CN111584938A - Lithium ion battery anode lithium supplementing method - Google Patents
Lithium ion battery anode lithium supplementing method Download PDFInfo
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- CN111584938A CN111584938A CN202010359548.0A CN202010359548A CN111584938A CN 111584938 A CN111584938 A CN 111584938A CN 202010359548 A CN202010359548 A CN 202010359548A CN 111584938 A CN111584938 A CN 111584938A
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- Prior art keywords
- battery
- lithium
- echelon
- anode
- formation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- 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
Abstract
The invention discloses a lithium ion battery anode lithium supplementing method, which comprises the following steps of S1: under the environment of opening formation, removing a top cover of the battery used in a gradient manner; s2: injecting electrolyte; s3: placing the battery to be opened and the echelon utilization battery side by side; s4: according to the first charge capacity Q1 and the first discharge capacity Q2 of the battery to be formed; s5: electrifying the positive electrode of the battery and the negative electrode of the battery to be formed in the echelon for charging; s6: electrifying and charging the anode of the battery to be formed and the cathode of the battery to be formed, wherein the charging electric quantity is Q2; s7: after the formation is finished, discharging electric quantity (Q1-Q2) of the battery anode and the metal lithium battery is utilized for echelon; s8: after the formation of the battery is finished, the battery to be formed is placed side by side with the next battery to be formed by opening. The invention fully utilizes the echelon battery to supplement lithium, has low cost and is easy to obtain; the lithium-ion battery can supplement lithium for the battery to be charged for many times by utilizing the battery in a gradient way by matching with a metal lithium cathode.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a lithium supplementing method for a lithium ion battery anode.
Background
The lithium ion battery gradually replaces the widely used traditional battery with a plurality of excellent performances, and the hot trend of the lithium ion battery is also promoted. After decades of vigorous development, lithium ion batteries have become the most widely used rechargeable batteries, especially in power batteries of electric vehicles, and have become almost the only choice. In the formation process of the lithium ion battery, the negative electrode reacts with the electrolyte to form a layer of solid electrolyte interface film SEI (solid electrolyte interface) on the electrode, the SEI film contains various lithium salts, the SEI film inhibits the further reaction of the negative electrode and the electrolyte, and the SEI film is a good conductor for lithium ions and an insulator for electrons, and plays a great role in improving the performance of the lithium ion battery. However, the SEI film has a disadvantage in that the formation process of the SEI film consumes lithium ions, which are originally stored in the positive electrode material and consume about 10% of the lithium ions, meaning that the capacity of the positive electrode material is reduced by 10% by the SEI formation process. In order to reduce the loss of capacity, various lithium supplementing technologies are developed in the industry, the lithium supplementing technologies are divided into positive electrode lithium supplementing and negative electrode lithium supplementing according to the categories, Chinese patent 201210350770.X considers that lithium powder supplements lithium for a positive plate, the process is complex, unsafe factors exist, organic lithium salt is sprayed on the surface of the positive plate, and then the lithium powder is reduced into metal lithium and is embedded into the positive plate. Patent application 201510961523.7 uses an inorganic lithium salt modified with a silane coupling agent added to the positive electrode sheet as a lithium supplement material. The method disclosed in chinese patent 201710552326.9 is to use a lithium supplement additive with the chemical formula xLi2OyMzmXn, where M is one or more of Mn, Fe, Co, Ni, Cu, Cr, N is one or more of Mn, Fe, Co, Ni, Cu, Al, Ti, Zn, Cr, Sn, Si, Mg, X is one or more of O, OH, F, PaOb, bao, SO4, Co3, and to provide a source of lithium ions during the first charge and discharge. Patent application 201910024266.2 proposes a scheme of using a lithium supplement anode, which is charged to a set voltage and then to a battery cathode. In the prior art, the situation that the battery is supplemented with lithium by using the positive electrode of the echelon battery as a lithium source is not considered, so that the echelon battery is scrapped after the echelon battery fully plays a role.
Disclosure of Invention
The invention aims to provide a lithium ion battery anode lithium supplementing method, which comprises the following specific steps:
s1: under the environment of opening formation, removing a top cover of the battery used in a gradient manner;
s2: injecting electrolyte, and placing a metal lithium electrode as a discharge electrode of the anode;
s3: placing the battery to be opened and the echelon utilization battery side by side, and communicating the electrolytes of the two batteries by using a lithium ion electrolyte salt bridge;
s4: calculating the amount (Q1-Q2) of lithium to be supplemented according to the first charge capacity Q1 and the first discharge capacity Q2 of the battery to be formed;
s5: electrifying the positive electrode of the battery and the negative electrode of the battery to be formed in the echelon to charge, wherein the charging quantity is Q1-Q2;
s6: electrifying and charging the anode of the battery to be formed and the cathode of the battery to be formed, wherein the charging electric quantity is Q2;
s7: after the formation is finished, discharging electric quantity (Q1-Q2) of the battery anode and the metal lithium battery is utilized for echelon;
s8: after the formation of the to-be-formed battery is finished, the echelon utilization battery and the next to-be-opened formation battery are placed side by side with the echelon utilization battery, and the electrolytes of the two batteries are communicated by a lithium ion electrolyte salt bridge to supplement lithium for the next to-be-formed battery.
Compared with the prior art, the invention has the beneficial effects that: the invention fully utilizes the echelon battery to supplement lithium, has low cost and is easy to obtain; the lithium-ion battery can supplement lithium for the battery to be charged for many times by utilizing the battery in a gradient way by matching with a metal lithium cathode.
