683results about "Lead-acid accumulators" patented technology

The invention relates to a hybrid scrim / paste paper material for a plate-shaped battery electrode (2, 3) of a lead-acid battery, in particular for a positive plate-shaped battery electrode (2) of a lead-acid battery (1), wherein the scrim / paste paper material is designed as a nonwoven or woven mat and comprises: - fibers made of a first material which is chemically unstable, such that the fibers made of the first material dissolve at least substantially upon contact with an electrolyte of the lead-acid battery (1), in particular during the manufacture of the lead-acid battery (1); - fibers made of a second material which is chemically stable at least to the extent that the fibers made of the second material do not dissolve, or do not dissolve substantially, upon contact with the electrolyte of the lead-acid battery (1), in particular during the manufacture of the lead-acid battery (1);and - optionally a binding agent for the fibers from the second material;

The invention relates to the technical field of battery intelligent charging, in particular to an intelligent charging system for a solid-state lead battery energy storage power station. The method comprises the following steps: acquiring a real-time impedance characteristic parameter set and a real-time battery operation parameter set, and determining a multi-dimensional battery state data set according to the real-time impedance characteristic parameter set and the real-time battery operation parameter set; obtaining a renewable energy power generation data set, and based on the renewable energy power generation data set and according to the multi-dimensional battery state data set, carrying out evolution analysis on solid electrolyte impedance fluctuation, and constructing a solid electrolyte impedance evolution model; determining an adaptive battery charging strategy according to the solid electrolyte impedance evolution model; and according to the self-adaptive battery charging strategy, power station charging parameters are adjusted, and a charging adjustment report is determined and output. The passivation speed of the solid electrolyte in the solid lead battery can be slowed down under the condition of intermittent fluctuation of renewable energy power generation, and the service life of the battery is prolonged.

To provide a separator with which it is possible to improve high temperature overcharge life performance in a lead storage battery.SOLUTION: This separator for lead storage batteries includes a crystalline region and an amorphous region. In the X-ray diffraction spectrum of the separator, the crystallinity index indicated by 100×Ic / (Ic+Ia) is 20% or greater. Ic represents the integrated intensity of diffraction peaks, the peak heights of which among the diffraction peaks equivalent to the crystalline region are maximum. Ia represents the integrated intensity of hollows equivalent to the amorphous region.SELECTED DRAWING: Figure 1

The invention discloses a lead-sodium storage battery positive electrode lead paste in the technical field of storage batteries. The lead-sodium storage battery positive electrode lead paste comprises the following components in parts by weight: 100 parts of lead oxide powder, 6-10 parts of sulfuric acid, 14-24 parts of deionized water, 0.05-0.07 part of short fibers, 2-8 parts of lead dioxide, 1-2 parts of tetrabasic lead sulfate, 0.5-1.5 parts of calcium sulfate, 0.05-0.15 part of stannous sulfate, 0.05-0.15 part of antimony trioxide, 0.5-1 part of carbon black, 0.1-0.2 part of carboxymethyl cellulose sodium and 0.1-0.5 part of a mixed carbon material. By improving the design of the process, the formation efficiency and low-temperature performance of the storage battery can be effectively improved, and the service life of the storage battery can be effectively prolonged.

A method performed by battery charger configured to charge a vehicle battery, the method comprising charging the vehicle battery until a first measured voltage over the battery exceeds a first voltage threshold, halting charging for a third time period, measuring a second voltage over the battery at the end of the third time period, determining a battery type using a differential voltage, by calculating a difference of the first voltage threshold and the second voltage, and a set of predetermined conditions, wherein the predetermined conditions comprise:battery⁢ type={Udiff>UPb→lead-acid⁢ battery⁢ typeUdiff<ULi→lithium⁢ battery⁢ typeUPb>Udiff<ULi→unknown⁢ battery⁢ type

There is provided a battery management system for an electric vehicle. The battery management system comprises a first load connector, a second load connector, a first switch, a first battery connector, a second battery connector and a control unit. The first load connector is connectable to a first group. The second load connector is connectable to a second group. The first battery connector is connectable to a first battery. The second battery connector connectable to a second battery. The battery management system is adapted to transfer electric energy from the first battery via the first switch to the first group and to the second group. The battery management system is adapted to connect the second battery to the second group. The control unit is configured to receive a signal representative of a dangerous situation for the first battery. The control unit is configured, in response to the signal, to switch the first switch to disconnect the first battery from the first group and from the second group, and to start transferring electric energy from the second battery to the second group.

