CN114725628A - Battery assembly and battery manufacturing method - Google Patents
Battery assembly and battery manufacturing method Download PDFInfo
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- CN114725628A CN114725628A CN202210427204.8A CN202210427204A CN114725628A CN 114725628 A CN114725628 A CN 114725628A CN 202210427204 A CN202210427204 A CN 202210427204A CN 114725628 A CN114725628 A CN 114725628A
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- inner groove
- circumferential inner
- cylindrical battery
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 238000007789 sealing Methods 0.000 claims description 55
- 238000005452 bending Methods 0.000 claims description 38
- 238000005096 rolling process Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 7
- 238000010923 batch production Methods 0.000 abstract description 3
- 230000003685 thermal hair damage Effects 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
- H01M10/0422—Cells or battery with cylindrical casing
-
- 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
- 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
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/167—Lids or covers characterised by the methods of assembling casings with lids by crimping
-
- 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
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- 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
- H01M50/531—Electrode connections inside a battery casing
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
-
- 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
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention belongs to the technical field of cylindrical batteries and discloses a battery assembly and a battery manufacturing method. Wherein, battery pack includes casing, adaptor piece and apron. The shell is hollow, one end of the shell is open, the cylindrical battery cell is arranged in the shell, and the shell is circumferentially inwards concave to form a circumferential inner groove; the adapter sheet is arranged on the cylindrical battery cell, and one axial end of the adapter sheet is pressed between the circumferential inner groove and the cylindrical battery cell and is abutted against the circumferential inner groove and the cylindrical battery cell; the cover plate is abutted to the other axial end of the adapter plate, and the opening end of the shell is inwards bent to position the cover plate. Fixed connection is realized between the adapter plate and the shell through a mechanical matching connection mode, the processing difficulty and the cost are low, and batch production and manufacturing are facilitated. The battery manufacturing method is used for manufacturing the battery assembly, connection between the adapter plate and the shell can be realized without intervention of laser welding, thermal damage to parts is avoided, production difficulty is reduced, and production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of cylindrical batteries, in particular to a battery assembly and a battery manufacturing method.
Background
At present, a large cylindrical lithium ion battery mainly adopts a full-lug design scheme, and a cylindrical battery adapter sheet is connected with a battery shell in a laser welding mode so as to connect the adapter sheet with the shell, thereby achieving the purpose of electrification of the shell. However, the connection mode of laser welding is high in processing difficulty and high in accuracy, so that the risk of welding and failure in detection exists, and the shell plating layer of the cylindrical battery shell can be knocked off by laser welding, so that the shell is easy to rust and the like.
Disclosure of Invention
The invention aims to provide a battery pack and a battery manufacturing method, which can realize connection and electrification of an adapter sheet, a shell and a cover plate in a mechanical matching mode.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, a battery assembly is provided, including:
the battery comprises a shell, a battery body and a battery cover, wherein the shell is hollow, one end of the shell is opened, a cylindrical battery core is installed in the shell, and a circumferential inner groove is formed in the shell in a circumferential concave manner;
the adapter sheet is mounted on the cylindrical battery cell, and one axial end of the adapter sheet is press-mounted between the circumferential inner groove and the cylindrical battery cell and is abutted against the circumferential inner groove and the cylindrical battery cell;
the cover plate is abutted to the other axial end of the adapter plate, and the opening end of the shell is bent inwards to be positioned on the cover plate.
Optionally, the interposer includes:
the bottom plate is circular and is connected with the cylindrical battery cell;
the bending side plate is circumferentially connected with the bottom plate, arranged at an included angle with the bottom plate and abutted against the side wall of the circumferential inner groove;
the bending piece is vertically arranged, one axial end of the bending piece is connected with the bending side plate in the circumferential direction, and the other axial end of the bending piece can be bent and abutted to the cover plate.
Optionally, the adapter further comprises a sealing element, the sealing element is used for sleeving and sealing the periphery of the cover plate and the periphery of the other axial end of the adapter sheet, and the opening end of the shell is bent inwards and abutted to the sealing element.
