WO2015089749A1 - Lithium-ion battery provided with non-dust cloth - Google Patents

Lithium-ion battery provided with non-dust cloth Download PDF

Info

Publication number
WO2015089749A1
WO2015089749A1 PCT/CN2013/089743 CN2013089743W WO2015089749A1 WO 2015089749 A1 WO2015089749 A1 WO 2015089749A1 CN 2013089743 W CN2013089743 W CN 2013089743W WO 2015089749 A1 WO2015089749 A1 WO 2015089749A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrolyte
lithium
ion battery
dust
battery
Prior art date
Application number
PCT/CN2013/089743
Other languages
French (fr)
Chinese (zh)
Inventor
曾海彬
刁胜
向婷
Original Assignee
深圳市格瑞普电池有限公司
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 深圳市格瑞普电池有限公司 filed Critical 深圳市格瑞普电池有限公司
Priority to PCT/CN2013/089743 priority Critical patent/WO2015089749A1/en
Publication of WO2015089749A1 publication Critical patent/WO2015089749A1/en

Links

Classifications

    • 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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • 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
    • H01M50/691—Arrangements or processes for draining liquids from casings; Cleaning battery or cell casings
    • 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
    • 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

Definitions

  • the present invention relates to the field of energy, and in particular to a lithium ion battery with a dust-free cloth.
  • Lithium-ion batteries as a new energy source, have been widely used in various electronic devices and automobiles due to their advantages of environmental protection, recycling, small size, and portability, and have become one of the most widely used energy sources.
  • the existing lithium battery is gradually reduced in the internal circulation of the lithium battery after a period of time lapse, resulting in a decrease in the cycle performance of the lithium ion battery.
  • SUMMARY OF THE INVENTION One of the objects of embodiments of the present invention is to provide a lithium ion battery, which is advantageous for improving the cycle performance of a lithium ion battery.
  • a lithium ion battery includes: a casing, a battery body, an electrolyte, the battery body and an electrolyte packaged in the casing, and the electrolysis Filling the inner cavity of the casing, immersing the electric core body and infiltrating the electric core body;
  • the electric core body comprises: a diaphragm, a positive electrode sheet, a negative electrode sheet and a dust-free cloth, and each of the positive electrode sheets and the negative electrode sheets are respectively spaced apart from each other,
  • the clean cloth is located inside the electric core body.
  • the electric core body is a laminated body, and the laminated body includes each of the negative electrode sheets, a separator, and a positive electrode sheet stacked, and the clean cloth is laminated on the laminate Any layer of the body is laminated.
  • the size of the clean cloth is consistent with the size of the positive electrode sheet.
  • the dust-free cloth is at least two pieces.
  • the electric core body is a wound body
  • the winding body comprises a negative electrode sheet, a separator, a positive electrode sheet, and at least one The dust-free cloth is laminated and then wound from the inside to the outside.
  • the width of the clean cloth is the same as the width of the wound body, and the length is consistent with the width of the positive electrode sheet.
  • the dust-free cloth is at least two pieces.
  • a capsule is further included, and an electrolyte is encapsulated in the capsule.
  • the capsule is fixed within the housing and outside the cell.
  • the capsule is secured to a corner position within the housing.
  • the capsules are at least two. It can be seen from the above that, when the electrolyte solution is injected, the electrolyte is soaked in the electrolyte core body, and the electrolyte solution is infiltrated into the battery core body and absorbed by the dust-free cloth, so that the amount of electrolyte in the limited casing can be increased. Compared with the prior art, the capacity and cycle performance of the battery can be improved. In particular, when the internal electrolyte is reduced during the application of the battery, the electrolyte absorbed by the clean cloth can be released to replenish the lost electrolyte. Helps improve the cycle performance of the battery.
  • FIG. 1 is a schematic structural view of a lithium ion battery according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic view showing a comparison of liquid loss distribution provided in Comparative Test 1 of Embodiment 1 of the present invention
  • FIGS. 3 , 4, and 5 are Embodiment 1 of the present invention
  • FIG. 1 is a schematic structural view of a lithium ion battery according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic view showing a comparison of liquid loss distribution provided in Comparative Test 1 of Embodiment 1 of the present invention
  • FIGS. 3 , 4, and 5 are Embodiment 1 of the present invention
  • FIG. 6 is a schematic diagram showing the relationship of the capacity decay of the sample 5, the sample 6, the sample 11, the sample 12, the sample 25, and the sample 26 provided in the comparative test 1 during the cycle test;
  • FIG. 6 is a comparison test 1 in the first embodiment of the present invention.
  • Sample 1, Sample 2, and Sample 3 are schematic diagrams showing changes in battery capacity as a function of cycle number;
  • Figure 7 is a schematic representation of the battery capacity of Sample 11, Sample 12, and Sample 13 in Comparative Test 3 of Example 1 of the present invention. Schematic diagram of the change in the number of cycles. Reference mark:
  • the present embodiment provides a lithium ion battery, which mainly includes a housing, a battery body, and an electrolyte.
  • the electric core body and the electrolyte are encapsulated in the casing, the electrolyte fills the entire inner cavity of the casing, soaks the entire electric core body, and penetrates into the electric core body.
  • the battery body of the embodiment comprises: a separator, a positive electrode sheet, a negative electrode sheet, and a dust-free cloth layer.
  • a separator is disposed between any of the positive electrode sheets and the negative electrode sheets, and the dust-free cloth layer is located at any position inside the electric core body.
  • the dust-free cloth is placed in the battery body, and then the electric core body is placed inside the casing, the casing is sealed, the electrolyte is injected, and the liquid is formed into a volume.
  • Example battery when the electrolyte is injected, the electrolyte is soaked in the core body, and the electrolyte penetrates into the cell body and is absorbed by the dust-free cloth, so that the amount of the electrolyte in the limited casing can be increased, which is relative to the existing one.
  • the technology can improve the capacity and cycle performance of the battery.
  • the battery body therein is a laminate composed of a plurality of negative electrode sheets, a separator, and a positive electrode sheet, which are pre-cut when stacked.
