CN110828710A - Battery and battery manufacturing method - Google Patents
Battery and battery manufacturing method Download PDFInfo
- Publication number
- CN110828710A CN110828710A CN201911021358.1A CN201911021358A CN110828710A CN 110828710 A CN110828710 A CN 110828710A CN 201911021358 A CN201911021358 A CN 201911021358A CN 110828710 A CN110828710 A CN 110828710A
- Authority
- CN
- China
- Prior art keywords
- battery
- buffer structure
- electric core
- pole piece
- injection molding
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000004804 winding Methods 0.000 claims abstract description 18
- 210000005056 cell body Anatomy 0.000 claims abstract description 16
- 210000004027 cell Anatomy 0.000 claims abstract description 14
- 238000001746 injection moulding Methods 0.000 claims description 21
- 239000004033 plastic Substances 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 239000008358 core component Substances 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000002991 molded plastic Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 10
- 230000003139 buffering effect Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
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
- 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
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- 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 discloses a battery, which comprises a battery core assembly and a shell, wherein the battery core assembly comprises a battery core body and a buffer structure; the battery cell body comprises a battery cell winding body and a lug, the lug is electrically connected with the battery cell winding body, a pole piece is connected onto the lug, and a buffer structure wraps the connection part of the pole piece and the lug; the electric core assembly is positioned in the shell; the battery provided by the invention can effectively improve the condition that the pole piece is easy to fall off when the battery is impacted, and the invention also provides a battery manufacturing method.
Description
Technical Field
The invention relates to the field of batteries, in particular to a battery and a battery manufacturing method.
Background
In the prior polymer battery production process, a plurality of layers of materials are usually adopted to be wound into a winding body, then a sealing edge is used for wrapping the winding body, and the tabs of the positive electrode and the negative electrode are connected to the sealing edge, so that the positive electrode and the negative electrode on the sealing edge are easy to break when the winding body is subjected to external impact.
Therefore, the prior art provides a battery, a PCB of the battery and an electric core component are integrated, an injection molding layer is used for all-around wrapping and leading out a connecting wire, and plastic can not fully fill each gap in the injection molding process due to the blocking of the PCB, so that positive and negative pole pieces can not be fully protected, and can still easily fall off when being impacted by external force.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the battery provided by the invention can effectively protect the positive and negative pole pieces when the electric core component is impacted, and prevent the pole pieces from falling off.
According to one aspect of the invention, a battery is provided, which comprises a cell assembly and a shell, wherein the cell assembly comprises a cell body and a buffer structure; the battery cell body comprises a battery cell winding body and a lug, the lug is electrically connected with the battery cell winding body, a pole piece is connected onto the lug, and a buffer structure wraps the connection part of the pole piece and the lug; the electric core assembly is located in the shell.
Further, the one end parcel that utmost point ear was kept away from to electric core body has buffer structure.
Further, the pole piece part extends out of the buffer structure.
Further, the thickness of the part of the buffer structure wrapping the joint is 0.2mm-1 mm.
Further, the buffer structure is an injection molding structure.
Further, the battery comprises at least two electric core assemblies, and the pole pieces of the at least two electric core assemblies are electrically connected with the connecting plate.
Further, the connecting plate is an FPC board.
Further, the battery also comprises a PCB, the PCB is connected with the shell, and the PCB is electrically connected with the connecting plate.
According to another aspect of the present invention, there is provided a battery manufacturing method including the steps of: placing the electric core assembly into a mould; injecting plastic into a gap between the mold and the electric core component, so that the injection-molded plastic fluid wraps the joint of the pole piece and the pole lug to form a buffer structure; and installing the electric core component after the injection molding plastic is cooled and solidified into the shell.
Further, the injection molding process is a low-temperature injection molding process, and the injection molding temperature of the injection molding process is 60-100 ℃.
By applying the battery provided by the invention, the buffer structure wraps the joint of the pole piece and the pole lug, so that when the battery core assembly is impacted, the buffer structure can absorb most of the impact, the impact on the joint is smaller or even 0, the joint is not easy to break, and the condition that the pole piece is easy to fall off when the battery is impacted is effectively improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a top view of an electrical core assembly of a battery in an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line E-E of FIG. 1;
fig. 3 is a schematic diagram of a cell body in a battery according to an embodiment of the present invention;
FIG. 4 is an enlarged view taken at II in FIG. 3;
fig. 5 is an isometric view of a battery in an embodiment of the invention.
