1110 results about "Lithium ion battery pack" patented technology

A vehicle includes a body adapted to carry passengers or cargo, an electric engine / motor, and a temperature-controlled battery configuration. The battery configuration includes a casing, and a plurality of alternating Lithium-ion cell packs and spacers defining vertical channels, the spacers supporting the cell packs in a hanging manner in the casing. The casing is flooded with a thermally-conductive electrically-insulating fluid flowing from the inlet under the cell packs, upwardly across the cell packs and out an outlet to a heat exchanger for controlling a temperature of the cell packs. A fluid pump connected to the engine / motor and a heat exchanger pumps the liquid through the system. A controller is provided for controlling the pump and fluid flow to control a temperature of the battery configuration to maintain the temperature in a desired temperature range.

A lithium-ion battery includes a cathode that includes an active cathode material. The active cathode material includes a cathode mixture that includes a lithium cobaltate and a manganate spinel a manganate spinel represented by an empirical formula of Li(1+x1)(Mn1−y1A′y2)2−x2Oz1. The lithium cobaltate and the manganate spinel are in a weight ratio of lithium cobaltate: manganate spinel between about 0.95:0.05 to about 0.55:0.45. A lithium-ion battery pack employs a cathode that includes an active cathode material as described above. A method of forming a lithium-ion battery includes the steps of forming an active cathode material as described above; forming a cathode electrode with the active cathode material; and forming an anode electrode in electrical contact with the cathode via an electrolyte.

The invention provides a backup lithium ion battery pack management method and a management system thereof. The method comprises the following steps: real-time data sampling, running state identification and electric quantity estimation, intelligent charging management and discharging management, self-discharge power consumption management, heating management, alarm and security protection. The cell management system comprises a power supply unit, a data acquisition unit, a storage unit, a micro control unit (MCU), a state indication unit, an equalization unit, a heating unit, a switch unit and a communication unit. The method and the system are aimed at seamlessly connecting a lithium ion battery to various present backup power supply systems, and according to working condition characteristics of various backup power supplies, a lithium ion battery pack always maintains sufficient energy in a long time energy storage reserve supply period and maintains an enough long reserve supply time in reserve supply output.

A system and method for improving cycle lifetimes for a lithium-ion battery pack, particularly for adapting to a dynamic use profile for a user. A battery cell pack charging system, including a charger and a controller, for charging a lithium-ion battery cell pack, the battery cell pack charging system has a circuit for charging the battery cell pack using an adjustable charging system including an adjustable charge profile to charge the battery cell pack wherein the adjustable charge profile includes: an operational parameter identifying a next operation post-charge performance characteristic for the battery cell pack wherein a controller determines a next cycle plan for the battery cell pack that provides the performance characteristic while concurrently enhancing an attribute of the battery cell pack and wherein the attribute is measured over a plurality of applied cycles; and one or more charging stages to produce an energy ending point for the plan; wherein the adjustable charge plan is implemented by the charger in anticipation of a post-charging operation associated with the operational parameter.

A cooling plate for a battery pack with a plurality of battery cells is provided. The cooling plate includes a cooling fin with a substantially planar surface and a perimeter. The cooling plate includes a frame abutting the cooling fin and forming a seal with the cooling fin adjacent the perimeter of the same. The frame and the cooling fin define at least one fluid inlet, at least one fluid outlet, and a flow channel therebetween. The at least one fluid inlet and the at least one fluid outlet are disposed through the seal and are in fluid communication with the flow channel. The flow channel is disposed adjacent the perimeter and in heat transfer communication with the substantially planar surface of the cooling fin. A battery pack with the cooling plate, and a method for controlling a temperature of the battery pack, are also provided.

A method and apparatus for providing portable ground power for aircraft. A ground power unit includes a lithium ion cell battery assembly and a standard three-pin aircraft ground power connector integrated into a single unit and packaged inside a ruggedized plastic housing with a carry handle, thereby eliminating the heavy and bulky power cables between the battery and connector. A battery management unit sets charge / discharge limits and provides monitoring of state of charge, health, and function. A charging connector and charging circuitry with user-selectable regulated charging limits allows simultaneous charging and discharging operations and connection into aircraft auxiliary circuits. A ganging station is provided to electrically combine the outputs of several ground power units in parallel for starting larger aircraft.