  • the dust-free cloth is laminated on any layer of the laminate or in any of a plurality of layers to obtain a laminated battery body with a dust-free cloth.
  • the size of the clean cloth can be tailored to be the same as or similar to the size of the positive electrode sheet, and is added during the lamination operation. It is enough to be in the laminate.
  • the number of sheets of the dust-free cloth, the number of layers to be laminated, and the position of the lamination may be determined arbitrarily or according to design requirements.
  • the battery body therein is a strip-shaped negative electrode sheet, a strip-shaped separator, a strip-shaped positive electrode sheet, and at least one strip-like
  • the wound core body is obtained by winding the needle from the inside to the outside.
  • the size of the dust-free cloth can be tailored to: the width of the clean cloth and the corresponding width of the winding needle ( That is, the width of the wound body is uniform or approximate, so that the length of the clean cloth is consistent with the length of the positive electrode sheet.
  • the number of pieces of the dust-free cloth and its position can be determined arbitrarily or according to design requirements.
  • Comparative test 1 Analysis of fluid loss rate and cycle performance of coiled batteries
  • the battery of each group obtained in the same preparation process and the same test process as the AP5034076-llA-1300mAh batch was used as a comparison diagram of the liquid loss distribution corresponding to the test sample.
  • the above test sample has a size specification of 50*34*076, a discharge rate of 1C, and a capacity of 1300 mAh.
  • the four sample test samples are tested separately, and the electrolyte in the lithium ion battery is measured and compared with the previous injection amount, and the difference between the comparisons is The liquid injection amount ratio is taken as the liquid loss amount of the present embodiment.
  • a schematic diagram of the electrolyte loss rate comparison shown in Fig. 2 is obtained. In the picture :
  • 201 shows a test in which a layer of dust-free cloth with the same length and core width as the positive electrode is placed in the core.
  • FIG. 202 shows a schematic diagram of the liquid loss corresponding to the test sample in which two layers of the dust-free cloth having the same length and the same width as the core of the positive electrode are disposed in the core;
  • 203 shows a schematic diagram of the liquid loss corresponding to the test sample in which the dust-free cloth is not disposed in the core; 204 shows the test of setting three layers of the corrosion-resistant water-absorbing sponge sheet having the same length and the same width as the core of the positive electrode in the core. Schematic diagram of the liquid loss corresponding to the sample.
  • Fig. 3 is a schematic diagram showing the decay of the capacity of the sample 5 and the sample 6 in the test sample with a piece of clean cloth added with time, wherein the curves 5 and 6 correspond to the samples 5 and 6, respectively.
  • Fig. 4 is a schematic diagram showing the curve of the sample with the addition of two pieces of clean cloth and the sample 12 attenuating with time during the cycle test, wherein the curves 11 and 12 correspond to the samples 11, 12 respectively.
  • Fig. 5 is a schematic diagram showing the curve of the capacity decay with time of the unpurified cloth sample 25 and the sample 26 in the cycle test, wherein the curves 25 and 26 correspond to the samples 25 and 26, respectively.
  • the technical solution of the embodiment can greatly reduce the amount of liquid loss in the cycle of the preparation, and is beneficial to improving the preparation of the battery. Cyclic performance in the process.
  • Comparative test 2 analysis of the loss rate test applied to laminated batteries
  • Each group of batteries obtained in the same preparation process and the same test procedure as the AP7849135-U2A 4400 mAh batch was used as a test sample for liquid loss analysis.
  • the above test sample has a size specification of 78*49*135, a discharge rate of 30C, and a capacity of 4400 mAh.
  • the preparation information of this batch of batteries is as follows:
  • the single side surface density of the positive electrode is 90-93g/m2; the double-sided surface density
  • No. 1-10 is a laminated lithium ion battery without a dust-free cloth
  • No. 11-20 is a sample of laminated lithium ion battery with 2 layers of clean cloth
  • No. 21-30 is a sample of laminated lithium ion batteries with 3 layers of corrosion-resistant absorbent sponge sheets.
  • Table 2 Data comparison of the amount of liquid loss in the test sample of the test 2
  • Test 3 Ratio capacity ratio comparison The test battery samples in the following test 2 were subjected to the same capacity test for the same capacity test. Obtain the table shown in Table 2: Table 2: Ratio capacity ratio table After content separation After volume capacity Median electricity No. 0.5C capacity 0.5C platform 1C capacity 1C platform 30C capacity
  • Test 3 Circulating performance comparison The cycle performance test of the sample in test 2 is compared, and the cycle performance change diagrams shown in Figs. 6 and 7 are obtained, wherein Fig. 6 is a non-dust-free cloth.
  • the cycle performance curve of the battery, the curves 5 and 6 in the figure correspond to the samples 5 and 6 of the type battery respectively; wherein Fig. 6 is the cycle performance curve of the battery with a piece of clean cloth, the curves 11 and 12 respectively Samples 11, 12 of type battery should be used. Referring to FIG.
  • the technical solution of the embodiment can be applied to a high-capacity large-capacity lithium ion battery, which can greatly reduce the amount of liquid loss of the battery during the preparation process, and is beneficial to improve.
  • the cycle performance of the battery during preparation can greatly reduce the amount of liquid loss of the battery during the preparation process, and is beneficial to improve.
  • the present embodiment it is also possible to further provide a capsule in the housing of the battery body of the battery of the present embodiment, and to encapsulate the electrolyte in the capsule.
  • the user when the user applies the battery of the embodiment for a certain period of time, when the capacity of the battery is attenuated, the user can squeeze the electrolyte capsule by pressing the surface of the battery body, thereby replenishing the electrolyte in the capsule.
  • participating in the electrolysis reaction is beneficial to the recovery of the capacity of the lithium ion battery, and is beneficial to improving the cycle performance of the battery.
  • the capsule may be disposed at a corner portion of the housing of the battery body, and the number of the capsules may be one, two, three or four or more, depending on the actual Need and battery size settings.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

