CN115000642A - Square laminated battery - Google Patents
Square laminated battery Download PDFInfo
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- CN115000642A CN115000642A CN202210658004.3A CN202210658004A CN115000642A CN 115000642 A CN115000642 A CN 115000642A CN 202210658004 A CN202210658004 A CN 202210658004A CN 115000642 A CN115000642 A CN 115000642A
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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
- 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
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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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
- 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 of a single cell or a single battery
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/103—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure prismatic or rectangular
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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
- 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 of a single cell or a single battery
- H01M50/14—Primary casings, jackets or wrappings of a single cell or a single battery for protecting against damage caused by external factors
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
- H01M50/474—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the cells
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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
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
- H01M50/512—Connection only in parallel
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
- 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)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application discloses a square laminated battery, which comprises a combined cover plate, a laminated assembly, an insulating film and an aluminum shell, wherein the laminated assembly comprises a pole group, a positive pole lug and a negative pole lug are respectively arranged on two sides of the pole group, electrode output connecting assemblies are respectively arranged on the positive pole lug and the negative pole lug, and the electrode output connecting assemblies are arranged in a bending mode; the combined cover plate comprises a top cover plate, a plurality of electrode combined terminals are mounted on the top cover plate, and an insulating thrust piece electrode output connecting assembly comprising an electrode output terminal and an electrode connecting piece connected to the electrode output terminal is arranged on one side, located on the laminated body assembly, of the top cover plate. In this application, through the setting to the battery structure, can weld after sealing, guarantee the heavy current output performance of battery, can expand the square battery capacity through the parallelly connected structure of a plurality of stack subassemblies, can also guarantee that the inside no metal smoke and dust of battery gets into, improve the reliability of battery and reduce the probability of taking place the incident, improve the volumetric specific energy of battery moreover.
Description
Technical Field
The invention relates to the technical field of energy storage batteries, in particular to a square laminated battery.
Background
As a driving energy source, the lithium ion battery is widely applied to new energy vehicles and energy storage, and at present, the square battery has high efficiency during system integration, larger monomer capacity than that of a cylindrical battery and a soft package battery, and higher cost performance, so the occupation ratio of the square battery in the fields of new energy vehicles and energy storage is up to more than 80%, and the square battery is an open key point in competition of various enterprises.
In the manufacturing process of a general square battery, a positive (negative) pole piece and a connecting sheet are required to be welded, and then the connecting sheet and a pole on a cover plate are welded together to realize electric connection. And the welding mode comprises two modes of ultrasonic welding and laser welding. Because the square battery has larger capacity and the connecting sheet is also correspondingly thicker and cannot meet the welding firmness by ultrasonic welding, the industry usually adopts laser welding, particularly for a multi-layer laminated battery, the multi-layer laminated battery is mainly applied to the working environment with large current, a plurality of groups of batteries work simultaneously, welding spots are influenced by the process in the manufacturing process, a large amount of metal splash and metal smoke dust in the laser welding process remain in the batteries, after metal particles enter the batteries, the self-discharge of the batteries is increased in the batteries to cause short circuit, thermal runaway can be induced in the using process, particularly under the condition that the plurality of groups of batteries work simultaneously, the plurality of groups of batteries are integrated together and are one of the main factors of battery spontaneous combustion, the problem of metal splash in the laser welding process is always an industrial hotspot, and the measures of negative pressure collection, shielding and the like are adopted to avoid the condition that the metal smoke dust enters the batteries, we have therefore proposed a square laminate battery to address the above problems.
Disclosure of Invention
The application provides a square laminated battery, has solved traditional battery structure and has had a great deal of solder joint, when adopting the laser welding, has inside a large amount of metal smoke and dust got into the battery, influences the problem of battery performance.
The application provides a square laminated battery, which comprises a combined cover plate, a laminated assembly, an insulating film and an aluminum shell, wherein the laminated assembly comprises a pole group, both sides of the pole group are respectively provided with a positive pole lug and a negative pole lug, the positive pole lug and the negative pole lug are both provided with an electrode output connection assembly, and the electrode output connection assembly is arranged in a bending manner;
the combined cover plate comprises a top cover plate, a plurality of electrode combined terminals are mounted on the top cover plate, and an insulating thrust piece is arranged on one side, located on the laminated body assembly, of the top cover plate;
the electrode output connecting assembly comprises an electrode output terminal and an electrode connecting sheet connected to the electrode output terminal, and one end of the electrode connecting sheet connected with the electrode output terminal is bent;
and the electrode combination terminal is provided with an electrode cylindrical hole, one end of the electrode output terminal is positioned in the electrode cylindrical hole, and the electrode output terminal is welded in the electrode cylindrical hole in a sealing laser mode.
