Optimize battery charging current test principle

How to optimize battery charging strategy?

In consideration of battery charge polarization and temperature rise constraints, the optimized charging strategy can be summarized as follows. First, taking the acceptable charge current as the optimal charge current limit, the battery is charged with high current at the initial charging stage to speed up the charging process.

Does a physics-based battery model optimize charging strategies?

With a physics-based battery model, a multi-objective optimal control problem is proposed to investigate the charging strategies that optimally trade off the temperature rise, charging time, and loss. First, a fast-charging strategy (minimum time) with the sole purpose of reducing charging time is presented and experimentally validated.

Is battery charging an explicit optimization problem?

Because charging time, charging loss, and temperature rise are all coupled together, it is important to consider all of them and their interactions when designing a charging strategy for a particular application. More recently, some other researchers consider the battery charging as an explicit optimization problem.

What are the objectives of a battery optimization problem?

The objective is to minimize the total cost which consists of multiple conflicting objectives, such as charging time, charging energy loss, and temperature rise. At each stage of the optimization problem, there are states of the process.

How long does it take CC/CV to charge a battery?

However, it takes 6 more minutes to charge the battery fully. The experimental results show that, compared with the standard CC/CV method, the balanced charging strategy has a similar temperature rise as 4C CC/CV charging, but the charging time is reduced by 24.8% and the charging loss is reduced by 56.4%.

How can a battery model predict charging current?

Battery model-based methods can predict charging current by employing, e.g., a lumped equivalent circuit model, an ac-impedance model, or an electrochemical model. They combine external electrical behavior with internal reaction mechanisms, searching for the optimal charging current.