A lithium battery factory with 200 workstations spends a significant amount annually on consumables and labor for printing, distributing, and recycling paper-based SOPs, an expense that could cover the cost of several all-in-one terminals. The situation becomes even more complicated during revisions; when processes are adjusted, clerks must physically visit each workstation to replace pages. Missing a single page creates a quality hazard. In recent years, many lithium battery factories have adopted electronic SOPs, yet their effectiveness varies greatly. Essentially, the issue is not whether the system works, but whether the scenario adaptation was implemented correctly. The following section discusses practical experiences regarding electronic SOPs in lithium battery factories based on typical scenarios.
1. Capacity Formation and Activation Workshops: Selecting the Right Line Change Method for High-Mix Low-Volume Production
What do lithium battery factories fear most regarding electronic SOPs? Frequent line changes. In capacity formation and activation workshops, a single production line often runs different cell models. In the paper era, this relied on team leaders shouting instructions or flipping through folders to find SOPs. After implementing electronic SOPs, there are 16 possible methods for line changes, but one should not overcomplicate things by selecting too many options. Instead, configure them according to personnel and specific roles. For workstations operated directly by workers, use terminal touch interfaces for line changes that support fuzzy search; entering a model fragment allows immediate retrieval of the corresponding SOP. When a line leader patrols the floor, they can use a mobile phone to switch lines with a single click, synchronizing the entire line's terminals and completing the process within seconds. Suppose a hypothetical activation line has 30 devices; estimates suggest that a skilled operator can distribute SOPs to the entire line within 30 to 60 seconds. This is significantly faster than replacing paper pages, and crucially, it eliminates the risk of deploying incorrect versions.
2. Injection Molding and Structural Component Processes: Binding Mold Numbers to SOPs
Lithium battery factories produce not only cells but also casings and covers via injection molding and structural component processes. A key characteristic of these processes is frequent mold changes. By binding mold numbers to SOPs, workers can input the mold number into the terminal to retrieve the corresponding work instruction, supporting fuzzy search so the full number does not need to be memorized. For injection machines running a single mold type for extended periods, treat each machine as a separate line. Industrial Engineering (IE) or Process Engineering (PE) staff can issue instructions centrally from the management end, requiring no action from the worker at the terminal. The pitfall in this scenario lies in establishing unified numbering rules during the initial phase. If mold numbers, equipment numbers, and SOP file names do not align, significant operational issues will arise later.
3. Offline and Network-Disconnected Areas: Offline Capability is the Baseline
Some areas within lithium battery factories have poor network coverage, or external internet access is prohibited for safety reasons. Electronic SOP systems must support offline operation; when terminals cannot connect to the server, they should display locally cached SOP files and videos, allowing single-machine line changes even without a network connection. Deployment options include local area networks (LAN), cloud platforms, or remote connections via 5G IoT cards. Databases should support SQL Server, MySQL, Oracle, or Access. During selection, clearly verify offline capabilities to avoid discovering after installation that the system displays a black screen upon network disconnection.
4. Change Management: Revision Notifications Are More Critical Than the Revisions Themselves
Paper SOP revisions rely on manual monitoring, whereas electronic SOP revisions depend on defined workflows. Upon document change, relevant workstations receive automatic notifications. Version management ensures synchronization across all terminals, while audit processes can be customized to include electronic signatures, controlled publication, and traceable logs. Over time, the most valuable asset of an electronic SOP system in a lithium battery factory is this traceability—it records which workstation viewed which version and at what time. A critical reminder: the recipient list for change notifications must be regularly maintained. If personnel transfers occur without updating the list, notifications may be sent to irrelevant individuals, rendering the communication ineffective.
Vendors offering electronic SOP solutions include both agents and original manufacturers. Ultimately, the adaptation strategy for electronic SOPs in lithium battery factories can be summarized in one sentence: match functions to scenarios rather than searching for scenarios based on available functions.
If a factory is currently struggling with the revision and line change challenges associated with paper SOPs, consider conducting a scenario simulation in a single workshop first. Test the three key elements: line change methods, offline capabilities, and change notification mechanisms.