41results about How to "Normal charge and discharge" patented technology

The invention provides a power system for an electric vehicle. The system comprises a power battery; a charging and discharging socket; a bidirectional DC / DC module; a drive control switch; a bidirectional DC / AC module; a motor control switch; a charging and discharging control module; a battery manager; and a controller module connected with the drive control switch, the motor control switch, the charging and discharging control module and the battery manager. The motor control module is used for controlling the drive control switch, the motor control switch and the charging and discharging control module to control the power system to enter the charging and discharging mode, as well as controlling the power battery to perform pulse charging and discharging to heat the power battery when the temperature of the power battery is lower than the preset temperature. When the temperature of the power battery is low, the power system can control the power battery to perform pulse charging and discharging to heat the power battery for temperature rise, so as to activate the power battery. The invention further provides an electric vehicle and a charging method for a power battery of the electric vehicle.

The invention discloses a battery heating method and heating system and a battery. The battery comprises a battery roll core, a switch circuit and a heating device, wherein the heating device is arranged on an outer surface of the battery roll core, the battery roll core comprises a positive pole plate, a negative pole plate, a first separator, a positive tab and a negative tab, the positive pole plate and the negative pole plate are wound with each other, the first separator is arranged between the positive pole plate and the negative pole plate, the positive tab is arranged on the positive pole plate, the negative tab is arranged on the negative pole plate, the heating device is connected with the positive tab and the negative tab respectively, the switch circuit is connected in series between the heating device and the positive tab or the negative tab, and when the switch circuit is closed, the heating device releases heat after a current flows through the heating device so as to heat the battery in the battery. Through the abovementioned mode, the heat can be generated in an extremely low-temperature environment, so that the battery can normally charge and discharge in the extremely low-temperature environment.

The invention relates to a method for improving the durability of a lithium-ion power battery, and the lithium-ion power battery. The method comprises the following steps: conducting calcination on needle coke, and then carrying out high-pressure impregnation, graphitization treatment, pulverization for granulation, coating, and halogenation for purification to obtain an anode material capable of effectively improving the durability of the lithium-ion power battery; on the basis of the anode material, further preparing a negative pole piece and the lithium-ion power battery. The method has the advantages that the electrolyte absorptivity and the preserving capability of the anode material are improved, so that the negative pole piece made of the anode material can preserve more electrolyte; when the method is applied to a lithium-ion power battery encapsulated in a vacuum manner with an aluminum-plastic film, the defect that the quantity of preserved electrolyte is too small as the space between an aluminum-plastic film shell body and a battery core is too small can be overcome. Therefore, the aim to improve the durability of the lithium-ion power battery can be achieved.

The invention discloses an unmanned aerial vehicle, a battery module and a charge-discharge control method. The battery module comprises a battery body, an outer case, a heat conducting assembly, a first heating piece, a second heating piece, a temperature sensor and a control assembly, wherein the battery body is arranged in the outer case; the heat conducting assembly is connected between the outer case and the battery body in a heat conducting manner; the first heating piece is used for heating the battery body; the second heating piece is used for heating the heat conducting assembly; the temperature sensor is used for detecting temperature of the battery body and producing a temperature signal according to the detected temperature of the battery body; the control assembly is electrically connected with the first heating piece, the second heating piece and the temperature sensor and used for receiving the temperature signal and controlling the first heating piece and the second heating piece according to the temperature signal. According to the battery module, normal charge and discharge of the battery module can be guaranteed, charge-discharge performance of the battery module can be improved, and heat produced by the battery body can be dissipated effectively and rapidly in time.

Provided is a novel multifunctional electrolyte which comprises lithium salts, a novel cosolvent and a functional compound. The novel cosolvent comprises line style carbonic ester and annular carbonic ester, wherein, line style carbonic ester with a low melting point and low viscosity accounts for the majority of the novel cosolvent, and the novel cosolvent is enabled to perform good charge and discharge performance at low temperature by compounding line style carbonic ester and annular carbonic ester according to an optimized ratio. The functional compound is obtained by mixing compounds A and compounds B, wherein, compounds A have a good film forming characteristic and maintain stable at high temperature, which enables cycle performance of a battery to be effectively improved, pneumatic swelling of the battery to be avoided and high temperature performance of the battery to be enhanced, and compounds B are phosphate ester compounds with a low melting point, which enables low temperature performance of the battery to be further enhanced on the one hand and safety performance of the battery to be substantially improved on the other hand thanks to the flame retardation characteristic of phosphate ester compounds. Through component and ratio optimization, the problems of low temperature performance, high temperature performance, safety performance, cycle performance and pneumatic swelling of the electrolyte are well solved simultaneously.