The present application relates to the technical field of lead-acid storage batteries. Disclosed is a lead paste of a lead-acid storage battery. The lead paste comprises the following components in parts by weight: 100 parts of a lead powder, 10-12 parts of water, and 9.5-11 parts of sulfuric acid. When the lead paste is used as positive electrode lead paste, the lead paste further comprises 9-11 parts of a positive electrode auxiliary material; and when the lead paste is used as a negative electrode lead paste, the lead paste further comprises 25-35 parts of a negative electrode auxiliary material. The lead paste prepared in the present application can increase the utilization rate of a positive electrode active material, and prolong the service life of a battery while ensuring the capacity of the battery. Zinc-dioxide-coated glass fibers are added to the positive electrode auxiliary material, and the oxide has stable properties in a PbO2 / PbSO4 electrode reaction zone; during the long-term operation process of a battery at a high temperature, a trace amount of zinc dioxide covering the glass fibers permeates into an electrolyte solution; therefore, the formation efficiency of the battery is improved, and the utilization rate of the positive electrode active material is improved.

The present invention relates to a polypropylene composition and a method for preparing the polypropylene composition. The polypropylene composition according to the present invention has improved stress whitening resistance. The present invention also relates to a battery case comprising the polypropylene composition.

The invention provides an intelligent response nano-film and application thereof in waste lead-acid storage battery electrolyte recycling, and relates to the technical field of waste lead-acid storage battery electrolyte recycling, the intelligent response nano-film breaks through performance limitation of an existing film system through a specific intelligent material structure, and when heavy metal ions such as Pb < 2 + >, Fe < 3 + > and Cu < 2 + > enter the film, the intelligent response nano-film can be recycled, and the service life of the intelligent response nano-film is prolonged. The metal ligands are combined with metal ions to cause local shrinkage or closing of pore channels, so that the active defense and intelligent blocking effects of blocking heavy metals are achieved; and when SO4 < 2-> and H < + > pass through the channel, membrane pore channels are kept in an open state, so that rapid acid flux (namely the amount of substance passing through the membrane layer in unit time) of sulfuric acid is realized. The intelligent response nano film has a programmable aperture of a polymer liquid crystal network and an intelligent response valve mechanism of metal, and selective separation of heavy metal and sulfuric acid is realized by stimulating reversible adjustment of an induced film structure.

Embodiments of the present disclosure generally relate to battery management systems, and more particularly relate to a battery regeneration system for optimizing de-sulfation of a lead- acid type storage battery and method thereof The battery regeneration system (100) includes sensors (102), a processor (108), and a memory unit (110). The sensors determine battery parameters during charging and discharging cycles. The processor analyzes the parameters to assess sulphation severity and conductive medium levels in lead-acid battery (104). Using AI- based techniques, processor selects very high-frequency cross-pulsing technique for de- sulfation. The system generates pulse sequence data with adjustable frequency and amplitude, transmitting it to control unit (114) for de-sulfation. Periodically, pulse frequency and amplitude are adjusted within predefined ranges. The control unit receives and applies modified data to lead-acid battery, charging battery to its original condition after de-sulfation. The system also communicates conductive medium level to Battery Monitoring System (BMS) (118).

The invention discloses a composite cathode and anode plate made of a lead-carbon composite material, the composite cathode and anode plate comprises a current collector, a transition layer and an active layer which are compounded in sequence, the transition layer tightly coats the outer surface of the current collector, the active layer tightly coats the outer surface of the transition layer, and the composite cathode and anode plate is prepared by the following method: S1, preparing the composite cathode and anode plate; raw material pretreatment: placing the carbon material in a vacuum oven; according to the invention, the structural design of the composite negative plate and the preparation process are integrated, so that accurate matching of the raw material ratio and the process parameters is realized, and many defects of the traditional electrode are effectively solved; the three-layer gradient structure improves the interface bonding force, and delamination is avoided; the optimized raw material system and the preparation process have a synergistic effect, so that the hydrogen evolution overpotential is remarkably improved, the internal resistance is reduced, the cycle life is prolonged, the low-temperature performance is improved, the energy density is improved, and a reliable technical scheme is provided for the application of the lead-acid storage battery in the high-end field.

