摘要：【中文】本发明提出的一种精确监测锂离子电池循环寿命的充放电测试方法，包括以下步骤：S1、获取电芯初始容量C₀和直流内阻DCR₀；S2、对电池进行周期性充放电，每一个充放电周期内包含a次循环充放，且前a‑1次充放电时，以1C/1C循环充放；在第a次充放电时，以1C充电后，首先以1C放电至截止电压，再静置第一时间，然后以0.1C放电至截止电压；再静置第一时间，再以0.01C放电至截止电压；S3、进行k个充放电周期后检测电芯当前容量C_n和直流内阻DCR_n；a≧10k；S4、根据当前容量C_n和直流内阻DCR_n判断电芯循环寿命是否终止；是，则记录电池循环寿命；否，则返回步骤S2。本发明能够均匀地消除循环累积的极化，使负极脱出更多的有效锂保证循环，使锂离子电池循环寿命测试结果提升30％以上。 【EN】The invention provides a charge-discharge test method for accurately monitoring the cycle life of a lithium ion battery, which comprises the following steps: s1, obtaining initial capacity C of battery cell₀And DC internal resistance DCR₀(ii) a S2, carrying out periodic charging and discharging on the battery, wherein each charging and discharging period comprises a times of cyclic charging and discharging, and the cyclic charging and discharging is carried out at 1C/1C during the first a-1 times of charging and discharging; in the a-th charging and discharging, after 1C charging, discharging to cut-off voltage by 1C, standing for the first time, and then discharging to cut-off voltage by 0.1C; standing for the first time, and discharging to cut-off voltage at 0.01 ℃; s3, detecting the current capacity C of the battery cell after k charge and discharge cycles_nAnd DC internal resistance DCR_n(ii) a a ≧ 10 k; s4, according to the current capacity C_nAnd DC internal resistance DCR_nJudging whether the cycle life of the battery cell is terminated; if yes, recording the cycle life of the battery; otherwise, the process returns to step S2. The invention can eliminate circulation uniformlyAccumulated polarization enables the negative electrode to separate more effective lithium to ensure circulation, and the cycle life test result of the lithium ion battery is improved by more than 30%.

摘要：【中文】本发明公开了一种共轭梯形聚合物‑碳纳米管复合材料，共轭梯形聚合物包覆于碳纳米管外壁。本发明还公开了上述共轭梯形聚合物‑碳纳米管复合材料的制备方法，包括如下步骤：将共轭梯形聚合物与碳纳米管均匀分散在甲磺酸中得到混合液；向混合液中滴加水并搅拌，当生成絮状物后停止滴加水，洗涤絮状物得到共轭梯形聚合物‑碳纳米管复合材料。本发明还公开了上述共轭梯形聚合物‑碳纳米管复合材料在锂离子电池中的应用。本发明以碳纳米管为支撑，共轭梯形聚合物沿着碳纳米管外管壁生长，形成包覆结构，碳纳米管提供很好的导电通道，增强本发明的导电性，提高其循环性能和倍率特性，用作锂离子电池负极，提高了其电化学性能。 【EN】The invention discloses a conjugated trapezoidal polymer-carbon nanotube composite material, wherein the conjugated trapezoidal polymer is coated on the outer wall of a carbon nanotube. The invention also discloses a preparation method of the conjugated trapezoidal polymer-carbon nanotube composite material, which comprises the following steps: uniformly dispersing the conjugated trapezoidal polymer and the carbon nano tube in methanesulfonic acid to obtain a mixed solution; and (3) adding water dropwise into the mixed solution, stirring, stopping adding water dropwise after the floccule is generated, and washing the floccule to obtain the conjugated trapezoidal polymer-carbon nano tube composite material. The invention also discloses application of the conjugated trapezoidal polymer-carbon nanotube composite material in a lithium ion battery. The carbon nano tube is used as a support, the conjugated trapezoidal polymer grows along the outer tube wall of the carbon nano tube to form a coating structure, the carbon nano tube provides a good conductive channel, the conductivity of the carbon nano tube is enhanced, the cycle performance and the rate characteristic of the carbon nano tube are improved, and the carbon nano tube is used as a cathode of a lithium ion battery and improves the electrochemical performance of the lithium ion battery.

