986 results about "Test battery" patented technology

A method of analyzing electrocardiogram (EKG) data for use in the diagnosis of heart disease, prognosis of cardiac conditions, and the monitoring of heart disease therapies is disclosed. The method utilizes a wavelet-based multifractal analysis with one or more of (1) a discrete wavelet smoothing step to remove the effects of abnormal beats; (2) “Levy flight” analysis to detect the frequency of abnormal beats known to adversely affect the multifractal (MF) analysis; and (3) MF alpha analysis, a multifractal extension of monofractal short term (ST) alpha analysis. The invention further comprises an EKG test battery comprising Levy flight anomalous beat/beat cluster screening, followed by (ST) MF alpha analysis and MF Holder analysis (when validated by the Levy flight analysis). The wavelet smoothing step can also be used to classify human EKGs by observing the effect of sequential smoothing on the MF Holder coefficient. Alternative choices to the wavelet smoothing approach to removal of abnormal beat effects include probability distribution function analysis to determine the MF Holder coefficient directly, abnormal beat ridge skeleton removal to remove the offending beats based on a direct multifractal spectrum calculation, and the calculation of various types of entropy coefficients for the EKG time series.

A virtual reality (VR)-based test battery wherein various neurobehavioral performance skills, including motor skills, sensory-perceptual skills, attention, and decision-making can be measured in human subjects. The invention can be used as a screening method within a virtual environment to provide an overall measure of general brain function relating to behavioral ability. In addition, the invention provides comprehensive VR-based neurobehavioral examinations tailored to individual subjects which can automatically self-adjust during operation in accordance with the specific purpose of the assessment, or for forms of cognitive or physical rehabilitation. According to the invention, patients with neurological and psychiatric dysfunctions can be assessed with physiologic monitoring as well as with anatomical and functional neuroimaging to non-invasively map the functional neuroanatomic correlates of VR-based test performance. In a preferred embodiment, the VR-based neurobehavioral testing system is portable allowing computerized tests to be administered in a desk-top or lap-top configuration, or via the Internet for tele-assessment of human subjects who are physically inaccessible to the test administrator. In a particularly preferred embodiment, the method of the invention is used for vocational assessment and training, wherein individual test scores are combined into a final metric useful for assessing a candidate's qualifications for employment, or certification in a particular skill.

A test battery method and system (10, 100, 200, 225) for use in assessing auditory function (e.g., the screening or diagnosis of impairments, fitting of hearing aids, etc.) is provided which performs one or more auditory tests including, for example, an acoustic reflectance test. Such an acoustic reflectance test may be a reflectance tympanometry test that includes a feedback system to control static pressure in the ear canal. Such acoustic reflectance tests may be used alone or in combination with one or more other auditory tests. Further, for example, such a battery of tests may include middle-ear muscle reflex tests in combination with one or more other auditory or hearing tests.

Methods and apparatus are disclosed for detecting solar cell defects by applying a forward-biasing electric current through a silicon solar cell or a group of interconnected solar cells for a short duration and then analyzing the resulting thermal image of each cell with an infrared (IR) camera. The invention is particularly useful in assembling solar cell arrays or modules in which large numbers of cells are to be wired together. Automated module assemblers are disclosed in which the cells (or strings of cells) are tested for defects prior to final module assembly.

The invention relates to the technical field of lithium battery parameter determination methods, in particular to a lithium battery cycle life quick testing method. The method includes the steps of step 1, determining charge state interval for cycle life quick testing according to polarization voltage characteristics of a battery sample, step 2, carrying out a battery cycle life quick test to obtain cycle life test experimental data, step 3, carrying out cycle life mathematic model deduction in partial charge interval, step 4, establishing cycle life deduction mathematic models in 0-100% charge interval, step 5, obtaining a cycle life formula of a battery in the 0-100% charge interval, and step 6, estimating the cycle life of the tested battery. The lithium battery cycle life quick testing method overcomes the defects that time for conventional testing is long, and difference between an accelerated cycle life testing method and the reality is large, and shortens design, development and testing periods of batteries.

