Battery power source device

A battery power source device comprising:

• a battery pack having battery modules formed by connecting in series electrically and mechanically a plurality of single cells in the form of secondary cells, said battery modules being elongated in a longitudinal direction;
• said battery modules being held in a holder case in a three-dimensionally parallel arrangement and being electrically connected in series;
• cooling means for forcing coolant to flow in a direction orthogonal to the longitudinal direction of said battery modules;
• temperature detection means for detecting a temperature of one of said battery modules arranged in parallel to a direction orthogonal to the direction of the coolant flow;
• and
• means for calculating a temperature of another one of said battery modules arranged parallel to said one of said battery modules based on the temperature detected of said one of said battery modules by using a predetermined temperature distribution characteristic of said battery pack.

A battery power source device comprising:

• a battery pack having battery modules formed by connecting in series electrically and mechanically a plurality of single cells in the form of secondary cells, said battery modules being elongated in a longitudinal direction;
• said battery modules being held in a holder case in a three-dimensionally parallel arrangement and being electrically connected in series;
• cooling means for forcing coolant to flow in a direction orthogonal to the longitudinal direction of said battery modules;
• temperature detection means for detecting a temperature of one of said battery modules;
• and
• means for calculating a temperature of another one of said battery modules based on the temperature detected of said one of said battery modules and a predetermined temperature distribution characteristic of said battery pack.

A battery power source device comprising:

• a battery pack having battery modules that are interconnected and elongated in a longitudinal direction;
• a holding casing containing said battery modules;
• cooling means for forcing coolant to flow in a direction orthogonal to the longitudinal direction of said battery modules;
• temperature detection means for detecting temperature of a first one of said battery modules at an upstream position of the coolant flow and temperature of a second one of said battery modules at a downstream position of the coolant flow;
• and
• means for calculating temperature of ones of said battery modules at positions other than the upstream position and the downstream position based on the detected temperature of said first one and said second one of said battery modules and in accordance with a predetermined temperature distribution characteristic of said battery pack.

A battery power source device comprising:

• a battery pack having battery modules that are interconnected and elongated in a longitudinal direction;
• a holding casing containing said battery modules;
• cooling means for forcing coolant to flow in a direction orthogonal to the longitudinal direction of said battery modules;
• temperature detection means for detecting a temperature of one of said battery modules;
• and
• means for calculating a temperature of another one of said battery modules based on the temperature detected of said one of said battery modules by using a predetermined temperature distribution characteristic of said battery pack.