42 results about "Power battery" patented technology

The invention relates to an SOC and SOT combined state estimation method based on a power battery electric-thermal coupling model, and belongs to the technical field of battery management. The methodcomprises the steps of selecting a to-be-measured power battery, building the electric-thermal model of the power battery, and determining parameters needed for estimating the SOC and the SOT of the power battery; under different temperatures, conducting trickling charging-discharging experiments and HPPC experiments on the measured power battery, building a database of equivalent circuit model parameters relevant to the temperature and the SOC under a charging and discharging condition, and simulating field test working conditions under different road conditions to build the database; conducting parameter identification to obtain characteristic parameters of the electric-thermal model, and obtaining the quantitative relation between the equivalent circuit model parameters and the temperature and the SOC under the charging and discharging condition. By means of the SOC and SOT combined state estimation method based on the power battery electric-thermal coupling model, the model is combined with a PF algorithm and the quantitative relation of the equivalent circuit model parameters relevant to the temperature and the SOC under the charging and discharging condition of the power battery to achieve the SOC and SOT combined state estimation of the power battery.

The invention discloses a power battery thermal management system with functions of efficient heat dissipation and efficient heating. The power battery thermal management system comprises a power battery case and a thermal management system, wherein a plurality of battery monomers are adjacently aligned to form a battery pack placed inside a battery case housing, a composite phase change material plate is sandwiched between the gap of the adjacent batteries and the surface of the outermost side battery in the battery pack width direction, the composite phase change material plates and thermal pipes are combined to form composite phase change material thermal pipe coupling components, the composite phase change material thermal pipe coupling components are additionally arranged on both sides of the battery pack, the thermal pipes extends from the through holes on the battery module housing, the extending ends are connected to heating devices and heat dissipation fans, and a programmable automatic temperature regulator treats the signal from a temperature sensor by programming so as to determine whether the fans and the heating devices are started. The power battery thermal management system of the present invention has advantages of simple and firm whole structure, high efficiency, stable operating, and the like. In addition, the battery pack can be subjected to direct, unified and uniform cooling and heating, such that the battery can work at the appropriate temperature range, and the electric vehicle battery thermal management system is improved.

The invention relates to the technical field of power batteries, in particular to a battery module. The battery module comprises a module framework and a battery pack which is arranged in the modularframework and formed by arranging single batteries and further comprises a temperature adjusting component for heating and/or cooling the battery pack; and an installation hole is formed in the bottomof the module framework, the bottom of the battery pack is exposed in the installation hole, and the temperature adjusting component is arranged in the installation hole and arranged on the bottom face of the battery pack in an attached mode. Due to the fact that the installation hole is formed in the bottom of the module framework, technical staff can directly arrange the temperature adjusting component in the installation hole in the attached mode; due to the fact that the module framework can support the battery pack, the technical staff do not need to arrange a bottom plate forming complete closure on the overall bottom face of the battery module; and due to the fact that the temperature adjusting component directly makes contact with the bottom of the battery pack, the heat conducting loss is reduced, assembly parts of the overall battery module are reduced, and therefore the battery module is lighter and good in heating or cooling effect.

The invention discloses a temperature pre-regulation system and method of a power battery pack and a thermal management system control method, and relates to the technical field of power batteries. The temperature pre-regulation control system comprises a battery pack, a thermal management system, an automobile electricity utilization load and a control system, wherein the control system comprisesa controller, an acquisition module and an instruction module; the acquisition module acquires battery pack parameter information, compares the battery pack parameter information with a preset parameter value in the controller, and controls the automobile electricity utilization load and the thermal management system through the instruction module to realize battery pack temperature pre-regulation. According to the invention, the battery pack can work in a relatively large temperature range, responses can be made in time for various problems of the battery pack, and especially when the discharge current is relatively large and the temperature rise of the battery is delayed, the flow of the cooling liquid is pre-adjusted, so that the uncontrollable condition of the battery is avoided; andmeanwhile, the controller has the functions of continuously learning and optimizing control parameters, and can carry out continuous adjustment according to the driving habit of a driver and the gradual aging of the battery.