The invention discloses a method and system for estimating remaining available capacity of a lithium ion power battery pack. The method comprises the following steps: recording the current value in the charging process and the time used by charging, and calculating the total available capacity of the lithium ion battery at the starting time of discharging, thereby obtaining the total available capacity A of the lithium ion battery; recording the open-circuit voltage and the voltage drop delta V in the discharging process, selecting the curvilinear function used by calculating the remaining available capacity percentage through the voltage drop delta V, and obtaining the remaining available capacity percentage a of the lithium ion battery; obtaining the service efficiency of the remaining available capacity SOC of the battery at the current temperature by utilizing the relation between temperature and remaining available SOC; and adding A*a* of all the batteries to obtain the remaining available capacity of the lithium ion battery pack. The system for realizing the method comprises a voltage, current and temperature monitoring module for monitoring the battery pack information, the monitoring module feeds the monitored information back to the MCU, and the MCU outputs the estimated remaining available capacity of the lithium ion power battery.

A handheld device for jump starting a vehicle engine includes a rechargeable lithium ion battery pack and a microcontroller. The lithium ion battery is coupled to a power output port of the device through a FET smart switch actuated by the microcontroller. A vehicle battery isolation sensor connected in circuit with positive and negative polarity outputs detects the presence of a vehicle battery connected between the positive and negative polarity outputs. A reverse polarity sensor connected in circuit with the positive and negative polarity outputs detects the polarity of a vehicle battery connected between the positive and negative polarity outputs, such that the microcontroller will enable power to be delivered from the lithium ion power pack to the output port only when a good battery is connected to the output port and only when the battery is connected with proper polarity of positive and negative terminals.

The invention discloses a method and an apparatus for suppressing and preventing thermal runway of a lithium ion battery. A liquid refrigerant is adopted to perform spray refrigerating and fire extinguishing on a fault lithium ion battery; when a single battery achieves a certain temperature, a spraying apparatus is opened; by calculating vaporization latent heat amount of the liquid refrigerant, the vaporization latent heat amount of the liquid refrigerant is 0.1-10 times of the thermal runway heating amount of the single battery, and the spraying way is continuous spraying or interrupted spraying; the invention also discloses the apparatus; a storage tank is arranged in a battery pack shell; the liquid refrigerant is put in the storage tank; the storage tank is connected with a pipeline through a general control valve; a plurality of nozzles arranged above the lithium ion battery pack are arranged on the pipeline; and the battery pack shell is provided with one or more pressure release valve. Compared with the prior art, the problems of single function of the safety protection way, insufficient stability, safety and reliability and low efficiency of the lithium ion battery in the prior art are effectively overcome.

The invention relates to a cooling fire extinguishing device specific to stored lithium ion battery thermal runaway. The cooling fire extinguishing device is composed of a control part, a water supply device and a liquid nitrogen supply device. The control part is composed of infrared temperature detectors (1), a temperature judgment program (10), a control valve (11), water control valves (2), liquid nitrogen control valves (9) and an electrical circuit connected with the infrared temperature detectors (1), the temperature judgment program (10), the control valve (11), the water control valves (2) and the liquid nitrogen control valves (9). The water supply device is composed of a water storage tank (5), a high-pressure pump (4), a water supply pipe network (12) and fine water mist spray nozzles (3). The liquid nitrogen supply device is composed of a liquid nitrogen tank (6), a low-temperature pump (7), a liquid nitrogen supply pipe network (13) and liquid nitrogen spray nozzles (8). The cooling fire extinguishing device is mainly suitable for storage places of lithium ion battery packs and can provide safety insurance for application, storage and transportation of lithium ion batteries. The fire extinguishing device can conduct targeted cooling in the initial stage of lithium ion battery pack thermal runaway, and meanwhile, timely fire extinguishment can be conducted after the battery pack is integrally on fire.

