Patents Assigned to SVOLT Energy Technology Co., Ltd
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Publication number: 20240162420Abstract: Provided is a preparation method for a layered cobalt-free positive electrode material, the method comprising the steps: (1) mixing a lithium salt, a nickel source, a manganese source, a dopant and a solvent, and subjecting same to wet ball milling to obtain a mixed slurry; (2) spray drying the mixed slurry to obtain a precursor; and (3) carrying out one instance of calcination on the precursor in an oxygen-containing atmosphere to obtain the layered cobalt-free positive electrode material. Further provided are a layered cobalt-free positive electrode material, which is obtained by the preparation method, and a lithium-ion battery containing the layered cobalt-free positive electrode material.Type: ApplicationFiled: March 22, 2022Publication date: May 16, 2024Applicant: Svolt Energy Technology Co., Ltd.Inventors: Hailong Pan, Zitan Li, Hongxin Yang
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Publication number: 20240150925Abstract: The present invention provides a single-crystal high-nickel positive electrode material and a preparation method therefor and an application thereof. The preparation method comprises the following steps: (1) mixing a precursor, a lithium source, and a nano oxide, and performing primary sintering treatment in an oxygen-containing atmosphere to obtain a primary sintered material; and (2) mixing the primary sintered material obtained in step (1) with a titanium source and a cobalt source, and performing secondary sintering treatment in an oxygen-containing atmosphere to obtain the single-crystal high-nickel positive electrode material. The present invention uses a Ti/Co co-coating method, the residual alkali amount of the prepared single-crystal high-nickel positive electrode material can be greatly reduced, and the capacity and the rate capability can also be kept at a high level, so that the technological process is reduced, and the cost is reduced.Type: ApplicationFiled: November 12, 2021Publication date: May 9, 2024Applicant: SVolt Energy Technology Co., Ltd.Inventors: Jiali Ma, Shutao Zhang, Zitan Li, Zhuang Wang, Yazhou Wang, Yan Bai, Hailong Pan
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Publication number: 20240120535Abstract: The present disclosure provides a gel electrolyte precursor and use thereof. The gel electrolyte precursor comprises a gel matrix monomer, a flexible additive, a polymerization initiator, and a lithium salt. The gel matrix monomer comprises an acrylonitrile-based monomer. The use of same in a semisolid battery achieves good electrical performance, and also reduces the amount of an electrolyte used. An acrylonitrile-based polymer obtained by the in-situ polymerization and gelation of an acrylonitrile-based monomer has good flame retardant performance and high voltage resistance, improving the safety performance of a battery.Type: ApplicationFiled: March 22, 2021Publication date: April 11, 2024Applicant: SVolt Energy Technology Co., Ltd.Inventors: Wenbin Lv, Suxiang Deng, Shaojie Chen, Hongxin Yang
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Publication number: 20240097100Abstract: Provided is a method for preparing a layered positive electrode material, comprising the following steps: (1) mixing layered nickel cobalt manganese hydroxide with a lithium source, carrying out primary sintering in an oxygen atmosphere, pulverizing and sieving to obtain a primary sintering product; and (2) carrying out secondary sintering on the primary sintering product in a sulfur dioxide atmosphere to obtain a layered positive electrode material, of which the chemical formula is NiaCobMnc(OH)2, wherein 0.3?a?0.95, 0.03?b?0.12, 0.01?c?0.10, and a+b+c=1. Also provided are a layered positive electrode material obtained by the preparation method and a lithium-ion battery comprising the layered positive electrode material.Type: ApplicationFiled: March 18, 2022Publication date: March 21, 2024Applicant: SVolt Energy Technology Co., Ltd.Inventors: Yan Bai, Shutao Zhang, Zhuang Wang, Hailong Pan, Yazhou Wang
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Publication number: 20240063361Abstract: The present disclosure provides a negative electrode, a preparation method therefor, and an application thereof. In the process of preparing a negative electrode of the present disclosure, a graphite material is mixed with a graphene-coated silicon-oxygen material, and the graphene-coated silicon-oxygen material is prepared by means of spray drying. The present disclosure not only uses the advantages of graphite in cycle life and low-temperature capacity retention, but also makes full use of the advantages of the silicon-oxygen material, thereby reducing the areal density and compaction density of a negative electrode, thereby significantly improving the cycle life of a battery.Type: ApplicationFiled: March 21, 2022Publication date: February 22, 2024Applicant: SVolt Energy Technology Co., Ltd.Inventors: Yang Dou, Shuaibin Lou, Jing Liu
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Publication number: 20230352731Abstract: Provided in the present disclosure are a gel electrolyte precursor and an application thereof. The gel electrolyte precursor comprises a gel skeleton monomer, a flexible additive, a crosslinking agent, a polymerization initiator, and a lithium salt. Applying same to a semi-solid battery can reduce the amount of electrolyte while ensuring the electrical performance of the battery, thereby achieving the purpose of improving battery safety performance.Type: ApplicationFiled: March 22, 2021Publication date: November 2, 2023Applicant: SVolt Energy Technology Co., Ltd.Inventors: Wenbin Lv, Suxiang Deng, Hongxin Yang