The utility model discloses a lead-acid battery and sodium-ion battery mixed energy storage system which comprises a sodium-ion battery pack string, a lead-acid battery, a lead-acid battery management system, a controller module and a heating plate, the lead-acid battery management system comprises a first temperature sensor, a second MCU and an RS485 communication interface, and the second MCU is connected with the first temperature sensor and used for collecting temperature data of the lead-acid battery and sending the temperature data of the lead-acid battery to the controller module through the RS485 communication interface; the heating plate is connected with the sodium-ion battery pack string through the first relay, the controller module controls the first relay to achieve connection and disconnection between the heating plate and the sodium-ion battery pack string, the temperature of the lead-acid battery is stabilized between 20 DEG C and 25 DEG C through the heating plate, and the capacity of the lead-acid battery is kept in the optimal state.

A positive electrode lead paste for a high-capacity and long-service-life storage battery and a preparation method therefor. The formula of the positive electrode lead paste comprises lead powder, dilute sulfuric acid, water and additives. In parts by mass, the additives added to every 1000 parts of the lead powder comprise: 1-3 parts of sodium perborate; 0.5-2 parts of 4BS; 1-3 parts of antimony trioxide; 1-3 parts of tin pyrophosphate; 2-4 parts of a polyolefin; 2-4 parts of a conductive carbon material; and 1-1.5 parts of a polyester staple fiber. By adding tin pyrophosphate and the polyolefin in the positive electrode lead paste, the capacity of a lead storage battery can be effectively increased and the service life thereof can be prolonged; and tin pyrophosphate and the polyolefin can work synergistically, and the addition of the two together achieves a better effect.

The invention discloses a polymer composite separator for a lead-acid storage battery and a preparation method thereof, and belongs to the technical field of separator preparation, the polymer composite separator comprises the following raw materials by weight: 40-55 parts of ultra-high molecular weight polyethylene, 0.5-1 part of an initiator, 0.5-1.5 parts of sodium allyl thioglutamate, 105-115 parts of silicon dioxide, 10-20 parts of alkyl succinic anhydride modified cyclodextrin, and 180-260 parts of filling oil; the preparation raw materials of the sodium allyl thioglutamate comprise glutamic acid and allyl isothiocyanate, the sodium allyl thioglutamate and the alkyl succinic anhydride modified cyclodextrin are introduced into the preparation raw materials of a traditional PE partition plate, and finally the prepared polymer composite partition plate for the lead-acid storage battery has high porosity and low resistivity; and the anti-oxidation performance is excellent, the puncture-resistant strength is high, and the development of the lead-acid storage battery industry towards the direction of high energy density and long cycle life is facilitated.

The invention discloses a lead-acid storage battery vent bolt which comprises a bolt body, a cylindrical containing cavity is formed in the bolt body, a clamping groove used for being connected with a gas filtering piece in a clamping mode is formed in the end, corresponding to the containing cavity, of the bolt body, and a long-strip-shaped groove hole is formed in the side wall, corresponding to the other end of the containing cavity, of the bolt body; the suppository core is detachably connected into the containing cavity, a plurality of partition plates are sequentially and obliquely arranged on the suppository core at intervals from one end to the other end, a reverse inclination angle is formed between every two adjacent partition plates, supporting columns are arranged between every two adjacent partition plates, and the partition plates divide a plurality of partition cavities in the containing cavity from one end to the other end. According to the single-layer cover of the lead-acid storage battery, the risk of liquid overflow can be reduced, the single-layer cover is convenient to disassemble and use, and the requirement of an exhaust system for mutually independent unit cells required by the design of a single-layer cover of the lead-acid storage battery is met.

The embodiment of the invention discloses a secondary battery and electric equipment, the secondary battery comprises an electrode assembly, the electrode assembly comprises a plurality of first pole pieces and a plurality of second pole pieces, and the secondary battery comprises a first coating; the first coating comprises a plurality of first coating blocks, the plurality of first coating blocks are arranged on the surface, facing the second pole piece, of the first pole piece, a first channel is formed between any two adjacent first coating blocks, the first channel is at least communicated with one edge of the first pole piece, and the first channel exposes at least part of the surface, facing the second pole piece, of the first pole piece; the first coating is melted when the temperature is higher than a first preset temperature and at least partially covers the first channel, the area of the first pole piece covered by the first coating after melting is X1, the area of the first pole piece covered by the first coating before melting is Y1, and X1 is larger than Y1. According to the embodiment of the invention, the area of the first coating after melting is increased, so that heat generated by continuous contact reaction between the active particles of the first pole piece and the electrolyte can be slowed down, and the probability of thermal runaway of the secondary battery is reduced.

