CN105655540A - Electrode pole piece and lithium ion battery - Google Patents
Electrode pole piece and lithium ion battery Download PDFInfo
- Publication number
- CN105655540A CN105655540A CN201410637889.4A CN201410637889A CN105655540A CN 105655540 A CN105655540 A CN 105655540A CN 201410637889 A CN201410637889 A CN 201410637889A CN 105655540 A CN105655540 A CN 105655540A
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- China
- Prior art keywords
- active material
- material layer
- edge
- electrode plates
- collector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The invention provides an electrode plate and a lithium ion battery, wherein the electrode plate comprises a current collector and an active material layer containing an active material, which is arranged on at least one surface of the current collector, wherein the electrode plate further comprises: and an insulating jelly coated on at least one edge of the active material layer. The lithium ion battery comprises the electrode pole piece. According to the invention, at least one edge of the active material layer is coated with the insulating jelly, the insulating jelly can enhance the adhesive force between the edge of the active material layer and the current collector and reduce the edge falling of the active material layer, so that the metal exposure of the current collector caused by the edge falling of the active material layer is avoided, meanwhile, the micro short circuit of the battery caused by burrs generated in the cutting process of the electrode pole piece can be avoided, and the safety performance of the lithium ion battery adopting the electrode pole piece is improved.
Description
Technical field
The present invention relates to energy storage device field, particularly relate to a kind of electrode plates and lithium ion battery.
Background technology
Lithium rechargeable battery because of its there is higher discharge capacity, good cycle performance, the advantage such as environmental friendliness is pollution-free, be widely used in the electronic equipment such as mobile phone, digital camera and electric automobile.
In the preparation process of lithium ion secondary battery electrode pole piece, with reference to Fig. 1, firstly the need of being coated with active material layer 2 on a surface 11 of collector 1, then on collector 1, form lug exit at the edge of collector 1 by the mode cut, finally again through the mode cut, electrode plates is cut as suitable width.
The electrode plates prepared by the method is in actual use procedure, the edge 21 of the active material layer 2 on collector 1 is subject to the effect of external force and is prone to come off from collector 1, cause the exposed metal/bare metal of collector 1, simultaneously, in the process preparing electrode plates, cutting collector 1 is formed in lug exit and process that electrode plates is cut all can in the cutting of collector 1 and cut edge and produce metallic bur power, the exposed metal/bare metal of collector and edge produce metallic bur power, all can affect the security performance of lithium rechargeable battery.
Summary of the invention
In view of Problems existing in background technology, it is an object of the invention to provide a kind of electrode plates and lithium ion battery, it is avoided that owing to the edge of active material layer comes off the exposed metal/bare metal of the collector caused.
Another object of the present invention is to provide a kind of electrode plates and lithium ion battery, it is avoided that electrode plates produces burr in cutting process.
Another object of the present invention is to provide a kind of electrode plates and lithium ion battery, it can improve the security performance of lithium ion battery.
To achieve these goals, in first aspect, the invention provides a kind of electrode plates, it includes collector and the active material layer containing active material being arranged at least one surface of collector, wherein, described electrode plates also includes: insulation jelly, is coated at least one edge of active material layer.
To achieve these goals, in second aspect, the invention provides a kind of lithium ion battery, it includes electrode plates described according to a first aspect of the present invention.
Beneficial effects of the present invention is as follows:
At least one edge at active material layer is coated with insulation jelly, insulation jelly can cohesive force between edge and the collector of enhanced activity material layer, the edge reducing active material layer comes off, thus avoiding owing to the edge of active material layer comes off the exposed metal/bare metal of the collector caused, simultaneously, the battery micro-short circuit that the burr produced in cutting process at electrode plates causes can also be avoided, thus improving the security performance of the energy storage device (such as lithium ion battery) adopting this electrode plates.