Optionally, the sealing element is a sealing rubber ring, the cross section of the sealing rubber ring is L-shaped, the outer side of the L-shaped sealing rubber ring abuts against the circumferential inner groove, and the inner side of the L-shaped sealing rubber ring can be bent to partially wrap the periphery of the cover plate.
Optionally, one end of the cylindrical battery cell, which is in contact with the interposer, is an anode or cathode output end.
Optionally, the material of the housing is aluminum or steel.
In another aspect, a battery manufacturing method is provided for manufacturing the battery assembly, including the steps of:
assembling, namely assembling the cylindrical battery cell and the adapter plate in the shell;
a rolling groove processing step, namely rolling the periphery of the shell to form a circumferential inner groove so that one axial end of the adapter sheet is pressed between the circumferential inner groove and the cylindrical battery cell;
bending, namely bending the other axial end of the adapter plate, and assembling the cover plate on the other axial end of the adapter plate;
and sealing, namely compressing and packaging the opening end of the shell.
Optionally, in the bending step, a sealing element is further included, the sealing element abuts against the side wall of the circumferential inner groove, and the other axial end of the adapter piece is bent towards the sealing element.
Optionally, in the sealing step, the open end of the housing is bent inwardly to press fit against the seal member.
Optionally, in the assembling step, the adaptor sheet is connected to a tab portion of the positive or negative output end of the cylindrical battery cell.
The invention has the beneficial effects that:
the adapter plate of the battery pack is fixedly connected with the shell in a mechanical matching connection mode, and compared with the traditional welding connection mode, the mechanical matching connection mode has the advantages of small damage to parts, low processing difficulty and cost and convenience in batch production and manufacturing. The adapter plate of the battery pack is in direct contact with the shell and the cover plate respectively, so that the shell and the cover plate can be charged simultaneously.
The battery manufacturing method is used for manufacturing the battery assembly, and the battery manufacturing method can realize the connection between the adapter sheet and the shell without the intervention of laser welding, thereby avoiding the thermal damage of each part, reducing the production difficulty and improving the production efficiency.
Drawings
Fig. 1 is a structural sectional view of a battery pack according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an interposer according to an embodiment of the present invention;
FIG. 3 is a first schematic diagram illustrating a method of manufacturing a battery according to an embodiment of the present invention;
FIG. 4 is a second schematic view of a battery manufacturing method according to an embodiment of the present invention;
fig. 5 is a manufacturing schematic diagram three of a battery manufacturing method according to an embodiment of the invention;
fig. 6 is a manufacturing schematic diagram of a fourth manufacturing method of a battery using the embodiment of the invention;
fig. 7 is a manufacturing schematic diagram of a battery manufacturing method according to an embodiment of the present invention.
In the figure:
1. a housing; 11. a circumferential inner groove; 2. a patch; 21. a base plate; 211. a central bore; 22. bending the side plates; 23. bending the sheet; 221. a boss structure; 3. a cover plate; 4. a seal member; 5. and (5) a cylindrical battery cell.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar parts throughout or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1, the present invention provides a battery pack including a case 1, an interposer 2, and a cover plate 3. The shell 1 is hollow, one end of the shell is opened, the cylindrical battery cell 5 is installed in the shell 1, and the shell 1 is inwards recessed in the circumferential direction to form a circumferential inner groove 11; the adapter sheet 2 is arranged on the cylindrical battery core 5, and one axial end of the adapter sheet 2 is pressed between the circumferential inner groove 11 and the cylindrical battery core 5 and is abutted against the circumferential inner groove 11 and the cylindrical battery core 5; the axial other end butt of apron 3 and switching piece 2, the open end of casing 1 is buckled location apron 3 inwards.
In this embodiment, as shown in fig. 1, the casing 1 is a cylindrical hollow interior and has an open end, the cylindrical battery cell 5 is assembled inside the casing 1, the outer peripheral surface of the casing 1 is concave through rolling machinery to form a circumferential inner groove 11, one axial end of the adapter sheet 2 is pressed between the circumferential inner groove 11 and the cylindrical battery cell 5, the other axial end of the adapter sheet 2 is abutted to the cover plate 3, and the open end of the casing 1 is bent inwards to press the positioning cover plate 3. The adaptor piece 2, with casing 1 and apron 3 between fixed linking to each other and form the electric conductance through mechanical fit's connected mode, the processing degree of difficulty and with low costs make things convenient for batch production to make, realized casing 1 and apron 3 effect that can be electrified simultaneously.
