Abstract: A battery connection structure includes a plurality of battery units connected in series. At least one battery unit is connected in series to other battery units through a temperature switch; the temperature switch includes a first connection member connected to a first electrode terminal of the battery unit and a second connection member connected to a second electrode terminal of the battery unit; at normal operating temperature, the first connection member and the second connection member are disconnected, and the first connection member and the second connection member are respectively connected to the two electrode terminals of the battery unit; when the temperature is higher than the normal operating temperature, the first connection member and/or the second connection member are/is deformed and disconnected from the corresponding electrode terminal(s) of the battery unit, and the first connection member and the second connection member are connected.

Abstract: The disclosure provides preparation methods of a solid-state battery and a battery array, and a solid-state battery. The above preparation method adopts powder sintering 3D printing manufacturing technology, which can increase the interfacial contact among different materials, and improve the contact interface between the electrode and the solid-state electrolyte, thereby obtaining a better ion conduction path. Through printing, annealing and cooling layer by layer, the internal stress, the interlayer effect and the interface effect are eliminated, and defects are reduced, which makes the structure of the prepared positive electrode, negative electrode, solid-state electrolyte and the entire solid-state battery more stable.

Abstract: The disclosure provides an energy storage battery system, including a battery cluster, a first communicating unit and a second communicating unit. The battery cluster includes at least one battery module, and the battery module includes at least one battery cell. The first communicating unit and the second communicating unit are both communicated with the battery cell. The first communicating unit is used to connect with an air extraction device, and the gas in the battery cell and the first communicating unit can be extracted using the air extraction device. The second communicating unit is used to connect with a low-pressure pump, and external cooling fluid can be transmitted to an interior of the battery cell using the low-pressure pump. The disclosure further provides a control method of battery thermal runaway.

Abstract: A solid state electrolyte is provided, which includes a ligand composed of a ceramic powder and a nitrogen containing aromatic copolymer, the ceramic powder is the core and the receptor, the nitrogen containing aromatic copolymer is comprised by a first polymer and a second polymer, the first polymer is aromatic polyamide, the second polymer is selected from the group consisting of P2VP, P4VP, PVA, PEO and PAN. The solid state electrolyte can form good contact interfaces at the anode and cathode electrodes. A lithium-ion battery including the solid state electrolyte is also provided.

Abstract: The disclosure provides an energy storage battery system, including a battery cluster and a first communicating unit. The battery cluster includes at least one battery module, and the battery module includes at least one battery cell. The first communicating unit is used to connect with a high-pressure pump, and external cooling fluid can be pressurized by the high-pressure pump and transmitted to the first communicating unit to cause the first communicating unit to burst, and after the first communicating unit bursts, the cooling fluid is sprayed to the battery cell. The disclosure further provides a control method of battery thermal runaway.

Abstract: A battery cell is provided. The battery cell is provided with circulation elements for circulating between inside and outside of the battery cell, and the circulation elements are connected with the battery cell. Substances inside the battery cell are capable of being discharged out of the battery cell through the circulation elements, and substances outside the battery cell also capable of entering the interior of the battery cell through the circulation elements. The battery cell is carried with its own circulation elements, the battery cell is not injected with electrolyte during production, transportation and assembly, and the electrolyte is injected into the battery cell after the installation of the battery cluster. Therefore, the battery cluster is not charged during transportation and installation of the battery cluster, to eliminate the safety risk of the battery cluster during transportation and installation. A battery unit and a battery cluster are also provided.

Abstract: A negative electrode material includes a dopant containing a first dopant and a second dopant, the first dopant contains a boron element, and the second dopant contains at least one selected from a group consisting of a nitrogen element, an oxygen element, a fluorine element, a phosphorus element, and a sulfur element. Two or more types of dopants are added in the particle producing process, so that the negative electrode material prepared has excellent high and low temperature cycle performance and rate performance. Furthermore, a carbonization coating process is omitted which is compatible with the preparation process of the conventional graphite negative electrode, thus the preparation process is simpler, the equipment required is less, and the cost is lower. A preparation method thereof is provided as well.

Abstract: Disclosed are an electric vehicle thermal management system, a battery thermal management method and an electric vehicle. The electric vehicle thermal management system comprises a first loop, a second loop, a first temperature control mechanism, a second temperature control mechanism, a conveying mechanism and a release mechanism, wherein the first loop transmits a first heat conducting agent; a battery and the first temperature control mechanism are respectively connected to the first loop; the second loop transmits a second heat conducting agent; the second temperature control mechanism and a driving motor are respectively connected to the second loop; the conveying mechanism is respectively connected to the first loop and the second loop; and the release mechanism is connected to the first loop, such that a battery fire disaster is effectively prevented from occurring, and the safety of the vehicle is improved.

Abstract: The present application provides a coated anode material and a method of preparing the same. The coated anode material has a core-shell structure, wherein the core-shell structure includes an inert core and a shell coated on the inert core, the shell comprises an anode active material, and the inert core comprises a non-active material. In the coated anode material, the anode active material of the shell is distributed over the non-active material of the inert core, and the coated anode material can overcome the volume change problem of silicon particles during lithium insertion/deinsertion to a certain extent and obtain a better cycle performance and rate performance.

Abstract: The present disclosure provides a method for measuring an internal resistance of a battery, after discharging/charging the battery under a preset constant-current, acquiring voltages of the battery within a period from ending the discharging/charging to a time when the voltage reaches stable, and then calculating different corresponding internal resistances caused by ohmic polarization, electrochemical polarization and concentration polarization separately. Since it is different for the orders of the magnitude of the characteristic time which these different polarizations need to get back into new equilibrium state after ending the discharging/charging, the method of the present disclosure classifies the internal resistances caused by these polarizations and calculated different internal resistances corresponding to the polarizations.