A lithium-ion battery comprises a housing (103), a cell body (101), and an electrolyte. The cell body (101) and the electrolyte are packaged in the housing (103). An inner cavity of the housing is filled with the electrolyte. The electrolyte soaks the cell body and permeates into the cell body. The cell body comprises diaphragms, positive plates, negative plates and non-dust cloth. One diaphragm is spaced between any one positive plate and negative plate, and the non-dust cloth is located in the cell body. The non-dust cloth can absorb electrolyte, a quantity of electrolyte in a limited housing is increased, and lost electrolyte is supplemented when electrolyte in a battery is decreased, thereby improving the cycling performance of the battery.

Description

带无尘布的锂离子电池 技术领域 本发明涉及能源领域，特别涉及一种带无尘布的锂离子电池。 背景技术 锂离子电池作为一种新能源，由于其绿色环保、 可循环利用、体积小便于 携带等优点被广泛应用于各种电子设备以及汽车，已经成为了目前应用最广泛 的能源之一。  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of energy, and in particular to a lithium ion battery with a dust-free cloth. BACKGROUND OF THE INVENTION Lithium-ion batteries, as a new energy source, have been widely used in various electronic devices and automobiles due to their advantages of environmental protection, recycling, small size, and portability, and have become one of the most widely used energy sources.
发明人在进行本发明的研究过程中发现，现有技术存在以下的缺陷： 现有锂电池在经过倍率循环一段时间后，其内部的电解液会逐渐减少，导 致锂离子电池的循环性能下降。 发明内容 本发明实施例的目的之一在于提供一种锂离子电池，应用该技术方案有 利于提高锂离子电池的循环性能。  The inventors found in the research process of the present invention that the prior art has the following drawbacks: The existing lithium battery is gradually reduced in the internal circulation of the lithium battery after a period of time lapse, resulting in a decrease in the cycle performance of the lithium ion battery. SUMMARY OF THE INVENTION One of the objects of embodiments of the present invention is to provide a lithium ion battery, which is advantageous for improving the cycle performance of a lithium ion battery.
第一方面，本发明实施例提供的一种锂离子电池，其特征是，包括：壳 体、 电芯体、 电解液， 所述电芯体以及电解液封装在所述壳体内 ，所述电解液充满所述壳体内 腔，浸泡所述电芯体并且渗入所述电芯体；  In a first aspect, a lithium ion battery according to an embodiment of the present invention includes: a casing, a battery body, an electrolyte, the battery body and an electrolyte packaged in the casing, and the electrolysis Filling the inner cavity of the casing, immersing the electric core body and infiltrating the electric core body;
所述电芯体包括：隔膜、 正极片、 负极片以及无尘布， 在任一正极片、 负极片之间分别间隔有一所述各隔膜，  The electric core body comprises: a diaphragm, a positive electrode sheet, a negative electrode sheet and a dust-free cloth, and each of the positive electrode sheets and the negative electrode sheets are respectively spaced apart from each other,
所述无尘布位于所述电芯体内部。  The clean cloth is located inside the electric core body.
结合第一方面，在第一种实现方式下，所述电芯体为层叠体，所述层叠 体包括层叠的各所述负极片、 隔膜、 正极片，所述无尘布层叠在所述层叠体的 任意一层叠层。 结合第一方面，在第一种实现方式下，所述无尘布的尺寸与所述正极片 的尺寸一致。 In combination with the first aspect, in a first implementation manner, the electric core body is a laminated body, and the laminated body includes each of the negative electrode sheets, a separator, and a positive electrode sheet stacked, and the clean cloth is laminated on the laminate Any layer of the body is laminated. In combination with the first aspect, in the first implementation, the size of the clean cloth is consistent with the size of the positive electrode sheet.
结合第一方面，在第一种实现方式下，所述无尘布为至少两片。  In combination with the first aspect, in the first implementation, the dust-free cloth is at least two pieces.
结合第一方面，在第一种实现方式下，所述电芯体为卷绕体， 所述卷绕体由一所述负极片、 一所述隔膜、 一所述正极片、 以及至少一 所述无尘布层叠后由内到外卷绕组成。  With reference to the first aspect, in a first implementation manner, the electric core body is a wound body, the winding body comprises a negative electrode sheet, a separator, a positive electrode sheet, and at least one The dust-free cloth is laminated and then wound from the inside to the outside.
结合第一方面，在第一种实现方式下，所述无尘布的宽度与所述卷绕体 的宽度一致，长度与所述正极片的宽度一致。  In combination with the first aspect, in the first implementation, the width of the clean cloth is the same as the width of the wound body, and the length is consistent with the width of the positive electrode sheet.
结合第一方面，在第一种实现方式下，所述无尘布为至少两片。  In combination with the first aspect, in the first implementation, the dust-free cloth is at least two pieces.
结合第一方面，在第一种实现方式下，还包括胶囊， 在所述胶囊中封装有电解液，  In combination with the first aspect, in a first implementation, a capsule is further included, and an electrolyte is encapsulated in the capsule.
所述胶囊固定在所述壳体内 ，位于所述电芯体外。  The capsule is fixed within the housing and outside the cell.
结合第一方面，在第一种实现方式下， 所述胶囊固定在所述壳体内的转角位置。  In connection with the first aspect, in a first implementation, the capsule is secured to a corner position within the housing.
结合第一方面，在第一种实现方式下，所述胶囊为至少两个。 由上可见，应用本实施例技术方案，注电解液时，使电解液浸泡电芯体， 电解液渗入电芯体内 ，被无尘布吸收，从而可以提高在有限的壳体内的电解液 量，其相对于现有技术能提高电池的容量以及循环性能，特别是，在电池的应 用过程中 ，其内部的电解液减少时，无尘布吸收的电解液能够被释放补充被损 耗的电解液，有利于改善电池的循环性能。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施 例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述 中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付 出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。 图 1为本发明实施例 1提供的锂离子电池结构示意图 ； 图 2为本发明实施例 1中对比试验 1中提供的液失量分布对比示意图 ； 图 3、 4、 5为本发明实施例 1中对比试验 1中提供的样品 5、 样品 6、 样 品 11、 样品 12、 样品 25、 样品 26在循环测试时容量随时间衰减的曲线示意 图 ； 图 6为本发明实施例 1中对比试验 1中的样品 1、 样品 2、 样品 3作为示 意得到的电池容量随循环次数的变化示意图 ； 图 7为本发明实施例 1中对比试验 3中的样品 11、样品 12、样品 13作为 示意得到的电池容量随循环次数的变化示意图。 附图标记： In combination with the first aspect, in a first implementation, the capsules are at least two. It can be seen from the above that, when the electrolyte solution is injected, the electrolyte is soaked in the electrolyte core body, and the electrolyte solution is infiltrated into the battery core body and absorbed by the dust-free cloth, so that the amount of electrolyte in the limited casing can be increased. Compared with the prior art, the capacity and cycle performance of the battery can be improved. In particular, when the internal electrolyte is reduced during the application of the battery, the electrolyte absorbed by the clean cloth can be released to replenish the lost electrolyte. Helps improve the cycle performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and obviously, in the following description The drawings are only some embodiments of the invention, and are not paid to those of ordinary skill in the art Other drawings can also be obtained from these drawings on the premise of creative labor. 