Vehicle lithium ion battery charging and discharging balance test method
The invention discloses a vehicle lithium ion battery charging and discharging balance test method. The method comprises the following steps of: S1, segmenting a battery pack and carrying out an open-circuit voltage test; S2, determining an average value of charging and discharging voltage charge qu...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a vehicle lithium ion battery charging and discharging balance test method. The method comprises the following steps of: S1, segmenting a battery pack and carrying out an open-circuit voltage test; S2, determining an average value of charging and discharging voltage charge quantity of each battery cell; S3, determining the charge quantity change value and the charging and discharging speed of each battery cell; S4, determining an average instantaneous charging and discharging slope matrix of the battery pack; S5, determining a battery pack row direction slope and a battery pack column direction slope; and S6, determining a charging and discharging balance coefficient to obtain the charging and discharging balance of a vehicle lithium ion battery. According to the method, the vehicle lithium ion battery pack is subjected to multi-dimensional decomposition, the charging and discharging balance is decomposed, integrated and analyzed on each decomposition unit, theaccuracy of a test result |
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