 and an aluminum current collecting disc 303 are fixed in the middle of the retainer 301, and the copper current collecting disc 302 and the aluminum current collecting disc 303 are completely the same in shape and size;
the combined end cap 4 comprises an aluminum pole 401, an insulating sheet 402 and a nickel-plated steel end cap 403, wherein the insulating sheet 402 is made of an insulating heat-resistant polymer material, the insulating sheet 402 is connected below the aluminum pole 401, and the nickel-plated steel end cap 403 is installed below the insulating sheet 402.
And fifthly, after the assembly is finished, reserving a liquid injection hole on the combined end cover 4 for liquid injection processing.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The assembly process of the cylindrical battery structure comprises a battery core positive plate tab foil (1), a negative plate tab foil (2), a combined current collecting disc (3), a retainer (301), a copper current collecting disc (302), an aluminum current collecting disc (303), a copper current collecting disc extending end (304), an aluminum current collecting disc extending end (305), a combined end cover (4), an aluminum pole (401), an insulating sheet (402), a nickel-plated steel end cover (403) and a battery shell (5), and is characterized by comprising the following steps of
Firstly, carrying out laser die cutting on a cylindrical battery pole piece, wherein the size of each part of the die cutting is calculated according to the actual thickness of the battery pole piece, a diaphragm and the like and the effect required to be presented after actual winding;
secondly, winding the tab foil (1) of the positive plate of the battery cell and the tab foil (2) of the negative plate on the same side, wherein the tab of the positive plate is positioned in the left semicircle of the battery after winding, the tab of the negative plate is positioned in the right semicircle of the battery, the tabs are mutually separated and do not contact with each other;
thirdly, end face welding is carried out by using the combined current collecting disc (3), and welding is carried out on the positions, corresponding to the combined current collecting disc (3), of the positive plate tab foil (1) and the negative plate tab foil (2) of the battery cell respectively by using laser welding;
fourthly, welding the copper current collecting disc extending end (304) and the aluminum current collecting disc extending end (305) with the combined end cover (4), after welding is finished, folding the copper current collecting disc extending end (304) and the aluminum current collecting disc extending end (305), assembling the combined end cover (4) with the battery case (5) in a combined mode, and sealing the joint of the combined end cover (4) and the battery case (5) through laser welding;
and fifthly, after the assembly is finished, reserving a liquid injection hole on the combined end cover (4) for liquid injection processing.
2. An assembly process of a cylindrical battery structure according to claim 1, characterized in that: the combined type current collecting disc (3) comprises a retainer (301), a copper current collecting disc (302), an aluminum current collecting disc (303), a copper current collecting disc extending end (304) and an aluminum current collecting disc extending end (305), the retainer (301) is made of insulating heat-resistant polymer materials, and the copper current collecting disc extending end (304) and the aluminum current collecting disc extending end (305) are both welding ends.
3. An assembly process of a cylindrical battery structure according to claim 1, characterized in that: the middle part of the retainer (301) is fixed with a copper current collecting disc (302) and an aluminum current collecting disc (303), and the shapes and the sizes of the copper current collecting disc (302) and the aluminum current collecting disc (303) are completely the same.
4. An assembly process of a cylindrical battery structure according to claim 1, characterized in that: the combined end cover (4) comprises an aluminum pole column (401), an insulating sheet (402) and a nickel-plated steel end cover (403), wherein the insulating sheet (402) is made of insulating heat-resistant polymer, the insulating sheet (402) is connected to the lower portion of the aluminum pole column (401), and the nickel-plated steel end cover (403) is installed below the insulating sheet (402).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211064065.3A CN115224340A (en) | 2022-09-01 | 2022-09-01 | Assembly process of cylindrical battery structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211064065.3A CN115224340A (en) | 2022-09-01 | 2022-09-01 | Assembly process of cylindrical battery structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115224340A true CN115224340A (en) | 2022-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211064065.3A Withdrawn CN115224340A (en) | 2022-09-01 | 2022-09-01 | Assembly process of cylindrical battery structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN115224340A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116895850A (en) * | 2023-09-08 | 2023-10-17 | 深圳市誉辰智能装备股份有限公司 | Cylindrical battery and manufacturing method thereof |
-
2022
- 2022-09-01 CN CN202211064065.3A patent/CN115224340A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116895850A (en) * | 2023-09-08 | 2023-10-17 | 深圳市誉辰智能装备股份有限公司 | Cylindrical battery and manufacturing method thereof |
| CN116895850B (en) * | 2023-09-08 | 2023-12-29 | 深圳市誉辰智能装备股份有限公司 | Cylindrical battery and manufacturing method thereof |
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| PB01 | Publication | ||
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Application publication date: 20221021 |