Optionally, the interposer 2 includes a bottom plate 21, a bent side plate 22, and a bent piece 23, where the bottom plate 21 is circular and connected to the cylindrical battery cell 5; the bending side plate 22 is circumferentially connected with the bottom plate 21, and the bending side plate 22 and the bottom plate 21 are arranged at an included angle and are abutted against the side wall of the circumferential inner groove 11; the bending piece 23 is vertically arranged, one axial end of the bending piece 23 is circumferentially connected with the bending side plate 22, and the other axial end of the bending piece 23 can be bent to abut against the cover plate 3.
The concrete structure of the connecting sheet 2 in this embodiment is shown in fig. 2, with reference to fig. 1, a bottom plate 21 is circular and connected to a tab portion of a cylindrical battery cell 5, a bent side plate 22 is conical and connected to the bottom plate 21 in the circumferential direction, and under the extrusion action of a circumferential inner groove 11, the bent side plate 22 is folded toward the bottom plate 21 and is in tight abutting contact with the circumferential inner groove 11; the bending pieces 23 are cylindrical surfaces, one axial end of each bending piece is circumferentially connected with the bending side plate 22, the other axial end of each bending piece 23 is bent outwards to form a connecting table board, and the cover plate 3 is placed on the connecting table board and is abutted and contacted with the connecting table board. The current drawn from the tab of the cylindrical cell 5 can flow through the cover plate 3 and the housing 1, so that the cover plate 3 and the housing 1 can be charged simultaneously.
Optionally, the outer surface of the bent side plate 22 is provided with a boss structure 221, and under the pressing action of the circumferential inner groove 11, the bent side plate 22 is folded in half towards the bottom plate 21, and the circumferential inner groove 11 is in close abutting contact with the boss structure 221. In this embodiment, as shown in fig. 2, the boss structures 221 are arc-shaped protrusions arranged around the circumference of the bending side plate 22, three sets of boss structures 221 are arranged, the three sets of boss structures 221 are evenly arranged on the bending side plate 22 at intervals, the boss structures 221 are arranged around the circumference of the bending side plate 22 for one circle, and under the extrusion action of the circumferential inner groove 11, the boss structures 221 on the bending side plate 22 are in close abutting contact with the circumferential inner groove 11, so that the close connection with the housing 1 can be realized even under the vibration condition, and the contact stability is ensured. In this embodiment, the cross-sectional shape of the bump structure 221 in fig. 1 is a semi-circle, and the cross-sectional shape may also be a rectangle or other regular or irregular cross-sectional shapes, which is not limited to the embodiment of the present invention
Optionally, as shown in fig. 2, a center hole 211 is opened at a center of the bottom plate 21. It can be understood that the cylindrical battery cell 5 is formed by winding, a reel is usually wound in the cylindrical battery cell 5, and after the cylindrical battery cell 5 is assembled, the reel is drawn out. In this embodiment, a center hole 211 is formed in a center of the bottom plate 21, and the center hole 211 facilitates drawing out the reel in the cylindrical electrical core 5. In addition, the central hole 211 plays a role in reducing weight, reducing the use of manufacturing materials and reducing the production and manufacturing cost.
Optionally, the battery pack further comprises a sealing member 4, the sealing member 4 is used for sleeving and sealing the periphery of the cover plate 3 and the periphery of the other axial end of the adapter sheet 2, and the opening end of the shell 1 is bent inwards and abutted with the sealing member 4. As shown in fig. 1, in the present embodiment, the seal 4 seals the outer periphery of the cover plate 3 and the outer periphery of the other end in the axial direction of the bent piece 23, and the open end of the case 1 is bent inward and abuts against the seal 4. In this embodiment, in order to ensure the connection sealing property between the outer peripheries of the cover plate 3 and the bent pieces 23, the sealing member 4 is fitted over the outer periphery of the cover plate 3 and the outer periphery of the bent pieces 23 connected to the cover plate 3, and the circumferential gap is filled to improve the sealing property.