The invention relates to a device and a method for testing health state of a battery, wherein the device comprises a main control module and the following modules that are connected with the main control module: an input module, a discharging load module, a voltage/current/temperature signal collecting module and an output module. The method comprises the steps of correcting CCA (Common Communication Adapter) and calculating the reference internal resistance R0 of the tested battery according to the testing standard, the battery type and the environmental temperature; measuring the voltage change rate DV and the current change rate DI of the measured battery by conducting and disconnecting the discharging load (recovered); calculating the practical dynamic battery resistance R which is equal to DV/DI; calculating the state of charge of battery SOH that is equal to (R-R0)/R0; and outputting the testing result or corresponding testing prompt of the health state according to the battery voltage V and SOH. According to strict verification of discharge test, the estimation precision of the testing device and the testing method can achieve within 5%, can be repeatedly tested, do not need strict conditions, have high automation degree, and can meet the practical maintenance requirements of the battery.

A method and apparatus is used to confirm the charge amount and degradation state of a battery. Various cycle test battery measurements are conducted at prescribed time intervals until the end of the battery life, and the measured values are used to generate a determination table or determination tables showing relationships between battery charge amount and degradation state. To establish the charge amount and degradation state of a subject battery, the subject battery is measured and the results compared with determination table values. The existing charge amount and the state of battery degradation are estimated in accordance with a determination table location of matching values.

The invention discloses a method for testing battery peak power, which comprises the steps of: measuring and calculating a battery multiplying power charge and discharge curve and measuring and calculating maximum allowable charge and discharge currents of batteries according to the curve. The battery peak power measured and calculated by using the method has high accuracy, a database is formed by measurement and calculation according to types of the batteries and is stored in a battery management system, the database can be directly scheduled through the battery management system during use, and power of the batteries can be fully utilized on the premise that the service life of the batteries is not influenced so that power performance of a vehicle is improved.

The invention discloses a retired power battery dismounting-free reuse screening method based on operation big data. According to the method, retired power battery boxes uncovered for inspection; the uncovered power battery boxes are screened according to appearance characteristics; battery boxes with damaged appearances are filtered out; the battery boxes are subjected to self discharging test; internal discharging battery modules are marked according to battery pack self discharging parameters of the battery boxes, and the battery boxes with internal short circuit are removed; activating treatment is performed; the battery pack capacity is tested for capacity grading; battery modules in battery packs are subjected to consistency evaluation; the grading is performed according to consistency evaluation parameters; the historical operation data is read; use record parameters of all the battery packs are counted, and a health state is evaluated; a grade threshold value is set according to an evaluation result; the power battery packs meeting the set threshold values are screened. The surplus performance of retired power batteries of an electric automobile can be fully realized.

The invention belongs to the field of electric automobile battery change and relates to a chassis type automatic electric automobile battery changing station. The chassis type automatic electric automobile battery changing station comprises a battery changing robot, a transfer machine, a charging frame and a charging machine. The battery changing robot is located on one side of the charging frame, and the charging machine is located on the other side of the charging frame. A transfer track in the advancing direction of an electric automobile is arranged between the battery changing robot and the charging frame. The transfer machine is located on the transfer track. The chassis type automatic electric passenger vehicle battery changing station can automatically take down batteries lack of electricity from an electric automobile, put in batteries full of electricity and automatically charge the batteries lack of electricity. Especially for large-scale and heavy-type batteries, the problem that the batteries can be charged but cannot be changed is solved, the batteries are protected, and a reference basis is provided for development of new energy automobile battery changing modes.

The invention discloses a battery thermal runaway trigger and released gas collecting device comprising a battery blast protective container body. A container cover on one end of the battery blast protective container body is equipped with an observation window and the other end of the battery blast protective container body is connected with a gas pressure control and acquisition system. The top of the battery blast protective container body is equipped with an anti-explosion pressure release apparatus. A battery thermal runaway trigger assembly, a battery surface temperature sensor, and an ambient temperature sensor are disposed in the battery blast protective container body. The battery surface temperature sensor is disposed on the battery thermal runaway trigger assembly. An air pressure sensor is disposed on the top of the battery blast protective container body. The battery thermal runaway trigger assembly comprises a fixing device and a tested battery sample on the fixing device. The battery thermal runaway trigger and released gas collecting device has a beneficial effect of satisfying a thermal runaway triggering and gas collecting function of batteries in different sizes.