The invention provides a heat preservation method and heat preservation device for a lithium battery at a low temperature. An intelligent temperature control system detects an environmental temperature of the lithium battery and sets an upper limit value and a lower limit value of the temperature; when the environmental temperature of the lithium battery is lower than the lower limit value, the intelligent temperature control system heats a heating layer of the lithium battery in an electric heating manner; and when the environmental temperature of the lithium battery reaches the upper limit value, the intelligent temperature control system stops heating the heating layer of the lithium battery, so that the temperature of the lithium battery is kept in a set range, and normal charging and discharging in an external environment at the low temperature are achieved. According to the heat preservation method and the heat preservation device for the lithium battery at the low temperature, the internal environmental temperature of the lithium battery can be detected and regulated in real time, so that the lithium battery can achieve normal charging and discharging functions in the external environment at the relatively low temperature, the application range is expanded and the enterprise competitiveness is strengthened.

The invention belongs to the technical field of batteries and particularly relates to a battery pole piece structure. The battery pole piece structure comprises pole pieces, wherein the pole pieces comprise a positive pole piece and a negative pole piece; electrode leads and electric heating leads are arranged on the pole pieces. Before a battery comprising the battery pole pieces is charged in a low-temperature environment, the electrode leads and the electric heating leads can be communicated with an external power supply respectively, so that the pole pieces form a power-on circuit, the external power supply introduces high pulse current into the pole pieces, the pole pieces are preheated rapidly, the battery can be charged normally when the pole pieces are preheated to 15-35 DEG C, and accordingly, a rapid charging temperature environment is provided for the battery. Besides, the preheating mode can be also used in a battery discharging condition, the external power supply introduces high pulse current into the pole pieces, so that the battery is preheated to be higher than subzero 10 DEG C, and accordingly, the battery can be discharged in a normal temperature environment. The invention further relates to a lithium ion battery.

The invention discloses an all-solid-state battery and a preparation method thereof. The all-solid-state battery comprises a positive electrode plate, a solid-state electrolyte layer and a negative electrode plate, wherein the positive electrode plate comprises a current collector and a positive electrode material layer, the positive electrode material layer comprises a positive electrode active material and an ionic conductive agent, the positive electrode active material is FeS, and the ionic conductive agent is sulfide. The solid electrolyte layer comprises solid electrolyte which is sulfide. The preparation method disclosed by the invention comprises the following steps: S1, blending positive electrode slurry, coating the positive electrode slurry on the current collector, and performing drying to obtain the positive electrode plate; S2, blending solid electrolyte slurry, coating the positive electrode plate with the solid electrolyte slurry, and performing drying to obtain the solid electrolyte layer; step S3, under a vacuum condition, superposing the negative electrode plate on the solid electrolyte layer, and performing heating and pressurizing to obtain the all-solid-statebattery. The all-solid-state battery which has high energy density, good cycle performance and rate capability and can be normally charged and discharged under self-sustaining voltage is obtained by the method disclosed by the invention.

The invention belongs to the technical field of solar thermal power generation, provides an independent cyclic heat storage and electric power storage and cascaded heat exchange and evaporation technology and relates to a large-scale solar thermal power station formed by being combined with trough type solar concentrators, tower type solar concentrators and the like with molten salt or sulfur and quick sand as heat storage and heat transfer fluid. According to the solar thermal power station, the brand new cascaded evaporation technology is adopted while the integrated design of heat storage and electric power storage is considered, standardization and mass production of manufacturing of solar power generation equipment are promoted, and the investment cost of the power station can be lowered; the power supply capacity of the solar thermal power station is improved, the operating cost of the solar thermal power station is lowered, the power generation hours are increased substantially, and the capability of the solar thermal power station competing with fossil energy power generation is improved.

