CN116487715A - Array type battery cell, top cover and lithium battery - Google Patents

Array type battery cell, top cover and lithium battery Download PDF

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Publication number
CN116487715A
CN116487715A CN202310467631.3A CN202310467631A CN116487715A CN 116487715 A CN116487715 A CN 116487715A CN 202310467631 A CN202310467631 A CN 202310467631A CN 116487715 A CN116487715 A CN 116487715A
Authority
CN
China
Prior art keywords
core
array
cell
welded
battery cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202310467631.3A
Other languages
Chinese (zh)
Inventor
杨恒峰
蒋治亿
占莎
霍涛涛
冯群翔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trina Energy Storage Solutions Jiangsu Co Ltd
Original Assignee
Trina Energy Storage Solutions Jiangsu Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Trina Energy Storage Solutions Jiangsu Co Ltd filed Critical Trina Energy Storage Solutions Jiangsu Co Ltd
Priority to CN202310467631.3A priority Critical patent/CN116487715A/en
Publication of CN116487715A publication Critical patent/CN116487715A/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • H01M10/0431—Cells with wound or folded electrodes
    • 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
    • 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
    • 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
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic 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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • 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)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The invention provides an array type battery cell, which comprises: a cell body; the battery cell body is composed of two or more core packages. Two or more core packages are arranged in the single battery cell, and the manufacturing process of each core package is unchanged, so that the industrialization difficulty is reduced as a whole, and the capacity of the single battery cell is improved.