Abstract: Provided is a method for recycling and refreshing a cathode material, a refreshed cathode material and a lithium ion battery. The method for recycling and refreshing the cathode material includes: 1) a cathode material recycled from a waste battery is mixed with a manganiferous salt solution; 2) an alkali aqueous solution is added to the mixture to react to obtain a manganese hydroxide coating cathode material; and 3) the manganese hydroxide coating cathode material is sintered with a lithium resource to obtain a refreshed cathode material. The refreshed cathode material has no obvious impurity phase and has good crystallinity, high initial charge-discharge efficiency and good cycling performance.

Abstract: An analytical method for precipitated particles using a co-precipitation reaction in includes feeding streams and a tracking metal into a reaction vessel; collecting a precipitated product containing the tracking metal from the reaction vessel in increments of time to obtain product samples; filtering each collected product sample to separate precipitated particles from filtrate; and performing elemental analysis for the tracking metal in the precipitated particles of each collected product sample and measuring a concentration of the tracking metal in the precipitated particles, to obtain a residence time distribution of the precipitated particles in the reaction vessel according to the concentration of the tracking metal in the precipitated particles. Therefore the preferred residence time of the precipitated particles in the reaction vessel can be ascertained, so that it is clear when the precipitated particles should be collected from the reaction vessel.

Abstract: A method for preparing an inorganic solid electrolyte composite slurry includes: mixing an inorganic solid electrolyte powder with a first solvent and wet grinding an obtained mixture to form a preparatory slurry A; mixing a binder with a second solvent to form a preparatory slurry B; mixing the preparatory slurry A with the preparatory slurry B to obtain the inorganic solid electrolyte composite slurry. The inorganic solid electrolyte composite slurry prepared by the present disclosure effectively solves the problem that it is difficult to reduce the inorganic solid electrolyte powder particle size in the preparation process, or it is difficult to fully dry the inorganic solid electrolyte powder after sand milling. The present disclosure further provides an inorganic solid electrolyte composite slurry prepared by the method, an application of the inorganic solid electrolyte composite slurry, and a lithium-ion battery having the inorganic solid electrolyte composite slurry.

Abstract: The disclosure provides a battery module. The battery module includes a battery stacked body, which includes stacked batteries; cooling plates that are installed at the tail ends in a battery stacking direction of the battery stacked body, and the cooling plates and the battery stacked body are installed in a thermal insulation mode; and heat transfer device that are in thermal contact with the cooling plates, and heat of the batteries is transferred to the cooling plates through the heat transfer device; wherein in a normal charging-discharging state, the battery with the highest temperature in the battery stacked body is a battery A; and between a single cooling plate and the battery A, a thermal resistance between each battery and the heat transfer device is reduced along with the increase of a distance between the each battery and the cooling plate in the battery stacking direction.

Abstract: An anode, which includes a current collector and an anode material stack coated on the current collector, the anode material stack includes an anode active material layer, which includes porous carbon material and a first binder, and the porous carbon material is mixed with the binder. The anode material stack further includes a carbon intermediate layer sandwiched between the current collector and the anode active material layer. It also provides a method for preparing the anode. Further, it provides a lithium ion battery including the anode above.

Abstract: A method for producing cathode particles is provided. The method includes: providing a plurality of precipitation zones from i=1 to N, wherein the precipitation zones are connected in series, each precipitation zone comprises a feed stream (ai) providing the precipitation cations, a feed stream (bi) providing the precipitation anions, a continuous outflow (ci) of precipitation particle slurry to the next precipitation zone, and a continuous inflow (ci?1) of precipitation particle slurry from the prior precipitation zone, and forming, in the precipitation zones, precipitated particles, and finally to form, in the precipitation zone N, precursor particles comprised of N layers, wherein layer i of each particle is precipitated and formed in the precipitation zone i, wherein N is not less than 3, and when i=1, there is no inflow (ci?1).

Abstract: The present invention provides a method of supplementing lithium for an anode used for lithium secondary battery. Particularly, the present invention relates to lithium-supplementing slurry and a method for preparing the same, as well as an anode prepared with the slurry and a lithium secondary battery including the same. In the present invention, the prepolymer is used as a binder for supplementing lithium, the process for preparing the prepolymer is easy to operate and has low cost; the lithium-supplementing method using said prepolymer is easy to operate and has low cost, and it is easy to control the amount of lithium supplemented.

Abstract: The present disclosure provides an anode, which includes a current collector and a carbon fiber layer that is coated onto the current collector and includes oxygen-containing functional groups. The present disclosure also provides a method for preparing the anode, especially preparing the carbon fiber layer. In addition, the present disclosure provides a lithium ion secondary battery including the anode above.

Abstract: The present invention provides a method for preparing an anode slurry used in a lithium ion battery. The method includes the following steps: providing at least one anode active material, at least one conductive agent, at least one monomer or a prepolymer and at least one solvent. Mixing the anode active material, the conductive agent and the monomer or the prepolymer with the solvent; dispersing uniformly to form a mixture. Adding an initiator into the mixture; polymerizing the monomer or the prepolymer at a certain temperature; and yielding the anode slurry. Besides, the present invention also provides an anode slurry prepared by the above method, and an anode plate prepared by the anode slurry, and a lithium ion battery including the anode plate.

Abstract: The present application provides a coated anode material and a method of preparing the same. The coated anode material has a core-shell structure, wherein the core-shell structure includes an inert core and a shell coated on the inert core, the shell comprises an anode active material, and the inert core comprises a non-active material. In the coated anode material, the anode active material of the shell is distributed over the non-active material of the inert core, and the coated anode material can overcome the volume change problem of silicon particles during lithium insertion/deinsertion to a certain extent and obtain a better cycle performance and rate performance.