Real time battery impedance spectrum is acquired using one time record, Compensated Synchronous Detection (CSD). This parallel method enables battery diagnostics. The excitation current to a test battery is a sum of equal amplitude sin waves of a few frequencies spread over range of interest. The time profile of this signal has duration that is a few periods of the lowest frequency. The voltage response of the battery, average deleted, is the impedance of the battery in the time domain. Since the excitation frequencies are known, synchronous detection processes the time record and each component, both magnitude and phase, is obtained. For compensation, the components, except the one of interest, are reassembled in the time domain. The resulting signal is subtracted from the original signal and the component of interest is synchronously detected. This process is repeated for each component.

The utility model relates to system for testing battery performance , which is designed to test charging and discharging performance of the battery of electronic equipment; wherein, the electronic equipment is provided with a charge-discharge operation program. The system comprises a controlling host machine and a power control equipment; wherein, the controlling host machine is used to produce a piece of configuration information which is to be transmitted through a first and second parallel transmission interfaces to the power control equipment, and the controlling host machine builds up a network connection with the electronic equipment connected with the power control equipment through network; the power control equipment comprises a plurality of connection ports, based on the control console to send configuration information production and the configuration information over the same test power supply, which covers the testing power output through a port to generate a plurality of test power supplies consistent with the configuration information. The test power supplies are respectively output to the electronic equipment through the connecting interfaces for charge-discharge tests. At the same time the controlling host machine sends the test operation orders to the electronic equipment through network, so as to enable the electronic equipment to implement charge-discharge operational procedures and conduct charge-discharge test on the battery.

A method of testing a battery pack, wherein a load is connected to a charger and the battery pack, and receives power supply from either the external charger or the battery pack. When the external power line is normally supplied to the load through the charger, the battery pack is purposely enabled to start its discharge and to supply power to the load. When the output voltage of the battery pack drops below a threshold level or the discharging time exceeds a preset limit, the charger re-supplies its output voltage to the load and to charge the battery pack. By the purposeful charge/discharge operations, characteristic data of the battery pack are collected and recorded for estimation of the battery pack capacity and the remaining service life.

The invention discloses a battery charging and discharging tester which is used for testing charging and discharging performance of a to-be-tested battery. The battery charging and discharging tester is provided with an upper computer, a data transfer unit and a lower computer, wherein the upper computer is connected with the lower computer through the data transfer unit with serial bus RS-485 adopted. The upper computer is connected with the lower computer through the serial bus RS-485 to finish data communication between the upper computer and the lower computer. The lower computer includes a charging unit, a discharge load unit, a main control unit and the to-be-tested battery, wherein the charging unit, the discharge load unit, and the to-be-tested battery are respectively connected with the main control unit, and the to-be-tested battery and the discharge load unit are connected with the charging unit in sequence. Compared with the prior art, the battery charging and discharging tester has the advantages of being simple, convenient, reliable in quality, stable in running, high in measurement accuracy, reasonable in design, high in automation level and the like.

The invention relates to a method and a device for measuring diaphragm closed pore temperature and broken film temperature of a lithium ion battery, which is characterized by comprising the following steps: (1) preparing a testing battery; (2) heating the testing battery and rising the ambient temperature from 30 DEG C to 200 DEG C; (3) recording data, recording the temperature of the testing battery every 5 sec and resistance corresponding to the temperature; (4) processing data, drawing a temperature-resistance curve for the testing battery, calculating the change of the resistance at interval of 5 sec, and determining the closed pore temperature and broken film temperature according to the rising amount of the resistance to excess 50 omega for the first time and the reducing amount of the resistance to excess 50 omega fro the first time; and (5) calculating the result. The device in the invention comprises a baking oven, a resistance tester and a thermocouple; wherein, the resistance tester is connected with a lug of the testing battery; the thermocouple is connected with the testing battery in a contacting manner. The invention has the advantages of conveniently measuring the diaphragm closed pore temperature and broken film temperature of the lithium ion battery and providing basis and safe guarantee for selecting diaphragm in proper category when preparing the lithium battery.

A testing device which measures minute changes in battery electrode thickness due to repeated charge/discharge cycles. The testing device uses a moving wall to detect changes in electrode dimensions, typically thickness. The moving wall is adjacent a surface of the electrode, and is connected a sensor that measures wall displacement induced by electrode dimensional changes. Also included in the testing device is a thermocouple that senses the temperature of the device, allowing the data sampling and processing means to correct for thermal expansion/contraction during operation. The testing device can be used during the battery cycling as it does not interfere with the charge/discharge/recharge process. The testing device can be used to measure either a single electrode, or a plurality of electrodes assembled into an electrode stack and incorporated either into a test cell or into a working battery.