Description

Array type battery cell, top cover and lithium battery
Technical Field
The invention relates to the field of lithium batteries, in particular to an array type battery cell, a top cover and a lithium battery.
Background
With the increasing popularity of energy storage markets, energy storage cell products are evolving towards large capacities. The use of the high-capacity battery cell can reduce the use amount of PACK end parts and improve the volume energy density; the high-capacity battery cells can realize high capacity by using fewer battery cells, the parallel connection number is reduced, the BMS difficulty is reduced, the integrated assembly process of the energy storage system is simplified by the application of the high-capacity battery cells, and the investment of cost of land infrastructure, containers and the like can be greatly saved, so that the cost is further reduced.
In the prior art, two schemes for improving the capacity of the battery cell are mainly adopted, one scheme is to use a lamination process for manufacturing, so that the problem of C angle is solved, the corner space of a shell can be fully utilized, and the capacity of the battery cell is improved; alternatively, a winding process is used to make the cell wide in width and thickness, increasing the core capacity.
Aiming at the lamination process, the lamination large-cell process has a series of disadvantages of short development time, insufficient industrial matching maturity, low equipment efficiency, high single GWh investment, low automatic production yield and the like, so that the production cost is high and the industrial production cannot be realized.
The scheme for expanding the width and the thickness is limited by the prior production equipment and winding technology in the actual production process, the expansion in the width is difficult to realize, industrial production cannot be realized, and in addition, the expansion in the thickness and the width can aggravate the heating of the battery cell and can influence the service life, the safety, the efficiency and the like of the battery cell.
The above problems are currently in need of solution.
Disclosure of Invention
The invention aims to provide an array type battery cell, a top cover and a lithium battery.
In order to solve the above technical problems, the present invention provides an array type battery cell, including: a cell body;
the battery cell body is composed of two or more core packages.
Further, two or more of the core wrap are disposed along a first directional array of core wrap.
Further, two or more of the core wrap are disposed along a second directional array of core wrap.
Further, two or more of the core wrap are arranged in an array along a first direction and a second direction of the core wrap.
Further, in the core pack in the first direction, two adjacent tabs with the same polarity of the core pack are welded through the first connecting piece.
Further, the first connecting piece is welded on the tab through ultrasonic welding.
Further, in the core pack in the second direction, the polarities of adjacent tabs of two adjacent core packs are the same, and welding is performed through the second connecting sheet.
Further, the second connecting piece is welded on the tab through ultrasonic welding.
Further, each second connecting piece is welded with a pole, and two or more poles are arranged at intervals in polarity.
Further, the pole is welded on the second connecting piece through laser welding.
The invention also provides a top cover which is matched with the array type battery cell;
one or more liquid injection holes and one or more explosion-proof valves are formed in the top cover.
The invention also provides a lithium battery, comprising: the top cover, the aluminum shell and the array type battery cell;
the array type battery cell is arranged in the aluminum shell;
the top cover covers the aluminum shell.
The beneficial effects of the invention are as follows: the invention provides an array type battery cell, which comprises: a cell body; the battery cell body is composed of two or more core packages. Two or more core packages are arranged in the single battery cell, and the manufacturing process of each core package is unchanged, so that the industrialization difficulty is reduced as a whole, and the capacity of the single battery cell is improved.
Drawings
The invention will be further described with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of an array-type battery cell according to an embodiment of the present invention when the array-type battery cell is unfolded.
Fig. 2 is a schematic structural diagram of a welding post when an array type battery cell is unfolded according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an array type battery cell and a top cover according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of another array type battery cell and a top cover according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of a top cover according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a lithium battery according to an embodiment of the present invention.
In the figure: 100. a cell body; 110. a core pack; 111. a tab; 112. a first connecting piece; 113. a second connecting piece; 114. a pole; 200. a top cover; 210. a liquid injection hole; 220. an explosion-proof valve; 300. an aluminum shell.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
Referring to fig. 1-2, an array type cell is provided in this embodiment, which includes: a cell body 100; the cell body 100 is composed of two or more core packs 110. Two or more core packages 110 are arranged in the single battery cell, and the manufacturing process of each core package 110 is unchanged, so that the industrialization difficulty is reduced as a whole, and the capacity of the single battery cell is improved.
In this embodiment, two or more of the core packs 110 are arranged in an array along a first direction of the core pack 110. The first direction refers to the width direction of the top surface of the core pack 110 where the tab 111 is disposed, as shown in F1 of fig. 1.
In this embodiment, in the core pack 110 in the first direction, the tabs 111 of two adjacent core packs 110 having the same polarity are welded by the first connecting tab 112.
Specifically, the first connection tab 112 is welded to the tab 111 by ultrasonic welding;
in this embodiment, the two tabs 111 of one of the core packets 110 are welded with the posts 114, and the posts 114 are welded to the tabs 111 by laser welding.
In embodiment 2, the present embodiment provides an array type cell having the same structure as that of embodiment 1, except that the arrangement direction of the core pack 110 is different from that of embodiment 1, and the other structures are the same as those of embodiment 1.
In this embodiment, two or more of the core packs 110 are arranged in an array along the second direction of the core pack 110. The second direction refers to the length direction of the top surface of the core pack 110 where the tab 111 is disposed, as shown in F2 in fig. 1.
In this embodiment, in the core pack 110 in the second direction, the adjacent tabs 111 of two adjacent core packs 110 have the same polarity, and are welded by the second connection piece 113.
Specifically, the second connection piece 113 is welded to the tab 111 by ultrasonic welding.
In this embodiment, each of the second connection pieces 113 is welded with a pole 114, and two or more poles 114 are disposed at a polarity interval.
The pole 114 is welded to the second connecting piece 113 by laser welding.
The tabs 111 on the core pack 110 at both ends are directly welded to the pole 114.
In embodiment 3, referring to fig. 1-2, the present embodiment provides an array-type battery cell having the same structure as that of embodiment 1, except that the arrangement direction of the core pack 110 is different from that of embodiment 1, and the other structures are the same as that of embodiment 1.
In this embodiment, two or more of the core packs 110 are arranged in an array along the first and second directions of the core pack 110.
In this embodiment, in the core pack 110 in the first direction, the tabs 111 of two adjacent core packs 110 having the same polarity are welded by the first connecting tab 112.
Wherein the first connection tab 112 is welded to the tab 111 by ultrasonic welding.
In this embodiment, in the core pack 110 in the second direction, the adjacent tabs 111 of two adjacent core packs 110 have the same polarity, and are welded by the second connection piece 113.
Wherein the second connecting piece 113 is welded to the tab 111 by ultrasonic welding.
In this embodiment, each of the second connection pieces 113 is welded with a pole 114, and two or more poles 114 are disposed at a polarity interval.
The pole 114 is welded to the second connecting piece 113 by laser welding.
For example: in fig. 1, 4 core packs 110 are used to expand in width and thickness to increase capacity.
Embodiment 4 referring to fig. 3-5, the present embodiment provides a top cap 200, wherein the top cap 200 is adapted to the array type battery cells provided in embodiments 1-3; one or more liquid injection holes and one or more explosion-proof valves are formed in the top cover.
Preferably, the top cover 200 is provided with two or more filling holes 210 and the same number of explosion-proof valves 220 as the filling holes 210.
Specifically, when n core bags 110 are expanded in the width direction, two or more injection holes 210, two or more explosion-proof valves 220 are provided on the top cover 200, the injection holes 210 and the explosion-proof valves 220 are arranged at intervals, and the number of the poles 114 on the top cover 200 is n+1.
Embodiment 5, referring to fig. 6, the present embodiment provides a lithium battery, including: top cap 200, aluminum can 300, and array cells as provided in examples 1-3; the array type battery cell is arranged in the aluminum shell 300; the top cover 200 is covered on the aluminum case 300.
The invention provides an array type battery cell, which comprises: a cell body 100; the cell body 100 is composed of two or more core packs 110. Two or more core packages 110 are arranged in the single battery cell, and the manufacturing process of each core package 110 is unchanged, so that the industrialization difficulty is reduced as a whole, and the capacity of the single battery cell is improved.
The components (components not illustrating specific structures) selected in the application are all common standard components or components known to those skilled in the art, and the structures and principles of the components are all known to those skilled in the art through technical manuals or through routine experimental methods. Moreover, the software programs referred to in the present application are all prior art, and the present application does not relate to any improvement of the software programs.
In the description of embodiments of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.