Accompanying drawing explanation
Fig. 1 is the plane graph of existing electrode plates;
Fig. 2 is the plane graph of the electrode plates according to the present invention;
Fig. 3 is the plane graph arranging lug exit on the electrode plates of Fig. 2;
Fig. 4 is the plane graph after being cut by the electrode plates of Fig. 3;
Fig. 5 is the sectional view along lug exit of Fig. 4;
Fig. 6 is the exploded view of Fig. 5;
Fig. 7 is the axonometric chart of the collector of the electrode plates in Fig. 5;
Fig. 8 is the sectional view along non-lug exit of Fig. 4;
Fig. 9 is an alternate embodiment of Fig. 5;
Figure 10 is the exploded view of Fig. 9;
Figure 11 is the axonometric chart of the collector of the electrode plates in Fig. 9;
Figure 12 is the sectional view along non-lug exit of Fig. 9.
Wherein, description of reference numerals is as follows:
1 collector 4 insulating cements-active material mixed layer
11 surface 5 lug exits
12 edge W widths
2 active material layer W1 width
21 edge W2 width
3 insulation jelly T1, T2 thickness
Detailed description of the invention
Describe the electrode plates according to the present invention and lithium ion battery with reference to the accompanying drawings in detail.
First electrode plates according to a first aspect of the present invention is described.
With reference to Fig. 2 to Figure 12, electrode plates according to a first aspect of the present invention includes collector 1 and the active material layer 2 containing active material being arranged at least one surface 11 of collector 1, wherein, described electrode plates also includes: insulation jelly 3, is coated at least one edge 21 of active material layer 2.
Insulation jelly 3 it is coated with at least one edge 21 place of active material layer 2, insulation jelly 3 can cohesive force between edge 21 and the collector 1 of enhanced activity material layer 2, the edge 21 reducing active material layer 2 comes off, thus avoiding owing to the edge 21 of active material layer 2 comes off the exposed metal/bare metal of the collector 1 caused, simultaneously, the battery micro-short circuit that the burr produced in cutting process at electrode plates causes can also be avoided, thus improving the security performance of the energy storage device (such as lithium ion battery) adopting this electrode plates.
With reference to Fig. 2 to Fig. 4, insulation jelly 3 can select in the position that at least one edge 21 place of active material layer 2 is coated with the cutting position of lug exit 5 correspondence or electrode plates corresponding respectively cut position, body place, and can simultaneously or sequentially be coated with.
In an embodiment of electrode plates according to a first aspect of the present invention, with reference to Fig. 5, Fig. 6, Fig. 8, Fig. 9, Figure 10, Figure 12. The active material layer 2 that insulation jelly 3 also may penetrate at least one edge 21 place described is interior to form insulating cement-active material mixed layer 4. Before drying insulation jelly 3, insulation jelly 3 can penetrate in active material layer 2, forms insulating cement-active material mixed layer 4.In one embodiment, insulation jelly 3 also may penetrate into the active material layer 2 at least one edge 21 place described and penetrates on collector 1. Thereby, it is possible to the cohesive force between enhanced activity material layer 2 self and active material layer 2 and collector 1.
In an embodiment of electrode plates according to a first aspect of the present invention, with reference to Fig. 8 to Figure 12, collector 1 11 at least one edge 12 place in the edge 12 corresponding with at least one edge 21 described in active material layer 2 on the surface being provided with active material layer 2 are not provided with active material layer 2 (with reference to Figure 11, wherein, the region between dotted line and edge 12 in Figure 11 is not provided with active material layer 2), the insulation jelly 3 that be coated in active material layer 2 described at least one edge 21 corresponding with at least one edge 12 described in collector 1 extends towards at least one edge 12 described in collector 1 accordingly. insulation jelly 3 extends towards at least one edge 12 described in collector 1, the cohesive force between active material layer 2 and collector 1 can be increased further, the edge 21 preventing active material layer 2 comes off, thus preventing owing to the edge 21 of active material layer 2 comes off the exposed metal/bare metal of the collector 1 caused.