The invention discloses a method for detecting an inner connecting resistor of a power battery pack. The method includes the following steps that (1) the alternating current inner resistance Zi of each battery cell is tested before battery modules are assembled; (2) the alternating current inner resistance Zm of each battery module is tested after the battery modules are assembled and before the battery pack is assembled, and the inner connecting resistor comprehensive value Rci of each battery module is calculated through the Zi and the Zm; (3) constant-current discharge is conducted on the power battery pack, the direct current resistance Di of each battery module and the direct current resistance Dp of the battery pack are calculated, and the connecting resistor comprehensive value Rco between the modules is calculated through the Di and the Dp; (4) the inner connecting resistor comprehensive value Rc of the battery pack is calculated through the formula Rc=Rci+Rco; (5) the inner connecting resistor of the power battery pack is evaluated through the Rc. According to the method for detecting the inner connecting resistor of the power battery pack, the structure of the battery pack does not need to be damaged, the Rc can be calculated effectively and conveniently, and therefore support is provided for the connecting resistor design of the battery pack and the electrical property and health condition judgment.

The invention discloses a high-voltage loop control device and method for an electric automobile, and belongs to the field of a new energy automobile. The control device comprises a temperature monitoring module, an electric current monitoring module and a control module. Through monitoring the real-time temperature of each of temperature monitoring points in a high-voltage loop, because when the automobile normally travels, a long-time overload current cannot occur in the high-voltage loop circuit, the temperature of each of the temperature monitoring points can be maintained within a set temperature range; when the real-time temperature of any of the temperature monitoring points is higher than the corresponding preset temperature, the situation that the current temperature monitoring point is abnormal is indicated; besides, through monitoring the electric current of a DC bus, when the real-time electric current of the DC bus exceeds a set electric current, the high-voltage loop can be damaged, so that if the output power of a power battery pack is reduced immediately or the high-voltage loop is cut off, the situation that the structure of the high-voltage loop is burn up can be avoided; and during design, a reserved design margin is reduced, and the design cost and the design difficulty are reduced.

The invention discloses an off-line battery replacement method and system of a battery replacement cabinet, a terminal and a storage medium. The method comprises the steps: receiving a Bluetooth connection request initiated by a user terminal when the battery replacement cabinet is detected to be in an off-line state; when an order sent by the user terminal through Bluetooth connection is received, opening an idle battery compartment, and prompting to place a to-be-replaced battery; obtaining a first ID of the to-be-replaced battery placed in the idle battery compartment, and judging whether the first ID is consistent with a second ID in the order; and if so, opening the full-power battery compartment, and prompting to take out the full-power battery in the full-power battery compartment. By means of the mode, when the battery replacement cabinet cannot be connected to the network or disconnected from the network, the Bluetooth module of the cabinet body is connected with the user terminal for data communication so as to achieve off-line battery replacement, normal work of the battery replacement cabinet system is not affected, the battery utilization rate can be increased, the operation income can be increased too, verification is performed through the server, and the legality of battery replacement operation is ensured.

The present invention discloses a flexibly-packaged ternary power battery and a preparation method thereof, and a positive pole piece of the battery, and belongs to the technical field of batteries and preparation methods. The flexibly-packaged ternary power battery comprises a positive pole piece, a negative pole piece, a diaphragm, an electrolyte and a battery shell, wherein the positive pole piece, the negative pole piece and the diaphragm form a diaphragm/negative pole/diaphragm/positive pole lamination type structure battery core; a current collector of the positive pole piece of the battery comprises a first coating area, a second coating area and a connecting area; the first coating area and the second coating area are connected through the connecting area; and the length of the connecting area is smaller than the lengths of the first coating area and the second coating area, and front and back surfaces of the first coating area and the second coating area are provided with a positive pole material layer separately. By adoption of the technical solution of the present invention, on the basis of guaranteeing a large capacity, the safety performance of a lithium ion battery can be remarkably improved, thereby meeting usage requirements of a new energy automobile.