The invention discloses a system for partitioned heat management based on a lithium ion battery pack. The system comprises a box body and a battery pack, wherein the battery pack is arranged in the box body and consists of a plurality of single square lithium ion batteries which are vertically arranged in parallel; a liquid inlet pipe with a flat pipe cross section is arranged at the outer side of a positive electrode lug of each single square lithium ion battery above the battery pack; a liquid outlet pipe with a flat pipe cross section is arranged at the outer side of a negative electrode lug of each single square lithium ion battery above the battery pack. The system has the advantages that the structure is simple, and the cost is low; by adopting a partitioned heat management method, a phase change material and liquid cooling are combined, the active and passive types are combined, the heat radiation, heating and heat insulation functions are realized, the accurate control on temperature in the square lithium ion battery pack is realized, the better heat radiation effect is realized, and the heat safety of the battery pack is guaranteed; the safety of the battery is effectively improved, and the service life of the battery is prolonged; the long-time efficient running of the battery heat management system is guaranteed, and the economy of the heat management system is improved.

The invention provides a fuel cell and lithium ion battery hybrid system, which comprises a fuel cell subsystem, a lithium ion battery subsystem, a charge control subsystem, an intelligent hybrid power management system, a motor and a motor control system. A fuel cell serves as a main operation power source while a lithium ion battery serves as an auxiliary power source. The problems that the fuel cell of the pure fuel cell automobile is short in service life and the energy is unrecyclable can be solved, and the problems of long charge time, potential burning and explosion in continuous high-current discharge, attenuation and self discharge of the pure lithium ion battery electric vehicle are also solved. Service lives of the fuel cell and the lithium ion battery are effectively prolonged, the cost of the power system is reduced, reliability and safety are improved, energy recovery is realized, and accordingly the fuel cell and lithium ion battery hybrid system is an excellent solution to the power source problem of electric vehicles.

The invention relates to an explosion-proof flame-retardant lithium-ion battery safety box comprising a lithium-ion battery pack and a sealed box; the sealed box comprises a box body and a top cover; the top cover and the box body are connected in a seal way; the lithium-ion battery pack is arranged in the box body; a radiating fin, a positive pole conductive terminal and a negative pole conductive terminal are arranged on the top cover; and a gas valve which is used for vacuumizing and is filled with inert gas is arranged on the top cover. The invention provides the explosion-proof flame-retardant lithium-ion battery safety box which can effectively prevent the explosion of single batteries or the battery pack, and greatly improve the safety performance.

An emergency system for a vehicle integrates many disparate equipment into single housing, including the power supply for the equipment. In one embodiment of the invention, the emergency system is a light bar. The light bar houses a power source comprising solar cell panels, a Lithium-Ion battery pack and a connection to an external supply such as the vehicle's electrical power. Energy for operating the light bar is provided by one or more of the power sources, depending on operating conditions of the light bar and each of the power sources.

The invention provides an evaluation method of the consistency of a lithium ion battery pack for an electric vehicle, specifically comprising the following steps: A, connecting a battery pack formed by connecting monomer batteries in series with the battery management system of the electric vehicle; B, controlling the battery pack to discharge by the battery management system, and collecting and recording the voltage and the temperature of the monomer batteries as well as the SOC value of the battery pack by the battery management system; and C, in the discharging process, calculating the standard deviation delta of the voltage of each monomer battery once every 10% of SOC; according to the value of the standard deviation delta, evaluating the consistency of the battery pack; when the standard deviation delta is less than a preset value, representing that the battery pack has good consistency, otherwise, representing that the battery pack has poor consistency. The computational formula of the standard deviation delta is show in the specification. The evaluation method has the characteristics of simple operation, convenient processing and accurate judgement, and is suitable for evaluating the consistency of the battery pack of the electric vehicle.

