9results about How to "Prevent self-discharge" patented technology

The invention belongs to the technical field of membrane-free batteries, and particularly relates to a membrane-free dual-phase battery electrolyte and a membrane-free dual-phase battery. According to the membrane-free dual-phase battery, a low-temperature stable organic solvent and water are used as solvents of a two-phase electrolyte, and zinc ion salt is used as a negative electrode electrolyte; a certain proportion of anti-freezing material is added, and an alkane additive is complexed with an organic solvent of a halogen monomer to serve as a positive electrode electrolyte. The problems of high cost and short service life caused by the use of an ion exchange membrane in a liquid battery are avoided, the battery electrolyte is still in a liquid state at low temperature, the temperature working condition of a liquid energy storage battery system is greatly widened, the use of an external heat source under the working condition in winter and the condition that zinc is seriously corroded at normal temperature are avoided, and the service life of the battery is prolonged. The cost of the energy storage system is further reduced.

The invention relates to the technical field of membrane-free batteries, in particular to a membrane-free two-phase vanadium-bromine battery and an electrolyte thereof.In the membrane-free two-phase vanadium-bromine battery, water and an organic solvent are used on the premise that a diaphragm is avoided, battery self-discharge caused by cross contamination of active substances is avoided, bromide ions in potassium bromide serve as cross-phase oxidation-reduction substances, and the service life of the membrane-free two-phase vanadium-bromine battery is prolonged. Vanadium ions in vanadyl sulfate serve as non-cross-phase redox substances, a bromine complexing agent is added into an organic solvent to be combined with bromine to generate a high-solubility hydrophobic active substance, the battery cost is reduced, the device design is simplified, the theoretical capacity of the battery is improved, and a series of battery cycle and service life problems caused by irregular growth of zinc metal are avoided.

The application relates to a diaphragm and an electrochemical device and an electronic device comprising the same, and belongs to the technical field of electrochemical energy storage. The diaphragm comprises a porous substrate and a porous coating on at least one side surface of the porous substrate, and the porous coating comprises fibrous fillers; the fibrous fillers comprise a core layer and a shell layer on the surface of the core layer, the core layer comprises at least one of Mxene and an oxide thereof, MOFs and an oxide thereof, black phosphorus and an oxide thereof, and carbon; the shell layer comprises at least one of silicon dioxide and a lithiumophilic metal oxide; the mass ratio of the shell layer to the core layer of the fibrous fillers is M; the thermal conductivity of the diaphragm is lambda W / (m.K), the specific heat capacity is Cp J / (g.K), and the density is rho g / cm 3 ; the following relationships are satisfied: 0.010 <= (M*lambda) / (2Cp) <= 0.017 and 0.4 <= lambda / (rho*Cp) <= 1.0. The diaphragm can improve the safety performance, cycle life and rate performance of a battery.

This invention relates to a supercapacitor management circuit. The input terminal is connected to port J1 of a charging device and ground port J2. The circuit includes a charging management circuit, a discharging management circuit, and a capacitor protection circuit. The charging management circuit and the discharging management circuit are respectively connected to port J1. The output terminal of the charging management circuit and the input terminal of the discharging management circuit are respectively connected to the capacitor protection circuit. The charging management circuit includes an ideal diode U4 and a voltage regulator U1. The ideal diode U4 and the voltage regulator U1 form a capacitor charging path. The voltage regulator U1 is connected to a resistor R26, and the two constitute a constant current source. The resistor R26 is connected to the capacitor protection circuit. The supercapacitor protection circuit includes multiple parallel capacitor protection units. Each capacitor protection unit includes a capacitor protection chip, a supercapacitor, and a power resistor. Compared with the prior art, this invention has advantages such as low voltage drop, low power consumption, and the ability to select two specifications of supercapacitors for charging protection.

The utility model discloses a bipolar current collector, a bipolar electrode and a battery, the bipolar current collector comprises a polymer film-based material belt, and the polymer film-based material belt is provided with a positive active region and a negative active region which are arranged in a row; wherein the positive active regions and the negative active regions are alternately arranged at intervals; a blank base film region is arranged between the adjacent positive active region and negative active region; the end part of the positive active region is a positive tab region, and the end part of the negative active region is a negative tab region. According to the utility model, the production process can be simplified, the production efficiency can be improved, metal burrs can be reduced, the battery self-discharge and short circuit phenomena caused by the metal burrs can be avoided, and the safety advantage can be realized.

This invention relates to the field of lithium battery technology and provides a cylindrical lithium battery, comprising: a cylindrical casing having an open end and a closed end, wherein a first through hole is formed at the center of the end face of the closed end; a cell assembly disposed within the casing, including a first electrode near the closed end and a second electrode near the open end, the first electrode and the second electrode having different electrical polarities; a first current collector disposed within the casing and connected to the first electrode of the cell assembly, wherein a boss extending from the first through hole to the outside of the casing is provided at the center of the first current collector; a first electrode lead-out end cap disposed outside the casing and connected to the boss; and a second electrode lead-out end cap disposed at the open end of the casing, connecting the second electrode of the cell assembly and the casing, wherein the second electrode lead-out end cap and the casing are sealed together. The cylindrical lithium battery provided by this invention avoids battery self-discharge and internal short circuits caused by metal dust generated during the battery sealing process.

The present invention discloses a UPS power supply suitable for switch equipment, including a charging module U1 connected to the main power output end of the switch, a battery pack connected to the positive pole of the charging input end of the charging module U1 through a relay K1, the negative pole of the battery pack connected to the negative pole of the charging input end of the charging module U1, the positive pole of the battery pack is used as the positive pole of the battery output through the relay K1, and the negative pole of the battery pack is used as the negative pole of the battery output, and also includes a power-off delay relay K2, the power supply input end of the power-off delay relay K2 is connected to the main power output end, the control end of the power-off delay relay K2 is connected to the main power output end, and the power-off delay relay K2 is provided with a normally open / normally closed contact connected to the control circuit of the relay K1. The present invention can provide fixed delayed power-off protection for equipment in the event of a main power failure; realizes the charge and discharge control of the battery pack, avoids the self-discharge of the battery pack in a non-working state, and can be widely used in the field of power supply technology.