CN110620209A - Battery having a plurality of electrodes and battery module using the same - Google Patents
Battery having a plurality of electrodes and battery module using the same Download PDFInfo
- Publication number
- CN110620209A CN110620209A CN201910532116.2A CN201910532116A CN110620209A CN 110620209 A CN110620209 A CN 110620209A CN 201910532116 A CN201910532116 A CN 201910532116A CN 110620209 A CN110620209 A CN 110620209A
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- Prior art keywords
- battery
- battery module
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- terminals
- cathode
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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
-
- 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
-
- 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
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The present invention relates to a battery having a plurality of electrodes and a battery module using the same, in which the battery module can be constructed only by the connection between the electrodes without a separate bus bar, and an anode terminal and a cathode terminal of the battery are formed to protrude to the outside in order to increase the degree of freedom of the connection, wherein at least one selected from the anode terminal and the cathode terminal is formed at opposite sides, so that the battery module can be formed in various forms according to the layout of a vehicle.
Description
Technical Field
The present invention relates to a battery having a plurality of electrodes and a battery module using the same, and more particularly, to a battery module in which a plurality of electrodes are formed at both side ends of a secondary battery.
Background
In recent years, secondary batteries that can be charged and discharged have received attention as power sources for Electric Vehicles (EV), Hybrid Electric Vehicles (HEV), plug-in hybrid electric vehicles (P-HEV), and the like, which have been proposed as solutions to air pollution such as conventional gasoline vehicles, diesel vehicles, and the like using fossil fuels. Unlike small-sized mobile devices, in the case of a large-sized device such as a vehicle in which a large-sized battery module connecting a plurality of battery cells is used according to the need for high output and large capacity, when various devices are constructed using such a large-sized battery module, the electrical connection structure between the unit cell modules becomes an important factor in determining whether to be applied according to the structure of the device. For example, when a plurality of battery packs are mounted in consideration of an electrical connection structure in a limited space of a platform of an electric vehicle, it is necessary to add additional components or change a coupling structure of the battery modules according to the positional characteristics of electrode terminals of the respective battery modules.
In addition, due to the limitations in the positions of the positive and negative terminals, which are the final terminals of the battery modules, it often occurs that separate bus bars need to be used when the battery modules are combined. When it is determined whether the bus bars are coupled or not according to the structure of the device in which the battery module is mounted and used, the productivity of the battery module assembly may be reduced and the operational performance or the driving reliability of various devices using the battery module may be greatly affected. In addition, in view of the recent trend toward increasingly diverse application fields of secondary batteries, it is required to improve the degree of freedom in design of electrical connection based on battery modules.
Therefore, the following technique is disclosed in korean laid-open patent publication No. 10-2014-0072689 (battery module assembly, 2014.06.13): terminal portions are formed at both side end portions of a bus bar applied to a battery module constructed by stacking pouch-type secondary batteries having anode and cathode terminals both sides of which are protrudingly formed, to improve the conventional bus bar, thereby increasing the degree of freedom in design of connection of a plurality of battery modules. However, in the above-mentioned document, when the battery module is constructed using the secondary batteries each having one electrode formed at both sides thereof, the problem of the prior art that separate bus bars need to be provided in order to connect the anode cells and the cathode cells to each other is not solved, and in the prior battery module in which the electrodes are connected by the bus bars to construct the module as described above, an additional process such as welding according to the structure of the bus bars is required, and the resistance of the bus bars increases, the efficiency of the batteries is reduced, and the quality control becomes difficult.
In order to solve the above-mentioned problems, the following techniques are disclosed in korean laid-open patent publication No. 10-2014-0058058 (battery module, 2014.05.14): the anode tab and the cathode tab of the battery cell formed to protrude to the outside are cut and the plurality of stacked battery modules are connected only by the connection of the cut electrodes. However, the battery cell in the publication forms the anode tab and the cathode tab only in one direction, and thus has a limitation in expandability when connecting a plurality of battery modules, and has a structural limitation in that electrodes having the same poles should be formed adjacent to each other because one anode tab and one cathode tab are cut to form a pair of cut parts.
The conventional secondary battery as described above forms one anode electrode or cathode electrode at both sides opposite to each other, or the anode electrode and the cathode electrode are formed on one side facing the same direction, so that the structure of the battery module is limited at the time of series/parallel connection of the batteries, and thus it is difficult to apply various structures according to the layout of the vehicle.
