Battery balancing method, system, vehicle, storage medium and electronic device
A technology of battery balancing and balancing current, applied in the field of control, can solve the problems of low balancing efficiency and inability to achieve balancing effect, etc.
Active Publication Date: 2021-02-23
BYD CO LTD
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Problems solved by technology
In the process of equalizing a single battery, if the equalization time of a single battery is too long, it will increase the inconsistency of each single battery in the battery pack where it is located, resulting in low equalization efficiency; if the equalization time of a single battery If it is too short, the balance effect will not be achieved
Method used
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Embodiment approach
[0056] During the charging process of the battery pack, obtain the charging time required for the voltage of each single battery to rise from the initial terminal voltage by one unit voltage (for example, 1V);
[0057] For each single battery in the battery pack, determine the time rate of change value of the single battery as the ratio of the required charging time of the single battery to the value of the unit voltage; or,
[0058] During the discharge process of the battery pack, obtain the discharge time required for the voltage of each single battery to drop from the initial terminal voltage by one unit voltage;
[0059] For each single battery in the battery pack, determine the time rate of change value of the single battery as a ratio of the required discharge time of the single battery to the value of the unit voltage.
[0060] During the charging or discharging process of the battery pack, the voltage change of the single battery is recorded, so that the time change r...
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The present disclosure relates to a battery equalization method, system, vehicle, storage medium, and electronic equipment. The method includes: obtaining the time change rate of a single battery to be balanced in a battery pack; obtaining a reference time change rate required for equalization; according to The time rate of change of the single battery to be balanced and the reference time rate of change determine the target equalization duration of the single battery to be balanced; and control the balance of the single battery to be balanced according to the target equalization time. Since the target equalization duration based on the equalization process is calculated based on the difference between the time change rate of the single battery to be balanced and the reference time change rate, it is more accurate, which in turn makes the equalization process more accurate and avoids the need for equalization time. Either too long or too short occurs.
Description
technical field [0001] The present disclosure relates to the technical field of control, and in particular, relates to a battery balancing method, system, vehicle, storage medium, and electronic equipment. Background technique [0002] Large-capacity batteries that provide power energy for electric vehicles are often called power batteries. Vehicle power batteries generally consist of multiple single cells connected in series to form a module. With the use of the battery, the difference between the individual batteries gradually increases, and the consistency between the individual batteries is poor. Due to the short plate effect of the battery, the capacity of the battery pack is limited, so that the capacity of the battery pack cannot be fully utilized, resulting in the failure of the battery pack. Overall capacity is reduced. On the other hand, after the differences among individual batteries gradually expand, some single batteries will be overcharged and some single ba...
Claims
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IPC IPC(8): H01M10/42H02J7/00
CPCH02J7/0021H01M10/42H01M10/425H01M10/4257H02J7/0014H02J7/0068Y02E60/10
Inventor 罗红斌王超沈晓峰曾求勇刘苑红张祥
Owner BYD CO LTD