The invention discloses heat-insulating anti-freezing electric vehicle battery shell material and relates to the technical field of manufacture of electric vehicles; the heat-insulating anti-freezing electric vehicle battery shell material is prepared from, by weight, 10-15 parts of bismaleimide resin, 10-15 parts of polyvinyl chloride paste resin, 10-15 parts of polyethylene glycol terephthalate, 5-10 parts of plastic drink bottle cap reclaimed particles, 5-10 parts of powdery nitrile rubber, 3-6 parts of terpene resin, 3-6 parts of polyoxyethylene, 2-4 parts of modified asbestos wool, 2-4 parts of sepiolite fiber, 1-2 parts of a weatherable aid, 1-2 parts of ethoxylated trimethylolpropane triacrylate, 0.5-1 part of N,N'-4,4'-diphenylmethane-bismaleimide, and 0.5-1 part of barium metaborate. The heat-insulating anti-freezing electric vehicle battery shell material has excellent heat-insulating and anti-freezing effects, can prevent a battery from being damaged by high temperature or low temperature, and enables a battery to charge and discharge normally even at high and low temperatures so that the service life of the battery is prolonged.

The invention provides a battery pack air cooling system. The battery pack air cooling system comprises a box body and a fan which is disposed outside the box body and communicated with the interior of the box body by virtue of a guide pipe, wherein an inner cavity of the box body is divided by a first guide plate, a second guide plate and a third guide plate which are arranged in the inner cavity of the box body into a first guide air duct, a battery assembling cavity, a second guide air duct and a third guide air duct, the first guide air duct is communicated with the third guide air duct by virtue of a first guide hole formed at a position adjacent to the bottom end of the first guide plate, the third guide air duct is communicated with the battery assembling cavity by virtue of a third guide hole formed in the third guide plate, and the battery assembling cavity is communicated with the second guide plate by virtue of a second guide hole formed in the second guide plate; and an air outlet of the fan is communicated with the first guide air duct by virtue of the guide pipe, and the second guide air duct is communicated with the exterior by virtue of the guide pipe. The battery pack air cooling system can perform heat dissipation and water resistance for a battery pack, and is relatively homogenous in heat dissipation, simple in structure, and good in heat dissipation effect.

The invention discloses a top cap for a lithium ion battery. The top cap comprises a top cap cover plate, an electrolyte injecting hole, an explosion-proof hole, a first electrode pole and a second electrode pole, wherein the electrolyte injecting hole and the explosion-proof hole are formed in the top cap cover plate; the first electrode pole and the second electrode pole respectively penetrate through the top cap cover plate and are fixed on the top cap cover plate; the first electrode pole is conductively connected with the top cap cover plate; the second electrode pole is in insulated connection with the top cap cover plate; in addition, an electric connecting sheet which is conductively connected with the second electrode pole is arranged on the second electrode pole; a voltage measuring hole is also formed in the top cap cover plate; an overcharge preventing device is arranged above the voltage measuring hole, is electrically connected with the top cap cover plate and is locatedbelow the electric connecting sheet; when the internal air pressure inside the battery is greater than or equal to a preset value, the overcharge preventing device is electrically connected with the electrical connecting sheet; when the air pressure inside the battery is smaller than the preset value, the overcharge preventing device is in insulated assembly with the electrical connecting sheet.

The invention discloses a porous silicon copper coated electrode for a lithium ion battery and a preparation method thereof. The porous silicon copper coated electrode is in a cylindrical shape and consists of copper coated porous silicon particles; each copper coated porous silicon particle consists of an outer case and an inner core; the outer case is a copper particle and is of a porous nanostructure; the inner core is porous silicon. The preparation method comprises the following steps of (1) polycrystalline silicon powder pretreatment; (2) nanometer Ag particle deposition; (3) porous silicon preparation; (4) outer case preparation; (5) electrode formation. The porous silicon copper coated electrode has the advantages that the copper particles and silicon are organically and tightly combined; the contact area is increased; the contact resistance is effectively reduced; the electrode electroconductibility is greatly improved; the volume expansion of the silicon in a lithiation process is limited to the greatest degree by the copper particles; the lithium ion battery failure due to falling and separation of the silicon from the surface of a current collector in the battery cyclic charging and discharging processes can be effectively prevented, so that the service life of the lithium ion battery is prolonged; the cyclic stability of the lithium ion battery is improved.