The invention provides a power battery wiring harness mounting bracket. The power battery wiring harness mounting bracket comprises a bracket body and a first clamping part arranged on the bracket body, wherein the first clamping part comprises first clamping arms which are arranged in a pair and form a main containing cavity; the power battery wiring harness mounting bracket further comprises a second clamping part, wherein the second clamping part comprises two second clamping arms extending from free ends of the two first clamping arms to the inner portion of the main containing cavity; thepower battery wiring harness mounting bracket further comprises a supporting part arranged on the bracket body; a wiring harness of a small wire diameter can be clamped by the second clamping arms and the supporting part, and a wiring harness of a large wire diameter can be clamped by the first clamping arms and the supporting part. The power battery wiring harness mounting bracket has the advantages that wiring harnesses of different wire diameters can be clamped conveniently, and the use is convenient.

The invention provides an air conditioning system of a vehicle. The vehicle comprises a power battery and a vehicle controller. The air conditioning system comprises an air conditioner, a heater and a controller. The air conditioner is used for producing cool air; the heater is used for producing warm air; the controller is connected with the air conditioner, the heater, the power battery and the vehicle controller, and used for judging whether the air conditioning system meets cooling/heating start conditions when the controller receives a signal from a switch, sending a cooling/heating start request signal to the vehicle controller if the air conditioning system meets cooling/heating start conditions, and controlling the air conditioner/the heater to be started to perform cooling/heating when the controller receives a cooling/heating start permissive signal sent by the vehicle controller. The air conditioning system has the advantages of simple structure and easy communication. The invention also provides the vehicle having the air conditioning system and a control method of the air conditioning system.

The invention discloses a charging demand calculation method for an electric automobile. The method includes the following steps: 1) describing a changing condition of a state of charge of a power battery of the electric automobile during a one-day trip process of a user through a Markov chain; 2) considering the influence of a time-consuming coefficient corresponding to a traffic index on the driving time and the probability of the trip time of the electric automobile at each time period corresponding to each of destinations during the trip process of the user, and determining a distributioncondition of the charging demand at each time of one day; and 3) obtaining time and spatial distribution of the charging demand of the electric automobile by using a Monte Carlo simulation method. Themethod considers the influence of the traffic time-consuming coefficient on the driving process of the electric automobile, and can more accurately reflect the spatial-temporal distribution of the charging demand.

The invention discloses a battery temperature difference self-adaption threshold value determining method and system. The method comprises the steps of dividing a vehicle state into a charging state, an operation state and a standing state according to the data uploaded by an electric vehicle, calculating the time interval between the first data uploading time of the vehicle and the current time, and if the time interval is less than or equal to three months, determining that the temperature difference threshold value is a threshold value specified by an enterprise when the vehicle leaves a factory, if the time interval is longer than three months, extracting the temperature of the power battery according to different vehicle states, and constructing a power battery temperature database in charging, operation and standing states, extracting temperature difference values to construct a power battery temperature difference database, and determining the window length of the sliding window based on temperature difference threshold stability, and determining temperature difference threshold values in different states according to the window length of the sliding window based on the Pauta criterion. The invention also provides a battery temperature difference self-adaption threshold value determining system. The threshold value is determined for the power battery temperature difference based on different states of the vehicle, and the driving safety is improved.

Embodiments of the invention provide a shunting locomotive control method and a shunting locomotive. The method comprises the following steps: acquiring the working state of the shunting locomotive, wherein the working state is specifically one selected from a group consisting of a waiting-for-working state, a light locomotive running state and a shunting state; if the working state is the waiting-for-working state or the light locomotive running state, controlling the shunting locomotive to enter the mode of power supply via a power battery, wherein in the mode of power supply via the power battery, the power battery supplies power to the shunting locomotive; and if the working state is the shunting state, controlling the shunting locomotive to enter the mode of power supply via a dieselengine, wherein in the mode of power supply via the diesel engine, the diesel engine supplies power to the shunting locomotive. Therefore, the method overcomes the problem of large current supply lossof the diesel engine when the shunting locomotive is in the waiting-for-working state and the light locomotive running state, solves the problem that the power battery has large capacity and large size, and reduces requirements on the diesel engine.

