Abstract: The present application provides a positive electrode sheet, a battery, an energy storage device, an electrical system and an energy storage system. The present application provides a positive electrode sheet, including: a positive current collector; and a positive active layer. The positive active layer is disposed on a side of the positive current collector. The positive active layer includes a positive active material, a binder and a conductive agent. In the positive active layer, an average mass fraction of the positive active material is x, an average mass fraction of the binder is y, and an average mass fraction of the conductive agent is z. The positive active layer satisfies a relationship: 24.5?x/(y+z)?34.5. The positive active layer of the positive electrode sheet of the present application has a good adhesion on the positive current collector and is not easy to lose powder or material.

Abstract: A lithium ion cell includes a positive electrode, a negative electrode, an electrolyte, and a separator. The separator is arranged between the positive electrode and the negative electrode. The positive electrode, the negative electrode, and the separator cooperatively form an electrode assembly, and at least part of the electrode assembly is infiltrated by the electrolyte. The electrolyte includes a lithium salt and solvents. The solvents include a linear solvent and a cyclic solvent, the positive electrode includes a positive current collector and a positive active material layer, and the negative electrode includes a negative current collector and a negative active material layer. The lithium ion cell satisfies: 0.46?(10×D/(CWA+CWC)×Wb/Wa?3.8. CWC ranges from 0.13 mg/mm2 to 0.26 mg/mm2, and CWA ranges from 0.065 mg/mm2 to 0.13 mg/mm2.

Abstract: Provided are a liquid cooling plate and a battery module. The liquid cooling plate has a first liquid cooling portion and a second liquid cooling portion that are perpendicular to each other. The first liquid cooling portion is located at a middle position of the second liquid cooling portion in a first direction. The liquid cooling plate includes: a first plate body having a one-piece structure and including the first liquid cooling portion and a cover body portion of the second liquid cooling portion, the first plate body having a first flow channel of the first liquid cooling portion; and a second plate body having a one-piece structure and fixedly connected to the cover body portion, a second flow channel of the second liquid cooling portion being defined between the second plate body and the cover body portion. The first flow channel is in communication with the second flow channel.

Abstract: The present disclosure provides fire-protection detecting method and device, applied to a container-type energy storage system. The method includes: obtaining first sampling data, second sampling data, and third sampling data; determining a first sampling temperature based on the first sampling data, and determining whether a risk event has occurred in the container-type energy storage system based on the first sampling temperature; if it is determined that the risk event has occurred, determining whether the target lithium battery cluster has caught fire based on the second sampling data and/or the third sampling data; if it is determined that the target lithium battery cluster has caught fire, calling the fire-protection system to extinguish fire and sending a first prompt message to the terminal device to prompt that the target lithium battery cluster has caught fire; determining whether to shut down the fire-protection system based on the updated first sampling data.

Abstract: A negative active material includes a porous structure having micropores, mesopores, and macropores, where a pore volume of the negative active material satisfies: 0.5%?V1/V2?2% and 30%?V2/(V2+V3)?50%, where V1 represents a pore volume of the micropores in the negative active material, V2 represents a pore volume of the mesopores in the negative active material, and V3 represents a pore volume of the macropores in the negative active material.

Abstract: A harness isolation plate and a battery module are provided. The harness isolation plate has a length direction X and a width direction Y. The harness isolation plate includes multiple isolation sub-plates arranged in sequence along the length direction. The harness isolation plate includes a first isolation sub-plate, at least one second isolation sub-plate, and a third isolation sub-plate arranged in sequence along the length direction. Along a height direction of the harness isolation plate, a projection of the first isolation sub-plate and a projection of the third isolation sub-plate are both L-shaped, and a projection shape of the second isolation sub-plate is Z-shaped. In the battery module, multiple separate isolation sub-plates form the harness isolation plate.