Optionally, the sealing element 4 is a sealing rubber ring, the cross section of the sealing rubber ring is L-shaped, the outer side of the L-shaped sealing rubber ring abuts against the circumferential inner groove 11, and the inner side of the L-shaped sealing rubber ring can be bent to partially wrap the periphery of the cover plate 3. As shown in fig. 1, referring to fig. 5, the sealing element 4 is made of elastic insulating material for the sealing rubber ring, the cross section of the sealing rubber ring is L-shaped, the outer side of the L-shaped sealing rubber ring is abutted to the circumferential inner groove 11, the bending piece 23 bends towards the outer side of the L-shaped sealing rubber ring and is abutted to the outer side of the L-shaped sealing rubber ring to form a connecting table top, the cover plate 3 is installed on the connecting table top, the inner side of the L-shaped sealing rubber ring is abutted to the inner wall of the shell 1 and is attached to the cover plate 3 under the bending action of the opening end of the shell 1, as shown in fig. 2, the sealing rubber ring is pressed and mounted in Contraband shape to wrap the peripheries of the cover plate 3 and the bending piece 23.
Optionally, one end of the cylindrical battery cell 5, which is in contact with the interposer 2, is an anode or cathode output end. In this embodiment, one end of the cylindrical electrical core 5 contacting the battery patch 2 may be a positive output end or a negative output end. When the end of the cylindrical battery cell 5 contacting the battery adapter sheet 2 is the positive electrode output end, the battery adapter sheet 2 is used as the positive electrode adapter sheet, the material of the shell 1 is preferably aluminum, the aluminum shell is easy to process, and the weight energy density can be effectively improved. When one end of the cylindrical battery cell 5, which is in contact with the battery adapter sheet 2, is a negative electrode output end, the battery adapter sheet 2 is used as a negative electrode adapter sheet, the shell 1 is preferably made of steel, and the steel shell is integrally provided with a negative electrode and is electrically conductive, so that the phenomenon of iron precipitation cannot occur.
The embodiment also provides a battery manufacturing method for manufacturing the battery assembly, which comprises the following steps:
assembling, namely assembling the cylindrical battery cell 5 and the adapter plate 2 in the shell 1;
in this step, as shown in fig. 3, the adaptor sheet 2 is connected to the tab portion of the cylindrical battery cell 5, and is assembled and mounted inside the casing 1, and the adaptor sheet 2 is connected to the tab portion of the positive or negative output end of the cylindrical battery cell 5.
A rolling groove processing step, namely rolling the periphery of the shell 1 to form a circumferential inner groove 11 so that one axial end of the adapter sheet 2 is pressed between the circumferential inner groove 11 and the cylindrical battery cell 5;
in this step, the outer periphery of the housing 1 is rolled by a rolling machine to form a circumferential inner groove 11 in the outer periphery of the housing 1, the bent side plate 22 is folded in half toward the bottom plate 21, and the circumferential inner groove 11 is brought into close contact with the boss structure 221 on the bent side plate 22.
A bending step, namely bending the other axial end of the adapter plate 2, and assembling the cover plate 3 at the other axial end of the adapter plate 2;
in this step, the sealing element 4 is assembled, the sealing element 4 is abutted against the side wall of the circumferential inner groove 11, and the other axial end of the adapter sheet 2 is bent towards the sealing element 4. As shown in fig. 6 and 7, after the circumferential inner groove 11 is formed by rolling, the sealing member 4 is assembled in the housing 1, the sealing member 4 abuts against one side of the circumferential inner groove 11 away from the boss structure 221, then the other axial end of the adaptor piece 2 is bent so that the other axial end of the adaptor piece 2 forms a connecting table, and the cover plate 3 is assembled on the connecting table at the other axial end of the adaptor piece 2.
And sealing, namely pressing the opening end of the packaging shell 1.