摘要：【中文】本发明公开了一种聚丁二酸乙二醇酯微球乳液涂覆型锂电池隔膜的制备方法，首先制备聚丁二酸乙二醇酯微球乳液，然后将聚丁二酸乙二醇酯微球乳液涂覆于聚烯烃微孔隔膜的表面并烘干，即得锂电池隔膜。本发明的PBS微球乳液涂覆在聚烯烃微孔隔膜的表面上后，PBS微球乳液形成有机高分子微球层，在电池正常使用时，有机高分子微球间的孔隙，保证了锂离子的有效传输，在电池内部温度升高并达到有机高分子微球的熔融温度时，有机高分子微球熔融成膜并堵塞聚烯烃基膜上的微孔，切断电池内锂离子传输，实现隔膜的热关断，阻止了电池内温度的进一步上升，大幅度提高了锂离子电池的安全性。 【EN】The invention discloses a preparation method of a polyethylene glycol succinate microsphere emulsion coating type lithium battery diaphragm. After the PBS microsphere emulsion is coated on the surface of the polyolefin microporous diaphragm, the PBS microsphere emulsion forms an organic polymer microsphere layer, when the battery is normally used, pores among the organic polymer microspheres ensure effective transmission of lithium ions, when the internal temperature of the battery rises and reaches the melting temperature of the organic polymer microspheres, the organic polymer microspheres are melted to form a film and block micropores on a polyolefin base film, the transmission of the lithium ions in the battery is cut off, the thermal shutdown of the diaphragm is realized, the further rise of the temperature in the battery is prevented, and the safety of the lithium ion battery is greatly improved.

摘要：【中文】本发明提供一种导电型聚合物包覆硅基负极材料的制备方法，包括以下步骤，S1、将纳米硅粉和乙醇水溶液进行超声分散，加入酸性溶液，在室温充分搅拌、离心、洗涤、干燥，得纳米硅颗粒；S2、将纳米银粉和纳米硅颗粒放入球磨罐中，进行球磨，取出球磨后得到的复合物并干燥，将干燥后的复合物进行高温处理，冷却取出，即获得纳米硅银复合材料；S3、将导电聚合物和纳米硅银复合材料进行超声混合，在搅拌后得到的混合溶液中加入氧化剂即可得三元复合材料。本发明所述的制备方法采用的原料丰富且广泛易得、合成简单，有较高导电性等优点，导电聚合物不仅具有较好的导电性，而且具有一定弹性和柔韧性，利用导电聚合物的优点可用来修饰硅基电极。 【EN】The invention provides a preparation method of a conductive polymer coated silicon-based negative electrode material, which comprises the following steps of S1, carrying out ultrasonic dispersion on nano silicon powder and ethanol water solution, adding acid solution, fully stirring at room temperature, centrifuging, washing and drying to obtain nano silicon particles; s2, putting the nano silver powder and the nano silicon particles into a ball milling tank, carrying out ball milling, taking out a compound obtained after ball milling, drying, carrying out high-temperature treatment on the dried compound, cooling and taking out the compound to obtain the nano silicon-silver composite material; and S3, ultrasonically mixing the conductive polymer and the nano silicon-silver composite material, and adding an oxidant into a mixed solution obtained after stirring to obtain the ternary composite material. The preparation method has the advantages of abundant, wide and easily available raw materials, simple synthesis, high conductivity and the like, and the conductive polymer not only has high conductivity, but also has certain elasticity and flexibility, and can be used for modifying the silicon-based electrode by utilizing the advantages of the conductive polymer.

摘要：【中文】本发明公开了一种双功能电解液添加剂及含有该添加剂的锂离子电池电解液，所述双功能电解液添加剂为五元或六元含N杂环基团取代的磷酸酯或亚磷酸酯类化合物，五元或六元含N杂环基团为呋喃、噻吩、吡咯、噻唑、咪唑、吡啶、吡嗪、嘧啶、哒嗪基团中的一种。含有该电解液添加剂的电池电解液时，一方面在SEI膜中引入五元或六元含N杂环基团，提高了离子迁移率，降低了SEI膜的成膜阻抗；另一方面由于P‑O键以及含N杂环基团中化学键相对稳定，使得高温条件下成膜稳定性较高，提高了锂离子电池尤其是高镍三元材料电池的高温循环性能。本发明制备的电解液添加剂应用于电池电解液时成本较低，使用方便，具有极好的产业化应用前景。 【EN】The invention discloses a bifunctional electrolyte additive and a lithium ion battery electrolyte containing the same, wherein the bifunctional electrolyte additive is a phosphate ester or phosphite ester compound substituted by a five-membered or six-membered N-containing heterocyclic group, and the five-membered or six-membered N-containing heterocyclic group is one of furan, thiophene, pyrrole, thiazole, imidazole, pyridine, pyrazine, pyrimidine and pyridazine groups. When the battery electrolyte containing the electrolyte additive is used, on one hand, a five-membered or six-membered N-containing heterocyclic group is introduced into an SEI film, so that the ion mobility is improved, and the film forming impedance of the SEI film is reduced; on the other hand, the chemical bonds in the P-O bond and the N-containing heterocyclic group are relatively stable, so that the stability of the formed film is higher under the high-temperature condition, and the high-temperature cycle performance of the lithium ion battery, particularly the high-nickel ternary material battery, is improved. The electrolyte additive prepared by the invention has low cost and convenient use when being applied to battery electrolyte, and has excellent industrial application prospect.