In recent years, in a high-efficiency and large-capacity battery module for an electric vehicle, a 2P12S module in which two batteries are connected in parallel and a pair of batteries of 12 groups connected in parallel are connected in series with each other is required, and such a battery module is formed by stacking batteries having one electrode formed on opposite sides thereof in one direction, and in order to connect the pair of batteries connected in parallel and another adjacent pair of batteries in series, it is necessary to further provide a separate bus bar. When the bus bars are further provided as described above, since unnecessary contact resistance between the electrodes is increased, energy efficiency in the battery module and a consistent operation process of a connection process between the batteries cannot be achieved, resulting in a reduction in process quality of the battery module.
Documents of the prior art
Patent document
Korean laid-open patent publication No. 10-2014-0072689 (Battery Module Assembly, 2014.06.13)
Korean laid-open patent publication No. 10-2014-0058058 (Battery Module, 2014.05.14)
Disclosure of Invention
Technical problem to be solved
The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a battery having a plurality of electrodes with improved freedom of connection, and a battery module using the battery, in which a battery module is configured by only connection between electrodes without having a separate bus bar.
(II) technical scheme
The present invention relates to a battery having a plurality of electrodes and a battery module using the same, and more particularly, to a battery in which electrode terminals including an anode terminal and a cathode terminal are formed to protrude to the outside, wherein a plurality of electrode terminals selected from one or more of the anode terminal or the cathode terminal are formed at opposite sides of the battery.
Also, a plurality of anode terminals or cathode terminals having the same polarity may be respectively adjacently formed at opposite sides of the battery.
Also, a battery having a plurality of electrode terminals may be included, wherein a pair of anode and cathode terminals having different polarities are adjacently formed at opposite sides, respectively.
And, a battery having a plurality of electrode terminals may be included, characterized in that anode terminals and cathode terminals formed at opposite sides of the battery are configured to have the same pole in a length direction of the battery.
And, a battery having a plurality of electrode terminals may be included, wherein anode and cathode terminals formed at opposite sides are configured to have different poles in a length direction of the battery.
Also, a battery having a plurality of electrode terminals may be included, wherein a pair of anode terminals or cathode terminals having the same pole are adjacently formed at one side, and a pair of anode terminals and cathode terminals having different poles are adjacently formed at the other side opposite to the one side.
The present invention may further include a battery module in which two or more of the batteries are stacked, adjacent anode terminals or cathode terminals of the two or more batteries are electrically connected, and the batteries may be pouch-type secondary batteries.
At this time, the battery module is characterized in that a plurality of the anode terminals or the cathode terminals having the same polarity are respectively adjacently formed at opposite sides and a plurality of the cells connected in parallel with each other are formed in plurality and connected in series with each other.
And the battery module is characterized in that a plurality of cells, in which a pair of the anode terminals or the cathode terminals having the same polarity are respectively adjacently formed at opposite sides and connected in parallel with each other, and a pair of the anode terminals and the cathode terminals having different polarities are respectively adjacently formed at opposite sides and the anode terminals and the cathode terminals are configured such that a plurality of cells, which have different polarities in a length direction and are connected in parallel with each other, are connected in series with each other.
And, the battery module is characterized in that a plurality of cells, in which a pair of the anode terminal or the cathode terminal having the same pole is adjacently formed at one side and a pair of the anode terminal and the cathode terminal having different poles is adjacently formed at the other side opposite to the one side and connected in parallel to each other, are formed in plurality and connected in series to each other.
Further, the battery module is characterized by comprising: a battery in which a pair of the anode terminal or the cathode terminal having the same polarity is adjacently formed at opposite sides, respectively; and a pair of cells stacked on both sides in a front-rear direction of the cells to be connected in parallel with the cells, and a pair of the anode terminals or the cathode terminals having the same pole is adjacently formed on one side, a pair of the anode terminals or the cathode terminals having the same pole is adjacently formed on the other side opposite to the one side, and the cells and the pair of cells connected in parallel with each other are stacked in plurality and connected in series with each other.
(III) advantageous effects
The battery according to the present invention constructed as described above has a plurality of electrodes formed at opposite sides thereof to increase the degree of freedom in connection between the batteries, so that battery modules of various shapes can be applied according to the layout of a vehicle, and therefore, series connection/parallel connection can be achieved only by connection between the electrodes without separate bus bars, so that the resistance value based on the connection of the electrodes can be reduced, a highly efficient battery module can be developed, and a uniform operation process of the connection process between the electrodes can be achieved, and thus, the process quality of the conventional battery module can be improved.
Drawings
Fig. 1 is a perspective view showing a battery according to embodiment 1-1 of the present invention.
Fig. 2 is an exploded perspective view illustrating the battery according to fig. 1.
Fig. 3 is a perspective view showing a battery according to embodiments 1-2 of the present invention.
Fig. 4 is a perspective view showing a battery according to embodiments 1 to 3 of the present invention.
Fig. 5 is a perspective view showing a battery according to embodiments 1 to 4 of the present invention.