1 is a schematic structural view of a lithium ion battery according to Embodiment 1 of the present invention; FIG. 2 is a schematic view showing a comparison of liquid loss distribution provided in Comparative Test 1 of Embodiment 1 of the present invention; FIGS. 3 , 4, and 5 are Embodiment 1 of the present invention; FIG. 6 is a schematic diagram showing the relationship of the capacity decay of the sample 5, the sample 6, the sample 11, the sample 12, the sample 25, and the sample 26 provided in the comparative test 1 during the cycle test; FIG. 6 is a comparison test 1 in the first embodiment of the present invention. Sample 1, Sample 2, and Sample 3 are schematic diagrams showing changes in battery capacity as a function of cycle number; Figure 7 is a schematic representation of the battery capacity of Sample 11, Sample 12, and Sample 13 in Comparative Test 3 of Example 1 of the present invention. Schematic diagram of the change in the number of cycles. Reference mark:
101： 电芯体； 102：胶囊； 103：壳体。 具体实施方式 参见图 1所示，本实施例提供了一种锂离子电池，其主要包括：壳体、 电 芯体、 电解液。 其中 ，电芯体以及电解液封装在壳体内 ，电解液充满壳体的整 个内腔，浸泡整个电芯体，并且渗入电芯体。 本实施例的电芯体包括：隔膜、 正极片、负极片以及无尘布层，在任一正极片、负极片之间分别间隔有一隔膜， 无尘布层位于电芯体内部的任意位置。 在制备时，按照电芯体的类型，将无尘布设置在电芯体内 ，然后将电芯体 置入壳体的内部，封装壳体，注电解液，化成，分容，即得本实施例的电池。 在本实施例中 ，注电解液时，使电解液浸泡电芯体，电解液渗入电芯体内 ， 被无尘布吸收，从而可以提高在有限的壳体内的电解液量，其相对于现有技术 能提高电池的容量以及循环性能，特别是，在电池的应用过程中 ，其内部的电 解液减少时，无尘布吸收的电解液能够被释放补充被损耗的电解液，有利于改 善电池的循环性能。 作为本实施例的示意，将本实施例应用于叠片锂离子电池时，其中的电芯 体为由多片负极片、 隔膜、 正极片层叠组成的层叠体，在层叠时，将预裁好的 无尘布层叠在层叠体的任一层或者任意多层中即可得到带无尘布的层叠电芯 体。 101: battery body; 102: capsule; 103: housing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1 , the present embodiment provides a lithium ion battery, which mainly includes a housing, a battery body, and an electrolyte. Wherein, the electric core body and the electrolyte are encapsulated in the casing, the electrolyte fills the entire inner cavity of the casing, soaks the entire electric core body, and penetrates into the electric core body. The battery body of the embodiment comprises: a separator, a positive electrode sheet, a negative electrode sheet, and a dust-free cloth layer. A separator is disposed between any of the positive electrode sheets and the negative electrode sheets, and the dust-free cloth layer is located at any position inside the electric core body. In the preparation, according to the type of the electric core body, the dust-free cloth is placed in the battery body, and then the electric core body is placed inside the casing, the casing is sealed, the electrolyte is injected, and the liquid is formed into a volume. Example battery. In the present embodiment, when the electrolyte is injected, the electrolyte is soaked in the core body, and the electrolyte penetrates into the cell body and is absorbed by the dust-free cloth, so that the amount of the electrolyte in the limited casing can be increased, which is relative to the existing one. The technology can improve the capacity and cycle performance of the battery. In particular, during the application of the battery, when the internal electrolyte is reduced, the electrolyte absorbed by the clean cloth can be released to replenish the lost electrolyte, which is beneficial to improve the battery. Cycle performance. As an illustration of the present embodiment, when the present embodiment is applied to a laminated lithium ion battery, the battery body therein is a laminate composed of a plurality of negative electrode sheets, a separator, and a positive electrode sheet, which are pre-cut when stacked. The dust-free cloth is laminated on any layer of the laminate or in any of a plurality of layers to obtain a laminated battery body with a dust-free cloth.
作为本实施例的示意，为了进一步提高本层叠电芯体的外观平整一致性， 在本实施例中可以将无尘布的尺寸剪裁成与正极片的尺寸一致或者近似，在叠 片作业时加入到层叠体中即可。其中无尘布的片数以及层叠的层数以及层叠的 位置可以任意或者根据设计要求确定。 作为本实施例的示意，将本实施例应用于卷绕锂离子电池时，其中的电芯 体为由一条状的负极片、 一条状的隔膜、 一条状的正极片、 以及至少一条状的 无尘布层叠后，通过卷针由内到外卷绕得到卷绕电芯体。 作为本实施例的示意，为了进一步提高本层叠电芯体的外观平整一致性， 在本实施例中可以将无尘布的尺寸剪裁成：使无尘布的宽度与对应的卷针的宽 度（即卷绕体的宽度）一致或者近似，使无尘布的长度与正极片的长度一致。 其中无尘布的片数以及其位置可以任意或者根据设计要求确定。 试验数据分析： 为了进一步说明本实施例的效果，以下通过试验分析对本实施例的效果进 行适宜说明。  As an illustration of the present embodiment, in order to further improve the appearance uniformity of the laminated battery body, in the present embodiment, the size of the clean cloth can be tailored to be the same as or similar to the size of the positive electrode sheet, and is added during the lamination operation. It is enough to be in the laminate. The number of sheets of the dust-free cloth, the number of layers to be laminated, and the position of the lamination may be determined arbitrarily or according to design requirements. As an illustration of the present embodiment, when the present embodiment is applied to a wound lithium ion battery, the battery body therein is a strip-shaped negative electrode sheet, a strip-shaped separator, a strip-shaped positive electrode sheet, and at least one strip-like After the dust cloth is laminated, the wound core body is obtained by winding the needle from the inside to the outside. As an illustration of the present embodiment, in order to further improve the appearance uniformity of the laminated battery core body, in the present embodiment, the size of the dust-free cloth can be tailored to: the width of the clean cloth and the corresponding width of the winding needle ( That is, the width of the wound body is uniform or approximate, so that the length of the clean cloth is consistent with the length of the positive electrode sheet. The number of pieces of the dust-free cloth and its position can be determined arbitrarily or according to design requirements. Test Data Analysis: In order to further explain the effects of the present embodiment, the effects of the present embodiment will be appropriately described below by experimental analysis.
