Battery module

Abstract

The invention provides a battery modle which prevents temperature nonuniformity at each battery cell and improves the mountability of a thermistor, wherein the temperature nonuniformity is caused by the thermistor mounted on the rack between multiple battery cells. The thermistor supporter (12i) for holding the thermistor (22) on the rack (12) is arranged opposite to the bottom face (11d) of the battery cell (11). Therefore a cooling medium flowing in from one side of the pair of side surfaces (11b) of each battery cell (11) flows along the pair of main cooling surfaces (11a) and subsequently flows out from the other side of the pair of side surfaces (11b). Accordingly, the cooling medium is less likely to interfere with the thermistor supporter (11i) of the holder (12). Thus, even with the multiple holders (12) having the same shape, a difference in a leakage of cooling air between the thermistor supporter (12i) of the holder equipped with the thermistor (22) and the thermistor supporter of the holder without the thermistor is prevented, thereby achieving a uniformly cooled state of the battery cells (11) as well as a longer lifespan thereof. Moreover, when the thermistor (22) is inserted into the thermistor supporter, the elastic claw expands after passing the thermistor receiving segment so as to engage with the thermistor engagement segment (12i). Therefore the thermistor (22) can be fixed in a simple and reliable way.

Description

technical field [0001] The present invention relates to a battery module, the battery module includes: a plurality of battery units, the battery unit has a top surface, a bottom surface, a pair of main cooling surfaces and a pair of side surfaces, and the plurality of battery units are cooled by the main cooling a plurality of brackets of the same shape are sandwiched between the main cooling surfaces of the plurality of stacked battery cells; a thermistor is connected to the plurality of battery cells. At least one of the two battery cells is inserted and held in the thermistor holding part of the bracket, and the cooling medium flowing in from one side of the pair of side surfaces flows along the pair of main cooling surfaces. After that, it flows out from the other side of the pair of sides. Background technique [0002] In the following patent document 1, it is known that a plurality of battery cells are stacked with separators (frames) interposed between them, and the ...

AI Technical Summary

Problems solved by technology

As a result, the cooling medium flowing along the separator leaks from the open opening window, or conversely, the excess cooling medium is sucked along the separator from the open opening window, so that the battery cells in contact with the separator equipped with the temperature sensor, Temperature unevenness occurs between battery cells that are in contact with a separator that is not equipped with a temperature sensor, which may cause a decrease in the life of the battery cell

[0006] In addition, in the invention described in the above-mentioned Patent Document 1, since the sensor holder including the temperature sensor is fixed to the partition plate with bolts, the fixing operation is troublesome and there is a problem that the assemblability deteriorates.

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