Digital musical footwear is disclosed having hidden compartments which house a thin integrated multi-plane electronic circuit board assembly (2) and a rechargeable lithium ion battery pack. A transmitter antenna is attached to a hand held device such as a smart phone which antenna sends wireless short wave sound signals to a receiving antenna part of the circuit board assembly. Multiple mini-speakers (6, 7) are footwear mounted to play the music. Bluetooth® version 4.0 wireless protocol technology is employed in the circuit board assembly. The circuit board can be flat and hidden in a recess of a heel or curved and hidden in a wall recess of the footwear as can the battery pack. Advanced lithium ion batteries such as silicon wafer or silicon core-shell nanowire batteries may be used to reduce battery weight. Flexible flat speakers (65) such as the FleXpeaker® may also be used to further reduce weight.

The invention relates to the field of lithium batteries and discloses a formation method of a soft-packed lithium ion battery. The formation method comprises the following steps: charging to be in a preset non-full state by ultra-low current and standing; continuously charging till to be in a full state by low current and standing; carrying out vacuum and heat sealing on a shell and remaining a first air bag; discharging the lithium ion battery to be in a discharging cut-off voltage state; continuously charging till to be in a charging cut-off voltage state, charging till to be in a charging cut-off current state by constant voltage and standing; discharging till to be in a discharging cut-off voltage state; charging till to be in the charging cut-off voltage state by constant current, charging till the current is reduced to the charging cut-off current by the constant voltage and standing; vacuumizing, carrying out vacuum heat sealing on the shell, and shearing the first air bag and a second air bag to obtain the lithium ion battery packed in a second sealing cavity body. The formation method is beneficial to preventing the inflation problem of the lithium ion battery in the application process.

A lithium-ion battery includes a cathode that includes an active cathode material. The active cathode material includes a cathode mixture that includes a lithium cobaltate and a manganate spinel a manganate spinel represented by an empirical formula of Li(1+x1)(Mn1−y1A′y2)2−x2Oz1 or Li(1+x1)Mn2Oz1. The lithium cobaltate and the manganate spinel are in a weight ratio of lithium cobaltate:manganate spinel between about 0.9:0.1 to about 0.6:0.4. A lithium-ion battery pack employs a cathode that includes an active cathode material as described above. A method of forming a lithium-ion battery includes the steps of forming an active cathode material as described above; forming a cathode electrode with the active cathode material; and forming an anode electrode in electrical contact with the cathode via an electrolyte.

The invention relates to a method for predicting the cycle life of a battery pack for an electric car. The method comprises the following steps: step I, carrying out standard capacity test on the battery pack at normal temperature, and recording a real standard capacity of the battery pack; step II, carrying out dynamic stress working condition circulating test on the battery pack, returning to the step I after multiple times of working condition circulating test is ended, recording the test times of the standard capacity, ending the circulating test at the temperature if the real capacity of the standard capacity test for continuous 4 to 6 times is less than 80 percent of the rated capacity, wherein the test times of the standard capacity indicate the cycle life of the battery pack; step III, repeating the step I and the step II, and testing the cycle life of the battery pack under multiple temperature points. According to the method, the battery pack cycle life data at the grouped time is collected, a fitted equation is obtained by virtue of data processing, and the cycle life of a lithium ion battery at present can be predicted.

The invention discloses a lithium ion battery energy balance system and an implementation method thereof, the system comprises a lithium ion battery pack, n voltage detection circuits, n DCDC converters, n main control chips, a data processing chip, a CAN communication module and a current detection circuit, the lithium ion battery pack consists of n single lithium ion batteries which are connected in series, the input end of the Kth voltage detection circuit is connected with the positive electrode and negative electrode of the kth single lithium ion battery, sampling is started when voltage detection requires conducting, the sampling value is isolated and then transmitted to the kth set of main control chips, each DCDC converter directly carries out charging and discharging to each single lithium ion battery in the lithium ion battery pack respectively through controlling the switch of an MOS pipe, simultaneously, the balanced current is adjusted through switching frequency, the lithium ion battery energy balance system and the implementation method thereof use a second-order RC model to simulate a lithium ion battery chemistry model, and uses the SOC generated by linear regression as the judging basis of lithium ion battery equalization, thereby achieving the equalization purpose.