对比试验 1：应用于卷绕电池的失液率以及循环性能试验分析  Comparative test 1: Analysis of fluid loss rate and cycle performance of coiled batteries
以 AP5034076-llA-1300mAh批次按照相同制备工艺以及相同试验工艺得 到的各组电池作为试验样品对应的液失量分布对比示意图。上述试验样品的尺 寸规格为 50*34*076 ,放电倍率为 1C ,容量为 1300mAh。 在电池化成抽气二次封装后，对分别对四个抽样试验样品进行测试，对锂 离子电池内的电解液进行测量，并与之前的注液量进行比对，将比对的差值与 注液量比值作为本实施例的失液量。 得到图 2 所示的电解液流失率比对示意 图。 在图中 ：  The battery of each group obtained in the same preparation process and the same test process as the AP5034076-llA-1300mAh batch was used as a comparison diagram of the liquid loss distribution corresponding to the test sample. The above test sample has a size specification of 50*34*076, a discharge rate of 1C, and a capacity of 1300 mAh. After the battery is turned into a secondary encapsulation, the four sample test samples are tested separately, and the electrolyte in the lithium ion battery is measured and compared with the previous injection amount, and the difference between the comparisons is The liquid injection amount ratio is taken as the liquid loss amount of the present embodiment. A schematic diagram of the electrolyte loss rate comparison shown in Fig. 2 is obtained. In the picture :
201 示意了在卷芯中设置了一层与正极片同长与卷芯同宽的无尘布的试 验样品对应的液失量示意图 ； 201 shows a test in which a layer of dust-free cloth with the same length and core width as the positive electrode is placed in the core. A schematic diagram of the liquid loss corresponding to the sample;
202 示意了在卷芯中设置了两层与正极片同长与卷芯同宽的无尘布的试 验样品对应的液失量示意图 ；  202 shows a schematic diagram of the liquid loss corresponding to the test sample in which two layers of the dust-free cloth having the same length and the same width as the core of the positive electrode are disposed in the core;
203示意了在卷芯中未设置无尘布的试验样品对应的液失量示意图 ； 204 示意了在卷芯中设置三层与正极片同长与卷芯同宽的耐腐蚀吸水海 绵片的试验样品对应的液失量示意图。  203 shows a schematic diagram of the liquid loss corresponding to the test sample in which the dust-free cloth is not disposed in the core; 204 shows the test of setting three layers of the corrosion-resistant water-absorbing sponge sheet having the same length and the same width as the core of the positive electrode in the core. Schematic diagram of the liquid loss corresponding to the sample.
图 3为本试验一种加了一片无尘布的试验样品中的样品 5、样品 6在循环 测试时容量随时间衰减的曲线示意图 ，其中曲线 5、 6分别对应样品 5、 6。  Fig. 3 is a schematic diagram showing the decay of the capacity of the sample 5 and the sample 6 in the test sample with a piece of clean cloth added with time, wherein the curves 5 and 6 correspond to the samples 5 and 6, respectively.
图 4为本试验一种加了两片无尘布的样品 11、 样品 12在循环测试时容量 随时间衰减的曲线示意图 ，其中曲线 11、 12分别对应样品 11、 12。 图 5为本试验一种未加无尘布样品 25、样品 26在循环测试时容量随时间 衰减的曲线示意图 ，其中曲线 25、 26分别对应样品 25、 26。  Fig. 4 is a schematic diagram showing the curve of the sample with the addition of two pieces of clean cloth and the sample 12 attenuating with time during the cycle test, wherein the curves 11 and 12 correspond to the samples 11, 12 respectively. Fig. 5 is a schematic diagram showing the curve of the capacity decay with time of the unpurified cloth sample 25 and the sample 26 in the cycle test, wherein the curves 25 and 26 correspond to the samples 25 and 26, respectively.
参见图 2、 3、 4、 5以及表一可见，在低倍率的锂离子电池中 ，应用本实 施例技术方案可以大大降低电池在制备的循环过程中的失液量，有利于提高电 池在制备过程中的循环性能。  Referring to Figures 2, 3, 4, 5 and Table 1, it can be seen that in the low-rate lithium ion battery, the technical solution of the embodiment can greatly reduce the amount of liquid loss in the cycle of the preparation, and is beneficial to improving the preparation of the battery. Cyclic performance in the process.
对比试验 2：应用于叠片电池的失液率试验分析  Comparative test 2: analysis of the loss rate test applied to laminated batteries
以 AP7849135-U2A 4400mAh批次按照相同制备工艺以及相同试验工艺得 到的各组电池作为试验样品进行液失量分析。 上述试验样品的尺寸规格为 78*49*135 ,放电倍率为 30C ,容量为 4400mAh。 本批次电池的制备信息如下： 正极单面面密度 90-93g/m2；双面面密度 Each group of batteries obtained in the same preparation process and the same test procedure as the AP7849135-U2A 4400 mAh batch was used as a test sample for liquid loss analysis. The above test sample has a size specification of 78*49*135, a discharge rate of 30C, and a capacity of 4400 mAh. The preparation information of this batch of batteries is as follows: The single side surface density of the positive electrode is 90-93g/m2; the double-sided surface density
181.7-184g/m2 (生产时间 6月 3号 16:00-21:00 ) ,负极单面面密度 42.44g/m2 , 双面面密度 83.86g/m2(温度 29 °C ^度 22.8%，生产时间 6月 3号 9:30-11 :30 ) , 叠片生产时间 6月 4号 8： 00-15:30 ,叠片车间温度 25.1 °C ,湿度 43.9% ,露 点 12.4%。 封 装生产时间 6月 6号 9:30。 与试验一同理，在电池化成抽气二次封装后，对分别对 10个抽样试验样 品进行测试，对锂离子电池内的电解液进行测量，得到失液量。 其中 ， 181.7-184g/m2 (production time June 3, 16:00-21:00), the single side surface density of the negative electrode is 42.44g/m2, and the double-sided surface density is 83.86g/m2 (temperature 29 °C ^ 22.8%, production Time June 3rd 9:30-11:30), lamination production time June 4th 8: 00-15:30, lamination workshop temperature 25.1 °C, humidity 43.9%, dew point 12.4%. Package production time June 6th 9:30. In the same way as the test, after the battery was formed into a secondary package for pumping, 10 samples of the test samples were tested, and the electrolyte in the lithium ion battery was measured to obtain the amount of liquid loss. among them ,
序号 1-10为未加无尘布的叠片锂离子电池； 序号 11-20为加 2层无尘布的叠片锂离子电池样品； No. 1-10 is a laminated lithium ion battery without a dust-free cloth; No. 11-20 is a sample of laminated lithium ion battery with 2 layers of clean cloth;
序号 21-30为加 3层耐腐蚀吸水海绵片的叠片锂离子电池样品。  No. 21-30 is a sample of laminated lithium ion batteries with 3 layers of corrosion-resistant absorbent sponge sheets.
表二：试验二试验样品的失液量进行的数据比对表 制片正 负极片  Table 2: Data comparison of the amount of liquid loss in the test sample of the test 2
样品 S片后 注液前重 注液后重 抽气前 抽气后重  Sample S after the film is injected before refilling, after refilling, before pumping, after pumping
∞ ∞ 注液量 失液量  ∞ ∞ Injection volume Loss of liquid
失液率 极重量 重量  Liquid loss rate
序号 重量 (g) 量 (g) 量 (g) (g) 重量 (g) 量 (g) (g)  No. Weight (g) Amount (g) Amount (g) (g) Weight (g) Amount (g) (g)
(Kg) (Kg)  (Kg) (Kg)
1 0.045 0.038 87.04 93.85 115.54 21.69 115.65 115.11 0.54 2.49% 1 0.045 0.038 87.04 93.85 115.54 21.69 115.65 115.11 0.54 2.49%