The invention discloses a battery repair liquid and repair filling equipment thereof, and the battery repair liquid comprises deionized water, and further comprises a vulcanization supplement and an electrolyte supplement according to repair type requirements; the vulcanizing supplement further comprises a chelating agent, a sodium sulfate solution, a corrosion inhibitor and a polyoxyethylene ether surfactant; the invention relates to the technical field of battery repair, through deep cooperation of a targeted repair liquid formula and intelligent equipment, the core damage problems of lead-acid battery vulcanization, electrolyte degradation and the like are solved, a modular storage tank, a dynamic mixing system and a multi-mode activation technology are innovatively integrated, the repair efficiency is greatly improved, the equipment adopts a portable design, and the cost is low. And rapid deployment and multi-scene application are supported, a vulcanization / electrolysis double-repair mode can be accurately matched in cooperation with an intelligent diagnosis system, a single machine can complete a complex repair process needing cooperation of multiple sets of equipment in a traditional process, and the repair efficiency is improved.

The invention relates to a lead-acid battery negative electrode additive as well as a preparation method and application thereof, and belongs to the technical field of lead-acid storage batteries. The additive consists of sulfonated modified lignosulfonate (component A), a graphene oxide-carbon nanotube hybrid conductive agent (component B) and a mixture of modified humic acid and boric acid (component C) which are respectively used as a crystallization template agent, a conductive network construction agent and an interface film forming regulator. During preparation, a component A is prepared through a sulfomethylation reaction, a component B is prepared through ultrasonic mixing of graphene oxide and a carbon nanotube dispersion liquid, a component C is prepared after humic acid is subjected to acid pickling purification and oxidation treatment and then mixed with boric acid, and finally the three components are mixed to obtain a finished product. The additive is added into the negative electrode lead paste, can inhibit negative electrode sulfation, improve electrode conductivity, reduce hydrogen evolution side reaction and prolong the cycle life and charge-discharge efficiency of the battery, and is suitable for production of various lead-acid batteries.

The invention relates to a graphene lead oxide powder composite material as well as a preparation method and application thereof, belongs to the technical field of composite materials, and aims at solving at least one of the problems of complex preparation method, high cost, low purity, low graphite-to-graphene conversion rate, poor performance and the like of the existing graphene lead oxide powder composite material. The preparation method of the graphene and lead oxide powder composite material comprises the steps that graphite powder, lead nitrate and ammonium nitrate react for 2-4 h at the temperature of 400-500 DEG C, gas generated in the reaction is recycled, solids obtained in the reaction are ground, and the graphene and lead oxide powder composite material is obtained. The graphene and lead oxide powder composite material can be obtained only through one-step reaction, only graphite powder needs to be adopted as a raw material, expensive graphene does not need to be used, the production process is simple, any intermediate operation is not needed, the carbon content of the graphene and lead oxide powder composite material prepared through the method is 18-28%, the purity is 80-90%, and the graphene and lead oxide powder composite material is suitable for industrial production. And the conversion rate from graphite to graphene is 80-90%.

The application discloses a lead-based composite material and a preparation method thereof, a lead-acid battery composite current collector and a lead-acid battery, wherein the lead-based composite material comprises: a substrate; a conductive MXene layer arranged on the surface or part of the surface of the substrate; a metal modification layer arranged on the surface of the conductive MXene layer, wherein the metal type of the metal modification layer is selected from one or more of copper, nickel, silver, gold, platinum, magnesium, zinc, tin, chromium, antimony and bismuth; and a lead-based layer arranged on the surface of the metal modification layer. By jointly using the metal modification layer and the conductive MXene layer, the problem of poor composite bonding force between different substrate surfaces and the lead-based layer can be solved.

The invention discloses a lead-sodium storage battery in the technical field of storage batteries, which comprises a positive plate, a negative plate and electrolyte: the positive plate comprises positive lead plaster and a positive grid, and the positive lead plaster comprises 100 parts of lead oxide powder, 6-12 parts of sulfuric acid, 5-15 parts of deionized water, 0.05-0.1 part of short fiber or conductive graphite fiber and 0.4-2 parts of mixture; the negative plate comprises negative lead paste and a negative plate grid, and the negative lead paste comprises 100 parts of lead oxide powder, 6-12 parts of sulfuric acid and 5-15 parts of deionized water; 0.05-0.1 part of short fibers or conductive graphite fibers and 1-10 parts of a mixture; and the electrolyte comprises 0.01-0.6 part of silicon dioxide, 30-50 parts of 98% anhydrous concentrated sulfuric acid, 2-7 parts of a sodium compound, 0.1-0.15 part of stannous mono-sulphate, 0.5-0.8 part of phosphoric acid, 1-2 parts of vanillin and 40-60 parts of deionized water. According to the lead-acid storage battery electrolyte, good low-temperature resistance of the lead-acid storage battery can be effectively realized, and the service life of the storage battery is prolonged.