Preferably, one end of the electrode output terminal and the external connection end of the electrode combination terminal are in the same plane.
Preferably, the electrode output terminal and the electrode connecting piece are welded after being riveted.
Preferably, the electrode combination terminal comprises an electrode metal ring fixed on the top cover plate, an electrode terminal is installed in the electrode metal ring, an electrode insulating gasket is arranged around the electrode metal ring, an electrode insulating ring and an anode sealing ring are arranged between the electrode metal ring and the electrode terminal, and the electrode cylindrical hole is located in the electrode terminal.
Preferably, the top cover plate is made of an aluminum alloy material.
Preferably, the insulating thrust piece and the top cover plate are integrally injection-molded.
Preferably, the aluminum case is laser welded to the combination cover plate.
Preferably, one end of the electrode connecting sheet connected with the electrode output terminal is bent at 90 degrees.
Preferably, the electrode output connecting assembly is perpendicular to the pole group.
Preferably, the positive pole lug and the negative pole lug are connected to the electrode output connection assembly through ultrasonic welding.
According to the technical scheme, the application provides a square laminated battery, during production, a positive plate, a negative plate and a diaphragm are alternately folded into a pole group in a laminating mode, a positive pole lug and a negative pole lug are respectively arranged on two sides of the pole group, an electrode output terminal and an electrode connecting sheet are riveted and then welded or directly welded together to manufacture an electrode output connecting assembly, two electrode output connecting assemblies at two ends of the pole group are respectively welded with the positive pole lug and the negative pole lug in an ultrasonic mode, the electrode output connecting assemblies at two ends of the pole group are bent to shorten the length of the battery, the electrode connecting sheets are bent by 90 degrees to form a laminated assembly, the laminated assembly can be one or more, so that the capacity of the square laminated battery is increased, an insulating film is wrapped outside the laminated assembly, and the electrode output terminal is inserted into an electrode cylindrical hole in a combined cover plate at a corresponding position, and (3) putting the laminated body assembly with the assembled cover plate into an aluminum shell, sealing and welding the periphery of the aluminum shell and the assembled cover plate by adopting laser welding, and then sealing and welding the periphery of the electrode output terminal in contact with the electrode cylindrical hole by laser welding.
Compared with the prior art, the invention has the beneficial effects that:
1. the electrode output connecting assembly and the electrode connecting sheet are arranged in a bending mode, so that the volume of the battery is reduced, the space is saved, and the volumetric specific energy of the battery is improved;
2. by changing the structure of the battery, the sealing can be carried out firstly and then the welding can be carried out, so that the possibility that metal smoke dust splashed in the laser welding process enters the battery is fundamentally eliminated, the reliability of the battery is greatly improved, and the probability of safety accidents is reduced;
3. through the design of this application mechanism, can bear the output of heavy current, consequently can adopt a plurality of stack subassemblies to connect in parallel and expand the battery capacity, guaranteed the heavy current output performance of battery.
To sum up, in this application, through the setting to the battery structure, can weld after sealing, guaranteed the heavy current output performance of battery, can expand the square battery capacity through the parallelly connected structure of a plurality of stack subassemblies, can also guarantee that the inside no metal smoke and dust of battery gets into, improve the reliability of battery and reduce the probability of taking place the incident, improve the volumetric specific energy of battery moreover.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiment will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive laboriousness.
Fig. 1 is a schematic structural view of a square laminated battery according to the present invention;
fig. 2 is a schematic diagram of a single stack assembly of a prismatic laminate battery according to the present invention;
fig. 3 is a schematic diagram of a plurality of stacked body assemblies of a prismatic laminated battery according to the present invention;
fig. 4 is a schematic structural diagram of a stack assembly of a square-shaped laminated battery according to the present invention;
fig. 5 is a schematic view of an electrode output connection assembly of a square laminated battery according to the present invention;
fig. 6 is a schematic diagram of a combined cover plate structure of a square laminated battery according to the present invention;
fig. 7 is a schematic structural view of an electrode output connection assembly of a square laminated battery according to the present invention;
fig. 8 is a schematic structural view of an electrode assembly terminal of a prismatic laminated battery according to the present invention.
