Battery internal resistance abnormal identification method, device, storage medium and vehicle
A technology of abnormal identification and battery internal resistance, which is applied in battery/fuel cell control devices, electrical devices, electric vehicles, etc., can solve the problem of occupying computing resources, and achieve the effect of reducing computing resources
Active Publication Date: 2022-07-05
SVOLT ENERGY TECHNOLOGY CO LTD
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[0003] In order to identify aging batteries, related technologies use signals of different dimensions uploaded by the vehicle to estimate the impedance value of the battery cell, and determine whether the internal resistance of the battery cell is abnormal based on the estimated impedance value, but multi-dimensional calculations also take up more time. more computing resources
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[0088] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, but not to limit the present disclosure.
[0089] figure 1 is a flowchart of a method for identifying abnormal internal resistance of a battery shown in an exemplary embodiment of the present disclosure, as shown in figure 1 As shown, the method includes:
[0090] In step S11, battery data is acquired. The battery data may include voltage data and current data of each cell in the battery. For example, the voltage data and the current data may be obtained based on a voltage sensor and a current sensor, respectively, which is not limited in the present disclosure.
[0091] In step S12 , a target stationary operating condition cell voltage difference value, a target operating condition voltage difference valu...
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The present disclosure relates to a method, device, storage medium and vehicle for identifying abnormal internal resistance of a battery. The method includes: acquiring battery data, where the battery data includes voltage data and current data of each cell in the battery; Determine the cell voltage difference value under the target static working condition, the voltage difference value under the target working condition, and the first current value corresponding to the voltage difference value under the target working condition; The working condition voltage difference and the first current value determine the cell internal resistance difference corresponding to the battery; if the cell internal resistance difference is greater than the internal resistance difference threshold, it is determined that the internal resistance of the battery is abnormal . The above technical solution can identify the battery with abnormal internal resistance by calculating the internal resistance difference between the cells. Moreover, this method does not need to calculate the internal resistance value of each battery cell, so it can reduce the occupation of computing resources in the process of identifying abnormal internal resistance of the battery.
Description
technical field [0001] The present disclosure relates to the technical field of batteries, and in particular, to a method, device, storage medium, and vehicle for identifying abnormal internal resistance of a battery. Background technique [0002] When designing a new energy power battery, factors such as maintenance cost, heat dissipation, and safety are considered, and a number of cells are usually connected to form a battery with a larger capacity. As the battery continues to charge and discharge, the difference between the cells gradually increases. For example, the internal resistance of some aging cells may become larger, thereby increasing the heat generation of the cells and causing the temperature of the cells to rise. The rise in cell temperature may further accelerate the aging speed of the cell, resulting in a further increase in internal resistance. Ultimately, the internal resistance and temperature rise form a pair of negative feedback, which accelerates the...
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IPC IPC(8): B60L58/12B60L3/00
CPCB60L58/12B60L3/0046B60L2240/547B60L2240/549Y02E60/10
Inventor 王棚超高攀龙
Owner SVOLT ENERGY TECHNOLOGY CO LTD