Abstract: The present disclosure relates to an energy storage cabin. The energy storage cabin includes a cabin body and a cabin door. The cabin body has an opening and a first accommodation space. The cabin door is disposed at the opening of the cabin body in an openable and closable manner. The cabin door includes an inner door panel, an outer door panel, and a connecting member. The inner door panel is located at an inner side of the outer door panel in a stacking manner. A thermal insulation layer is provided between the inner door panel and the outer door panel. The connecting member penetrates the inner door panel to connect the inner door panel with the outer door panel. A heat insulation pad is sandwiched between the inner door panel and the outer door panel at a position where the connecting member penetrates the inner door panel.

Abstract: A negative electrode sheet, a battery, and an electricity-consumption device are disclosed. The negative electrode sheet includes a current collector and a negative active material layer. When a state of charge of a battery is 100% or a voltage of the battery is 3.65 V, a differential scanning calorimeter curve of the negative active material layer includes: a first exothermic peak from 120° C. to 150° C., in which the negative active material layer has heat release A1 satisfying 2J/gSA1?50 J/g; a second exothermic peak from 220° C. to 260° C., in which the negative active material layer has heat release A2 satisfying 20J/g?A2?100 J/g; and a third exothermic peak from 260° C. to 310° C., in which the negative active material layer has heat release A3 satisfying 200J/g?A3?600J/g.

Abstract: A negative electrode sheet, a secondary battery, and an electricity-consumption device are provided. The negative electrode sheet includes a negative active material layer. Heat release Q of the negative active material layer immersed in electrolyte satisfies 220 J/g?Q?600 J/g.

Abstract: A fire-protection system and a method for a container-type energy storage device and a storage medium are provided. The system includes at least one detector module, a data prediction apparatus and a fire-protection host of the container-type energy storage device, and the data prediction apparatus is communicatively connected to the at least one detector module and the fire-protection host of the container-type energy storage device, respectively. The current detection data of the detector can be predicted by using the historical detection data in the event of an abnormal communication link between the detector module and the fire-protection host of the container-type energy storage device. The detection data can be sent to the fire-protection host to ensure that data can be continuously provided to the fire-protection host.

Abstract: The present disclosure provides an electrolyte and an energy storage device. The electrolyte includes, by mass of electrolyte, a fluorinated solvent with a mass percentage a, a cyclic carbonate with a mass percentage b, and a lithium hexafluorophosphate with a mass percentage c, wherein 1%?a?30%, 25%?b?45%, and 7%?c?10%.

Abstract: An energy-storage device, an electrical apparatus, and a winding method are provided in the disclosure. The energy-storage device includes an electrode and a separator, where the electrode and the separator are stacked and wound to form a cell. The electrode is connected with a tab at an end of the electrode in a width direction of the electrode, where the tab includes a first tab and at least one second tab. The first tab is positioned adjacent to an end of the electrode in a length direction of the electrode, and the first tab defines a U-shaped notch. The U-shaped notch is configured to indicate a winding end position of the electrode, facilitating identification and winding automation.

Abstract: This disclosure provides an energy storage device, a welding method for an energy storage device, and an electricity-consumption device. The energy storage device includes an end cap, a housing, and a current collector arranged between the end cap and the housing. The current collector includes a main body and a welding portion, and the main body and the welding portion are integrally formed. The main body has a first surface and a second surface facing away from the first surface. The end cap is connected to the first surface of the main body, the housing is connected to the second surface of the main body, and the welding portion is connected to an outer peripheral side surface of the end cap, an outer peripheral side surface of the housing, and an outer peripheral side surface of the main body.

Abstract: A negative electrode sheet and a screening method thereof, a battery and an electric equipment are provided. The negative electrode sheet comprises a current collector and a negative active material layer arranged on the current collector. The negative active material layer has negative active particles, and each negative active particle satisfy the relation: 0.7?R50/Dv50?0.95; R50 is an equivalent average spherical diameter of the negative active particles, and Dv50 is a corresponding particle diameter when a cumulative volume fraction in a volume-based distribution reaches 50% in the particle diameter distribution measurement by a laser scattering method.