The invention discloses an active equalization technique of a lithium battery pack. Based on booster technology and a super capacitor, the technique can be used for voltage equalization of large capacity series connected lithium battery packs in charging state. The conventional active equalization technique has the problems of low electric quantity transmission efficiency, complex controlling and the like. By combining an electric quantity transmission technique of inductor and capacitance, the active equalization technique of the invention can perform electricity quantity transmission of any two batteries in the lithium ion battery pack to achieve the aim of voltage equalization of the lithium ion battery pack, and the comprehensive efficiency can reach about 84 percent. The conventional active equalization technique is characterized by flexible specific control, high efficiency of electricity quantity transmission and the like.

The invention provides a single cell capacity estimation method in a lithium ion battery pack. The implementation of the single cell capacity estimation method in the lithium ion battery pack is basedon a charging process of the lithium ion battery pack and a discharging process of the single cell; and N battery cells in the same aging state are contained in the lithium ion battery pack. The single cell capacity estimation method in the lithium ion battery pack comprises the following steps: taking a first fully charged single cell in the lithium ion battery pack as a reference battery, and calculating an approximate Q-OCV curve QV0 according to a charging and discharging curve; calculating the approximate Q-OCV curve QVi of an i-th cell whose capacity is to be estimated according to thecharging and discharging curve of the i-th cell whose capacity is to be estimated; performing differential calculation on the QV0 and the QVi separately to obtain capacity differential curves D0 and Di, normalizing the D0 and the Di, and translating the Di to coincide with the D0; recording the approximate OCVi of the charging cut-off time (the end point value of the curve) in the Di; calculatingan approximate SOC-OCV curve S0 of the reference battery according to the curve VQ0; determining a SOCi value corresponding to the OCVi in the curve S0; and calculating the actual capacity of the i-thsingle cell according to the partial discharging capacity of the i-th single cell and the SOCi value.

The invention discloses a lithium ion battery compound module which comprises a plurality of sections of flexible packaging battery monomers (2) which are inserted into a shell (1), wherein a heat-conduction plate is sleeved on each battery monomer (2), and the battery monomers are arranged in parallel to form a battery pack body; an epoxy plate (6) is arranged at the top of the battery pack body, two rows of pole lug holes (5) are arranged on the battery pack body, a copper pole lug (3) and an aluminum pole lug (4) of each battery monomer respectively pass through the corresponding pole lug hole (5) and are fixedly and serially connected; a cover plate (10) is arranged above the epoxy plate (6), and an anode post (7) and a cathode post (9) arranged on the epoxy plate are respectively connected with the cathode of the first battery and the anode of the final battery; and a plurality of current outlet terminals (8) are arranged between the anode post (7) and the cathode post (9). The invention solves the problems that the flexible packaging lithium ion battery pack in the prior art is difficult to radiate, easy to be punctured, incapable of balancing the current, not strict in sealing, and the like and obtains the advantages of high specific energy, portability, flexible storage, and the like.

The invention discloses a power lithium-ion battery pack intelligent management system specially used for an electric automobile. The power lithium-ion battery pack intelligent management system comprises a controller, a charging module, a balancing module, a data acquisition module, an electric quantity calculating module, a data display module and a storage communication module, wherein the charging module, the balancing module, the data acquisition module, the electric quantity calculating module, the data display module and the storage communication module are respectively connected with the controller; and the data acquisition module comprises a voltage acquisition module, a current acquisition module and a temperature acquisition module. The power lithium-ion battery pack intelligent management system disclosed by the invention takes a singlechip as a control core, and energy of each lithium battery is balanced while overcharging, overdischarging, overcurrent and temperature protection and short circuit protection can be realized.

The invention discloses a single lithium ion battery SOC estimation method based on sliding window filtering. In a novel algorithm, a battery model is composed of two RC parallel circuits, one series resistor and one nonlinear voltage source, the dynamic working state in a battery is simulated through battery terminal voltage, the RC parallel circuits and a battery SOC. The single lithium ion battery SOC estimation method is based on an electrochemistry-circuit equivalent lithium ion battery combination model, the model well describes the nonlinear function relation between battery OCV and the battery SOC, and the SMO algorithm is used for solving the nonlinear problem of the model. Meanwhile, in the single lithium ion battery SOC estimation method, the SMOS algorithm and the Kalman filtering algorithm are innovatively combined to solve the problem of uncertainty of a lithium ion battery model, and the accuracy of the battery model and the reliability of a battery control system are guaranteed. At last, the battery model parameter on-line identification method provides necessary parameter values for on-line accurate estimation of the battery SOC.