The invention provides a lead-acid storage battery equalization method and device, and relates to the technical field of battery equalization, and the method comprises the steps: responding to the start of equalization detection, disconnecting a battery pack from an external circuit, and collecting the performance data of each battery in the battery pack; analyzing according to the performance data of each battery so as to determine an equalization condition in the battery pack; and controlling the lead-acid storage battery equalization device to perform equalization operation on the batteries in the battery pack according to the equalization condition. Through the performance data of the battery, the detection of the balance condition of the battery pack is realized, the battery pack is balanced in time, the reduction of operation efficiency caused by imbalance of the battery pack is avoided, and the operation efficiency of the battery pack is improved.

The invention discloses an electrolyte for a lead storage battery, which is prepared by adding anhydrous sodium sulfate, magnesium sulfate, sodium tetraborate decahydrate, ferrous sulfate heptahydrate, perfluorooctyl amine sulfonate and disodium ethylene diamine tetraacetate into the electrolyte according to a certain mass percent, the chelate is of a spatial network structure and can lock a positive active material and effectively delay falling of the positive active material, especially a surface active material, and conductive particles are uniformly distributed in the spatial network structure, so that the conductivity of the system is greatly improved, the charging efficiency is improved, and the water loss of the battery is reduced; the added sodium tetraborate decahydrate has a further buffering effect on the corrosion of the grid, and the formula delays the corrosion of the positive grid from multiple aspects; therefore, the cycle life of the lead storage battery, especially the lead storage battery for an electric bicycle, is prolonged, and the capacity of the battery can be ensured by adding the perfluorooctyl sulfonic acid amine.

The invention provides an additive for negative electrode lead paste of an ultralow-temperature lead storage battery, a preparation method of the negative electrode lead paste of the ultralow-temperature lead storage battery and the ultralow-temperature lead storage battery. The additive for the negative electrode lead paste of the ultralow-temperature lead storage battery comprises the following components in parts by mass: 4-5 parts of sodium lignosulfonate, 1-3 parts of L-cysteine, 1-2 parts of monopotassium phosphate, 2-3 parts of acetylene black, 0.5-1 part of graphene, 6-8 parts of barium sulfate, 1-2 parts of bismuth oxide and 1-1.5 parts of polyester staple fibers. According to the invention, L-cysteine and monopotassium phosphate which have a decisive effect on the realization of the ultralow-temperature capacity of an ultralow-temperature battery product are introduced, and the L-cysteine and the monopotassium phosphate are matched and cooperated to promote the realization of the ultralow-temperature charging and discharging capacity.

The invention discloses an ultrathin titanium substrate grid and a lead-acid battery, and belongs to the technical field of lead-acid batteries. In order to solve the problem that the energy density of a lead-acid battery is reduced due to the fact that the total weight ratio of an existing lead-acid battery grid on a polar plate is too high, the thickness of the ultrathin titanium-based grid is 0.1-0.18 mm, the ideal thickness of the ultrathin titanium-based grid is 0.15 mm, a titanium-based grid body is of a pull net type structure, and the diagonal size of rhombic meshes is 0.5-1.5 mm * 0.5-1.5 mm; a covered edge is arranged around the grid body, and the width of the covered edge is 0.5-1.0 mm; a tab is arranged at a position 5.0-10.0 mm away from a center line in the width direction of the grid, and a screw hole is formed in a position 3.0-5.0 mm away from the upper end of the tab and used for being connected with a positive electrode and a negative electrode respectively. According to the ultrathin titanium-based grid, the density is reduced while high mechanical strength is reserved, the number of positive and negative grids used by a 2V4Ah lead-acid battery adopting the ultrathin titanium-based grid is not more than 4, the weight of each grid is about 2-3 g, and the energy density of the battery can reach 70 Wh / kg.