In the figure: 1 combined cover plate, 11 electrode combined terminal, 111 electrode insulating washer, 112 electrode terminal, 113 electrode metal ring, 114 electrode insulating ring, 115 positive electrode sealing ring, 116 electrode cylindrical hole, 12 top cover plate, 13 insulating thrust piece, 14 safety valve, 15 liquid injection port, 16 sealing piece, 2 laminated body component, 21 electrode output connecting component, 211 electrode output terminal, 212 electrode connecting piece, 22 electrode group, 23 negative electrode tab, 24 positive electrode tab, 3 insulating film, 4 aluminum shell.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1-8, a square laminated battery, including a combined cover plate 1, a laminated body assembly 2, an insulating film 3 and an aluminum case 4, which is a conventional structure of the battery, is further provided with a safety valve 14 and a liquid injection port 15, wherein the liquid injection port 15 is provided with a sealing sheet 16 for sealing, because the square battery is mainly applied to the field of new energy automobiles, the battery capacity is large, the current is large, therefore, the conventional battery structure can only be subjected to laser welding before the battery is assembled, metal smoke and dust fall into the battery, the self-discharge of the battery is increased during the use process, short circuit is caused, thermal runaway can be induced, and the natural phenomenon of part of new energy automobiles is related to the situation, so the battery is improved through the design and research and development of the company, the problems are solved, the laminated body assembly 2 includes a pole group 22, and the pole group 22 is produced in a conventional manner, the positive plate, the negative plate and the diaphragm are alternately folded to form the laminated structure, the two sides of the pole group 22 are respectively provided with a positive pole tab 24 and a negative pole tab 23, the positive pole tab 24 and the negative pole tab 23 are arranged at the two ends of the pole group 22, the positive pole tab 24 and the negative pole tab 23 are both provided with an electrode output connection assembly 21, because the contact area is large, the electrode output connecting component 21 is welded by ultrasonic welding, the positive electrode tab 24 and the negative electrode tab 23 are both connected to the electrode output connection assembly 21 through ultrasonic welding, the performance of the battery cannot be affected, the electrode output connection assembly 21 is arranged in a bent mode, the bending is carried out after the electrode output connection assembly 21 and the tabs are welded, the electrode output connection assembly 21 is folded to a position perpendicular to the electrode group 22, the width of the electrode group 22 is reduced, the internal space of the battery can be saved, and the volumetric specific energy of the battery is improved;
the combined cover plate 1 comprises a top cover plate 12, the top cover plate 12 is made of an aluminum alloy material, the supporting strength of the top cover plate 12 is improved, the structure of a battery is guaranteed, the deformation of the top cover plate 12 is avoided, a plurality of electrode combined terminals 11 are mounted on the top cover plate 12, an insulating thrust piece 13 is arranged on one side, located on the laminated body assembly 2, of the top cover plate 12, the insulating thrust piece 13 and the top cover plate 12 are integrated through injection molding, the fastening relation between the insulating thrust piece 13 and the top cover plate 12 is improved, and the insulating thrust piece 13 plays roles in insulation and preventing the laminated body assembly from moving;
the electrode output connection assembly 21 comprises an electrode output terminal 211 and an electrode connection piece 212 connected to the electrode output terminal 211, the electrode connection piece 212 is a flexible piece and can be folded, the electrode connection piece 212 and a tab of the electrode group 22 are welded through ultrasonic welding, the thickness is small, the contact area is large, the performance of a connection position cannot be affected, one end, connected with the electrode output terminal 211, of the electrode connection piece 212 is bent to 90 degrees, the electrode output terminal 211 is bent to the position above the electrode group 22 and corresponds to the electrode combination terminal 11 on the combination cover plate 1, the size of the battery can be reduced, the influence of vertical movement on the connection position in the charging and discharging or moving process of the battery can be reduced, and the service life of the connection position is prolonged;
an electrode cylindrical hole 116 is arranged on the electrode combination terminal 11, one end of the electrode output terminal 211 is positioned in the electrode cylindrical hole 116, the electrode output terminal 211 can be fixed in an interference fit mode, before welding, the welding can be carried out after the aluminum shell 4 and the combination cover plate 1 are welded along a circle in a sealing mode, the aluminum shell 4 and the combination cover plate 1 are welded in a laser mode, the electrode output terminal 211 is welded in the electrode cylindrical hole 116 in a sealing mode, during welding, the welding is carried out along the joint between the upper end face of the electrode cylindrical hole 116 and the electrode output terminal 211, a circle of the electrode output terminal 211 is welded on the electrode cylindrical hole 116, a circle of the electrode output terminal 211 of the battery is sealed, the structural strength of the point is improved, meanwhile, the sealing of the battery is guaranteed, the laser welding in the battery production can be carried out through the design of the battery structure, the sealing is carried out after the battery, the possibility that metal in the laser welding process splashes into the battery is fundamentally eliminated, the reliability of the battery is greatly improved.
