How to use the Six Sigma tool 5 Whys for Battery Energy Storage Systems (BESS) problem?

The 5 Whys is a powerful Six Sigma tool that can be applied to any industry or process, even including the Battery Energy Storage Systems market. Here are the steps to use the 5 Whys tool specifically for Battery Energy Storage Systems (BESS):

Define the Problem: Clearly defining the problem or issue helps in trying to address related technical issues. For example, the system may be failing to meet the required capacity or efficiency levels.

Ask "Why" 5 Times: Start by asking "why" the problem is occurring. Write down the answer, then ask "why" again based on the answer to the previous question. Repeat this process five times, each time asking "why" based on the answer to the previous question. For example:

Why is the Battery Energy Storage system failing to meet the required capacity levels?

• Because the battery cells are not holding a charge.

Why are the battery cells not holding a charge?

• Because the temperature in the battery is too high, causing the cells to degrade.

Why is the temperature in the battery too high?

• Because the cooling system is not functioning properly.

Why is the cooling system not functioning properly?

• Because the coolant levels are too low.

Why are the coolant levels too low?

• Because there is a leak in the coolant system.

Analyze the Results: Once you have asked "why" five times, we should have identified the root cause of the problem. In this case, the root cause is a leak in the HVAC system, which is causing the battery cells to overheat and degrade. Review the answers you wrote down and look for common themes or patterns.

Develop a Solution: Based on the root cause you have identified, develop a solution to address the problem or issue. For example, you may need to repair or replace the coolant system to prevent leaks and maintain the proper temperature of the battery.

Implement the Solution: Put the solution into action and monitor the results. If the solution is not effective, you may need to revisit the 5 Whys process to identify additional root causes.

By using the 5 Whys tool for BESS technical problems, we can identify the underlying causes of problems and develop effective solutions to improve the performance and efficiency of your system. This is just a small problem sample example, there could be other systemic issues taking place.

Christopher Sanderson is a Senior Member of IEEE (SMIEEE), Certified LEAN Six Sigma Black Belt (CLSSBB), and Power & Distribution Subject Mater Expert who shared his experience with some of the world’s leading manufacturers. He can be contacted on LinkedIn.  

#battery #batteries #energystorage #batteryenergystorage #whomovedmycheese