A lead-acid storage battery gel electrolyte resistance testing device belongs to the technical field of lead-acid storage battery testing and comprises a support, a container is arranged on the support, and a pressing mechanism is arranged at the upper end of the container. According to the invention, a four-terminal alternating current method measurer is adopted to measure the electrolyte resistance, so that the precision of electrolyte resistance measurement is improved. Graphite is used as an electrode, so that the accuracy of electrolyte resistance measurement is improved, in addition, in order to increase the contact area between the electrolyte and the lower graphite disc and the contact area between the electrolyte and the upper graphite disc, hemispherical contacts are arranged on the contact surface between the lower graphite disc and the electrolyte, and the contact area between the lower graphite disc and the upper graphite disc is increased. A lower convex ring and a radiation strip are arranged on the contact surface of the upper graphite disc and the electrolyte, in addition, the end parts of the lower graphite disc and the upper graphite disc are designed through a conductive conical column and a connecting conical column which are made of copper alloy and through a conical surface structure, and meanwhile, electric force compound grease with copper, aluminum and other particles is filled between the conductive conical column and the connecting conical column; therefore, the electrical conductivity is improved.

The invention provides a battery aging degree evaluation method, system and device and electronic equipment, and is applied to the technical field of batteries. The method comprises the steps that after it is monitored that the battery voltage of a lead-acid storage battery monomer is smaller than preset battery cut-off voltage, the target open-circuit voltage of the lead-acid storage battery monomer is obtained, and the target open-circuit voltage is determined according to the mass of components in gas separated out of an air overflow valve of the lead-acid storage battery monomer; determining a target charge state corresponding to the target open-circuit voltage based on a preset corresponding relationship between the charge state and the open-circuit voltage; according to the target charge state and the rated capacity of the lead-acid storage battery monomer, the battery health state of the lead-acid storage battery monomer is determined, and the battery health state reflects the battery aging degree. According to the application, the open-circuit voltage of the lead-acid storage battery monomer is determined according to the component quality in the gas separated out by the gas overflow valve, the accuracy of the open-circuit voltage is improved, the accuracy of a battery aging degree evaluation result is further improved, and online monitoring is facilitated.

The invention relates to the technical field of storage batteries, in particular to a balanced maintenance device and method for online monitoring of a lead-acid storage battery pack, and the method comprises the steps: a battery online monitoring module obtains the residual capacity of a battery according to the charging and discharging current of the lead-acid storage battery pack; the battery equalization control module measures the voltage of the single batteries of the lead-acid storage battery pack by using a divider resistance method; when it is monitored that the voltage difference between the highest voltage and the lowest voltage of the single batteries of the lead-acid storage battery pack exceeds a preset voltage difference threshold value or the difference value of the residual capacities of the different single batteries exceeds a preset electric quantity difference threshold value, a pulse width modulation signal is output; and the battery discharge control module regulates and controls the balanced discharge power of the power resistor according to the pulse width modulation signal and the temperature value of the power resistor radiator, and carries out balanced discharge control through the balanced discharge power. According to the invention, the balanced discharge power of the power resistor is cooperatively controlled by dynamically adjusting the duty ratio of the pulse width modulation signal and the temperature, so that balanced discharge of the battery pack is effectively ensured.

The present disclosure relates to a battery system with adjustable heating rate and control method thereof, the battery system comprises a battery pack, a heating plate, a power control module, and a battery management system; when the temperature of the battery pack is lower than the preset self-heating switch-on temperature, the power control module is turned on, and the battery management system transmits the collected status information of the battery pack to the power control module, the power control module adjusting the current on-off time and switching frequency of the heating plate through a PWM signal to adjust the heating power and heating rate, to realize self-heating of the battery; when the temperature of the battery pack reaches the preset self-heating switch-off temperature, the power control module is turned off to stop heating; wherein, the power control module further includes a current adjustment module, a current acquisition module, and a heating control module. The present disclosure can realize the beneficial effects of fast heating rate, long driving range, and fast charging at low temperature of the power battery system.

The invention relates to the technical field of lead-acid batteries and novel electrochemical energy storage materials, in particular to a graded porous carbon negative electrode material with nano-metal synergistic activity and application of the graded porous carbon negative electrode material in a long-life lead-carbon battery. The material takes hierarchical pore structure carbon as a matrix (which has micropores, mesopores and macropores at the same time, and the specific surface area reaches 1000m < 2 > / g), and is uniformly loaded with nano metal particles (such as Fe, Co, Sn and the like with the particle size of lt; and the content is 1%-10%). By optimizing the carbon pore structure and introducing the nano-metal, sulfation is remarkably inhibited, the capacitance effect is enhanced, and the hydrogen evolution reaction is reduced, so that the cycle life of the lead-acid battery is prolonged, and the charge-discharge performance of the lead-acid battery is improved. The preparation method is simple and controllable, is suitable for a lead-acid battery negative electrode additive, can be widely applied to the fields of start-stop batteries, energy storage systems and the like, and has important industrial application value.