摘要：【中文】本发明公开了一种倍率型锂离子电池硅复合氧化物材料的制备方法，包括以下步骤，（1）分散：通过表面活性剂和碳纳米管制备碳纳米管分散液；（2）包覆：在步骤（1）制备的碳纳米管分散液中加入正硅酸乙酯，室温下搅拌反应，干燥后得到二氧化硅包覆的碳纳米管；(3)化学沉积：对步骤（2）得到的二氧化硅碳纳米管采用化学沉积法，制备碳包覆的二氧化硅碳纳米管；（4）气相反应：将步骤（3）制备的碳包覆的二氧化硅碳纳米管和镁粉进行配比研磨，在惰性气体保护下，加热，恒温后冷却至室温，再酸洗、洗涤、干燥后，即得倍率型锂离子电池硅复合氧化物材料。本发明制作的硅复合氧化物材料的倍率性能和循环性能优异，制作过程简单实用。 【EN】The invention discloses a preparation method of a multiplying power type lithium ion battery silicon composite oxide material, which comprises the following steps of (1) dispersing: preparing a carbon nanotube dispersion solution by using a surfactant and a carbon nanotube; (2) coating: adding ethyl orthosilicate into the carbon nano tube dispersion liquid prepared in the step (1), stirring at room temperature for reaction, and drying to obtain a carbon nano tube coated with silicon dioxide; (3) chemical deposition: preparing the carbon-coated silicon dioxide carbon nanotube from the silicon dioxide carbon nanotube obtained in the step (2) by adopting a chemical deposition method; (4) gas-phase reaction: and (4) grinding the carbon-coated silicon dioxide carbon nano tube prepared in the step (3) and magnesium powder in proportion, heating under the protection of inert gas, cooling to room temperature after keeping the temperature constant, and then pickling, washing and drying to obtain the multiplying power type lithium ion battery silicon composite oxide material. The silicon composite oxide material prepared by the invention has excellent rate capability and cycle performance, and the preparation process is simple and practical.

摘要：【中文】本发明公开了一种锂离子电池石墨负极材料及其制备方法，其中所述锂离子电池石墨负极材料中D50为7.5~8.5μm、D90为14~16μm、及D100为21~26μm，且所述锂离子电池石墨负极材料的BET比表面积为2.0~2.3 m²/g、振实密度为1.0~1.2g/cm²。本发明制备的锂离子电池石墨负极材料具有优异的低温和倍率性能，二次造粒可将更小颗粒的一次粒子粘结起来，缩减锂离子在石墨晶体中的传输距离，铜粉和纳米导电碳经过石墨化工序后可包覆在石墨颗粒的表面，有效降低石墨表面的电荷传递阻抗，采用的树脂经过包覆和石墨化工序后，成为一种无定型碳，有效加快锂离子的扩散速率。 【EN】The invention discloses a graphite cathode material of a lithium ion battery and a preparation method thereof, wherein D50, D90 and D100 in the graphite cathode material of the lithium ion battery are respectively 7.5-8.5 mu m, 14-16 mu m and 21-26 mu m, and the BET specific surface area of the graphite cathode material of the lithium ion battery is 2.0-2.3 m²The tap density is 1.0-1.2 g/cm². The graphite cathode material of the lithium ion battery prepared by the invention has excellent low-temperature and rate capability, smaller primary particles can be bonded by secondary granulation, the transmission distance of lithium ions in graphite crystals is reduced, copper powder and nano conductive carbon can be coated on the surfaces of graphite particles after a graphitization process, the charge transfer impedance on the graphite surface is effectively reduced, and the adopted resin becomes amorphous carbon after the coating and graphitization processes, so that the expansion of the lithium ions is effectively acceleratedThe rate of dispersion.