In this step, the open end of the casing 1 is bent inward, the cover plate 3 is positioned and pressed, and the sealing member 4 is attached to the cover plate 3 under the bending action of the open end of the casing 1, so as to press the cover plate 3 tightly.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A battery assembly, comprising:
the battery comprises a shell (1), wherein the shell (1) is hollow, one end of the shell is opened, a cylindrical battery cell (5) is installed in the shell (1), and the shell (1) is inwards recessed in the circumferential direction to form a circumferential inner groove (11);
the adapter sheet (2) is mounted on the cylindrical battery core (5), and one axial end of the adapter sheet (2) is press-mounted between the circumferential inner groove (11) and the cylindrical battery core (5) and is abutted against both the circumferential inner groove (11) and the cylindrical battery core (5);
the cover plate (3) is abutted to the other axial end of the adapter sheet (2), and the opening end of the shell (1) is bent inwards to position the cover plate (3).
2. The battery assembly according to claim 1, wherein the interposer (2) comprises:
the bottom plate (21) is circular and is connected with the cylindrical battery cell (5);
the bending side plate (22) is circumferentially connected with the bottom plate (21), and the bending side plate (22) and the bottom plate (21) are arranged at an included angle and are abutted against the side wall of the circumferential inner groove (11);
bending piece (23), vertical setting, the axial one end of bending piece (23) with curb plate (22) circumference of buckling is connected, the axial other end of bending piece (23) can buckle and with apron (3) butt.
3. The battery pack according to claim 1, further comprising a sealing member (4), wherein the sealing member (4) is configured to seal the outer periphery of the cover plate (3) and the outer periphery of the other axial end of the adaptor piece (2) in a sleeved manner, and the open end of the housing (1) is bent inward and abuts against the sealing member (4).
4. The battery assembly according to claim 3, wherein the sealing member (4) is a sealing rubber ring, the cross section of the sealing rubber ring is L-shaped, the outer side of the L-shaped sealing rubber ring is abutted with the circumferential inner groove (11), and the inner side of the L-shaped sealing rubber ring can be bent to wrap the periphery of the cover plate (3).
5. The battery assembly according to claim 1, wherein the end of the cylindrical battery cell (5) in contact with the interposer (2) is a positive or negative output end.
6. A battery pack according to claim 5, characterized in that the material of the housing (1) is aluminium or steel.
7. A battery manufacturing method for manufacturing the battery assembly according to any one of claims 1 to 6, comprising the steps of:
assembling, namely assembling the cylindrical battery cell (5) and the adapter plate (2) in the shell (1);
a rolling groove processing step, namely rolling the periphery of the shell (1) to form a circumferential inner groove (11) so that one axial end of the adapter sheet (2) is pressed between the circumferential inner groove (11) and the cylindrical battery core (5);
bending, namely bending the other axial end of the adapter sheet (2), and assembling the cover plate (3) on the other axial end of the adapter sheet (2);
and a sealing step, wherein the opening end of the shell (1) is compressed and sealed.
8. The battery manufacturing method according to claim 7, further comprising, in the bending step, assembling a sealing member (4), wherein the sealing member (4) abuts against a side wall of the circumferential inner groove (11), and the other axial end of the interposer (2) is bent toward the sealing member (4).
9. The battery manufacturing method according to claim 8, wherein in the sealing step, the open end of the case (1) is bent inward to press-fit and seal against the sealing member (4).
10. The battery manufacturing method according to claim 7, wherein in the assembling step, the adaptor sheet (2) is connected to a tab portion of a positive or negative output end of the cylindrical battery cell (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210427204.8A CN114725628B (en) | 2022-04-21 | 2022-04-21 | Battery assembly and battery manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210427204.8A CN114725628B (en) | 2022-04-21 | 2022-04-21 | Battery assembly and battery manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114725628A true CN114725628A (en) | 2022-07-08 |
| CN114725628B CN114725628B (en) | 2024-05-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115347328A (en) * | 2022-07-28 | 2022-11-15 | 江苏正力新能电池技术有限公司 | Cylindrical battery switching structure, cylindrical battery and assembling method thereof |
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| CN114725628B (en) | 2024-05-10 |
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