Furthermore, in order to reduce the resistance between the electrode output terminal 211 and the electrode combination terminal 11 and not affect the subsequent multi-electrode group assembly of the electrode combination terminal 11, one end of the electrode output terminal 211 and the external connection end of the electrode combination terminal 11 are positioned on the same plane, so that the maximum contact area between the electrode output terminal 211 and the electrode combination terminal 11 can be met, the flatness of the plane of the electrode combination terminal 11 can be ensured, and the welding is convenient.
In order to further improve the connection strength between the electrode output terminal 211 and the electrode connecting sheet 212 and avoid the breakage of the connection between the electrode output terminal 211 and the electrode connecting sheet 212, in the invention, the electrode output terminal 211 and the electrode connecting sheet 212 are welded after riveting, so that the resistance of the point is reduced, and the electrode output terminal 211 and the electrode connecting sheet 212 are firmly connected.
Further ensuring the reliability of the connection, in the present invention, the electrode combination terminal 11 includes an electrode metal ring 113 fixed on the top cover plate 12, wherein the electrode metal ring 113 is made of aluminum alloy, the electrode metal ring 113 of the negative electrode is made of one of copper, stainless steel and carbon steel, an electrode terminal 112 is installed in the electrode metal ring 113 for the connection of the electrode, an electrode insulating gasket 111 is arranged around the electrode metal ring 113, an electrode insulating ring 114 and a positive sealing ring 115 are arranged between the electrode metal ring 113 and the electrode terminal 112 for the insulation and sealing, an electrode cylindrical hole 116 is located on the electrode terminal 112, and an electrode output terminal 211 is connected with the electrode terminal 112 to realize the communication of the battery.
In the specific implementation process of the application, the laminated stack assemblies 2 can be arranged into 1 or more, so that the capacity of the square laminated battery is increased, different production requirements are met, and the method for manufacturing the square laminated battery by adopting 1 or more laminated stack assemblies 2 is the same. Specifically, a plurality of laminate assemblies 2 can be stacked, in the present application, the negative electrode of the electrode output connection assembly 21 is placed on one side, the positive electrode is placed on the other side, the same poles are placed on the same side, and then the insulating film 3 is wrapped outside the laminate assemblies 2, each specific laminate assembly 2 can be used independently, or the laminate assemblies 2 between adjacent laminates can be used in series, or the laminate assemblies 2 between adjacent laminates can be used in parallel, and the use modes are various, so that when the laminate assemblies 2 are used in parallel, the electrode terminals 112 on the same side can be used as a whole, the production efficiency is improved, and the resistance between connections is reduced.
According to the technical scheme, during production, the positive plate, the negative plate and the diaphragm are alternately folded into the electrode group 22 in a lamination mode, the positive tab 24 and the negative tab 23 are respectively arranged at two sides of the electrode group 22, the electrode output terminal 211 and the electrode connecting sheet 212 are riveted and then welded or directly welded together to manufacture the electrode output connecting assembly 21, the two electrode output connecting assemblies 21 at two ends of the electrode group 22 are respectively welded with the positive tab 24 and the negative tab 23 in an ultrasonic mode, the electrode output connecting assemblies 21 at two ends of the electrode group 22 are bent for 90 degrees, the length of the battery is shortened, the electrode connecting sheet 212 is bent for 90 degrees to form the laminated body assembly 2, one or more laminated body assemblies 2 can be adopted to increase the capacity of the square laminated battery, the insulating film 3 is wrapped outside the laminated body assembly 2, the electrode output terminal 211 is inserted into the electrode cylindrical hole 116 in the combined cover plate 1 at the corresponding position, the laminated body assembly 2 with the assembled combined cover plate 1 installed is placed into the aluminum shell 4, the aluminum shell 4 and the periphery of the assembled cover plate 1 are hermetically welded by laser welding, and then the electrode output terminal 211 and the electrode cylindrical hole 116 are hermetically welded by laser welding in one circle.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The above-described embodiments of the present application do not limit the scope of the present application.