The figures contain the following reference numerals:
100. the battery comprises a battery core assembly, 110, a battery core body, 111, a battery core winding body, 112, a sealing edge, 113, tabs, 114, pole pieces, 115, a joint, 120, a buffer structure, 130 and a connecting plate;
200. a housing, 300, a PCB board.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 and 2, a battery includes a battery core assembly 100 and a casing 200, wherein the battery core assembly 100 includes a battery cell body 110 and a buffer structure 120; the battery cell body 110 comprises a battery cell winding body 111 and a tab 113, the tab 113 is electrically connected with the battery cell winding body 111, the tab 113 is connected with a pole piece 114, and the buffer structure 120 wraps a joint 115 where the pole piece 114 is connected with the tab 113; the electrical core assembly 100 is located in the housing 200.
The battery of this embodiment, because buffer structure 120 wraps up the junction 115 that pole piece 114 and utmost point ear 113 are connected, when electric core subassembly 100 received the striking, buffer structure 120 can absorb most impact for the impact that junction 115 received is less or even 0, makes junction 115 be difficult to the breaking occur, has effectively improved the condition that pole piece 114 drops easily when the battery received the striking.
Referring to fig. 3 and 4, in one specific structure of the battery cell body 110, the battery cell body 110 includes a winding body formed by winding a plurality of layers of materials, the sealing edge 112 surrounds the winding body and extends out of the winding body, and the sealing edge 112 extends out along three surfaces of the winding body, so that the opening direction of the sealing edge 112 is the direction of the sealing edge 112 towards the surface without extending out; wherein the sealing edge 112 is connected with a tab 113 of a positive electrode of the cell body 110, and the tab 113 connected with the positive electrode and the tab 113 connected with the negative electrode are both connected with a pole piece 114 for charging and discharging of the cell body 110; the pole piece 114 may be made of nickel.
As shown in fig. 1, in order to enhance the impact resistance of the electric core assembly 100, a buffer structure 120 may be wrapped at an end of the electric core body 110 away from the sealing edge 112, and the impact resistance of the electric core assembly 100 may be further enhanced by the cooperation of the two buffer structures 120.
Further, in order to ensure the buffering performance of the buffering structure 120 on the cell body 110, the buffering structure 120 is wrapped at the end away from the tab 113, and meanwhile, the length of the cell assembly 100 is not too long, the thickness of the buffering structure 120 wrapped at the end away from the tab 113 of the cell body 110 is 0.2mm to 1 mm.
As shown in fig. 2, in order to ensure that the buffer structure 120 can sufficiently absorb the impact propagating toward the connection position 115 without greatly affecting the length of the electric core assembly 100, the thickness of the portion of the buffer structure 120 covering the connection position 115 is 0.2mm to 1mm, and the thickness direction is referred to herein as the direction of the electric core winding body 111 toward the buffer structure 120.
As shown in fig. 2, to facilitate the fixation of the core assembly 100 to the connection plate 130, the pole piece 114 may be partially extended out of the buffer structure 120.
Further, the buffer structure 120 may be an injection molded structure.
In order to prevent the battery cell body 110 from being overheated and exploded due to overhigh plastic temperature during injection molding, a low-temperature injection molding process can be adopted for injection molding, and the injection molding temperature is controlled to be 60-100 ℃.
As shown in fig. 5, the battery includes at least two electric core assemblies 100, and the pole pieces 114 of the at least two electric core assemblies 100 are electrically connected to the connection plate 130.
Wherein, can adopt the FPC board to act as connecting plate 130, adopt soft FPC board can effectively solve a plurality of electric core subassemblies 100 dimensional accuracy difference and cause the problem that pole piece 114 is difficult to connect.
Further, in order to manage the charging and discharging operations of the electric core assembly 100 and prevent the battery from being excessively charged and discharged to affect the service life, the PCB 300 may be connected to the housing 200, and the PCB 300 is electrically connected to the connection plate 130; so that the charging and discharging operations of the cell assembly 100 are uniformly controlled by the control device on the PCB 300.
According to another aspect of the present embodiment, there is provided a battery manufacturing method including the steps of: placing the electric core assembly 100 into a mold; injecting plastic into a gap between the mold and the electric core assembly 100, so that the injected plastic fluid wraps the joint 115 where the pole piece 114 and the tab 113 are connected to form a buffer structure 120; the electric core assembly 100 after the injection molding plastic is cooled and solidified is installed in the housing 200.