摘要：【中文】本发明公开了一种锂离子电池的封装方法，包括以下步骤：S1、将包装膜加工成等腰梯形状结构；S2、在包装膜上加工出凹坑；S3、将电池卷芯放入凹坑内，并沿包装膜的中轴线对折包装膜；S4、热封边，以在包装膜内侧形成密封的密封空间；S5、在包装膜斜边所在的拐角处加工出注液口；S6、通过注液口向所述密封空间内注入电解液；S7、一封，以使注液口封闭；S8、电池化成；S9、二封，以在电池卷芯靠近包装膜斜边的一侧形成平行于包装膜中轴线的密封边；S10、沿密封边进行剪切，以去除斜边所在部位。本发明可以有效减少铝塑膜的用量，降低成本，并避免一封时出现电解液泄露的问题。 【EN】The invention discloses a packaging method of a lithium ion battery, which comprises the following steps: s1, processing the packaging film into an isosceles trapezoid structure; s2, processing a pit on the packaging film; s3, placing the battery roll core into the concave pit, and folding the packaging film in half along the central axis of the packaging film; s4, heat-sealing edges to form a sealed space inside the packaging film; s5, processing a liquid injection port at the corner where the bevel edge of the packaging film is located; s6, injecting electrolyte into the sealed space through the injection port; s7, sealing to seal the liquid injection port; s8, battery formation; s9, secondary sealing, wherein a sealing edge parallel to the central axis of the packaging film is formed on one side of the battery roll core close to the bevel edge of the packaging film; and S10, cutting along the sealing edge to remove the part with the bevel edge. The invention can effectively reduce the using amount of the aluminum plastic film, reduce the cost and avoid the problem of electrolyte leakage during one sealing.

摘要：【中文】本发明提出的一种新型柱状锂离子电池，所述电池为正六棱柱结构，正极极柱和负极极柱分别位于正六棱柱结构的两个端面上。通过本发明提出的新型柱状锂离子电池组成电池模组时，电池与电池之间通过面与面贴合的方式组装，能够有效的减少电池之间的空隙，充分利用电池包的空间，相对的提高电池包的体积能量密度，使得组装后的电池模组相比一般的圆柱锂离子电池模组具有更好的抗机械撞击能力。 【EN】The novel columnar lithium ion battery provided by the invention is of a regular hexagonal prism structure, and the anode pole and the cathode pole are respectively positioned on two end faces of the regular hexagonal prism structure. When the novel cylindrical lithium ion battery pack provided by the invention forms a battery module, the batteries are assembled in a surface-to-surface laminating mode, so that the gaps among the batteries can be effectively reduced, the space of the battery pack is fully utilized, and the volume energy density of the battery pack is relatively improved, so that the assembled battery module has better mechanical impact resistance compared with a common cylindrical lithium ion battery module.

摘要：【中文】本发明公开了一种负极粘结剂，由以下方法制备而成：将瓜尔豆胶混合溶液与功能单体混合搅拌后置于γ射线下进行辐照，对辐照所得产物洗涤后即可得到所述负极粘结剂；其中，所述瓜尔豆胶混合溶液按以下步骤制作而成：首先将瓜尔豆胶溶于乙醇溶液中进行分散，得到瓜尔豆胶分散液；向瓜尔豆胶分散液中加入纤维素醚，在40～60℃反应30～60min，即可得到瓜尔豆胶混合溶液。本发明先通过纤维素醚对瓜尔豆胶进行预处理，再通过辐照进行改性，使瓜尔豆胶的粘结性能最大化，在制备极片过程使用真空处理，以解决硅的体积膨胀效应，由此提高负负极片的循环性能，且使锂离子电池的库伦效率有明显地提升。 【EN】The invention discloses a negative electrode binder which is prepared by the following method: mixing and stirring the guar gum mixed solution and the functional monomer, then placing the mixture under gamma rays for irradiation, and washing a product obtained by irradiation to obtain the cathode binder; the guar gum mixed solution is prepared by the following steps: firstly, dissolving guar gum in an ethanol solution for dispersion to obtain a guar gum dispersion liquid; and adding cellulose ether into the guar gum dispersion liquid, and reacting at 40-60 ℃ for 30-60 min to obtain the guar gum mixed solution. According to the invention, the guar gum is pretreated by the cellulose ether, and then is modified by irradiation, so that the bonding property of the guar gum is maximized, and the vacuum treatment is used in the process of preparing the pole piece so as to solve the volume expansion effect of silicon, thereby improving the cycle performance of the negative pole piece and obviously improving the coulomb efficiency of the lithium ion battery.