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BMS with Li-Battery



		

			

									
					    KaHo
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jan 29, 2013 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi
    
 
    I am going to develop a standalone system and use Li-ion battery for the power source.
    
 
    In addition, I need to connect several packs of Li-ion battery in parallel to maximize the standby period. 
    
 
    (P.S, in this system, there is no charging functions as the batteries will be received  for charging.)
    
 
    And my concern is the system should be implemented a battery management system for a batter energy control and safety.
    
 
    Safety is the mainly concerning point as I think it is dangerous to connect those packs of batteries in parallel, am I right?
    
 
    Is there any controlling ICs or circuits of such kind of BMS?
    
 
    I have no ideas for that...
    
 
    Regards
    
 
    KaHo
    
									
			        
		
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                        
                on Jan 31, 2013 1:13 PM
            
            
					
      
	
      

		
		
      
					
      If there is no charging you could connect each pack through a suitable diode to a common battery rail.  This would prevent one pack charging another should they be charged to different levels or of a different age.  I would suggest that each pack makes use of monitoring such as the solutions Luca suggested, particularly with regard to monitoring the stack current, voltage and temperature.  Should any pack experience over discharge, increased temperature or exceed its discharge current specification it should be disconnected from the circuit.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
			                            
                        
                on Jan 31, 2013 1:13 PM
            
            
					
      
	
      

		
		
      
					
      If there is no charging you could connect each pack through a suitable diode to a common battery rail.  This would prevent one pack charging another should they be charged to different levels or of a different age.  I would suggest that each pack makes use of monitoring such as the solutions Luca suggested, particularly with regard to monitoring the stack current, voltage and temperature.  Should any pack experience over discharge, increased temperature or exceed its discharge current specification it should be disconnected from the circuit.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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