2 0.045 0.04 86.8 93.58 115.19 21.61 115.33 114.8 0.53 2.44%2 0.045 0.04 86.8 93.58 115.19 21.61 115.33 114.8 0.53 2.44%
3 0.045 0.038 87.57 94.33 116.07 21.74 116.18 115.56 0.62 2.86%3 0.045 0.038 87.57 94.33 116.07 21.74 116.18 115.56 0.62 2.86%
4 0.046 0.038 87.38 94.22 115.94 21.72 116.09 115.67 0.42 1.93%4 0.046 0.038 87.38 94.22 115.94 21.72 116.09 115.67 0.42 1.93%
5 0.045 0.038 87.44 94.22 115.87 21.65 115.97 115.46 0.51 2.35%5 0.045 0.038 87.44 94.22 115.87 21.65 115.97 115.46 0.51 2.35%
6 0.045 0.038 87.56 94.53 116.05 21.52 116.12 115.68 0.44 2.03%6 0.045 0.038 87.56 94.53 116.05 21.52 116.12 115.68 0.44 2.03%
7 0.045 0.038 93.88 115.59 21.71 115.68 115.23 0.45 2.07%7 0.045 0.038 93.88 115.59 21.71 115.68 115.23 0.45 2.07%
8 0.045 0.038 93.89 115.47 21.58 115.57 115.08 0.49 2.26%8 0.045 0.038 93.89 115.47 21.58 115.57 115.08 0.49 2.26%
9 0.045 0.038 87.35 94.28 116.07 21.79 116.16 115.53 0.63 2.90%9 0.045 0.038 87.35 94.28 116.07 21.79 116.16 115.53 0.63 2.90%
10 0.045 0.04 86.92 93 114.68 21.68 114.76 114.25 0.51 2.35% 最大值 10 0.045 0.04 86.92 93 114.68 21.68 114.76 114.25 0.51 2.35% Maximum
0.046 0.04 87.57 94.53 116.07 21.79 116.18 115.68 0.63 2.90% 最小值  0.046 0.04 87.57 94.53 116.07 21.79 116.18 115.68 0.63 2.90% minimum
0.045 0.038 86.8 93 114.68 21.52 114.76 114.25 0.42 1.93% 平均值  0.045 0.038 86.8 93 114.68 21.52 114.76 114.25 0.42 1.93% Average
0.045 0.039 87.20 93.94 115.60 21.67 115.70 115.19 0.52 2.38% 0.045 0.039 87.20 93.94 115.60 21.67 115.70 115.19 0.52 2.38%
11 0.045 0.038 88.05 95.14 116.7 21.56 116.84 116.43 0.41 1.89%11 0.045 0.038 88.05 95.14 116.7 21.56 116.84 116.43 0.41 1.89%
12 0.045 0.038 87.88 94.9 116.56 21.66 116.66 116.02 0.64 2.95%12 0.045 0.038 87.88 94.9 116.56 21.66 116.66 116.02 0.64 2.95%
13 0.045 0.038 87.91 94.88 116.45 21.57 116.59 116.35 0.24 1.11%13 0.045 0.038 87.91 94.88 116.45 21.57 116.59 116.35 0.24 1.11%
14 0.045 0.038 88.06 95.05 116.75 21.7 116.81 116.54 0.27 1.24%14 0.045 0.038 88.06 95.05 116.75 21.7 116.81 116.54 0.27 1.24%
15 0.045 0.038 88.1 95.03 116.61 21.58 116.77 116.39 0.38 1.75%15 0.045 0.038 88.1 95.03 116.61 21.58 116.77 116.39 0.38 1.75%
16 0.045 0.038 87.61 94.57 116.18 21.61 116.27 116.01 0.26 1.20%16 0.045 0.038 87.61 94.57 116.18 21.61 116.27 116.01 0.26 1.20%
17 0.045 0.038 87.62 94.58 116.25 21.67 116.38 116.08 0.3 1.38%17 0.045 0.038 87.62 94.58 116.25 21.67 116.38 116.08 0.3 1.38%
18 0.045 0.038 88.13 95.04 116.78 21.74 116.87 116.63 0.24 1.11%18 0.045 0.038 88.13 95.04 116.78 21.74 116.87 116.63 0.24 1.11%
19 0.045 0.038 87.66 94.55 116.27 21.72 116.39 115.99 0.4 1.84%19 0.045 0.038 87.66 94.55 116.27 21.72 116.39 115.99 0.4 1.84%
20 0.045 0.038 88.12 95.02 116.74 21.72 116.86 116.48 0.38 1.75% 最大值 20 0.045 0.038 88.12 95.02 116.74 21.72 116.86 116.48 0.38 1.75% Maximum
0.045 0.038 88.13 95.14 116.78 21.74 116.87 116.63 0.64 2.95% 最小值  0.045 0.038 88.13 95.14 116.78 21.74 116.87 116.63 0.64 2.95% Minimum
0.045 0.038 87.61 94.55 116.18 21.56 116.27 115.99 0.24 1.11% 平均值  0.045 0.038 87.61 94.55 116.18 21.56 116.27 115.99 0.24 1.11% Average
0.045 0.038 87.91 94.87 116.52 21.65 116.63 116.30 0.37 1.69% 21 0.045 0.041 87 94.84 116.4 21.65 116.54 116.13 0.49 2.26%0.045 0.038 87.91 94.87 116.52 21.65 116.63 116.30 0.37 1.69% 21 0.045 0.041 87 94.84 116.4 21.65 116.54 116.13 0.49 2.26%
22 0.045 0.039 86.8 94.6 116.26 21.7 116.36 115.72 0.48 2.21%22 0.045 0.039 86.8 94.6 116.26 21.7 116.36 115.72 0.48 2.21%
23 0.045 0.038 87.57 94.58 116.15 21.64 116.29 116.05 0.57 2.63%23 0.045 0.038 87.57 94.58 116.15 21.64 116.29 116.05 0.57 2.63%
24 0.046 0.038 87.38 94.75 116.45 21.55 116.51 116.24 0.37 1.70%24 0.046 0.038 87.38 94.75 116.45 21.55 116.51 116.24 0.37 1.70%
25 0.045 0.038 87.44 94.73 116.31 21.63 116.47 116.09 0.46 2.12%25 0.045 0.038 87.44 94.73 116.31 21.63 116.47 116.09 0.46 2.12%
26 0.045 0.037 87.56 94.27 115.88 21.71 115.97 115.71 0.39 1.80%26 0.045 0.037 87.56 94.27 115.88 21.71 115.97 115.71 0.39 1.80%
27 0.045 0.038 94.28 115.95 21.66 116.08 115.78 0.4 1.84%27 0.045 0.038 94.28 115.95 21.66 116.08 115.78 0.4 1.84%
28 0.045 0.039 ∞ ∞ 94.74 116.48 21.7 116.57 116.33 0.44 2.03%28 0.045 0.039 ∞ ∞ 94.74 116.48 21.7 116.57 116.33 0.44 2.03%
29 0.045 0.038 87.35 94.25 115.97 21.73 116.09 115.69 0.58 2.67%29 0.045 0.038 87.35 94.25 115.97 21.73 116.09 115.69 0.58 2.67%
30 0.045 0.04 86.92 94.72 116.44 21.64 116.56 116.18 0.46 2.12% 最大值 30 0.045 0.04 86.92 94.72 116.44 21.64 116.56 116.18 0.46 2.12% Maximum
0.046 0.041 87.57 94.84 116.48 21.73 116.57 116.33 0.58 2.67% 最小值  0.046 0.041 87.57 94.84 116.48 21.73 116.57 116.33 0.58 2.67% Minimum
0.045 0.037 86.8 94.25 115.88 21.55 115.97 115.69 0.37 1.70% 平均值  0.045 0.037 86.8 94.25 115.88 21.55 115.97 115.69 0.37 1.70% average
0.045 0.039 87.20 94.57 116.22 21.66 116.33 116.00 0.47 2.15% 试验 3：倍率容量比对 以下试验 2中的检验电池样品以相同试验工艺对进行倍率容量试验比对。 得到表二所示的表格： 表二：倍率容量比对表 分容后 分容后 中值电 序号 0.5C容量 0.5C平台 1C容量 1C平台 30C容量  0.045 0.039 87.20 94.57 116.22 21.66 116.33 116.00 0.47 2.15% Test 3: Ratio capacity ratio comparison The test battery samples in the following test 2 were subjected to the same capacity test for the same capacity test. Obtain the table shown in Table 2: Table 2: Ratio capacity ratio table After content separation After volume capacity Median electricity No. 0.5C capacity 0.5C platform 1C capacity 1C platform 30C capacity
厚度 内阻 压  Thickness internal pressure
1 4568.1 116.9 4606.6 58.9 7.21 1 4544.3 3.5381 4568.1 116.9 4606.6 58.9 7.21 1 4544.3 3.538
2 4623 118.9 4596.8 58.9 7.2 1.1 4537.7 3.5412 4623 118.9 4596.8 58.9 7.2 1.1 4537.7 3.541
3 4715.3 120.9 4694.9 58.9 7.25 1.1 4544.9 3.5373 4715.3 120.9 4694.9 58.9 7.25 1.1 4544.9 3.537
4 4650.8 118.9 4697.2 59.9 7.33 1 4584.1 3.5364 4650.8 118.9 4697.2 59.9 7.33 1 4584.1 3.536
5 4637.6 118.9 4686.5 59.9 7.25 1 4584.1 3.5435 4637.6 118.9 4686.5 59.9 7.25 1 4584.1 3.543
6 4704.2 120.4 4701.8 59.9 7.33 1.1 4584.1 3.5466 4704.2 120.4 4701.8 59.9 7.33 1.1 4584.1 3.546
7 4652.1 119.4 4622.4 59.4 7.19 1 4510.8 3.5397 4652.1 119.4 4622.4 59.4 7.19 1 4510.8 3.539