Drawings
FIG. 1 is a schematic view showing the connection of a lithium supplement battery, electrodes and an electrolyte;
FIG. 2 is a schematic diagram of two electrodes for filling lithium in the charging connection;
FIG. 3 is a schematic diagram of the positive and negative electrodes of a battery to be formed, which is black-coated during formation charging;
fig. 4 is a schematic diagram of the step-wise electrical connection of the positive electrode and the metallic lithium electrode using battery discharge.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A lithium ion battery anode lithium supplement method comprises the following specific steps:
s1: under the environment of opening formation, removing a top cover of the battery used in a gradient manner;
s2: injecting electrolyte, and placing a metal lithium electrode as a discharge electrode of the anode;
s3: placing the battery to be opened and the echelon utilization battery side by side, and communicating the electrolytes of the two batteries by using a lithium ion electrolyte salt bridge;
s4: calculating the amount (Q1-Q2) of lithium to be supplemented according to the first charge capacity Q1 and the first discharge capacity Q2 of the battery to be formed;
s5: electrifying the positive electrode of the battery and the negative electrode of the battery to be formed in the echelon to charge, wherein the charging quantity is Q1-Q2;
s6: electrifying and charging the anode of the battery to be formed and the cathode of the battery to be formed, wherein the charging electric quantity is Q2;
s7: after the formation is finished, discharging electric quantity (Q1-Q2) of the battery anode and the metal lithium battery is utilized for echelon;
s8: after the formation of the to-be-formed battery is finished, the echelon utilization battery and the next to-be-opened formation battery are placed side by side with the echelon utilization battery, and the electrolytes of the two batteries are communicated by a lithium ion electrolyte salt bridge to supplement lithium for the next to-be-formed battery.
The invention fully utilizes the echelon battery to supplement lithium, has low cost and is easy to obtain; the lithium-ion battery can supplement lithium for the battery to be charged for many times by utilizing the battery in a gradient way by matching with a metal lithium cathode.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (1)
1. A lithium ion battery anode lithium supplement method is characterized in that: the lithium ion battery anode lithium supplement method comprises the following specific steps:
s1: under the environment of opening formation, removing a top cover of the battery used in a gradient manner;
s2: injecting electrolyte, and placing a metal lithium electrode as a discharge electrode of the anode;
s3: placing the battery to be opened and the echelon utilization battery side by side, and communicating the electrolytes of the two batteries by using a lithium ion electrolyte salt bridge;
s4: calculating the amount (Q1-Q2) of lithium to be supplemented according to the first charge capacity Q1 and the first discharge capacity Q2 of the battery to be formed;
s5: electrifying the positive electrode of the battery and the negative electrode of the battery to be formed in the echelon to charge, wherein the charging quantity is Q1-Q2;
s6: electrifying and charging the anode of the battery to be formed and the cathode of the battery to be formed, wherein the charging electric quantity is Q2;
s7: after the formation is finished, discharging electric quantity (Q1-Q2) of the battery anode and the metal lithium battery is utilized for echelon;
s8: after the formation of the to-be-formed battery is finished, the echelon utilization battery and the next to-be-opened formation battery are placed side by side with the echelon utilization battery, and the electrolytes of the two batteries are communicated by a lithium ion electrolyte salt bridge to supplement lithium for the next to-be-formed battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010359548.0A CN111584938A (en) | 2020-04-30 | 2020-04-30 | Lithium ion battery anode lithium supplementing method |
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| CN202010359548.0A CN111584938A (en) | 2020-04-30 | 2020-04-30 | Lithium ion battery anode lithium supplementing method |
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| CN111584938A true CN111584938A (en) | 2020-08-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113540591A (en) * | 2021-09-17 | 2021-10-22 | 中航锂电科技有限公司 | Lithium ion battery lithium supplementing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390764A (en) * | 2013-08-02 | 2013-11-13 | 清华大学 | Lithium ion battery with resumable capacity |
| CN106257714A (en) * | 2015-12-21 | 2016-12-28 | 上海卡耐新能源有限公司 | A kind of new system lithium ion battery and preparation method thereof |
| CN106450467A (en) * | 2016-09-07 | 2017-02-22 | 中南大学 | Lithium supplementing method for energy storage device |
| US20170309914A1 (en) * | 2016-04-20 | 2017-10-26 | Ford Global Technologies, Llc | Pre-lithiated lithium ion battery cell |
| CN109818093A (en) * | 2019-01-10 | 2019-05-28 | 山东衡远新能源科技有限公司 | Chemical synthesizing method, formation system, lithium ion battery and the electric vehicle of lithium ion battery |
-
2020
- 2020-04-30 CN CN202010359548.0A patent/CN111584938A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390764A (en) * | 2013-08-02 | 2013-11-13 | 清华大学 | Lithium ion battery with resumable capacity |
| CN106257714A (en) * | 2015-12-21 | 2016-12-28 | 上海卡耐新能源有限公司 | A kind of new system lithium ion battery and preparation method thereof |
| US20170309914A1 (en) * | 2016-04-20 | 2017-10-26 | Ford Global Technologies, Llc | Pre-lithiated lithium ion battery cell |
| CN106450467A (en) * | 2016-09-07 | 2017-02-22 | 中南大学 | Lithium supplementing method for energy storage device |
| CN109818093A (en) * | 2019-01-10 | 2019-05-28 | 山东衡远新能源科技有限公司 | Chemical synthesizing method, formation system, lithium ion battery and the electric vehicle of lithium ion battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113540591A (en) * | 2021-09-17 | 2021-10-22 | 中航锂电科技有限公司 | Lithium ion battery lithium supplementing method |
| CN113540591B (en) * | 2021-09-17 | 2021-12-17 | 中航锂电科技有限公司 | Lithium ion battery lithium supplementing method |
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Application publication date: 20200825 |