On-line estimation method of internal resistance of power battery pack and battery management system
A power battery pack and internal resistance technology, applied in battery/fuel cell control devices, measuring electricity, electric vehicles, etc., can solve problems such as large errors and underestimation of battery pack aging, increase data reliability, and save computing resources and power consumption, and the effect of improving the accuracy of internal resistance estimation
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[0033] It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.
[0034] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.
[0035] figure 1 It is a schematic flowchart of an online estimation method for the internal resistance of a power battery pack provided by an embodiment of the present invention. Such as figure 1 As shown, the online estimation method for the internal resistance of the power battery pack includes the following steps:
[0036] Step 101, obtaining the internal resistance and index data of each cell in the power battery pack, and judging whether the internal resistance of all cells currently obtained meets the estimation conditions, and the index data includes temperature, voltage and state of charge;
[0037] Step 102, if the internal resistances of all the batteries currently a...
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