Abstract: Provided are an SOP management method and apparatus for a power battery pack, and an electric vehicle. The SOP management method includes: obtaining a SOP value of each parallel battery branch in a power battery pack; and obtaining a current total SOP value of the power battery pack according to the SOP value of each parallel battery branch. In the present application, in a multi-branch-parallel power battery pack, an SOP value of each parallel branch is first subjected to refined estimation according to an operation condition of each parallel branch, and then the total SOP of the power battery pack is estimated from the whole system level, and the problem of statistical distortion of the total SOP of the power battery pack is solved, thereby effectively improving the safety and stability of use of the battery.

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 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 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, 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: Provided is a battery housing. The battery housing has an opening at both ends in a length direction, respectively, and the battery housing is provided with at least one cooling unit extending along the length direction. The cooling unit is provided with a coolant channel for coolant circulation, and the at least one cooling unit divides the internal space of the battery housing into at least two accommodating cavities spaced apart from top to bottom in a height direction. Each accommodating cavity is used for accommodating a battery cell. By providing the cooling unit in the battery housing, the heat generated by the battery cell can be dispelled immediately, thereby quickly and effectively solving the heat dissipation problem of the battery cell during charging and discharging. Also provided are a lithium-ion secondary battery and an electric vehicle.

Abstract: Provided is a lithium-ion secondary battery, comprising a housing and at least two cells packaged in the housing. The housing is provided with at least one cooling unit extending along a length direction of the housing. The cooling unit is provided with a coolant channel for coolant circulation, the cooling unit divides the internal space of the housing into at least two accommodating cavities spaced apart in a thickness direction of the housing. A battery cell is arranged in each accommodating cavity, and the cooling units are in thermal conduction contact with the cells in adjacent accommodating cavities. By providing the cooling unit in the housing, the heat generated by the battery cell can be conducted in time, thereby quickly and effectively solving the heat dissipation problem of the battery cell during charging and discharging. Also provided is an electric vehicle.

Abstract: A battery cover plate and a lithium-ion secondary battery. An electrode terminal is provided on the battery cover plate, an explosion-proof groove is also provided on the battery cover plate, and the explosion-proof groove surrounds or is set partially around the electrode terminal. The battery cover plate can burst or explode along the explosion-proof groove in the case of battery abnormality, and the battery cover plate can drive the electrode terminal to move together when the battery cover plate bursts or explodes, and the movement of the electrode terminal pulls a tab, so that the tab or the junction of the tab can be partially broken or completely broken, thereby weakening or cutting off the electric connection between the electrode terminal and a battery cell.

Abstract: Provided is a battery assembly, which includes a cover plate and a pole. The pole penetrates the cover plate and is fixed with the cover plate by riveting. For the battery assembly provided by the application, the pole and the cover plate are fixed by riveting. Compared with the fixing method of welding, it not only simplifies the fixing operation, improves the production efficiency, but also reduces the production cost. Also provided are a preparation method of a battery assembly, a battery and an electric vehicle.

Abstract: The invention relates to a method for preparing core-shell structured particle precursor under a co-precipitation reaction. In this method, by controlling the feeding of different types of anion compositions and/or cation compositions, and adjusting the pH to match with the species, precipitated particles are deposited to form a precipitated particle slurry, filtering, and drying the precipitated particle slurry to yield the particle precursor. The invention also provides a particle precursor which includes a core-shell structure. The shell is made of gradient anions and/or cations. Such particle precursor can be used to prepare cathode of lithium-ion battery.

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: A winding type battery cell includes a roll core and at least one electrode sheet unit. The roll core includes a positive connection part, a negative connection part and an insulation part located between the positive connection part and the negative connection part. The positive connection part and the negative connection part are respectively connected with two ends of the insulation part. The electrode sheet unit includes a positive electrode sheet, a negative electrode sheet and a separator. The positive electrode sheet and the negative electrode sheet are separated by the separator. The positive electrode sheet is connected with the positive connection part, and the negative electrode sheet is connected with the negative connection part. The winding type battery cell is formed by winding the electrode sheet unit around the roll core. A winding battery with the winding type battery cell is also provided.

Abstract: Provided are a battery pack and an electric vehicle. The battery pack includes a case, a cooling plate assembly and an energy storage unit. The cooling plate assembly and the energy storage unit are arranged inside the case, and the cooling plate assembly at least includes a first cooling plate. The first cooling plate is fixed on the case, and the first cooling plate divides the case, in a Z-direction, into a first accommodating space which is located above the first cooling plate, and a second accommodating space which is located below the first cooling plate. The energy storage unit at least includes a first energy storage unit which is arranged inside the first accommodating space and fixed on the first cooling plate, and a second energy storage unit which is arranged inside the second accommodating space.

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: A management method for a battery system having parallel battery packs includes a charging control operation of sequentially closing battery packs having a low voltage value level and completing a charging of the battery packs. The purpose of the present invention is to provide a management method for a battery system having parallel battery packs which is applicable to multiple parallel battery packs being charged in parallel, to solve the technical problems that a safe and stable operation of the entire battery packs cannot be ensured caused by the failure of the battery packs, and excessive current impact may be generated due to an excessive voltage difference among the battery packs.

Abstract: A cathode active material and a Lithium-ion electrochemical system thereof are provided. The lithium-ion cathode material is described by xLiMO2*(1?x)(LiaM?1?a)Oy, M and M? independently comprises one or more metal ions that together have a combined average oxidation state between 3+ or 2+, 1>x?0.5, 0.75?a>0, 1?y?0.625.

Abstract: The invention relates to a method for preparing cathode particles under a co-precipitation reaction by feeding NaOH and metal sulfate solution into different vessels. The invention further provides a cathode active material having the cathode particles. By the method of the invention, the number density distribution of prepared particles is much smaller than feeding NaOH and metal sulfate together into same vessel.

Abstract: The present invention provides a method for preparing an aromatic polyamide porous membrane and an aromatic polyamide porous membrane prepared by the above method. The method for preparing an aromatic polyamide porous membrane includes the following steps: mixing an ionic liquid with an aromatic polyamide into a solvent to form a mixed solution; the mixed solution forming a membrane in a coagulation bath; and extracting with an extractant to remove the solvent and the ionic liquid from the membrane to yield a porous membrane. In the method of the present invention, the application of the ionic liquid would greatly reduce the application of additives; further, the ionic liquid has a high stability and is easy to be separated from other solvents and be recycled, which assures the safety during the usage and recycle thereof.

Abstract: The present disclosure provides a liquid membrane conveying apparatus for preparing a porous membrane includes a transmission unit and a carrier unit. The carrier unit conveys a liquid membrane into a gelling solution by the entrainment of the transmission unit. The carrier unit includes a first carrier and a second carrier. The first carrier and the second carrier respectively contact with opposite edges of the liquid membrane along a conveying direction of the liquid membrane. The consistency of the pores on the two surfaces of the porous membrane is improved by using the liquid membrane conveying apparatus.