A kind of aerospace lithium battery managing chip reliability verification methodTechnical field
The present invention relates to a kind of aerospace lithium battery managing chip reliability verification methods, belong to electronic component test neckDomain.
Background technique
Currently, lithium-ions battery is the trend of aerospace energy-storage system application development, as aerospace power supply product gradually makesUse lithium-ions battery group as power-supply system energy-storage travelling wave tube, to the reliability of lithium-ions battery group management system (BMS), steadyQualitative, lightweight, it is intelligentized require it is higher and higher.The appearance for the lithium-ions battery pack management chip that domesticizes, has broken stateOutside to the monopolization of BMS application field function of tonic chord integrated circuit, the aerospace of high-precision, High Reliability Design is based especially on domesticChange succeeding in developing for lithium-ions battery pack management chip, is the light weight of aerospace lithium-ions battery group management system (BMS)Change, high-reliability, high precision design lay a solid foundation.
Lithium-ions battery managing chip is applied in spacecraft power supply system battery management circuit, as battery management electricityThe function of tonic chord chip on road monitors the important informations such as monomer voltage, the battery pack temperature of battery pack, and space station technical indicator is more, wantsIt asks height, operation on orbit service life long, very high requirement is proposed to device functional reliability.For the application characteristic for obtaining componentData, and risk of the lithium-ions battery managing chip in spacecraft application circuit is reduced, it needs to aerospace lithium battery pipeIt manages chip and carries out related reliability verifying, to assess its aerospace applications adaptability.
Existing detection method mainly tests to device parameters index and the accordance of normal value on handbook, does not haveIt is worked by a series of experiments, assessment and overall merit, to determine the maturity of component development and the relevance grade of aerospace applications.
Summary of the invention
For not doing for the prior art, method of the invention is intended to provide a kind of aerospace lithium battery managing chip reliabilityVerification method carries out related reliability verifying to aerospace lithium battery managing chip, to assess its aerospace applications adaptability.
A kind of aerospace lithium battery managing chip reliability verification method, the method steps are as follows:
Step 1: design evaluatio index system, aerospace is analyzed with lithium battery managing chip reliability key parameter；
Step 2: according to assessment indicator system design evaluatio verification test project；
Step 3: carrying out structural analysis work；
Step 4: carrying out electrical characteristics consistency analysis；
Step 5: carrying out limiting performance assessment；
Step 6: carrying out radiation resistance assessment；
Step 7: carrying out the verifying of electrical characteristics adaptability；
Step 8: carrying out mechanical environment and the verifying of thermal environment adaptability；
The present invention is to obtain the application characteristic data of component, and reduce lithium-ions battery managing chip and answer in spacecraftWith the risk in circuit, related reliability verifying effectively can be carried out to aerospace lithium battery managing chip, be answered with assessing its aerospaceUse adaptability.
Detailed description of the invention
Fig. 1 show aerospace lithium battery managing chip structural analysis flow chart；
Fig. 2 show aerospace lithium battery managing chip structural unit decomposition diagram；
Fig. 3 show aerospace lithium battery managing chip typical application circuit schematic diagram；
Fig. 4 show the design typical application circuit of the embodiment of the present invention.
Specific embodiment
To be clearer and more comprehensible the purpose of the present invention, feature, 1-4 is to a specific embodiment of the invention with reference to the accompanying drawingIt is further described.
The present invention is achieved by the following scheme: it the described method comprises the following steps:
Step 1: design evaluatio index system, aerospace is analyzed with lithium battery managing chip reliability key parameter；Following table 1 gives assessment indicator system.
Table 1
Step 2: generally comprising structural analysis, functional performance according to assessment indicator system design evaluatio verification test projectAnalysis, limiting performance assessment, radiation resistance assessment, plate grade electrical characteristics adaptability teaching, plate grade thermal environment Adaptability Evaluation,Mechanical environment Adaptability Evaluation, EMC electromagnetic compatibility Adaptability Evaluation etc..
Step 3: carrying out structural analysis work, carry out structural analysis work by Fig. 1 and Fig. 2.
Step 4: being analyzed with the consistency of lithium battery managing chip aerospace, including room temperature, high temperature, low temperature ShiShimonosekiThe consistency distribution situation of bond parameter, parameter is including at least cell input terminal always cannot be adjusted error, auxiliary input terminals always can notAlignment error, cell input terminal static leakage current, auxiliary input terminals static leakage current, reference voltage, reference voltage linearly adjustRate, reference voltage opening time, stabilizer output voltage, voltage-stablizer line regulation, voltage-stablizer load regulation, transition periodMain device source current during main device source current, data readback, complete switches off mode at software switching-off main device source currentMain device source current etc..Table 1 is the uniformity test result of typical aerospace lithium battery managing chip.
Step 5: assessing the environment resistant limiting range of stress performance of aerospace lithium battery managing chip, including input electricityCompression, supply voltage stress, temperature stress, mechanical stress etc., the assessment of the temperature stress limit are substantially carried out temperature cycles and temperatureImpact test is spent, mechanical stress is substantially carried out impact test, random vibration test, Constant Acceleration Test.Table 2 is typical aerospaceWith the limiting performance measured value of lithium battery managing chip.
2 aerospace of table lithium battery managing chip limiting performance
Step 6: assessing the anti-space radiation environment performance of aerospace lithium battery managing chip, including accumulated doseEffect and single particle effect.
Step 7: by Fig. 4 design typical application circuit, to aerospace with lithium battery managing chip in typical case routeAdaptability is verified, and at least test device register read/write command executes correctness, read-write sequence, the transmission of daisy chained dataCorrectness, static state/dynamic power consumption.Table 3 gives the plate grade electrical characteristics verification test of typical aerospace lithium battery managing chipMeasured result.
The plate grade electrical characteristics verification test measured result of the typical aerospace lithium battery managing chip of table 3
Step 8: thermal environment adaptability, the mechanical environment adaptability to aerospace lithium battery managing chip are verified,Aerospace is existed with lithium battery managing chip under the conditions of at least testing thermal cycle, thermal vacuum, random vibration, sinusoidal vibration, mechanical shockAdaptability in typical case route, test parameter include that device register read/write command executes correctness, read-write sequence, chrysanthemumCorrectness, the static state/dynamic power consumption of chained record transmission.