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MAX17263 Production
The MAX17263 is an ultra-low power fuel gauge which implements Maxim ModelGaugeâ„¢ m5 EZ algorithm. The MAX17263 monitors either a single cell battery...
Datasheet
MAX17263 on Analog.com

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Can someone help with ModelGauge m5 EZ Characterization for LiFePO4 (4S 6000mAh)

		
	
				

			

									
					    sBal94
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Apr 2, 2026 
				
			
			
		

		
		                     
				
        		

		    
		    		    

		      		            		        
Category: Software

    		        		            		    
Product Number:  MAX17263  

    		        		        		        
Software Version: 1.0.34

    		    		    

		    		    
		    			

			    


I’m working on a power‑management system that uses the ModelGauge m5 EZ algorithm, and I need help understanding how to properly characterize and configure the fuel gauge for a LiFePO₄ 4‑cell battery pack.


    

  • Chemistry: LiFePO₄ 
    • 

  • Configuration: 4S
    • 

  • Capacity: 6000 mAh (with 100 mA charge‑termination current)
    • 

  • Nominal Voltage: 12.8 V (3.2 V per cell)
    • 



I can connect the battery to the evaluation kit and read data, but the software does not allow me to set a 1 mΩ sense resistor, which is required in my design.


The Software Implementation Guide lists several parameters that need to be written during configuration, but does not clearly explain which ones are essential or how they should be calculated.


    

  1. What are the minimum parameters that need to be configured initially for the ModelGauge m5 EZ algorithm?
    2. 

  2. Does the fuel gauge eventually learn and update internal parameters automatically after several charge/discharge cycles, or must everything be configured manually?
    3. 

  3. Are there any recommended initialization files, example configurations, or reference setups available specifically for LiFePO₄ 4‑cell battery packs?
    4. 






			

			
									
		                             
                        

    

                                            
                 software
                
                                                    
                 Battery Monitors & Fuel Gauges
                
                                                    
                 MAX17263
                
                                                    
                 battery management
                
                                                    
                 1.0.34
                
                                
            

    
    
		


				
				        
        		

			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		


        
        
        
    
					

				
    
					
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