The invention relates to a battery temperature control method and a battery temperature control circuit. The battery temperature control method comprises the steps of obtaining a first detection signal corresponding to an environment temperature; detecting whether the first detection signal is matched with a first preset signal or not; when the first detection signal is matched with a first presetsignal, obtaining a second detection signal corresponding to the battery temperature; detecting whether the second detection signal is matched with a second preset signal or not; and when the seconddetection signal is matched with the second preset signal, starting a heating circuit. According to the method, the matching condition of the first detection signal and the first preset signal is detected. When the first detection signal is matched with the first preset signal, it is indicated that the environmental temperature is low. At this moment, the matching condition of the second detectionsignal and the second preset signal is further detected. When the second detection signal is matched with the second preset signal, it is indicated that the temperature of the battery is low. After that, the heating circuit is started to heat the battery, so that the temperature of the battery rises. The normal charging and discharging of the battery in the low-temperature environment can be ensured.

The invention relates to a gel electrolyte suitable for a -20 DEG C zinc-based battery as well as preparation and application of the gel electrolyte. The invention discloses a preparation method of an anti-freezing gel electrolyte for a zinc-based battery, which aims to reduce the freezing temperature of the gel electrolyte taking sodium alginate-polyacrylamide as a matrix through the synergistic hydration effect of zinc salt and lithium salt. The anti-freezing hydrogel immersed in zinc salt and lithium salt is used as an electrolyte, shows good freezing resistance and mechanical properties, and has excellent low-temperature tolerance and cycle stability. The problems that the conventional electrolyte cannot work normally due to limited use below zero DEG C, the preparation process is tedious and the ionic conductivity is low are overcome.

The invention relates to a battery current detection circuit for communication. The battery current detection circuit comprises a current sampling circuit, a differential amplification circuit, a compatible conversion circuit, an output shaping circuit and a central processing unit. An output end of the current sampling circuit is electrically connected with an input end of the compatible conversion circuit and an input end of the compatible conversion circuit; the output end of the differential amplification circuit is electrically connected with the other input end of the compatible conversion circuit; the output end of the compatible conversion circuit is electrically connected with the input end of the output shaping circuit; and the output end of the output shaping circuit is electrically connected with the input end of the central processing unit. According to the battery current detection circuit for the communication provided by the invention, different sampling devices are compatible, the output shaping circuit can detect charge and discharge states of a battery in real time, a circuit structure is simple, and detection precision is relatively high.

The invention provides an anti-reverse-connection protection circuit. The anti-reverse-connection protection circuit comprises a first detection unit, a second detection unit and a battery managementsystem. The first detection unit and the second detection unit are electrically connected with an external port of the electrochemical device, and the first detection unit and the second detection unit are used for detecting parameters of the external port; when the external port is electrically connected with external equipment, the first detection unit and the second detection unit respectivelyoutput a first detection signal and a second detection signal to the battery management system according to parameters of the external port. The invention further provides an anti-reverse-connection protection method and an electrochemical device. By detecting the parameters of the external port and respectively outputting the first detection signal and the second detection signal to the battery management system according to the parameters, whether the external port is reversely connected with the external equipment or not is determined; the method has the advantages of being low in cost, high in detection precision, wide in detection range and the like; the safety and stability of the battery can be improved.

The invention discloses an energy storage management system based on ubiquitous power Internet of Things. The system comprises a new energy power generation side used for generating power by using new energy; a battery management system used for storing electric energy of a new energy power generation side, measuring data information in real time and sending the data information to the cloud storage and data analysis server; a data collection unit used for collecting electric power data and uploading the electric power data to the cloud storage and data analysis server after primary processing; a cloud storage and data analysis server is used for receiving and analyzing the power data in real time and generating a control scheduling strategy; a monitoring center used for receiving the power data and the control scheduling strategy and synchronizing them in real time; and an intelligent power distribution cabinet used for receiving the control scheduling strategy or a power scheduling instruction, deploying electric energy and adjusting a power distribution state of a user side. The collected electric power data are stored and analyzed through the cloud storage and data analysis server of the cloud end, data generated in the battery management system are analyzed in real time, and normal charging and discharging in the energy storage management system are guaranteed to the maximum extent.