In an embodiment of electrode plates according to a first aspect of the present invention, with reference to Fig. 5 to Fig. 7, Fig. 9 to Figure 11, described electrode plates can be provided with at least one lug exit 5, each lug exit 5 is fixedly connected on collector 1 at edge 12 place corresponding with an edge 21 at least one edge 21 described in active material layer 2 of collector 1, the insulation jelly 3 at this edge 21 being coated in active material layer 2 also extends to the fixed connection place between this lug exit 5 and collector 1 and extends to the free end of lug exit 5 along this lug exit 5 from this edge 21. burr is produced when cutting lug exit 5 on collector 1, thus improving the security performance of the energy storage device (such as lithium ion battery) adopting this electrode plates thereby, it is possible to reduce.
In an embodiment of electrode plates according to a first aspect of the present invention, with reference to Fig. 5 to Fig. 7, lug exit 5 can be one-body molded with collector 1.
In an embodiment of electrode plates according to a first aspect of the present invention, insulation jelly 3 is selected from least one in butadiene-styrene rubber, polyvinylidene fluoride.
In an embodiment of electrode plates according to a first aspect of the present invention, the width W1 being coated in the insulation jelly 3 at least one edge 21 of active material layer 2 can be 1mm��50mm.
In an embodiment of electrode plates according to a first aspect of the present invention, the insulation jelly 3 at least one the corresponding edge 21 being coated in active material layer 2 can for 1mm��50mm along the width W2 that this lug exit 5 extends from the fixed connection place of lug exit 5 with collector 1. In one embodiment, with reference to Fig. 6 and Figure 10, the thickness T2 of the insulation jelly 3 extending to lug exit 5 place can be 1 ��m-200 ��m.
In an embodiment of electrode plates according to a first aspect of the present invention, with reference to Fig. 6 and Figure 10, the thickness T1 (this thickness T only refers to that insulation jelly 3 does not penetrate into the part in active material layer 2) being coated in the insulation jelly 3 at least one edge 21 of active material layer 2 can be 1 ��m-200 ��m.
In an embodiment of electrode plates according to a first aspect of the present invention, Fig. 5, Fig. 6, Fig. 8, Fig. 9, Figure 10, Figure 12, two edges 21 on the width W of active material layer 2 can be coated with insulation jelly 3.
In an embodiment of electrode plates according to a first aspect of the present invention, Fig. 5, Fig. 6, Fig. 8, Fig. 9, Figure 10, Figure 12, two surfaces 11 of collector 1 are provided with the active material layer 2 containing active material, two edges 21 on the width W of each active material layer 2 that insulation jelly 3 is respectively coated on each surface 11 of collector 1.
In an embodiment of electrode plates according to a first aspect of the present invention, described electrode plates can be anode electrode pole piece or negative electrode pole piece.
In an embodiment of electrode plates according to a first aspect of the present invention, collector 1 can be aluminium foil or Copper Foil.
In an embodiment of electrode plates according to a first aspect of the present invention, active material layer 2 can be at least one in graphite, lithium carbonate, lithium nickel cobalt manganese, LiFePO4.
In an embodiment of electrode plates according to a first aspect of the present invention, insulation jelly 3 coating method can smear for fluid injection gun, spray at least one. Coating can select to arrange (such as smearing) active material layer 2 at electrode plates and carry out simultaneously, or arranges after active material layer 2 completes at electrode plates, then is coated insulation jelly 3 and dries. Fig. 1 to Fig. 4 gives a kind of set-up mode of insulation jelly 3, forms active material layer 2 first as shown in Figure 1; The upper coating insulation jelly 3 on the surface (i.e. the paper of Fig. 1) of active material layer 2, treats that insulation jelly 3 penetrates into the post-drying insulating cement shape thing 3 in active material layer 2, forms structure as shown in Figure 2 afterwards; Afterwards as it is shown on figure 3, cut out lug 5; Afterwards as shown in Figure 4, cutting from a middle bar insulation jelly 3, form two strip electrode pole pieces, Fig. 4 gives the above strip electrode pole piece cut out. Here illustrate, if the width of the W in the width direction of collector 1 is consistent with the width of final electrode plates in Fig. 1, then without carrying out above-mentioned cutting. Additionally, in fig. 2, at edge 21 place of active material layer 2 coating insulation jelly 3, it is possible to be coated directly onto active material layer 2 edge 21 place upper surface on and/or on the side surface at edge 21 place of active material layer 2.