Specifically, in order to prevent the electric core assembly 100 from exploding due to excessively high injection temperature during the manufacturing process of the battery, a low-temperature injection molding process may be used as the injection molding process, and the injection molding temperature may be 60 to 100 ℃. .
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. A battery, characterized by comprising a cell assembly (100) and a shell (200), wherein the cell assembly (100) comprises a cell body (110) and a buffer structure (120); the battery cell body (110) comprises a battery cell winding body (111) and a tab (113), the tab (113) is electrically connected with the battery cell winding body (111), a pole piece (114) is connected to the tab (113), and the buffer structure (120) wraps a connection part (115) where the pole piece (114) is connected with the tab (113); the electric core assembly (100) is located in the housing (200).
2. The battery of claim 1, wherein an end of the cell body (110) away from the tab (113) is wrapped with a buffer structure (120).
3. The battery of claim 1, wherein the pole piece (114) partially protrudes beyond the buffer structure (120).
4. The battery according to claim 1, wherein the thickness of the portion of the buffer structure (120) surrounding the connection site (115) is 0.2mm to 1 mm.
5. The battery according to claim 1, wherein the buffer structure (120) is an injection molded structure.
6. The battery according to claim 1, comprising at least two electric core assemblies (100), the pole pieces (114) of at least two electric core assemblies (100) being electrically connected with a connection plate (130).
7. The battery according to claim 6, wherein the connection board (130) is an FPC board.
8. The battery according to claim 7, further comprising a PCB board (300), wherein the PCB board (300) is connected with the case (200), and the PCB board (300) is electrically connected with the connection board (130).
9. A method of manufacturing a battery, comprising the steps of: placing the electrical core assembly (100) into a mold; injecting plastic into a gap between the mold and the electric core assembly (100), so that the injection-molded plastic fluid wraps a joint (115) where the pole piece (114) is connected with the pole lug (113) to form a buffer structure (120); and installing the electric core component (100) formed by cooling and solidifying the injection molding plastic into the shell (200).
10. The battery manufacturing method according to claim 9, wherein the injection molding process is a low-temperature injection molding process, and an injection molding temperature of the injection molding process is 60 ℃ to 100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911021358.1A CN110828710A (en) | 2019-10-25 | 2019-10-25 | Battery and battery manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911021358.1A CN110828710A (en) | 2019-10-25 | 2019-10-25 | Battery and battery manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110828710A true CN110828710A (en) | 2020-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911021358.1A Pending CN110828710A (en) | 2019-10-25 | 2019-10-25 | Battery and battery manufacturing method |
Country Status (1)
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| CN (1) | CN110828710A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114497917A (en) * | 2021-12-22 | 2022-05-13 | 珠海市古鑫电子科技有限公司 | Optimized structure of FPC in low-temperature injection molding of polymer battery cell |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203967163U (en) * | 2014-07-08 | 2014-11-26 | 东莞市泰有源电池科技有限公司 | A kind of lithium ion battery and extreme ear structure thereof |
| CN204424323U (en) * | 2014-12-02 | 2015-06-24 | 东莞新能德科技有限公司 | A kind of polymer Li-ion battery |
| JP2018037358A (en) * | 2016-09-01 | 2018-03-08 | Ｎｅｃエナジーデバイス株式会社 | Battery pack |
| CN210778684U (en) * | 2019-10-25 | 2020-06-16 | 珠海市古鑫电子科技有限公司 | Battery with a battery cell |
-
2019
- 2019-10-25 CN CN201911021358.1A patent/CN110828710A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203967163U (en) * | 2014-07-08 | 2014-11-26 | 东莞市泰有源电池科技有限公司 | A kind of lithium ion battery and extreme ear structure thereof |
| CN204424323U (en) * | 2014-12-02 | 2015-06-24 | 东莞新能德科技有限公司 | A kind of polymer Li-ion battery |
| JP2018037358A (en) * | 2016-09-01 | 2018-03-08 | Ｎｅｃエナジーデバイス株式会社 | Battery pack |
| CN210778684U (en) * | 2019-10-25 | 2020-06-16 | 珠海市古鑫电子科技有限公司 | Battery with a battery cell |
Non-Patent Citations (1)
| Title |
|---|
| [美]雷迪主编，汪继强等译: "《电池手册：第4版》", 31 May 2018, 北京：化学工业出版社, pages: 645 - 646 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114497917A (en) * | 2021-12-22 | 2022-05-13 | 珠海市古鑫电子科技有限公司 | Optimized structure of FPC in low-temperature injection molding of polymer battery cell |
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