Fig. 6 is a perspective view showing a battery according to embodiments 1 to 5 of the present invention.
Fig. 7 is a perspective view illustrating a battery module according to embodiment 2-1 of the present invention.
Fig. 8 is a schematic view illustrating a battery module according to embodiment 2-1 of the present invention.
Fig. 9 is a perspective view illustrating a battery module according to embodiments 2-2 of the present invention.
Fig. 10 is a schematic view illustrating a battery module according to embodiments 2-2 of the present invention.
Fig. 11 is a perspective view illustrating a battery module according to embodiments 2 to 3 of the present invention.
Fig. 12 is a schematic view illustrating a battery module according to embodiments 2 to 3 of the present invention.
Fig. 13 is a perspective view illustrating a battery module according to embodiments 2 to 4 of the present invention.
Fig. 14 and 15 are schematic views illustrating battery modules according to embodiments 2 to 4 of the present invention.
Fig. 16 and 17 are explanatory views illustrating coupling between battery modules according to embodiment 2 of the present invention.
Fig. 18 to 21 are views for explaining an embodiment of the present invention in which an external bus bar is used to connect adjacent terminals.
Description of the reference numerals
1000. 2000, 3000, 4000: battery module
100. 200, 300, 400, 500: battery with a battery cell
110. 210, 310, 410, 510: anode terminal
120. 220, 320, 420, 520: cathode terminal
130. 230, 330, 430, 530: electrode assembly
140. 240, 340, 440, 540: external casing
Detailed Description
The present invention may be modified in various ways and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail. However, it is not intended to limit the present invention to the specific embodiments, but it should be understood that all modifications, equivalents, and alternatives included in the spirit and technical scope of the present invention are included in the present invention.
When a component is referred to as being "connected" or "coupled" to another component, it is to be understood that the component may be directly connected or coupled to the other component, but it may also be understood that other components may be present between the component and the other component.
Unless otherwise defined, all terms including technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Terms commonly used such as those defined in dictionaries should be interpreted as having the same meaning as that having been defined in the context of the related art, and should not be interpreted as having an ideal meaning or an excessively formal meaning unless explicitly defined in this application.
The technical idea of the present invention will be described in more detail below with reference to the accompanying drawings.
The drawings are merely one example for illustrating the technical idea of the present invention in more detail, and thus, the technical idea of the present invention is not limited to the forms in the drawings.
< example 1: battery >
< examples 1 to 1>
Fig. 1 is a perspective view illustrating a battery 100 according to embodiments 1-1 of the present invention, and fig. 2 is an exploded perspective view illustrating the battery 100 according to fig. 1, and referring to fig. 1 and 2, the battery 100 may include an anode terminal 110, a cathode terminal 120, an electrode assembly 130, and an outer case 140.
The electrode assembly 130 may be configured in such a manner that one or more anode plates and cathode plates are arranged with a separator interposed therebetween, and may be classified into a winding type in which one anode plate and one cathode plate are wound together with a separator, a stacking type in which a plurality of anode plates and a plurality of cathode plates are alternately stacked with a separator interposed therebetween, or the like. At this time, the battery 100 may be formed as a primary battery or a secondary battery of a dry cell type or an assembled type, and preferably, may be formed as a pouch-type laminated secondary battery in which the anode terminal 110 and the cathode terminal 120 are formed on both side surfaces facing each other in the left-right direction in a state of being erected in the up-down direction.
In addition, the outer case 140 may be configured to include an outer insulating layer, a metal layer, and an inner adhesive layer to accommodate the electrode assembly 130 and internal components such as an electrolyte. At this time, in order to improve the supplementary property, the heat dissipation property, and the like based on the electrical and chemical properties of the electrode assembly 130 and the electrolyte, a metal thin film in the form of aluminum may be interposed between an insulating layer and an inner adhesive layer and disposed at both sides of the electrode assembly 130 in the lamination direction to accommodate the electrode assembly 130, and a sealing part may be provided on the outer circumferential surface of the outer case 140 to seal the outer case 140 accommodating the electrode assembly 130. Further, at least one of the outer cases 140 may be protrudingly formed in a recessed shape in the lamination direction of the electrode assembly 130.
In addition, electrode tabs are provided at the respective electrode plates of the electrode assembly 130, and one or more electrode tabs are connected to the respective anode and cathode plates, interposed between the sealing parts of the outer case 140, and formed to protrude to the outside, thereby functioning as electrode terminals of the battery 100. In addition, a plurality of electrode tabs 111 and 121, to which the anode plates or the cathode plates are respectively connected, are formed on one surface of the electrode assembly 130 on which the electrode terminals are formed, so that the anode terminal 110 and the cathode terminal 120 are formed to protrude outward of the outer case 140 in the longitudinal direction in the battery 100, and a plurality of one or more selected from the anode terminal 110 or the cathode terminal 120 are formed at opposite sides.
