Battery cooling system

Abstract

To provide a battery cooling system that can reduce variations in the degradation of multiple batteries. [Solution] The battery cooling system of the present invention is a battery cooling system comprising a cooling circuit through which a cooling fluid circulates for cooling a plurality of batteries arranged along a first direction, wherein the cooling circuit comprises a cooler extending along the first direction and cooling the plurality of batteries, a fluid delivery device that delivers the cooling fluid and circulates it in the cooling circuit, and a fluid cooling device that cools the cooling fluid, wherein the system comprises a deterioration estimation means for estimating the deterioration state of end batteries among the plurality of batteries that are located at the ends in the first direction and are located on the outlet side of the cooling fluid in the cooler, and a circulation direction changing means for changing the circulation direction of the cooling fluid flowing through the cooling circuit so as to switch between the inlet side and the outlet side of the cooling fluid in the cooler according to the deterioration state of the end batteries estimated by the deterioration estimation means.

Claims

1. A battery cooling system comprising a cooling circuit through which a cooling fluid circulates for cooling a plurality of batteries arranged along a first direction, The aforementioned cooling circuit includes: A cooler extending along the first direction and positioned opposite the plurality of batteries, through which a cooling fluid flows along the first direction to cool the plurality of batteries, A liquid supply device that delivers the cooling fluid and circulates it in the cooling circuit, A fluid cooling device for cooling the cooling fluid circulating in the cooling circuit, It is arranged as follows: A deterioration estimation means for estimating the deterioration state of an end battery among the plurality of batteries that is located at the end in the first direction and on the outlet side of the cooling fluid in the cooler, A circulation direction changing means for changing the circulation direction of the cooling fluid flowing through the cooling circuit so as to switch between the inlet side and outlet side of the cooling fluid in the cooler, according to the deterioration state of the end battery estimated by the deterioration estimation means, A battery cooling system characterized by comprising the following features.

2. The fluid outlet, which is the outlet of the cooling fluid in the fluid cooling device, and the first port, which is the inlet of the cooling fluid in the liquid supply device, are connected by a first pipe. The second port, which is the first inlet and outlet of the cooling fluid in the liquid transfer device, and the first fluid inlet and outlet, which is the first inlet and outlet of the cooling fluid in the cooler, are connected by a second pipe. The second fluid inlet / outlet, which is the second inlet / outlet for the cooling fluid in the cooler, and the third port, which is the second inlet / outlet for the cooling fluid in the liquid supply device, are connected by a third pipe. The fourth port, which is the outlet of the cooling fluid in the liquid supply device, and the fluid inlet, which is the inlet of the cooling fluid in the fluid cooling device, are connected by a fourth pipe. The flow path through which the cooling fluid flows, provided within the liquid delivery device, is configured to be selectively switchable between a first flow path state in which the first port and the second port are connected, and the third port and the fourth port are connected, and a second flow path state in which the first port and the third port are connected, and the second port and the fourth port are connected. The circulation direction changing means switches between the first flow path state and the second flow path state according to the deterioration state of the end battery. The battery cooling system according to feature 1.

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