An electroactive material for use in an electrochemical cell, like a lithium-ion battery, is provided. The electroactive material comprises lithium titanate oxide (LTO) and has a surface coating with a thickness of less than or equal to about 30 nm that suppresses formation of gases within the electrochemical cell. Methods for making such materials and using such materials to suppress gas formation in electrochemical cells are likewise provided.

The invention provides a lithium-ion battery pack health state assessment method. A lithium battery pack with a battery management system is charged on a charging-discharging motor, computing of the health state of a lithium-ion battery pack based on the process from charging starting to full-charging stopping is carried out, SOH is computed according to the following formula, SOH = CCal / CExp * 100%, CCal is the practical current integration capacity value of the lithium-ion battery pack from charging starting to full-charging stopping, I is charging currents, t0 is charging starting time, tn is charging stopping time, CExp is the capacity value which the lithium-ion battery pack should have from charging starting to full-charging stopping, CExp = (SOCChgF - SOCChg0) * CR, CR is the nominal capacity value of the lithium-ion battery pack, SOCChgF is the SOC value during full-charging stopping, SOCChg0 is the SOC value of the charging starting moment, the judging criterion of full-charging stopping is that lithium battery pack charging voltages reach Vreated * N, and I <= 0.1 C, wherein Vreated is the full-charging voltages of batteries in the lithium battery pack, N is the number of the batteries connected in series in the lithium battery pack, and if CCal is larger than CExp, the value is abandoned and is not used. Accordingly, the accuracy and the authenticity of SOH estimation are improved.

The invention relates to a lithium ion battery module capable of automatically adjusting interior temperatures and belongs to the field of electric vehicle-mounted power supplies. The lithium ion battery module comprises a casing, a lithium ion battery pack and a refrigeration portion, a battery cell transmits heat to heat conducting aluminum plates on two sides of the battery cell through a dustpan type aluminum case, a semiconductor refrigeration sheet leads the heat out of the heat conducting aluminum plates to a radiating plate, and cooling water runs through the inside of the radiating plate and takes away the heat. A heat insulation plate is arranged between the radiating plate and the heat conducting aluminum plates and isolates the interior of a battery from the exterior of the battery, an opening which is of same size with the refrigeration sheet is opened on the radiating plate, and the refrigeration sheet is placed in the opening for finishing refrigerating (or heating) functions. The process is automatically achieved by the fact that electron thermo bulbs installed in the heat conducting aluminum plates control an electronic control system.

A cooling plate for a battery pack with a plurality of battery cells is provided. The cooling plate includes a cooling fin with a substantially planar surface and a perimeter. The cooling plate includes a frame abutting the cooling fin and forming a seal with the cooling fin adjacent the perimeter of the same. The frame and the cooling fin define at least one fluid inlet, at least one fluid outlet, and a flow channel therebetween. The at least one fluid inlet and the at least one fluid outlet are disposed through the seal and are in fluid communication with the flow channel. The flow channel is disposed adjacent the perimeter and in heat transfer communication with the substantially planar surface of the cooling fin. A battery pack with the cooling plate, and a method for controlling a temperature of the battery pack, are also provided.

A method and system for controlling temperature in an electric vehicle battery pack such that battery pack longevity is preserved, while vehicle driving range is maximized. A controller prescribes a maximum allowable temperature in the battery pack as a function of state of charge, reflecting evidence that lithium-ion battery pack temperatures can be allowed to increase as state of charge decreases, without having a detrimental effect on battery pack life. During vehicle driving, battery pack temperature is allowed to increase with decreasing state of charge, and a cooling system is only used as necessary to maintain temperature beneath the increasing maximum level. The decreased usage of the cooling system reduces energy consumption and increases vehicle driving range. During charging operations, the cooling system must remove enough heat from the battery pack to maintain temperatures below a decreasing maximum, but this has no impact on driving range.