8 4601.8 117.9 4640.6 59.4 7.31 1 4547.4 3.5478 4601.8 117.9 4640.6 59.4 7.31 1 4547.4 3.547
9 4676.8 119.9 4651 59.4 7.24 1.1 4547.4 3.5379 4676.8 119.9 4651 59.4 7.24 1.1 4547.4 3.537
10 4477.2 114.9 4520 57.9 7.17 1 4437.4 3.544 最大值 10 4477.2 114.9 4520 57.9 7.17 1 4437.4 3.544 Maximum
4715.3 120.9 4701.8 59.9 7.33 1.1 4584.1 3.547 最小值  4715.3 120.9 4701.8 59.9 7.33 1.1 4584.1 3.547 Minimum
4477.2 114.9 4520 57.9 7.17 1 4437.4 3.536 平均值  4477.2 114.9 4520 57.9 7.17 1 4437.4 3.536 Average
4625.0 118.6 4636.6 59.2 7.2 1.0 4535.2 3.542 11 4657.5 119.3 4643.5 59.4 7.54 1.1 4544.3 3.5384625.0 118.6 4636.6 59.2 7.2 1.0 4535.2 3.542 11 4657.5 119.3 4643.5 59.4 7.54 1.1 4544.3 3.538
12 4636.3 118.8 4627.9 59.4 7.53 1.1 4546.8 3.53712 4636.3 118.8 4627.9 59.4 7.53 1.1 4546.8 3.537
13 4685.9 120.3 4676.1 59.9 7.51 1.1 4544.5 3.53613 4685.9 120.3 4676.1 59.9 7.51 1.1 4544.5 3.536
14 4693 120.3 4688.7 59.9 7.55 1.1 4510.8 3.52714 4693 120.3 4688.7 59.9 7.55 1.1 4510.8 3.527
15 4687.4 120.3 4685.3 59.9 7.55 1.1 4547.4 3.53715 4687.4 120.3 4685.3 59.9 7.55 1.1 4547.4 3.537
16 4625.6 118.8 4617.7 58.9 7.55 1.1 4437.4 3.53816 4625.6 118.8 4617.7 58.9 7.55 1.1 4437.4 3.538
17 4632.7 118.8 4628.3 59.4 7.56 1 4254.1 3.53217 4632.7 118.8 4628.3 59.4 7.56 1 4254.1 3.532
18 4695.8 120.3 4692.9 59.9 7.54 1 4547.4 3.5418 4695.8 120.3 4692.9 59.9 7.54 1 4547.4 3.54
19 4643 119.3 4634.1 59.4 7.61 1 4474.1 3.53219 4643 119.3 4634.1 59.4 7.61 1 4474.1 3.532
20 4691.3 120.3 4683 59.9 7.61 1 4544.8 3.537 最大值 20 4691.3 120.3 4683 59.9 7.61 1 4544.8 3.537 Maximum
4695.8 120.3 4692.9 59.9 7.61 1.1 4547.4 3.54 最小值  4695.8 120.3 4692.9 59.9 7.61 1.1 4547.4 3.54 Minimum
4625.6 118.8 4617.7 58.9 7.51 1 4254.1 3.527 平均值  4625.6 118.8 4617.7 58.9 7.51 1 4254.1 3.527 Average
4664.2 119.6 4657.3 59.6 7.6 1.1 4473.7 3.535 4664.2 119.6 4657.3 59.6 7.6 1.1 4473.7 3.535
21 4649.5 118.6 4637.5 58.9 7.44 1.1 4538.3 3.53521 4649.5 118.6 4637.5 58.9 7.44 1.1 4538.3 3.535
22 4628.3 118.1 4621.9 58.9 7.43 1.1 4540.8 3.53422 4628.3 118.1 4621.9 58.9 7.43 1.1 4540.8 3.534
23 4677.9 119.6 4670.1 59.4 7.41 1 4538.5 3.53623 4677.9 119.6 4670.1 59.4 7.41 1 4538.5 3.536
24 4685 119.6 4682.7 59.4 7.45 1 4504.8 3.52424 4685 119.6 4682.7 59.4 7.45 1 4504.8 3.524
25 4679.4 119.6 4679.3 59.4 7.45 1 4541.4 3.53425 4679.4 119.6 4679.3 59.4 7.45 1 4541.4 3.534
26 4617.6 118.1 4611.7 58.4 7.45 1.1 4431.4 3.53526 4617.6 118.1 4611.7 58.4 7.45 1.1 4431.4 3.535
27 4624.7 118.1 4622.3 58.9 7.46 1 4248.1 3.52927 4624.7 118.1 4622.3 58.9 7.46 1 4248.1 3.529
28 4687.8 119.6 4686.9 59.4 7.44 1 4541.4 3.53728 4687.8 119.6 4686.9 59.4 7.44 1 4541.4 3.537
29 4635 118.6 4628.1 58.9 7.51 1.1 4468.1 3.52929 4635 118.6 4628.1 58.9 7.51 1.1 4468.1 3.529
30 4683.3 119.6 4677 59.4 7.51 1 4538.8 3.534 最大值 30 4683.3 119.6 4677 59.4 7.51 1 4538.8 3.534 Maximum
4687.8 119.6 4686.9 59.4 7.51 1.1 4541.4 3.537 最小值  4687.8 119.6 4686.9 59.4 7.51 1.1 4541.4 3.537 Minimum
4617.6 118.1 4611.7 58.4 7.41 1 4248.1 3.524 平均值  4617.6 118.1 4611.7 58.4 7.41 1 4248.1 3.524 Average
4656.16 118.93 4651.34 59.07 7.46 1.0 4473.43 3.532 试验 3：循环性能比对 以试验 2中的样品进行循环性能试验比对，得图 6、 7所示的循环性能变 化示意图 ，其中图 6为未加无尘布的电池的循环性能曲线图 ，图中曲线 5、 6 分别对应该类型电池的样品 5、 6；其中图 6为加一片无尘布的电池的循环性 能曲线图 ，图中曲线 11、 12分别对应该类型电池的样品 11、 12。 参见图 6、 7以及表三可见，将本实施例技术方案应用至高倍率的大容量 锂离子电池中 ，可以大大降低电池在制备的循环过程中的失液量，有利于提高 电池在制备过程中的循环性能。 4656.16 118.93 4651.34 59.07 7.46 1.0 4473.43 3.532 Test 3: Circulating performance comparison The cycle performance test of the sample in test 2 is compared, and the cycle performance change diagrams shown in Figs. 6 and 7 are obtained, wherein Fig. 6 is a non-dust-free cloth. The cycle performance curve of the battery, the curves 5 and 6 in the figure correspond to the samples 5 and 6 of the type battery respectively; wherein Fig. 6 is the cycle performance curve of the battery with a piece of clean cloth, the curves 11 and 12 respectively Samples 11, 12 of type battery should be used. Referring to FIG. 6, 7 and Table 3, the technical solution of the embodiment can be applied to a high-capacity large-capacity lithium ion battery, which can greatly reduce the amount of liquid loss of the battery during the preparation process, and is beneficial to improve. The cycle performance of the battery during preparation.
作为本实施例的示意，还可以进一步在本实施的电池的电芯体的壳体内固 定设置胶囊，并且在胶囊中封装有电解液。这样，当用户在将本实施例的电池 应用一定时间后，当电池的容量衰减时，用户可以通过按压电芯体表面的方式 挤破电解液胶囊，从而使胶囊中的电解液补充到电芯体中 ，参与电解反应，有 利于锂离子电池的容量的恢复，有利于提高电池的循环性能。  As an illustration of the present embodiment, it is also possible to further provide a capsule in the housing of the battery body of the battery of the present embodiment, and to encapsulate the electrolyte in the capsule. In this way, when the user applies the battery of the embodiment for a certain period of time, when the capacity of the battery is attenuated, the user can squeeze the electrolyte capsule by pressing the surface of the battery body, thereby replenishing the electrolyte in the capsule. In the core, participating in the electrolysis reaction is beneficial to the recovery of the capacity of the lithium ion battery, and is beneficial to improving the cycle performance of the battery.
作为本实施例的示意，可以但不限于在电芯体的壳体的转角部位设置上述 的胶囊，该胶囊的数量可以为一个、 两个、 三个或者四个或者更多，具体可以 根据实际需要以及电池的尺寸设置。  As an illustration of the embodiment, the capsule may be disposed at a corner portion of the housing of the battery body, and the number of the capsules may be one, two, three or four or more, depending on the actual Need and battery size settings.
以上对本发明实施例所提供的技术方案进行了详细介绍，本文中应用了具 体个例对本发明实施例的原理以及实施方式进行了阐述，以上实施例的说明只 适用于帮助理解本发明实施例的原理；同时，对于本领域的一般技术人员 ，依 据本发明实施例，在具体实施方式以及应用范围上均会有改变之处，综上所述， 本说明书内容不应理解为对本发明的限制。  The technical solutions provided by the embodiments of the present invention are described in detail above. The principles and implementation manners of the embodiments of the present invention are described in the following. The description of the foregoing embodiments is only applicable to help understand the embodiments of the present invention. The present invention is not limited by the scope of the present invention, and the description of the present invention is not limited to the details of the present invention.