Next lithium ion battery according to a second aspect of the present invention is described.
Lithium ion battery according to a second aspect of the present invention includes electrode plates described according to a first aspect of the present invention.
Claims (10)
1. an electrode plates, including collector (1) and be arranged at least one surface (11) of collector (1) containing the active material layer (2) of active material,
It is characterized in that, described electrode plates also includes:
Insulation jelly (3), is coated at least one edge (21) of active material layer (2).
2. electrode plates according to claim 1, it is characterized in that, the active material layer (2) that insulation jelly (3) also penetrates into described at least one edge (21) place is interior to form insulating cement-active material mixed layer (4).
3. electrode plates according to claim 2, it is characterised in that insulation jelly (3) also penetrates into the active material layer (2) at described at least one edge (21) place and penetrates on collector (1).
4. the electrode plates according to any one of claim 1-3, it is characterized in that, collector (1) (11) at least one edge (12) place in the edge (12) corresponding with described at least one edge (21) of active material layer (2) on the surface being provided with active material layer (2) is not provided with active material layer (2), the insulation jelly (3) of described at least one edge (21) that be coated in active material layer (2) corresponding with described at least one edge (12) of collector (1) extends towards described at least one edge (12) of collector (1) accordingly.
5. electrode plates according to claim 4, it is characterized in that, described electrode plates is provided with at least one lug exit (5), each lug exit (5) is fixedly connected on collector (1) at an edge (12) place corresponding with an edge (21) in described at least one edge (21) of active material layer (2) of collector (1), the insulation jelly (3) of this edge (21) being coated in active material layer (2) also extends to the fixed connection place between this lug exit (5) and collector (1) from this edge (21) and extends to the free end of lug exit (5) along this lug exit (5).
6. electrode plates according to claim 5, it is characterised in that lug exit (5) is one-body molded with collector (1).
7. electrode plates according to claim 1, it is characterised in that insulation jelly (3) at least one in butadiene-styrene rubber, polyvinylidene fluoride.
8. electrode plates according to claim 1, it is characterised in that two edges (21) on the width (W) of active material layer (2) are coated with insulation jelly (3).
9. electrode plates according to claim 1, it is characterized in that, two surfaces (11) of collector (1) are provided with the active material layer (2) containing active material, two edges (21) on the width (W) of each active material layer (2) that insulation jelly (3) is respectively coated on each surface (11) of collector (1).
10. a lithium ion battery, it is characterised in that include the electrode plates according to any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410637889.4A CN105655540A (en) | 2014-11-12 | 2014-11-12 | Electrode pole piece and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410637889.4A CN105655540A (en) | 2014-11-12 | 2014-11-12 | Electrode pole piece and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105655540A true CN105655540A (en) | 2016-06-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410637889.4A Pending CN105655540A (en) | 2014-11-12 | 2014-11-12 | Electrode pole piece and lithium ion battery |
Country Status (1)
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| CN (1) | CN105655540A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106654180A (en) * | 2016-12-29 | 2017-05-10 | 成都国珈星际固态锂电科技有限公司 | Battery pole piece and preparation method thereof and lithium-ion battery |
