Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology (hong Kong) Limited

Ningde Amperex Technology Limited

Contemporary Amperex Technology Limited

Chengyong Liu

Yongsheng Guo

Chengdu Liang

Bobing Hu

Jiawei Fu

Qian Li

Quan Fan

Shengyuan Huang

Zhimin Dan

Wei Zhang

Xinwei Chen

Meng Cheng

Xian Huang

Yizhen Hou

Yu Yan

Chuying Ouyang

Tao Zhang

Ang Fu

Rupeng Zhang

Hansen Wang

Wenwen Xue

Xiaoning He

Jieliang Zou

Bingbin Wu

Shangju Liao

Ziqi Yi

Pan Wan

Jun Yang

Li An

Zhangdi Xie

Lihong Li

This application discloses a nonaqueous electrolyte solution, a secondary battery containing the nonaqueous electrolyte solution, and an electrical device. The nonaqueous electrolyte solution includes: a compound A including a saturated five-membered ring or six-membered ring and at least one fluorine-containing substituent, where the ring contains 1 or 2 oxygen atoms as ring atoms, and a ring carbon atom connected to the oxygen atom in the ring is not directly replaced by fluorine; and a compound B including a saturated five-membered ring or six-membered ring that contains 1 or 2 oxygen atoms as ring atoms, where at least one ring carbon atom connected to the oxygen atom in the ring is directly replaced by at least one fluorine atom.

Nonaqueous electrolyte solution, secondary battery containing same, and electrical device

A heating method traction battery. The traction battery is connected to a switch circuit of a motor and configured to supply power to the motor via the switch circuit. The switch circuit includes multiple legs and the multiple legs are connected to the traction battery in parallel. The method includes: receiving a heating signal sent by a battery management system of the traction battery; and controlling, according to the heating signal, at least one of the multiple legs to form a short-circuit loop of the traction battery, the short-circuit loop being configured to discharge the traction battery and heat the traction battery during the discharging process.

Heating method and heating system of traction battery

Embodiments of the present application provide a lithium metal negative electrode, a preparation method therefor and related lithium metal battery and device. The lithium metal negative electrode may comprise: a negative electrode current collector; at least one lithium-based metal layer provided on at least one surface of the negative electrode current collector; and an ion-conducting polymer modification layer, which is located on the surface of one of the at least one lithium-based metal layer and comprises at least catalytic amount of a Lewis acid, the Lewis acid containing cations of a metal capable of forming an alloy-type active material with lithium.

Lithium metal negative electrode, preparation method therefor, and related lithium metal battery and device

A composite electrolyte, including a sulfide electrolyte, a polymer electrolyte, and a functional additive material are provided. In some embodiments, the functional additive material is selected from polymers represented by the following structural R—O—R-A. In some embodiments, Ris selected from at least one of polyvinyl group, polypropylene group, polyacrylate group, polyvinylcarbonate group, polyacrylonitrile group, and polystyrene group; Ris a straight-chain or branched alkyl group with 3-10 carbon atoms; A is selected from at least one aromatic hydrocarbon group of benzene group, biphenyl group, triphenyl group, naphthalene group, anthracene group, phenanthrene group, and pyrene group; and X is selected from at least one of hydrogen atom, halogen atom, mercapto group, hydroxyl group, amine group, and aldehyde group.

Composite electrolyte and solid-state battery containing same

An electrolyte for a lithium-ion battery, a lithium-ion battery, a battery module, a battery pack, and an apparatus are provided. The electrolyte includes an organic solvent, an electrolyte lithium salt dissolved in the organic solvent, and an additive, where the additive is a compound represented by following formula I. The electrolyte can inhibit generation of lithium dendrites in the lithium-ion battery, improve cycle performance of the battery, and also improve flame retardancy of the battery, thereby effectively resolving defects in the existing technology.

Electrolyte for lithium-ion battery, lithium-ion battery, battery module, battery pack, and apparatus

Disclosed are a lithium metal composite electrode material for a lithium metal battery, a preparation method for the same, and an electrode, battery, battery module, battery pack and apparatus comprising the same. The lithium metal composite electrode material comprises: lithium metal particles and a lithium-containing conductive layer serving as a supporting framework, the supporting framework being filled with the lithium metal particles; wherein the lithium-containing conductive layer comprises an inorganic lithium compound and a lithium alloy. The lithium metal composite electrode material can solve the problems that, when lithium metal is used as a negative electrode, the electrolyte is easily consumed, and lithium dendrites are easily produced, deposited and dissolved to change electrode thickness, which in turn affects the cycle stability, electrical performance and structural stability of the battery, so as to achieve the purpose of improving the structural stability and cycle stability of the lithium metal electrode.