Abstract: A heat-dissipating member, an energy-storage apparatus, and an electricity-consumption device are disclosed. The heat-dissipating member includes a first heat-dissipating portion and at least one second heat-dissipating portion. The first heat-dissipating portion is connected to each of the at least one second heat-dissipating portion to form a transition section. A liquid inlet channel and a liquid outlet channel of the heat-dissipating member both are positioned inside the first heat-dissipating portion and the at least one second heat-dissipating portion and pass through the transition section. Two harmonica-shaped tubes are disposed inside the transition section. Each of the two harmonica-shaped tubes defines a flow channel cavity. One flow channel cavity is in communication with the liquid inlet channel, and the other one flow channel cavity is in communication with the liquid outlet channel.

Abstract: An energy-storage device is provided in the disclosure. The energy-storage device includes an electrode assembly and a housing assembly. The housing assembly includes a housing and an electrolyte pipeline. The electrolyte pipeline and the electrode assembly are both mounted inside the housing. The electrolyte pipeline is located between the electrode assembly and the housing and includes an electrolyte inlet pipe and an electrolyte outlet pipe. The electrolyte inlet pipe is located at one side of the electrode assembly and in communication with an interior of the housing. The electrolyte outlet pipe is fixedly mounted to and in communication with the electrolyte inlet pipe. The electrolyte outlet pipe defines multiple electrolyte outlet holes that are arranged at intervals in sequence.

Abstract: An energy-storage apparatus, an energy-storage module, and an electricity-consumption device are disclosed. The energy-storage apparatus includes an end cover assembly, an electrode assembly, a partition member, a protection member, and a housing. The partition member defines a through-recess and a through-hole, and the through-recess and the through-hole penetrate through the partition member in a thickness direction of the partition member. The protection member defines a first accommodating cavity, the electrode assembly passes through the through-recess, and the electrode assembly is in sealing connection to a recess wall of the through-recess. The partition member is in sealing connection to a cavity wall of the first accommodating cavity, and separates the first accommodating cavity into a first accommodating sub-cavity and a second accommodating sub-cavity. The first accommodating sub-cavity is in communication with the second accommodating sub-cavity through the through-hole.

Abstract: A method for cell winding and a system for cell winding are provided. The method includes feeding materials, preparing winding, embossing, and winding. The feeding materials is carried out to obtain a separator, a cathode electrode, and an anode electrode, where the cathode electrode satisfies that: after pre-winding, a first cathode tab of the cathode electrode and a second cathode tab of the cathode electrode are arranged with a surplus misalignment. A starting end of the separator, a starting end of the cathode electrode, and a starting end of the anode electrode are fixed to a winding device. The cathode electrode is embossed by a rolling device, such that the first cathode tab is aligned with the second cathode tab after winding. The embossing is configured to enable the surplus misalignment between the first cathode tab and the second cathode tab after the winding to be zero.

Abstract: The present disclosure provides fire-protection detecting method and device, applied to a container-type energy storage system. The method includes: obtaining first sampling data, second sampling data, and third sampling data; determining a first sampling temperature based on the first sampling data, and determining whether a risk event has occurred in the container-type energy storage system based on the first sampling temperature; if it is determined that the risk event has occurred, determining whether the target lithium battery cluster has caught fire based on the second sampling data and/or the third sampling data; if it is determined that the target lithium battery cluster has caught fire, calling the fire-protection system to extinguish fire and sending a first prompt message to the terminal device to prompt that the target lithium battery cluster has caught fire; determining whether to shut down the fire-protection system based on the updated first sampling data.

Abstract: The present disclosure discloses a protective film assembly, applied to an electrode assembly of an energy storage device, and including an insulation sheet for wrapping the electrode assembly and arranged between a housing of the energy storage device and the electrode assembly. The first side surface covering region includes a first covering sub-region and a second covering sub-region which can overlap each other; the second side surface covering region includes a third covering sub-region and a fourth covering sub-region which can overlap each other; the maximum sizes of the first covering sub-region and the second covering sub-region in a thickness direction and height direction of the electrode assembly are equal, so that the first covering sub-region and the second covering sub-region have a high matching degree and a large bonding area. The present disclosure further discloses an energy storage device.