Lithium battery protection stepping loading parameter calculation method
A parameter calculation, lithium battery technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of reduced protection test resolution, deviation of load value and actual value, affecting the time integration of the protection board IC, etc. Variety and flexibility, the effect of improving precision
Active Publication Date: 2019-12-31
FUJIAN NEBULA ELECTRONICS CO LTD
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[0004] 1. If the step loading value is set too large, the resolution of the protection test will be reduced, thereby affecting the accuracy of the captured protection points; 2. If the step loading value is set too small, less than the loading resolution, the loading value will be reduced. The deviation from the actual value will affect the protection test results and prolong the protection test time; 3. If the step loading time is set too large, it will affect the time integration of the protection board IC, causing the protection board to be protected in advance; 4. If the step loading If the time setting is too small, less than the timing resolution, it will cause inaccurate timing of each protection step duration, thus affecting the protection test results
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[0038] Please refer to Figure 1 to Figure 2 As shown, a preferred embodiment of the step loading parameter calculation method for lithium battery protection of the present invention includes the following steps:
[0039] Step S10, knowing the loading upper limit value (Value_up), loading lower limit value (Value_down), loading resolution (Value_min) and timing resolution (Tmin) of the loading voltage of the step slope protection, and setting a maximum step loading value (Value_user); the upper limit of loading is the final value of the step, depending on the specifications of the lithium battery to be tested; the lower limit of loading is the initial value of the step, depending on the specification of the lithium battery to be tested ; The loading resolution is the minimum step accuracy of the test equipment, which is determined by the characteristics of the test equipment; the timing resolution is the minimum timing accuracy of the test equipment, which is determined by the...
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The invention provides a lithium battery protection stepping loading parameter calculation method and belongs to the technical field of lithium battery testing. The method comprises the following steps that: S1, a loading upper-limit value, a loading lower-limit value, a loading resolution and a timing resolution are known, and a maximum stepping loading value is set; S2, first climbing time is calculated; S3, a first loading stepping frequency is calculated according to the loading upper-limit value, the loading lower-limit value and the loading resolution; S4, a second loading stepping frequency is calculated according to the first climbing time and the timing resolution; S5, a small value is assigned to the third loading stepping frequency; S6, a first stepping loading value and stepping loading time are calculated according to the loading upper-limit value, the loading lower-limit value, the third loading stepping frequency and the first climbing time; and S7, a final stepping loading parameter is calculated based on the maximum stepping loading value and the first stepping loading value. With the method adopted, the stepping loading value and the stepping loading time are accurately calculated, so that the precision of a lithium battery protection function test is improved.
Description
technical field [0001] The invention relates to the technical field of lithium battery testing, in particular to a calculation method for step loading parameters of lithium battery protection. Background technique [0002] After the production and assembly of lithium batteries are completed, it is necessary to test the overvoltage and overcurrent protection functions of the finished lithium battery and the protection board of the lithium battery. Before conducting mass testing of lithium batteries, it is necessary to quickly measure the protection points of lithium batteries and protection time and other parameters; in order to measure parameters such as protection point and protection time, it is necessary to adopt the stepping ramp protection loading method. The step loading value and step loading time in the step slope protection loading method directly affect the accuracy of the test. [0003] However, traditionally, there is no calculation method for the step loading v...
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IPC IPC(8): G01R31/385
CPCG01R31/385
Inventor汤平郭胜熊刚邓秉杰林德超黄才旺李东平
OwnerFUJIAN NEBULA ELECTRONICS CO LTD