More specifically, in the battery 100 according to the embodiment 1-1 of the present invention, the anode plate in which the anode electrode tab 111 is adjacently formed at one side in the longitudinal direction and the cathode plate in which the cathode electrode tab 121 is adjacently formed at one side in the longitudinal direction are stacked on each other, and at this time, the anode electrode tab 111 of the anode plate and the cathode electrode tab 121 of the cathode plate are stacked to face in the direction opposite to each other in the longitudinal direction, so that a pair of the anode terminals 110 or the cathode terminals 120 having the same polarity are adjacently formed, and therefore, a pair of the anode terminals 110 is formed at one side in the longitudinal direction and a pair of the cathode terminals 120 is formed at the other side.
In addition, three or more pluralities of the anode terminal 110 and the cathode terminal 120 may be formed on both opposite sides of the battery 100 as needed, and unnecessary electrode terminals may be removed when designing a battery module constructed by stacking the batteries 100, but it is preferable that a pair of the electrode terminals 110, 120 are formed on both opposite sides, respectively, so as not to form unnecessary electrode terminals when connecting the batteries 100, with a high degree of freedom.
< examples 1 and 2>
Fig. 3 is a perspective view showing a battery 200 according to embodiments 1-2 of the present invention, and as shown in fig. 3, in the battery 200 according to embodiments 1-2 of the present invention, a pair of the anode terminal 210 and the cathode terminal 220 having different polarities are adjacently formed at opposite sides, respectively, and are configured to have the same polarity at opposite sides in a length direction.
At this time, in the battery 200, the anode plate and the cathode plate, which form a pair of electrode tabs at opposite sides in the length direction, are laminated to each other, and the respective anode electrode tabs and cathode electrode tabs, which may be laminated to be formed at the anode plate and the cathode plate, do not interfere with each other in the lamination direction.
< examples 1 to 3>
Fig. 4 is a perspective view illustrating a battery 300 according to embodiments 1 to 3 of the present invention, and referring to fig. 4, in the battery 300 according to embodiments 1 to 3 of the present invention, a pair of the anode terminal 310 and the cathode terminal 320 having different polarities are respectively adjacently formed at opposite sides, and may be configured to have different polarities at opposite sides in a length direction of the battery 300.
At this time, in the battery 300, the anode plate and the cathode plate, which form a pair of electrode tabs opposing in the corner direction on the electrode plate of a quadrangular shape, are laminated with each other, and at this time, it is preferable that the laminated anode electrode tab and cathode electrode tab are arranged so as not to interfere with each other in the lamination direction.
< examples 1 to 4, 1 to 5>
Fig. 5 is a perspective view illustrating a battery 400 according to embodiments 1 to 4 of the present invention, and fig. 6 is a perspective view illustrating a battery 500 according to embodiments 1 to 5 of the present invention, and in the batteries 400 and 500 according to embodiments 1 to 4 and 1 to 5 of the present invention, a pair of the anode terminal 410 and 510 or the cathode terminal 520 and 520 having the same pole may be adjacently formed at one side, and a pair of the anode terminal 410 and 510 and the cathode terminal 420 and 520 having different poles may be adjacently formed at the other side opposite to the one side, to constitute the batteries 400 and 500. At this time, the batteries 400 and 500 may be manufactured by forming a plurality of electrode tabs on one electrode plate and laminating them, thereby forming a plurality of terminals by arranging the respective anode terminals 410 and 510 or cathode terminals 420 and 520 or the electrode tabs of the electrode plate forming at least one electrode tab in a direction in which the electrode tab protrudes.
In addition, as shown in fig. 5, in the battery 400 according to the embodiments 1 to 4, a pair of anode terminals 410 are formed at one side, and one anode terminal 410 and one cathode terminal 420 are formed at the opposite other side in the length direction to form a pair. The battery 400 according to the above-described configuration has three anode terminals 410, so that the degree of freedom of connection with other batteries adjacently stacked can be increased.
In addition, as shown in fig. 6, in the battery 500 according to the embodiments 1 to 5, a pair of cathode terminals 520 are formed at one side in the length direction, and one anode terminal 510 and cathode terminal 520 are formed at the opposite other side to form a pair. At this time, the battery 500 according to the above-described configuration has three cathode terminals 520, so that the degree of freedom of connection with other batteries adjacently stacked can be increased.