The invention discloses a high-voltage, low-temperature-resistant and three-chamber structured zinc-polymer aqueous rechargeable battery and a preparation method thereof. The high-voltage, low-temperature-resistant and three-chamber structured zinc-polymer aqueous rechargeable battery comprises a positive electrode, a negative electrode, a cation diaphragm, an anion diaphragm, a positive electrode electrolyte, a negative electrode electrolyte and an intermediate transition electrolyte, the positive electrode is prepared by polymerizing small organic molecules through cyclic voltammetry and depositing the small organic molecules on a porous activated carbon substrate, high specific capacitance is given to the device by redox reaction between a polymer and electrolyte ions, and the positive electrode and the negative electrode are placed in different reaction environments through the cation diaphragm and the anion diaphragm respectively, so that oxygen evolution and hydrogen evolution reactions are effectively inhibited; the working voltage of the battery reaches 2.5 V, and a discharge platform is between 1.7 V and 1.9 V, depending on the selection of the polymer and the electrolyte.

The present invention provides a single secondary battery formation method. According to the single secondary battery formation method, a plurality of single secondary batteries requiring formation are connected in parallel to form a discharged battery module, a plurality of single secondary batteries requiring formation are connected in parallel to form a rechargeable battery module, the voltage difference exists between the discharged battery module and the rechargeable battery module, the discharged battery module and the rechargeable battery module are connected in parallel to form a charging-discharging loop after the discharged battery module and a voltage increasing energy storage batter module are connected in series, the voltage increasing energy storage batter module is connected with a charging circuit capable of maintaining the stable voltage of the voltage increasing energy storage batter module, and when the single secondary batteries in the discharged battery module perform formation discharging, the single secondary batteries in the discharged battery module and the voltage increasing energy storage batter module always being at the voltage-stabilizing state co-perform the charging on the single secondary batteries in the rechargeable battery module so as to complete the charging formation of the single secondary batteries in the rechargeable battery module. The single secondary battery formation method has characteristics of effective energy source utilization, single battery batch formation achieving, and formation efficiency increasing.

The present invention proposes a track energy feedback system and its control method. The track energy feedback system includes a monitoring device and a first energy storage module and a second energy storage module respectively connected to the monitoring device. The method includes: the monitoring device acquires the first energy storage The operating status information of the module; according to the operating status information, it is judged whether the first energy storage module fails; if the first energy storage module fails, the second energy storage module is controlled to perform charging or discharging compensation. The invention provides a redundant backup energy storage module to perform charging and discharging compensation through the backup energy storage module when a conventional energy storage module fails, thereby greatly improving the quality and reliability of power supply, and simultaneously improving the utilization rate of the energy storage system.

The invention discloses a high-voltage, low-temperature-resistant, three-chamber zinc-polymer water-based rechargeable battery and a preparation method thereof. Liquid, the positive electrode is prepared by polymerizing small organic molecules and depositing them on the porous activated carbon substrate by cyclic voltammetry, relying on the oxidation-reduction reaction between the polymer and the electrolyte ions to endow the device with a high specific capacitance, and the positive and negative ion membranes connect the positive electrode The negative electrode and the negative electrode are placed in different reaction environments, which can effectively inhibit the oxygen evolution and hydrogen evolution reactions, so that the working voltage of the battery can reach 2.5 V, and the discharge platform is between 1.7 and 1.9 V, depending on the choice of polymer and electrolyte.

The invention relates to a battery box system with a heating function. The battery box system comprises a battery box body, a battery fixing piece and a plurality of single batteries, the plurality ofsingle batteries are divided into a plurality of battery packs, and a heating pipeline is arranged beside each battery pack. A heating reaction device is arranged beside the battery box body and comprises a mixing box, a condensing box, a heat exchanger, a filtering box, a drying box, a raw material box and a water tank, the raw material box contains the sodium acetate and puts the raw materialsinto the mixing box to be mixed with the water fed into the water tank, and the mixed aqueous solution is pumped into the condensation box to be cooled and crystallized. The heat exchanger exchanges heat, the hot air is introduced into the heating pipeline to heat the battery box body, and the aqueous solution enters the filter box to separate and convey the crystallized sodium acetate to the drying box to be dried. The interior of the battery box body is heated by the heat obtained by crystallizing the aqueous solution of sodium acetate, so that the battery can be charged and discharged normally, the fire accidents are avoided, and a tramcar can run more safely.

