Power battery, power MAP generation method and device thereof and vehicle

Abstract

The invention discloses a power battery, a power MAP generation method and device thereof and a vehicle. The method comprises the steps that region division is conducted according to the temperature range and the state of charge of the power battery; according to the single-core lower limit voltage and / or the single-core rated voltage of the power battery, different calculation strategies are adopted for different areas to determine the power MAP value of the power MAP. Therefore, the power MAP value of the power MAP is determined by dividing different areas and respectively adopting different calculation strategies for the different divided areas, so that the evaluated power MAP is closer to the actual power MAP, and the evaluation of the dynamic property and the economical efficiency of the whole vehicle is facilitated.

Description

technical field [0001] The present invention relates to the technical field of power batteries, and in particular, to a power battery and a power MAP generation method, device and vehicle thereof. Background technique [0002] At present, when evaluating the power MAP (table) of the power battery, that is, when evaluating the power of the power battery under different SOC (State of Charge, state of charge) and different temperatures, the rated voltage of a single cell * the number of cell strings is usually used. *System instantaneous current or single-cell lower limit voltage *cell string number *system instantaneous current to determine power MAP, but the former is prone to the situation that the actual voltage of a single-cell is less than the rated voltage of a single-cell when the SOC is low, so that the actual power It is lower than the estimated power given in the MAP table, and the problem of the latter is that the power value in the calculated MAP table is low becau...

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Problems solved by technology

[0002] At present, when evaluating the power MAP (table) of the power battery, that is, when evaluating the power of the power battery under different SOC (State of Charge, state of charge) and different temperatures, the single-cell rated voltage * the number of battery strings is usually used The power MAP is determined by *system instantaneous current or single-core lower limit voltage*cell string number*system instantaneous current, but the former is prone to the situation that the actual voltage of a single core is lower than the rated voltage of a single core when the SOC is low, so that the actual power It is lower than the estimated power given in the MAP table, and the problem of the latter is that because the selected single-core lower limit voltage is lower than the single-core rated voltage, the calculated power value in the MAP table is low, which causes the power MAP evaluation value to be different from the actual The power MAP value does not match, which is not conducive to the evaluation of vehicle power and economy

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