The invention discloses an improved separating device for a power battery module for a vehicle. The improved separating device comprises a bearing plate, a rack, a first air cylinder, a second air cylinder, a dismounting device, a first conveying device, a second conveying device and a crushing device, wherein the second conveying device is pivoted on the rack through a first pivot; the first air cylinder is used for driving the second conveying device to rotate around the first pivot; the second conveying device is pivoted with a single power battery receiving plate through a second pivot; the second air cylinder is used for driving the single power battery receiving plate to rotate around the second pivot; a blowing device is arranged on the single power battery receiving plate; the dismounting device mainly comprises a parallel frame fixedly arranged on the rack, a sliding sleeve movably sleeved on the parallel frame, a screw-nut pair connected to the sliding sleeve, and a milling cutter assembly connected to the screw-nut pair. By using the improved separating device, the work efficiency and mechanical degree for power battery module separation can be remarkably improved, the safety of operating staff can be sufficiently ensured, and the harmless dismounting of the power battery can be better realized.

The invention provides a correlation-based power battery pack fault diagnosis method and system. The correlation-based power battery pack fault diagnosis method comprises the following steps: acquiring data associated with parameters meeting correlation requirements between a target power battery and a reference power battery in a power battery pack; calculating the true values of the parameters meeting the correlation requirements based on the data; calculating the current parameter prediction value of the target power battery according to the historical parameter true values of the target power battery and the reference power battery and the current parameter true value of the reference power battery by using a correlation-based parameter prediction algorithm; and according to the real value and the predicted value of the parameter, determining whether a short-circuit fault occurs in the target power battery at present, and performing early warning when the fault occurs. According to the invention, battery abnormity can be accurately measured under different battery states and measurement noise interference, and online battery pack short-circuit fault diagnosis is carried out.

The invention discloses a power battery box and a vehicle with the same. The power battery box is installed beneath a vehicle floor and comprises an upper box body and a lower box body, the upper box body and the lower box body are arranged in a buckled mode so as to limit a battery installation space used for installing a power battery between the upper box body and the lower box body, and a sealing pad is arranged between the upper box body and the lower box body. According to the power battery box, water or dust can be prevented from entering the power battery box, and therefore the power battery can be in a safe and stable working environment.

The invention provides a preparation method of a pole group of a high-capacity lithium-ion power battery. The preparation method comprises the step of manufacturing a pole piece, wherein the pole piece is produced by the following steps: coating the pole piece of the battery, grinding, slitting into strips, punching the positive pole piece and the negative pole piece of the slit strip according to the preset sizes respectively, carrying out corona heat sealing with diaphragms respectively to form different pole piece-diaphragm composite bodies, and then manufacturing the laminated pole group or the winding type pole group by use of different pole piece-diaphragm composite bodies. According to the prepared high-capacity lithium-ion power battery, the problems that the diaphragm and the pole piece inside the battery are dislocated, the diaphragm is folded, the performance and the safety of the battery are reduced due to vibration, bumping and long-term use of the high-capacity laminated battery are solved, and the stability and the safety of the battery are effectively improved.

The embodiment of the invention provides a power battery top cover assembly, a power battery and a battery module, wherein the power battery top cover assembly comprises a top cover sheet and a firstelectrode terminal, and the first electrode terminal comprises a first conductive plate, a first electrode post and a first terminal plate; Wherein the first pole has a first portion and a second portion, the connecting surface between the first portion and the second portion is at a non-zero included angle with the top cover sheet, and the second portion extends upwardly and through the top coversheet; The first conductive plate is connected with the first part; The first terminal block is connected to the second part. A power battery top cover assembly, since the connection surface betweenthe first portion and the second portion is at a non-zero included angle with the top cover sheet, Therefore, the tensile stress exerted by the sealing ring on the lower end of the first pole does notact perpendicularly on the connecting surface between the first portion and the second portion, i.e., the tensile stress acting perpendicularly on the connecting surface is reduced, thereby reducingthe risk of cracking or breaking of the first pole at the connecting surface.