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Publication number: 20230335713Abstract: A positive electrode material, a preparation method therefor and a lithium ion battery. The positive electrode material has a core-shell structure, the core layer comprises a cobalt-free single crystal positive electrode active material, and the shell layer comprises LiAlO2 and LiFePO4. By coating the surface of the cobalt-free single crystal positive electrode active material with LiAlO2 and LiFePO4, the conductivity of the cobalt-free single crystal layered positive electrode material is improved, thereby improving the capacity, the rate and the cyclability of the material.Type: ApplicationFiled: December 11, 2020Publication date: October 19, 2023Applicant: SVolt Energy Technology Co., Ltd.Inventors: Qiqi Qiao, Weijun Jiang, Mingzhu Sun, Xinpei XU, Zetao Shi, Jiali MA, Pengfei Wang, Sixian Chen
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Publication number: 20230335793Abstract: The present disclosure provides a gel electrolyte precursor and use thereof. The gel electrolyte precursor comprises a gel matrix monomer, a flexible additive, a polymerization initiator, and a lithium salt. The gel matrix monomer comprises an acrylonitrile-based monomer. The use of same in a semisolid battery achieves good electrical performance, and also reduces the amount of an electrolyte used. An acrylonitrile-based polymer obtained by the in-situ polymerization and gelation of an acrylonitrile-based monomer has good flame retardant performance and high voltage resistance, improving the safety performance of a battery.Type: ApplicationFiled: March 22, 2021Publication date: October 19, 2023Applicant: SVolt Energy Technology Co., Ltd.Inventors: Wenbin Lv, Suxiang Deng, Shaojie Chen, Hongxin Yang
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Publication number: 20230307721Abstract: Disclosed are an electrolyte material, a preparation method therefor and the use thereof. The electrolyte material comprises a core and a shell covering the outside of the core, wherein the core comprises flame retardant particles, and the shell comprises an ion-conductive polymer, with the ion-conductive polymer comprising a combination of a lithium salt and a polymer electrolyte.Type: ApplicationFiled: February 24, 2021Publication date: September 28, 2023Applicant: SVolt Energy Technology Co., Ltd.Inventors: Wenbin Lv, Suxiang Deng, Shaojie Chen
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Publication number: 20230038758Abstract: An electrolyte of a lithium-ion secondary battery and an application thereof. The electrolyte of the lithium-ion secondary battery includes an organic solution, a lithium salt, and an additive, and the additive comprises a borate compound. The electrolyte can be better applied to low-cobalt or cobalt-free positive electrode materials, improve the high-temperature cycle and storage performance of the lithium-ion batteries, and inhibit gas generation during high-temperature storage, thereby improving the comprehensive performance of the battery.Type: ApplicationFiled: October 29, 2020Publication date: February 9, 2023Applicant: SVolt Energy Technology Co., Ltd.Inventor: Shaowei Feng
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Publication number: 20230041946Abstract: Provided are a cobalt-free positive electrode material for a lithium ion battery, a preparation method therefor and a lithium ion battery. The method for preparing the cobalt-free positive electrode material for the lithium ion battery comprises: mixing lithium nickel manganese oxide with sulfate, so as to obtain a first mixture; and reacting the first mixture at a predetermined temperature, so as to obtain the cobalt-free positive electrode material. The cobalt-free positive electrode material comprises lithium nickel manganese oxide and a cladding layer of an outer surface thereof, and the cladding layer comprises lithium sulphate. The lithium ion battery comprises the cobalt-free positive electrode material. The cobalt-free positive electrode material has a relatively high electrical performance and a relatively low alkali content.Type: ApplicationFiled: October 26, 2020Publication date: February 9, 2023Applicant: SVolt Energy Technology Co., Ltd.Inventors: Weijun Jiang, Qiqi Qiao, Xinpei Xu, Zetao Shi, Sixian Chen, Jiali Ma
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Publication number: 20230032775Abstract: Disclosed are a positive electrode plate, a preparation method therefor and the use thereof. The positive electrode plate comprises a current collector and an active substance layer formed on the current collector, wherein the active substance layer comprises a positive electrode active material, a conductive agent and a binder, with the binder comprising a polymer with the structural formula as shown in formula I, which polymer comprises chain segments a, b and c. The positive electrode plate not only has a low preparation cost, but can also significantly improve the high-temperature storage and high-temperature cycle performance of a lithium-ion battery.Type: ApplicationFiled: November 18, 2020Publication date: February 2, 2023Applicant: SVolt Energy Technology Co., Ltd.Inventors: Xing Ji, Bing Zhang, Jing Liu
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Publication number: 20230032851Abstract: A composite positive electrode material for a lithium ion battery, a preparation method therefor, and a use thereof. The composite positive electrode material comprises a positive electrode material core and a halide coating layer that is coated on the surface of the positive electrode material core, wherein halide comprises Li3YX6, and X is at least one among halogens. By means of the coating of the halide coating layer, the ionic conductivity and structural stability of the positive electrode material are greatly increased, which reduces the surface impedance of the material.Type: ApplicationFiled: December 11, 2020Publication date: February 2, 2023Applicant: SVolt Energy Technology Co., Ltd.Inventors: Xinpei Xu, Hongxin Yang, Weijun Jiang, Qiqi Qiao, Mingzhu Sun, Zetao Shi, Pengfei Wang, Jiali Ma, Sixian Chen