In addition, the battery cell arranged with a plurality of electrode terminals according to various embodiments of the present invention may be stacked in plurality to constitute one battery module, and the battery cell having various arrangements may be used according to the performance required for the respective battery modules. At this time, the batteries having various directions or arrangements of the electrode terminals may be used for the batteries according to the number, capacity, and the like of the batteries required for a battery module configured by connecting adjacent batteries in series or in parallel, thereby having a high degree of freedom in designing the batteries according to the layout of a vehicle when designing the battery module.
< example 2: battery Module >
Next, description will be made of battery modules 1000, 2000, 3000, 4000 in which the batteries 100, 200, 300, 400, 500 according to various embodiments of the present invention are stacked into one module.
In addition, as shown in fig. 7, the battery 100 according to the above-described configuration may stack at least two or more batteries 100 to constitute a battery module 1000 in which the anode terminals 110 or the cathode terminals 120 of the adjacent batteries 100 are electrically connected. On the other hand, in a configuration in which the battery 100 is erected perpendicular to the ground such that the wide surface of the battery 100 faces the front and rear, the electrode terminals of the battery 100 are formed on both sides in the left-right direction, the direction of the batteries stacked and arranged in the front-rear direction is set as the y axis, the longitudinal direction of the left and right sides of the battery 100 is set as the x axis, and the height direction in which the electrode terminals 110 and 120 are adjacently disposed on both the left and right sides of the battery 100 is set as the z axis.
Referring to fig. 7, the battery modules 1000 may be arranged such that the wide surfaces of the batteries 100 in the y-axis direction face each other to form one battery module 1000. At this time, in the battery module 1000, the anode terminal 110 or the cathode terminal 120 are electrically connected, so that the constitution of the various batteries 100 in the same direction can be modularized without using a separate bus bar. At this time, as shown in fig. 7, for the electrical connection of the anode terminal 110 and the cathode terminal 120, the respective electrode terminals 110, 120 are bent to contact the electrode terminals 110, 120 of another battery 100 adjacently disposed, so that the respective batteries 100 can be electrically connected, and the contacted electrode terminals 110, 120 can also protect unnecessary contact between electrodes and damage caused by the outside by welding or including a protective case (not shown) surrounding the battery module 1000.
In the battery module 1000 according to the present invention having the above-described configuration, the plurality of electrode terminals 110 and 120 are formed at opposite sides, so that the direction of lamination, the shape of the battery module, and the degree of freedom of connection between the electrodes when designing the battery module 1000 can be improved, and the battery module 1000 according to the present invention can be configured by pouch-type secondary batteries manufactured in various shapes, as compared to a prismatic battery having a constant shape, so that it can be configured in various shapes according to the layout of a vehicle.
In addition, in the battery module 1000 of the present invention, a plurality of anode terminals 110 and cathode terminals 120 are formed in opposite directions so that the batteries 100 may be connected in series or in parallel in one direction to constitute the battery module 1000, and as needed, the batteries 100 may be stacked in the x-axis direction to form the battery module 1000, in which case the anode terminals 110 or the cathode terminals 120 of the batteries 100 connected in the x-axis direction may be bent at a predetermined angle in the y-axis direction to a direction corresponding to each other and connected, in which case the angle at which the electrode terminals 110, 120 are bent depends on the thickness of the electrode terminals 110, 120 and the arrangement of the batteries 100.
In addition, in the battery module 1000, the anode terminal 110 and the cathode terminal 120 formed at both side surfaces of the battery 100 are connected in series or in parallel according to the shape of the electrode terminals 110, 120 arranged in the battery 100 to form the battery module 1000, and the battery module 1000 may be constructed according to various combinations of the batteries 100 of the embodiments of the present invention according to the design conditions of the battery module 1000.
< example 2-1>
Next, in an embodiment of the present invention, a battery module for manufacturing a 2P12S module required in recent electric vehicles of high efficiency and large capacity is proposed, the 2P12S module being formed by connecting 2 batteries in parallel and connecting 12 sets of a pair of batteries connected in parallel to each other in series. In this case, the battery module may be formed in various types according to the arrangement and combination of the anode terminal and the cathode terminal formed at opposite sides of the battery, and hereinafter, a detailed description will be given of a battery module in which two batteries are connected in parallel and a pair of batteries connected in parallel are connected in series with each other.
Figure 7 is a perspective view illustrating a portion of a battery module 1000 according to embodiment 2-1 of the present invention, fig. 8 is a schematic view illustrating a portion of a battery module 1000 according to embodiment 2-1 of the present invention, and referring to fig. 7 and 8, in the battery module 1000, a pair of the anode terminal 110 or the cathode terminal 120 having the same polarity is adjacently formed at opposite sides, respectively, and a pair of the cells 100a connected in parallel with each other is connected in series with another adjacent pair of the cells 100b to form the battery module 1000, and it is shown in the drawing that two of the batteries 100a are connected in parallel and 3 sets of the batteries 100a connected in parallel are connected in series with each other, however, the present invention is not limited to the number of the batteries connected, preferably, the battery module 1000 is configured by stacking a plurality of cells without departing from the gist of the present invention.
