- Build the battery pack firstproduct family matrix, confirm which specifications can share the main body and which ones must use dedicated modules.
- Quick change platforms need to be unifiedMechanical positioning, locking, air circuit, electrical and identification interface。
- Error prevention should not just rely on scanning codes, but should formModel—Jig—Formula—Toolingconsistency check.
- Must be executed after the model change is completedIn place, air tight, identification, empty and first articleConfirm.
A single EV production line may handle battery packs with different wheelbases, capacities, or structures. Mixed-model handling requires more than changing parameters: the active model, installed tooling, mechanical interface, energy connections, and control recipe must all match. Any mismatch can cause an incorrect gripping location, housing damage, or failed placement.
01Use product family matrix to determine quick change boundaries
Compare the target battery packs based on weight, size, center of gravity, hanging points or load-bearing areas, positioning benchmarks, shell stiffness, interface protection and handling attitude. Specifications with similar stress paths can share the basic frame and adapt by moving the fulcrum or replacing the contact block; specifications with obvious differences should use independent modules.
The matrix should include the smallest, largest and most unfavorable combinations and clarify whether future models are only interface-ready or have already completed formal validation. Don't express "interface scalable" as "compatible with all future models".
02Five interfaces of quick change platform
- Mechanical positioning:Ensure that the modules are in the same position after repeated installation and can withstand the specified load and moment.
- Mechanical locking:The locking state is clear and detectable and cannot be maintained solely by air pressure.
- Pneumatic circuit/vacuum:The interface is error-proof and seals reliably, controlling residual pressure and protecting the joint when disconnected.
- Electrical and Signaling:Connect sensors, identification and control loops to avoid misplugging and pulling.
- Identification:Each module has a unique number and a relationship with products and recipes.
03The jig storage rack is also a mistake-proofing device
The storage rack should give each module a fixed position and clear number, and allow the tooling to be parked in a stable posture. The removal and return of the fixture can be confirmed through mechanical keys, position sensing or electronic identification. The positioning surface, suction cups, connectors, sensors and hoses should be protected during storage to prevent the module from being damaged while offline without being discovered.
04How to combine identification methods
| Identification method | Advantages | need attention |
|---|---|---|
| Mechanical coding/keying | Intuitive and prevents physical misinstallation | Coverage combinations limited, subject to inspection after wear |
| Sensor combination | Direct access to control logic | To diagnose disconnections, adhesions and inconsistent conditions |
| Barcode/QR code | Low cost and clear information | Reliance on manual scanning and label readability |
| RFID | Automatic reading, no line of sight required | Need to manage read and write ranges, tag corruption and repeated reads |
| Released by production system | Can be associated with scheduling and traceability | Must safely degrade when communications are interrupted |
High-risk actions should not rely solely on a single identification information. The production model, fixture identity, mechanical locking and key contact status can be used for plausibility verification to expose wrong combinations before lifting.
05Establish four-party consistency check
Before running the equipment, it should be confirmed: the production system or the operator selectedcar model, on the quick change interfaceFixture module, control system callsparameter recipe, at the target positionTooling or palletsmatch each other. If any object is inconsistent, clamping, lifting or releasing should be prohibited and a clear error message should be given.
The alarm information should be able to guide recovery, such as "Model B/Current fixture A does not match", rather than just displaying "System Failure". Maintenance mode and bypass permissions should be controlled and recorded to avoid long-term bypassing of error-proofing in order to meet deadlines.
06Standard changeover process
- Stop the current cycle, make sure the fixture is unloaded and stops at the specified changeover position.
- Isolate or release the energy that needs to be processed and unlock the interface.
- Place the old module into the corresponding storage location and confirm stable support.
- Take the target module and complete positioning, locking and pneumatic and electrical connections.
- The system reads the module identity and verifies it against the target model and recipe.
- Perform interface in place, air tightness, sensor and no-load function checks.
- Release production using first article verification of grip, path, flip and placement.
07Recipe management requires version and permissions
Recipes can include balance parameters, action sequences, vacuum or pressure judgments, flip angles, position cues, and cycle time configurations. Each modification should have version, reason, approval and verification records. Critical safety logic should be implemented through controlled design, and thresholds should not be opened to daily operators at will.
08Quick change system verification matrix
| test scenario | expected result | evidence |
|---|---|---|
| Correct model + correct fixture | Complete the self-test and allow it to run | Status records and first article results |
| Correct model + wrong fixture | Prohibit dangerous actions and clearly call the police | Interlock test record |
| The clamp is not fully locked | No lifting or flipping allowed | In place and locked test |
| The gas and electrical interface is not connected | Detect exceptions and maintain recoverable states | Disconnect test |
| Identification or communication interruption | Do not call default error recipe | Fault injection record |
| New models | Completely passed load, path and exception verification | Vehicle model verification report |
The flexibility of multi-gauge collinearity comes from modularity and consistent information, not from relaxing fixture boundaries. Only by incorporating each battery pack specification into a traceable verification matrix can rapid changeover and safe production be established at the same time.