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Publication number: 20230036288Abstract: A cobalt-free single crystal composite material, and a preparation method therefor and a use thereof. The cobalt-free single crystal material is of a core-shell structure, the core layer is the cobalt-free single crystal material, and the shell layer is prepared from TiNb2O7 and conductive lithium salt. The TiNb2O7 and the conductive lithium salt are selected as materials of the shell layer to coat the cobalt-free single crystal material, thereby improving the lithium ion conductivity of the cobalt-free single crystal material, and further improving the capacity and the first effect of the material.Type: ApplicationFiled: December 11, 2020Publication date: February 2, 2023Applicant: SVOLT ENERGY TECHNOLOGY CO., LTD.Inventors: Pengfei Wang, Weijun Jiang, Qigi Qiao, Mingzhu Sun, Xinpei Xu, Zetao Shi, Jiali Ma, Sixian Chen
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Publication number: 20230026588Abstract: Provided in the present disclosure are a positive electrode material used for a lithium ion battery. The positive electrode material comprises substrate particles, a first cladding layer that covers the substrate particles, and a second cladding layer that covers the first cladding layer; the substrate particles contain LiNixMny CozM1-x-y-zO2; the first cladding layer contains lithium cobalt oxide; and the second cladding layer contains an oxide of a transition metal.Type: ApplicationFiled: October 27, 2020Publication date: January 26, 2023Applicant: SVOLT ENERGY TECHNOLOGY CO., LTD.Inventors: Shutao Zhang, Jinxin Zhu, Yan Bai, Hailong Pan, Zhuang Wang
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Publication number: 20230025787Abstract: A cobalt-free positive electrode material and a preparation method therefor, a lithium ion battery positive electrode, and a lithium ion battery, relating to the technical field of lithium ion batteries. The positive electrode material comprises a core and a shell covering the core, the core being a cobalt-free positive electrode material, the chemical formula of the core being LiNixMnyO2, wherein 0.55?x?0.95 and 0.05?y?0.45, and the shell is a coating agent and carbon. The present method can improve the dispersibility of the cobalt-free positive electrode material during the coating process, and can also improve the conductivity of the cobalt-free positive electrode material.Type: ApplicationFiled: December 8, 2020Publication date: January 26, 2023Applicant: Svolt Energy Technology Co., Ltd.Inventors: Qiqi Qiao, Weijun Jiang, Mingzhu Sun, Xinpei XU, Zetao Shi, Jiali MA, Sixian Chen, Pengfei Wang
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Publication number: 20230024237Abstract: A gradient doped cobalt-free positive electrode material and a preparation method therefor, a lithium-ion battery positive electrode, and a lithium battery. The positive electrode material consists of LiNixMnyAzO2. The content of element A in the positive electrode material decreases in a direction from a surface layer of the positive electrode material to the center, and A is one or more of Al, Zr, Ti, B, and W. The preparation method is easy to implement, simplifies roasting condition requirements, and provides a cobalt-free positive electrode material having good cycle performance.Type: ApplicationFiled: December 17, 2020Publication date: January 26, 2023Applicant: SVolt Energy Technology Co., Ltd.Inventors: Qiqi Qiao, Weijun Jiang, Mingzhu Sun, Xinpei Xu, Zetao Shi, Jiali Ma, Sixian Chen, Pengfei Wang
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Publication number: 20230018612Abstract: Provided are a cobalt-free system, a positive electrode slurry, a slurry homogenization method therefor, and the use thereof. The cobalt-free system comprises a cobalt-free material, a binder, a conductive agent and a pH regulator. The cobalt-free system can reduce the rebound degree of the viscosity of a slurry after leaving to stand to the same degree as that of a ternary 811 single crystal, and can also improve the stability of the coating surface density of the cobalt-free material to the same level as that of a ternary material.Type: ApplicationFiled: October 30, 2020Publication date: January 19, 2023Applicant: SVolt Energy Technology Co., Ltd.Inventors: Xia Su, Hongxin Yang, Xu Gao, Daixing Wang, Bisheng Luo, Rui Ma
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Publication number: 20220131237Abstract: The present invention discloses a battery pack and a vehicle. The battery pack comprises a plurality of battery cells and electrical connection components. the plurality of battery cells are arranged side by side; the electrical connection components are arranged on the ends of the plurality of battery cells, and have electrode receiving sockets and FPC receiving sockets arranged thereon, wherein the electrode receiving sockets are adapted to be electrically connected with a plurality of electrode posts of the plurality of battery cells, and the FPC receiving sockets are adapted to be electrically connected with a plurality of FPC corresponding to the plurality of battery cells.Type: ApplicationFiled: November 20, 2020Publication date: April 28, 2022Applicant: SVOLT Energy Technology Co., LtdInventors: Haiyang Song, Shengjie Cao, Sheng Gao