At this time, in order to connect the pair of batteries 100a connected in parallel to each other in series with the other pair of batteries 100a adjacent thereto, the other pair of batteries 100b arranged adjacent thereto is rotated in the longitudinal direction (x axis) with reference to the thickness direction (y axis) to reverse the direction of the electrodes so that the directions of the electrodes connected in series are the same, whereby the battery module 1000 stacked in one direction can be configured. At this time, as described above, when the battery 100b is rotated in the length direction (x-axis) to realize inversion for series connection, although the stacking direction of the anode plate and the cathode plate according to the stacking direction is not inverted, when the battery 100b is rotated in the thickness direction (y-axis) with the length direction (x-axis) as a reference, the stacking direction of the anode plate and the cathode plate is inverted, thereby possibly causing problems in performance and safety. More specifically, when the stacking direction of the anode plate and the cathode plate is changed, the moving path of the negative charge moving inside the battery may be changed, and thus it is necessary to manufacture the anode plate and the cathode plate to be completely symmetrical to each other, and a poor separator interposed between the anode plate and the cathode plate may be caused, which may cause a problem directly related to an explosion accident of the battery.
In addition, as shown in fig. 8, in constructing the battery module 1000, when connecting in series with another adjacent pair of batteries 100a, the connection of one anode plate and cathode plate is sufficient, and therefore, it is preferable to cut unnecessary anode terminals 110 and cathode terminals 120 that are not used, or to put a protective cover over the unnecessary terminals, to construct the battery module 1000.
< examples 2 to 2>
Fig. 9 is a perspective view illustrating a portion of a battery module 2000 according to a 2 nd to 2 nd embodiment of the present invention, fig. 10 is a schematic view illustrating a portion of a battery module 2000 according to a 2 nd to 2 nd embodiment of the present invention, and referring to fig. 9 and 10, in the battery module 2000 according to the 2 nd to 2 nd embodiment of the present invention, a pair of cells 100 connected in parallel with each other is connected in series with another pair of cells 300 connected in parallel with each other to constitute the battery module 1000, wherein a pair of the anode terminal 110 or the cathode terminal 120 having the same polarity is respectively adjacently formed at opposite sides of the pair of cells 100, a pair of the anode terminal 310 and the cathode terminal 320 having different polarities is respectively adjacently formed at opposite sides of the other pair of cells 300, and the anode terminal 310 and the cathode terminal 320 are configured to have different polarities in a length direction, this has an advantage in that it is not necessary to reverse the direction of the batteries 100 and 300 in order to match the direction between the electrode terminals 310 and 320 of another pair of batteries 300 connected in series with the pair of batteries 100.
< examples 2 to 3>
In the above-described 2-1 st and 2-2 nd embodiments, one battery module is constituted by the lamination of a plurality of cells, and at this time, the electrode that is not connected to the adjacent cell in the end portion of the cell in the lamination direction (y-axis) has a function of an external terminal for connection in a direction different from the lamination direction (y) of the cell. At this time, the battery module forms terminals having the same poles at both ends in the stacking direction (y-axis), and forms electrodes having different poles in the longitudinal direction (x-axis) of the battery. At this time, the battery modules 1000 and 2000 according to the embodiments 2-1 and 2-2 are easily connected in parallel in the longitudinal direction (x-axis, refer to fig. 16) of the battery, but since the same terminals face the same direction when series connection of different poles is required, it is necessary to cut or insulate one terminal.
In order to solve the above-described problems, a battery module in which external terminals having the same poles are formed in the longitudinal direction (x-axis) of the battery is proposed.
Fig. 11 is a perspective view illustrating a battery module according to embodiments 2 to 3 of the present invention, fig. 12 is a schematic view illustrating the battery module according to embodiments 2 to 3 of the present invention, and referring to fig. 11 and 12, in a battery module 3000 according to embodiments 2 to 3 of the present invention, a pair of the anode terminal 510 or the cathode terminal 520 having the same pole is adjacently formed at one side and a pair of the anode terminal 510 and the cathode terminal 520 having different poles is adjacently formed at the other side opposite to the one side in a length direction and a pair of batteries 400, 500 connected in parallel with each other may be connected in series with the other adjacent pair of batteries 400, 500, in which case, the batteries 400, 500 may be configured to have one electrode terminal 420, 510 having different polarities, respectively, electrode terminals having the same polarity may be configured in directions corresponding to each other, and electrode terminals having different polarities are also disposed between the other pair of batteries 400 and 500 connected in series, so that a uniform modularization process can be achieved.
