Capacity loss measuring method for battery system and battery system
A battery system, capacity loss technology, used in the automotive field, which can solve problems such as inaccuracy
Active Publication Date: 2014-08-20
GREAT WALL MOTOR CO LTD
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[0003] The above method has the following disadvantages: the capacity loss of the battery system is not just the capacity loss of the cells of the single battery, so it is not accurate to use the capacity loss of the cells of the single battery to reflect the capacity loss of the battery system
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[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0027] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element refe...
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The invention discloses a capacity loss measuring method for a battery system. The capacity loss measuring method comprises the following steps: in a first temperature range, when the battery system is in a full charge state, discharging the battery system into an empty electricity state from the full charge state, and recording a first discharge capacity when discharging is finished; keeping the first temperature range unchanged and charging the battery system into the full charge state from the empty electricity state; keeping the first temperature range unchanged, arranging the battery system for preset time in a first humidity range, and after the first preset time is due, stopping discharging and recording a second discharge capacity when the battery system is discharged till the battery system is in the empty electricity state again; the capacity loss rate of the battery system in the first temperature range is obtained according to the first discharge capacity and the second discharge capacity. According to the capacity loss measuring method for the battery system, the capacity loss situation of the battery system can be objectively, comprehensively and accurately reflected. The Invention further discloses the battery system.
Description
technical field [0001] The invention relates to the technical field of automobiles, in particular to a battery system capacity loss testing method and the battery system. Background technique [0002] During the storage and use of the battery system, there is a phenomenon of capacity loss, that is, the energy of the battery system does not enter the external circuit through discharge but is lost in other ways. In the related art, the capacity loss of the battery system is usually detected by detecting the capacity loss of the cells of the single battery, and the capacity loss of the cells of the single battery is used to reflect the capacity loss of the battery system. [0003] The above method has the following disadvantages: the capacity loss of the battery system is not just the capacity loss of the cells of the single battery, therefore, it is not accurate to reflect the capacity loss of the battery system by the capacity loss of the cells of the single battery. Conten...
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IPC IPC(8): G01R31/36H01M10/48
CPCY02E60/10
Inventor 刘俊平盛杰李鹏飞
Owner GREAT WALL MOTOR CO LTD