Metal lithium metal, supporting framework, and inorganic lithium compound, method for preparing the same, and electrode, battery, battery module, battery pack and apparatus comprising the same

This application provides an electrolytic solution and a lithium metal battery containing the electrolytic solution. The electrolytic solution includes a lithium salt, an organic solvent, and an additive. The additive includes a sultam compound represented by Structural Formula I. R is selected from substituted or unsubstituted Cto Chydrocarbyls, where a substituent is selected from a phenyl, Cto Calkyls, or Cto Calkenyls. X is a sulfur atom or a phosphorus atom. Rand Reach are independently selected from an oxygen atom, a fluorine atom, a chlorine atom, a bromine atom, and substituted or unsubstituted C1 to C10 hydrocarbyls. Both Rand Rare not oxygen atoms concurrently.

Electrolytic solution and lithium metal battery containing the same, battery module, battery pack, and device

A heating system includes first and second input ends, first and second battery modules, first switch and second switches, and a control unit. The first switch is connected between first terminals of the first and second battery modules. Second terminals of the first and second battery modules are connected to each other. The second switch is connected between the first input end and the first terminal of the second battery module. The second input end is connected to the first terminal of the first battery module. The first terminals of the first and second battery modules have a same polarity, and the second terminals of the first and second battery modules have a same polarity. The control unit is connected to the first and second switches, and configured to control the first and second switches to be turned on or off.

Heating system, heating method and apparatus, and electric device

This application provides a polymer current collector, a preparation method thereof, and a secondary battery, battery module, battery pack, and apparatus associated therewith. The polymer current collector provided in this application includes polymer film layers, where the polymer film layers include a first polymer film layer and a second polymer film layer, a resistivity of the first polymer film layer is denoted as &#x3c1;1, a resistivity of the second polymer film layer is denoted as &#x3c1;2, and the current collector satisfies &#x3c1;1&#x3e;&#x3c1;2. The polymer current collector in this application can induce to deposit of lithium metal from a low conductivity side to a high conductivity side, avoiding risks of depositing lithium ions on the surface of the current collector and thereby increasing cycle life of lithium metal batteries.

Polymer current collector, preparation method thereof, and secondary battery, battery module, battery pack, and apparatus associated therewith

This application provides a negative electrode plate, a lithium metal battery, and an apparatus including the lithium metal battery. The negative electrode plate includes a negative electrode current collector and a lithium-metal negative electrode disposed on at least one surface of the negative electrode current collector, where a polymer protective film is disposed on a surface of the lithium-metal negative electrode away from the negative electrode current collector, the polymer protective film includes a citric acid copolymer, and a number-average molecular weight Mn of the citric acid copolymer is 10,000 to 1,000,000. In this application, a polymer protective film with high tensile strength, high puncture strength, high elongation, and high electrolyte holding capacity may be formed on the surface of the lithium-metal negative electrode in the negative electrode plate.

Negative electrode plate, lithium metal battery, and apparatus including the lithium metal battery

The present application discloses a sulfide solid electrolyte and a method for the preparation thereof, an all solid state lithium secondary battery, and an apparatus containing the all solid state lithium secondary battery. The sulfide solid electrolyte is obtained by compounding at least LiS, PSand a dopant MSO, wherein M is one or more selected from Na, K, Ba and Ca, and 1&#x2264;x&#x2264;2.

Sulfide solid electrolyte and method for the preparation thereof, all-solid-state lithium secondary battery, and apparatus containing the same

The present application provides a preparation method for a solid electrolyte, including: acquiring an initial reaction mixture including a lithium precursor, a central atom ligand and an organic solvent; acquiring a modified solution including a borate ester and the organic solvent; mixing the initial reaction mixture and the modified solution, and drying to acquire an initial product; performing a grinding, cold press and heat treatment to the initial product to obtain the solid electrolyte. In the preparation method provided by the present application, a B and O co-doped sulphide solid electrolyte can be obtained by modifying the sulphide solid electrolyte with the borate ester as a doping raw material. The ionic conductivity of the prepared sulphide solid electrolyte is significantly improved, which is also conducive to improvement of energy density of the all-solid-state batteries.

Solid electrolyte sheet and preparation method thereof, battery and device including the same

The present disclosure provides a polymer protecting layer, a lithium metal negative electrode, a lithium secondary battery. In the lithium secondary battery of the present disclosure, a polymer protecting layer comprising a polymer ionic liquid is coated on a surface of a lithium metal sheet.

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Ningde, China

Chengyong Liu