Lithium ion battery module SOC difference calculation method and device
A technology for lithium ion batteries and computer equipment, applied in the field of lithium ion battery module SOC difference calculation methods and equipment, can solve the problems of difficulty in calculating the module SOC difference, large self-discharge, affecting the normal use of battery packs, etc., and achieve reliable and rapid calculation. Effect
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[0028] In order to make the objects, technical solutions, and advantages of the present invention more clearly, the technical solutions in the embodiments of the present invention will be described in contemplation in the embodiment of the present invention. It is an embodiment of the invention, not all of the embodiments.
[0029] like figure 1 As shown, the lithium ion battery module SOC difference calculation method according to the present embodiment includes the following steps, including through a computer device:
[0030] The monitoring data of the two modules when the lithium iron phosphate system battery pack is obtained, including voltage, SOC value;
[0031] Intercept 40% SOC ~ to 80% SOC charging data;
[0032] The interception data for the two modules is fitted through the SigmoID function, respectively;
[0033] Calculate the SOC value corresponding to the inflection point of the two modules charging SOC voltage curve according to fitting parameters;
[0034] The SOC...
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