Patent ID: 11936233
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 9:
10. The method for controlling charging of the secondary battery pack according to claim 8,
wherein the step of determining a minimum temperature of the secondary battery pack is configured to estimate the third temperature (T2,estimate) based on a third equation below derived from a first equation and a second equation below:, m
    ⁢
    
     C
     p
    
    ⁢
    
     
      d
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       T
       
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        estimate
       
      
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  ⁢
  

  
   
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   
   
    
     
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           I
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        -
        
         
          
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           1
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        -
        
         
          
           T
           
            2
            ,
            estimate
           
          
          -
          
           T
           coolant
          
         
         
          R
          
           2
           ,
           c
          
         
        
       
      
      
       m
       ⁢
       
        C
        p
       
      
     
    
   
  
 

where m is a mass of the first and second secondary batteries; Cp is a specific heat at constant pressure of the first and second secondary batteries; V1 and OCV1 are a terminal voltage and an open circuit voltage (“OCV”) of the first secondary battery; V2 and OCV2 are a terminal voltage and an OCV of the second secondary battery; T1 is the first temperature of the first temperature measurement point, Tcoolant is the second temperature of the second temperature measurement point, and T2,estimate is the third temperature of the temperature estimation point; R1,c is a first thermal resistance between the first temperature measurement point and the second temperature measurement point, R12 is a second thermal resistance between the first temperature measurement point and the temperature estimation point and R2,c is a third thermal resistance between the temperature estimation point and the second temperature measurement point and I1 and I2 are charging currents of the first and second secondary batteries, respectively.