< examples 2 to 4>
As another aspect of the present invention, a battery module 4000 in which 3 batteries are connected in parallel and 8 sets of 3 batteries connected in parallel are connected in series to constitute 3P8S is proposed below.
Fig. 13 is a perspective view illustrating a battery module according to embodiments 2 to 4 of the present invention, fig. 14 and 15 are schematic views illustrating a battery module according to embodiments 2 to 4 of the present invention, and referring to fig. 13 to 15, a battery module 4000 according to embodiments 2 to 4 of the present invention includes: a battery 100 in which a pair of the anode terminal 110 or the cathode terminal 120 having the same polarity is adjacently formed on both sides opposite to each other in the longitudinal direction; and a pair of batteries 400, 500 stacked on both sides in a stacking direction of the batteries 100 to be connected in parallel with the batteries 100, and forming a pair of the anode terminals 410, 510 or the cathode terminals 420, 520 having the same pole adjacent on one side, forming a pair of the anode terminals 410, 510 and the cathode terminals 420, 520 having different poles adjacent on the other side opposite to the one side, the batteries 100 and the pair of batteries 400, 500 connected in parallel with each other being stacked in plural and connected in series with each other to constitute the battery module 4000.
At this time, the battery module 4000 may be configured as a battery module 4000a in which batteries are connected in parallel in the order of 500-. The external terminals of the battery modules 3000, 4000 according to the 2 nd to 3 nd and 2 nd to 4 th embodiments form different poles at both ends of the stacking direction (y-axis), so that it is necessary to reverse the stacking direction of the anode plate and the cathode plate in order to reverse the poles of the external terminals, and thus, two battery modules 4000a, 4000b in which the electrode direction of the external terminals is reversed can be manufactured by changing the order of the respective batteries 400, 500 connected in parallel.
In addition, the battery module of the present invention may be formed in a form in which a plurality of cells connected in parallel are connected in series to form one battery module, instead of the above-described battery module of 2P12S, more specifically, at least two or more cells are stacked, adjacent anode terminals or cathode terminals having the same polarity, respectively, are connected in parallel, the at least two or more cells connected in parallel are stacked in plurality, and the at least two or more cells connected in parallel and another at least two or more cells stacked adjacent thereto are connected in series with their adjacent anode terminals and cathode terminals, respectively, thereby forming battery modules of various specifications.
Fig. 16 and 17 are examples illustrating the coupling between the battery modules according to embodiment 2 of the present invention, and fig. 16 illustrates the series connection and the parallel connection in the stacking direction (y-axis) and the length direction (x-axis) of the batteries in the battery module in which the electrode terminals constituting the external electrodes formed at both end portions in the stacking direction of the batteries according to embodiments 2 to 4 of the present invention have different poles. At this time, the battery may be stacked in plurality in the Y-axis direction to form a plurality of battery modules 4000a, and the respective battery modules 4000a are stacked adjacently in the X-axis or Y-axis direction to constitute one battery module.
< part A >
Part a of fig. 16 shows that the battery modules 4000a are connected in series in the stacking direction of the cells, wherein the battery modules 4000a may be connected in series with another battery module 4000a stacked adjacent to each other in the Y-axis direction by connecting the anode terminal 410 and the cathode terminal 520 having different polarities.
< part B >
Part B of fig. 16 shows that the battery modules 4000a are connected in series in the length direction (X-axis) of the battery, wherein the battery modules 4000a may be connected in series with another battery module 4000B stacked adjacent in the X-axis direction by connecting the anode terminal 410 and the cathode terminal 520 having different polarities. At this time, the battery module 4000a is constructed by connecting the batteries in parallel in the order of 500-.
< part C >
Part C of fig. 16 shows a view in which the battery modules 4000a are connected in parallel in the stacking direction of the cells, wherein the battery module 4000a may be connected in parallel with another battery module 4000a stacked adjacent in the Y-axis direction by connecting the anode terminal 410 and the cathode terminal 520 having the same polarity.
As described above, the battery module constituted by the combination of the batteries of the present invention can implement various changes according to design specifications, and can achieve free connection in the length direction and the thickness direction of the battery module.
The present invention is not limited to the above-described embodiments, and can be applied to various ranges, and various changes can be made without departing from the gist of the present invention claimed in the claims.
In the case where direct connection between the electrode terminals is difficult, as needed, the batteries may be connected in series and in parallel using external bus bars, the electrode terminals of the batteries constituting the battery module may be connected by using a separate conductive member (buss bar) as a medium, and the connection between the electrode terminals of the batteries of the present invention may be variously modified without departing from the spirit of the present invention, as shown in fig. 18 to 21.