The invention discloses low-temperature compensation method and device based on a battery. The method includes the steps that the surface temperature value of the battery is acquired; whether the surface temperature value of the battery is lower than a first temperature threshold value or not is judged; if the surface temperature value of the battery is lower than the first temperature threshold value, a switching circuit controls a valve arranged on a spontaneous heating module to be switched on, air enters the spontaneous heating module, makes contact with a spontaneous heating material in the spontaneous heating module, and then release heat to heat the battery. In this way, the battery can be heated in the extreme low-temperature environment, and therefore the battery can be normally charged and discharged in the extreme low-temperature environment.

The invention provides a track energy feedback system and a control method thereof. The track energy feedback system comprises a monitoring device and a first energy storage module and a second energystorage module which are connected with the monitoring device. The method comprises the following steps: a monitoring device obtaining operation state information of the first energy storage module;judging whether the first energy storage module fails or not according to the operation state information; and if the first energy storage module fails, controlling the second energy storage module toperform charging or discharging compensation. The invention provides a redundant standby energy storage module, which carries out charging and discharging compensation when a conventional energy storage module fails, so that the power supply quality and the power supply reliability are greatly improved, and meanwhile, the utilization rate of an energy storage system is improved.

The invention relates to the field of a secondary battery and particularly provides electrolyte, a preparation method of the electrolyte, a lithium ion battery, a preparation method of the lithium ionbattery and electric equipment. The electrolyte comprises lithium salt and solvent, wherein the lithium salt comprises mixture of LiBF4 and LiFSI, and the solvent comprises mixture of sulfolane, gamma-butyrolactone, ethyl acetate and dimethyl carbonate. The electrolyte is advantaged in that the charging capacity of the lithium ion battery at -40 DEG C can reach 65% or above of the nominal capacity, the lithium ion battery can still continuously discharge at the rate of 1C at the ultralow temperature of-65 DEG C, the discharge capacity is 60% or above of the normal temperature capacity, and continuous high-rate pulse discharge can be carried out at -43 DEG C.

The invention relates to the technical field of communication base stations, and discloses a standby storage battery anti-theft protection device for a 5G communication base station. The device comprises a storage battery cabin, the interior of the storage battery cabin is movably connected with a storage battery shell, the front and back surfaces of the top end of the storage battery shell are respectively fixedly connected with a lead column, the outer side of each lead column is movably connected with a connector, an electrode is movably connected into the storage battery shell, electrolyteis contained in the storage battery shell, a fixed magnetic block is fixedly connected to the bottom end of the connector, and an inner shell is fixedly connected to the top end of the interior of the storage battery shell. A power spring pulls a piston to move towards one side of the inner shell, so that negative pressure is formed on the other side of the inner shell, and a liquid suction pipeconnected with a hole formed in the bottom end of the inner shell sucks electrolyte upwards at the bottom end of the storage battery shell into one side of the interior of the inner shell, so that theelectrolyte at the bottom end of the storage battery shell is far away from the electrode, electrode vulcanization is avoided, the service life of the battery is prolonged, the construction cost forconstructing a communication base station is reduced, and the battery is prevented from being scrapped due to vulcanization.

The present invention provides a single secondary battery formation method. According to the single secondary battery formation method, a plurality of single secondary batteries requiring formation are connected in parallel to form a discharged battery module, a plurality of single secondary batteries requiring formation are connected in parallel to form a rechargeable battery module, the voltage difference exists between the discharged battery module and the rechargeable battery module, the discharged battery module and the rechargeable battery module are connected in parallel to form a charging-discharging loop after the discharged battery module and a voltage increasing energy storage batter module are connected in series, the voltage increasing energy storage batter module is connected with a charging circuit capable of maintaining the stable voltage of the voltage increasing energy storage batter module, and when the single secondary batteries in the discharged battery module perform formation discharging, the single secondary batteries in the discharged battery module and the voltage increasing energy storage batter module always being at the voltage-stabilizing state co-perform the charging on the single secondary batteries in the rechargeable battery module so as to complete the charging formation of the single secondary batteries in the rechargeable battery module. The single secondary battery formation method has characteristics of effective energy source utilization, single battery batch formation achieving, and formation efficiency increasing.