Claims

权 利 要 求 Rights request
1、 一种锂离子电池，其特征是，包括：壳体、 电芯体、 电解液， 所述电芯体以及电解液封装在所述壳体内 ，所述电解液充满所述壳体内 腔，浸泡所述电芯体并且渗入所述电芯体； 1. A lithium-ion battery, characterized by comprising: a casing, a battery core body, and an electrolyte solution; the battery core body and the electrolyte solution are packaged in the casing; the electrolyte solution fills the inner cavity of the casing; Soak the battery core body and penetrate into the battery core body;
所述电芯体包括：隔膜、 正极片、 负极片以及无尘布， The battery core body includes: separator, positive electrode sheet, negative electrode sheet and dust-free cloth,
在任一正极片、 负极片之间分别间隔有一所述各隔膜， There is a separator as described above between any positive electrode sheet and negative electrode sheet,
所述无尘布位于所述电芯体内部。 The dust-free cloth is located inside the battery core body.
2、 根据权 1所述的锂离子电池，其特征是， 2. The lithium-ion battery according to claim 1, characterized by:
所述电芯体为层叠体，所述层叠体包括层叠的各所述负极片、 隔膜、 正 极片，所述无尘布层叠在所述层叠体的任意一层叠层。 The electric core body is a laminated body, and the laminated body includes the stacked negative electrode sheets, separators, and positive electrode sheets, and the dust-free cloth is laminated on any one layer of the laminated body.
3、 根据权 2所述的锂离子电池，其特征是， 3. The lithium-ion battery according to claim 2, characterized by:
所述无尘布的尺寸与所述正极片的尺寸一致。 The size of the dust-free cloth is consistent with the size of the positive electrode sheet.
4、 根据权 2所述的锂离子电池，其特征是， 4. The lithium-ion battery according to claim 2, characterized by:
所述无尘布为至少两片。 The number of dust-free cloths is at least two.
5、 根据权 1所述的锂离子电池，其特征是， 5. The lithium-ion battery according to claim 1, characterized by:
所述电芯体为卷绕体， The battery core body is a winding body,
所述卷绕体由一所述负极片、 一所述隔膜、 一所述正极片、 以及至少一 所述无尘布层叠后由内到外卷绕组成。 The winding body is composed of a negative electrode sheet, a separator, a positive electrode sheet, and at least one dust-free cloth, which are laminated and wound from the inside to the outside.
6、 根据权 5所述的锂离子电池，其特征是， 6. The lithium-ion battery according to claim 5, characterized by:
所述无尘布的宽度与所述卷绕体的宽度一致，长度与所述正极片的宽度 一致。 The width of the dust-free cloth is consistent with the width of the winding body, and the length is consistent with the width of the positive electrode sheet.
7、 根据权 5所述的锂离子电池，其特征是， 所述无尘布为至少两片。 7. The lithium-ion battery according to claim 5, characterized by: The number of lint-free cloths is at least two.
8、 根据权 1所述的锂离子电池，其特征是，还包括胶囊， 在所述胶囊中封装有电解液， 8. The lithium-ion battery according to claim 1, further comprising a capsule, in which the electrolyte is encapsulated,
所述胶囊固定在所述壳体内 ，位于所述电芯体外。 The capsule is fixed in the housing and located outside the battery core.
9、 根据权 8所述的锂离子电池，其特征是， 9. The lithium-ion battery according to claim 8, which is characterized by:
所述胶囊固定在所述壳体内的转角位置。 The capsule is fixed at a corner position within the housing.
10、 根据权 8或 9所述的锂离子电池，其特征是， 所述胶囊为至少两个。 10. The lithium-ion battery according to claim 8 or 9, characterized in that there are at least two capsules.
PCT/CN2013/089743 2013-12-17 2013-12-17 Lithium-ion battery provided with non-dust cloth WO2015089749A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/089743 WO2015089749A1 (en) 2013-12-17 2013-12-17 Lithium-ion battery provided with non-dust cloth

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/089743 WO2015089749A1 (en) 2013-12-17 2013-12-17 Lithium-ion battery provided with non-dust cloth

Publications (1)

Publication Number Publication Date
WO2015089749A1 true WO2015089749A1 (en) 2015-06-25

Family

ID=53401937

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/089743 WO2015089749A1 (en) 2013-12-17 2013-12-17 Lithium-ion battery provided with non-dust cloth

Country Status (1)

Country Link
WO (1) WO2015089749A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110376111A (en) * 2019-07-17 2019-10-25 惠州亿纬锂能股份有限公司 A kind of judgment method and its auxiliary mould of lithium battery coiling core sepage effect

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5468575A (en) * 1992-12-17 1995-11-21 Accumulatorenfabrik Sonnenschein Gmbh Maintenance-free high capacity lead battery or accumulator
CN201918456U (en) * 2010-10-21 2011-08-03 力佳电源科技(深圳)有限公司 Lithium battery composite diaphragm and diaphragm bag
WO2013069622A1 (en) * 2011-11-10 2013-05-16 三菱自動車工業株式会社 Secondary cell
CN103682241A (en) * 2013-12-17 2014-03-26 深圳市格瑞普电池有限公司 Lithium ion battery provided with non-dust cloths

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5468575A (en) * 1992-12-17 1995-11-21 Accumulatorenfabrik Sonnenschein Gmbh Maintenance-free high capacity lead battery or accumulator
CN201918456U (en) * 2010-10-21 2011-08-03 力佳电源科技(深圳)有限公司 Lithium battery composite diaphragm and diaphragm bag
WO2013069622A1 (en) * 2011-11-10 2013-05-16 三菱自動車工業株式会社 Secondary cell
CN103682241A (en) * 2013-12-17 2014-03-26 深圳市格瑞普电池有限公司 Lithium ion battery provided with non-dust cloths

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110376111A (en) * 2019-07-17 2019-10-25 惠州亿纬锂能股份有限公司 A kind of judgment method and its auxiliary mould of lithium battery coiling core sepage effect
CN110376111B (en) * 2019-07-17 2022-05-17 惠州亿纬锂能股份有限公司 Method for judging liquid seepage effect of lithium battery roll core and auxiliary tool thereof

Similar Documents

Publication Publication Date Title
CN105914037B (en) Electrical storage device and its manufacturing method
CN105470515B (en) A kind of safe lithium ion power battery anode and the lithium ion battery containing the positive pole
TW523953B (en) Pocketed electrode plate for use in lithium ion secondary battery, its manufacturing method and lithium ion secondary battery using the same
CN104934642A (en) Lithium ion battery core and lithium ion battery
JP2016039126A (en) Electrochemical energy storage device
JP2018505517A (en) Electrochemical energy storage device
WO2010124635A1 (en) Lithium-ion power battery
CN103811711A (en) Lithium ion battery with capsule
TW201203299A (en) Electric double layer capacitor
JP2009146602A (en) Method for manufacturing lamination type secondary battery
CN102376984B (en) Ultrathin rechargeable battery and manufacturing process thereof
WO2014032404A1 (en) Electrode material and preparation method thereof as well as super-capacitor based on the same
CN101350428B (en) Lithium ion battery and method for assembling the same
CN105355957B (en) Electrochemical cell and method of making same
CN203746967U (en) Lithium ion battery with capsule
WO2015089749A1 (en) Lithium-ion battery provided with non-dust cloth
CN102637848A (en) Preparation method of lithium ion battery pole piece
CN107958788A (en) One kind contacts embedding lithium type lithium ion super capacitor
CN111463366B (en) Casing and power battery
JP2015162457A (en) Material capable of absorbing carbon monoxide and carbon dioxide, power storage device arranged by use thereof, and method for producing material capable of absorbing carbon monoxide and carbon dioxide
CN207602415U (en) Lithium ion super capacitor
CN106025369A (en) Lithium ion battery
CN109887756A (en) A kind of lamination type electric core and the coin shape lithium-ion capacitor with the battery core
CN103682241A (en) Lithium ion battery provided with non-dust cloths
CN112713301B (en) Energy storage device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13899939

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13899939

Country of ref document: EP

Kind code of ref document: A1