Claims (12)

1. An array type cell, comprising: a cell body;
the battery cell body is composed of two or more core packages.
2. The array cell of claim 1,
two or more of the core wrap are arranged in an array along a first direction of the core wrap.
3. The array cell of claim 1,
two or more of the core packs are arranged in an array along a second direction of the core pack.
4. The array cell of claim 1,
two or more of the core packs are arranged in an array along a first direction and a second direction of the core pack.
5. The array cell of claim 2 or 4,
in the core package in the first direction, two adjacent tabs with the same polarity of the core package are welded through a first connecting sheet.
6. The array cell of claim 5,
the first connecting sheet is welded on the tab through ultrasonic welding.
7. The array cell of claim 3 or 4,
in the core package in the second direction, the polarities of adjacent lugs of two adjacent core packages are the same, and the adjacent lugs are welded through the second connecting sheet.
8. The array cell of claim 7,
the second connecting sheet is welded on the tab through ultrasonic welding.
9. The array cell of claim 8,
and each second connecting sheet is welded with a pole, and two or more poles are arranged at intervals.
10. The array cell of claim 7,
the pole is welded on the second connecting sheet through laser welding.
11. A top cap adapted to the array cell of any one of claims 1-10;
one or more liquid injection holes and one or more explosion-proof valves are formed in the top cover.
12. A lithium battery, comprising: top cap, aluminum case, array cell of any of claims 1-10;
the array type battery cell is arranged in the aluminum shell;
the top cover covers the aluminum shell.
CN202310467631.3A 2023-04-27 2023-04-27 Array type battery cell, top cover and lithium battery Withdrawn CN116487715A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310467631.3A CN116487715A (en) 2023-04-27 2023-04-27 Array type battery cell, top cover and lithium battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310467631.3A CN116487715A (en) 2023-04-27 2023-04-27 Array type battery cell, top cover and lithium battery

Publications (1)

Publication Number Publication Date
CN116487715A true CN116487715A (en) 2023-07-25

Family

ID=87217531

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310467631.3A Withdrawn CN116487715A (en) 2023-04-27 2023-04-27 Array type battery cell, top cover and lithium battery

Country Status (1)

Country Link
CN (1) CN116487715A (en)

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Application publication date: 20230725