Claims (10)
1. A square laminate battery comprising a combined lid plate (1), a laminate assembly (2), an insulating film (3) and an aluminum case (4), characterized in that: the laminated assembly (2) comprises a pole group (22), wherein a positive pole lug (24) and a negative pole lug (23) are respectively arranged on two sides of the pole group (22), electrode output connection assemblies (21) are respectively arranged on the positive pole lug (24) and the negative pole lug (23), and the electrode output connection assemblies (21) are arranged in a bending mode;
the combined cover plate (1) comprises a top cover plate (12), a plurality of electrode combined terminals (11) are mounted on the top cover plate (12), and an insulating thrust piece (13) is arranged on one side, located on the laminated body assembly (2), of the top cover plate (12);
the electrode output connecting assembly (21) comprises an electrode output terminal (211) and an electrode connecting piece (212) connected to the electrode output terminal (211), and one end, connected with the electrode output terminal (211), of the electrode connecting piece (212) is bent;
an electrode cylindrical hole (116) is formed in the electrode combination terminal (11), one end of the electrode output terminal (211) is located in the electrode cylindrical hole (116), and the electrode output terminal (211) is welded in the electrode cylindrical hole (116) in a sealed laser mode.
2. A prismatic laminated battery according to claim 1, wherein one end of said electrode output terminal (211) is in the same plane as the external terminal of said electrode assembly terminal (11).
3. A square laminate battery according to claim 1, wherein the electrode output terminal (211) and the electrode connecting piece (212) are welded after riveting.
4. A prismatic laminated battery according to any one of claims 1 to 3, wherein said electrode assembly terminal (11) comprises an electrode metal ring (113) fixed to said top cover plate (12), said electrode metal ring (113) having an electrode terminal (112) mounted therein, an electrode insulating gasket (111) provided around said electrode metal ring (113), an electrode insulating ring (114) and a positive electrode gasket (115) provided between said electrode metal ring (113) and said electrode terminal (112), and said electrode cylindrical hole (116) provided in said electrode terminal (112).
5. A prismatic laminated battery according to claim 1, wherein said top cover plate (12) is made of an aluminum alloy.
6. A prismatic laminated battery according to claim 1, wherein said insulating thrust member (13) is injection molded integrally with said top cover plate (12).
7. A prismatic laminated battery according to claim 1, wherein said aluminum can (4) is laser welded to said composite cover plate (1).
8. A prismatic laminated battery according to claim 1, wherein an end of said electrode connecting tab (212) connected to said electrode output terminal (211) is bent at 90 °.
9. A prismatic laminated battery according to claim 1, wherein said electrode output connection assembly (21) is arranged perpendicularly to said pole group (22).
10. A prismatic laminated battery according to claim 1, wherein said positive electrode tab (24) and said negative electrode tab (23) are both joined to said electrode output connection assembly (21) by ultrasonic welding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210658004.3A CN115000642A (en) | 2022-06-10 | 2022-06-10 | Square laminated battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210658004.3A CN115000642A (en) | 2022-06-10 | 2022-06-10 | Square laminated battery |
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| CN115000642A true CN115000642A (en) | 2022-09-02 |
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| JP2015153534A (en) * | 2014-02-12 | 2015-08-24 | トヨタ自動車株式会社 | Method of manufacturing secondary battery |
| CN105762322A (en) * | 2016-03-18 | 2016-07-13 | 宁德时代新能源科技股份有限公司 | Secondary battery |
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| CN216528987U (en) * | 2021-09-24 | 2022-05-13 | 江苏正力新能电池技术有限公司 | Secondary battery |
| CN113782889A (en) * | 2021-09-29 | 2021-12-10 | 欣旺达电动汽车电池有限公司 | Battery module and battery pack |
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