The invention provides an integrated electric car power battery assembly which comprises a plurality of columnar lithium battery units and an installation assembly for installing all the lithium battery units to form a power battery set. The installation assembly comprises an installation bottom box, a plurality of battery supports and fixing pieces. Every two battery supports form one group. The lithium battery units are fixed and embedded between every two battery supports. The battery supports are fixedly arranged on the installation bottom box, and the axis direction of the lithium battery units is parallel to the length direction of the battery bottom box. The battery supports are arranged between the two fixing pieces. The two fixing pieces are fixedly connected through a connecting screw, and the battery supports and the lithium battery units form the whole power battery set through the fixing pieces. The lithium battery units of an electric car can be integrated into the battery set, the battery set is easily installed, the installation difficulty and maintenance difficulty of the integrated lithium battery set can be effectively reduced, use cost is reduced, and a good protection effect can be achieved for the lithium battery units.

The invention relates to the technical field of battery shells, and discloses a new energy automobile power battery shell mounting method. An upper cover, a base, a connecting block and a clamping rodare included, movable plates I are fixedly connected to the four sides of the upper cover, movable plates II are fixedly connected to the four sides of the base, and limiting rods are uniformly and fixedly connected to the bottoms of the movable plates I; the surfaces of the limiting rods are provided with external threads, the outer rings of the limiting rods are in threaded connection with clamping sleeves, and inner cavities of the clamping sleeves are provided with internal threads matched with the external threads. According to the new energy automobile power battery shell mounting method, through the arrangement of a limiting groove and a limiting block, when a user needs to take out a battery in the shell, the user extrudes a metal sheet to enable the limiting block to be clamped with the limiting groove, the limiting rods can move to the positions above a fixing groove under the action of resilience force of first springs, and the upper cover and the base can be rapidly separated; the time of the user is saved, and the working efficiency of the user is improved.

The invention provides a green and environment-friendly power battery aluminum shell cleaning device. The cleaning device comprises a first cleaning case, a second cleaning case, a third cleaning case, a first recycling treatment device, a second recycling treatment device and cylindrical mesh baskets, wherein the first cleaning case, the second cleaning case and the third cleaning case are sequentially connected and each internally provided with a first mesh basket rolling device used for rolling the corresponding cylindrical mesh basket; an ultrasonic generator is arranged at the bottom of the first cleaning case, the side wall of the second cleaning case and the side wall of the third cleaning case are each provided with a spraying device, and a spray head of each spraying device faces the corresponding first mesh basket rolling device; and the first recycling treatment device is connected with the third cleaning case and the second cleaning case separately, and the second recycling treatment device is connected with the second cleaning case and the first cleaning case separately. According to the cleaning device, secondary cleaning liquid and three-time cleaning liquid are recycled and treated for cycle use, so that the water resource is saved, the discharge amount of waste liquid is effectively reduced, and more environmental friendliness is achieved.

The invention relates to an online diagnosis method for a nonlinear decline aging mode of a lithium ion battery. According to the method, only voltage and current information in the battery charging process is adopted, and the aging mode of nonlinear recession of the battery is accurately evaluated by obtaining the evolution track of the average voltage and capacity of the battery in the aging process. The diagnosis method does not need to adopt a specific charging current, is simple and easy to implement, has high reliability, can be directly used on the electric vehicle, and is suitable for online aging mode identification of the power battery of the electric vehicle.

The invention discloses a battery cooling device, and belongs to the technical field of power batteries. The battery cooling device comprises a base plate, a cover plate arranged on the base plate, acooling channel arranged between the base plate and the cover plate and a fixation mechanism arranged in the middle as well as the periphery of the base plate; a liquid inlet tube and a liquid outlettube are arranged in the two ends of the cooling channel respectively; and the base plate and cover plate are connected via the fixation mechanism. The battery cooling device is simple in structure and easy to realize and reduces the production cost; and the fixation mechanism arranged in the middle as well as the periphery of the base plate, namely, in the whole base plate, the fixed connection intensity is improved, the middle portion of the base plate is fixedly connected to the middle portion of the cover plate, the stability and reliability are higher, budging tends not to occur in the middle position even the base plate is large, reduction the contact area with a battery pack due to budging is reduced, and the battery pack cooling effect is ensured.