| WO2019169561A1 (en) * | 2018-03-06 | 2019-09-12 | 深圳前海优容科技有限公司 | Cell and manufacturing method therefor, battery, and electronic device |
| CN111180668A (en) * | 2019-12-30 | 2020-05-19 | 广州市广珠电池有限公司 | Section-coated lithium ion battery positive plate and preparation method thereof |
| CN112563455A (en) * | 2020-12-25 | 2021-03-26 | 东莞维科电池有限公司 | Preparation method of pole piece, pole piece and lithium ion battery |
| CN112751038A (en) * | 2021-02-23 | 2021-05-04 | 蜻蜓实验室(深圳)有限公司 | Composite current collector and lithium ion battery |
| CN113113564A (en) * | 2021-04-06 | 2021-07-13 | 湖北亿纬动力有限公司 | Multi-width coating structure, negative pole piece and application of negative pole piece |
| CN113130838A (en) * | 2021-03-17 | 2021-07-16 | 惠州锂威新能源科技有限公司 | Preparation method of multi-tab battery cell pole piece, multi-tab battery cell pole piece and multi-tab battery cell |
| CN113841268A (en) * | 2019-05-24 | 2021-12-24 | 瓦尔达微电池有限责任公司 | Electrochemical cell and method for manufacturing the same |
| CN114122327A (en) * | 2022-01-29 | 2022-03-01 | 宁德时代新能源科技股份有限公司 | Pole piece and secondary battery with same |
| WO2022041193A1 (en) * | 2020-08-31 | 2022-03-03 | 宁德新能源科技有限公司 | Electrode plate, electrochemical device, and electronic device |
| CN114552130A (en) * | 2021-09-13 | 2022-05-27 | 万向一二三股份公司 | Pole piece structure for improving lithium ion battery thermal compounding process infiltration |
| CN114583096A (en) * | 2021-11-25 | 2022-06-03 | 深圳市研一新材料有限责任公司 | Electrode plate and secondary battery thereof |
| WO2023130791A1 (en) * | 2022-01-04 | 2023-07-13 | 宁德时代新能源科技股份有限公司 | Electrode pole piece and preparation method therefor, secondary battery, battery module, and battery pack |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106654180A (en) * | 2016-12-29 | 2017-05-10 | 成都国珈星际固态锂电科技有限公司 | Battery pole piece and preparation method thereof and lithium-ion battery |
| WO2019169561A1 (en) * | 2018-03-06 | 2019-09-12 | 深圳前海优容科技有限公司 | Cell and manufacturing method therefor, battery, and electronic device |
| CN113841268A (en) * | 2019-05-24 | 2021-12-24 | 瓦尔达微电池有限责任公司 | Electrochemical cell and method for manufacturing the same |
| CN111180668A (en) * | 2019-12-30 | 2020-05-19 | 广州市广珠电池有限公司 | Section-coated lithium ion battery positive plate and preparation method thereof |
| WO2022041193A1 (en) * | 2020-08-31 | 2022-03-03 | 宁德新能源科技有限公司 | Electrode plate, electrochemical device, and electronic device |
| CN112563455A (en) * | 2020-12-25 | 2021-03-26 | 东莞维科电池有限公司 | Preparation method of pole piece, pole piece and lithium ion battery |
| CN112751038A (en) * | 2021-02-23 | 2021-05-04 | 蜻蜓实验室(深圳)有限公司 | Composite current collector and lithium ion battery |
| CN113130838A (en) * | 2021-03-17 | 2021-07-16 | 惠州锂威新能源科技有限公司 | Preparation method of multi-tab battery cell pole piece, multi-tab battery cell pole piece and multi-tab battery cell |
| CN113113564A (en) * | 2021-04-06 | 2021-07-13 | 湖北亿纬动力有限公司 | Multi-width coating structure, negative pole piece and application of negative pole piece |
| CN114552130A (en) * | 2021-09-13 | 2022-05-27 | 万向一二三股份公司 | Pole piece structure for improving lithium ion battery thermal compounding process infiltration |
| CN114583096A (en) * | 2021-11-25 | 2022-06-03 | 深圳市研一新材料有限责任公司 | Electrode plate and secondary battery thereof |
| CN114583096B (en) * | 2021-11-25 | 2024-03-22 | 深圳市研一新材料有限责任公司 | Electrode plate and secondary battery thereof |
| WO2023130791A1 (en) * | 2022-01-04 | 2023-07-13 | 宁德时代新能源科技股份有限公司 | Electrode pole piece and preparation method therefor, secondary battery, battery module, and battery pack |
| CN114122327A (en) * | 2022-01-29 | 2022-03-01 | 宁德时代新能源科技股份有限公司 | Pole piece and secondary battery with same |
| WO2023142340A1 (en) * | 2022-01-29 | 2023-08-03 | 宁德时代新能源科技股份有限公司 | Electrode plate, and secondary battery comprising same |
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Application publication date: 20160608 |