At this time, the battery of the present invention has a plurality of electrode terminals, so that the batteries for series connection are reversed in the height direction and connected in series by the contact between the adjacent electrode terminals as shown in fig. 19 (b), 20 (b) and 21 (b), thereby having an advantage that the connection between the adjacent electrode terminals can be connected without a separate bus bar.
Claims (11)
1. A battery in which an electrode terminal including an anode terminal and a cathode terminal is formed to protrude to the outside,
a plurality of electrode terminals selected from one or more of the anode terminal or the cathode terminal are formed at opposite sides of the battery.
2. The battery according to claim 1,
a plurality of anode terminals or cathode terminals having the same polarity are respectively adjacently formed at opposite sides of the battery.
3. The battery according to claim 1,
a pair of anode and cathode terminals having different polarities are respectively adjacently formed at opposite sides of the battery.
4. The battery according to claim 3,
the anode terminal and the cathode terminal formed at opposite sides of the battery are configured to have different poles in a length direction of the battery.
5. The battery according to claim 3,
the anode terminal and the cathode terminal formed at opposite sides of the battery are configured to have the same polarity in a length direction of the battery.
6. The battery according to claim 1,
a pair of anode terminals or cathode terminals having the same pole are adjacently formed at one side of the battery,
a pair of an anode terminal and a cathode terminal having different poles are formed adjacent to the other side opposite to the one side.
7. A battery module using the battery according to any one of claims 2 to 6,
two or more of the cells are stacked to form,
and adjacent anode terminals or cathode terminals of two or more of the cells are electrically connected.
8. The battery module according to claim 7,
in the battery module, a plurality of anode terminals or cathode terminals having the same polarity are respectively adjacently formed at opposite sides and a plurality of cells connected in parallel with each other are formed in plurality and connected in series with each other.
9. The battery module according to claim 7,
in the battery module, a plurality of cells, in which a pair of the anode terminal or the cathode terminal having the same polarity is respectively adjacently formed at opposite sides and connected in parallel with each other, and a pair of the anode terminal and the cathode terminal having different polarities is respectively adjacently formed at opposite sides and the anode terminal and the cathode terminal are configured such that a plurality of cells, which have different polarities in a length direction and are connected in parallel with each other, are connected in series with each other.
10. The battery module according to claim 7,
in the battery module, a pair of the anode terminal or the cathode terminal having the same pole is adjacently formed at one side and a pair of the anode terminal and the cathode terminal having different poles is adjacently formed at the other side opposite to the one side and a plurality of cells connected in parallel to each other are formed in plurality and connected in series to each other.
11. The battery module according to claim 7,
the battery module includes:
a battery in which a pair of the anode terminal or the cathode terminal having the same polarity is adjacently formed at opposite sides, respectively; and
a pair of cells stacked on both sides in a front-rear direction of the cells to be connected in parallel with the cells, and having a pair of the anode terminal or the cathode terminal having the same pole formed adjacent to one side and a pair of the anode terminal and the cathode terminal having different poles formed adjacent to the other side opposite to the one side,
the battery and the pair of batteries connected in parallel with each other are stacked in plurality and connected in series with each other.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2018-0070373 | 2018-06-19 | ||
| KR20180070373 | 2018-06-19 |
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| CN201910532116.2A Pending CN110620209A (en) | 2018-06-19 | 2019-06-19 | Battery having a plurality of electrodes and battery module using the same |
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| CN (1) | CN110620209A (en) |
Cited By (1)
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| CN114204096A (en) * | 2020-09-18 | 2022-03-18 | 泰星能源解决方案有限公司 | Secondary battery |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20220042683A (en) * | 2020-09-28 | 2022-04-05 | 주식회사 엘지에너지솔루션 | Battery cell including electrode tabs on which stress relief portions are formed |
| KR20240009718A (en) * | 2022-07-14 | 2024-01-23 | 주식회사 엘지에너지솔루션 | Battery module, battery pack and vehicle including the battery module |
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| KR101782984B1 (en) * | 2014-03-19 | 2017-09-28 | 주식회사 엘지화학 | Battery Module Comprising Battery Cells or Unit Modules Having Multi- Directional Connection Structure |
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- 2019-06-19 CN CN201910532116.2A patent/CN110620209A/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20190143407A (en) | 2019-12-30 |
| KR102295756B1 (en) | 2021-09-01 |
| KR20210109494A (en) | 2021-09-06 |
| KR102539569B1 (en) | 2023-06-05 |
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Effective date of registration: 20220706 Address after: Seoul, South Kerean Applicant after: Sk new energy Co.,Ltd. Address before: Seoul, South Kerean Applicant before: SK INNOVATION Co.,Ltd. |