Battery pack equalizing device with radiating function

Abstract

The invention discloses a battery pack equalizing device with a radiating function. The battery pack equalizing device comprises a direct current / direct current conversion module, a detection control module, a plurality of double-pole relays, a radiating fan and a battery pack, wherein two common ends of each double-pole relay are respectively connected with an anode and a cathode of an input end of the direct current / direct current conversion module; two normally-closed ends of each double-pole relay are opened; two normally-open ends of each double-pole relay are respectively connected to the anode and the cathode of each single battery in the battery pack; an output end of the direct current / direct current conversion module is connected with the radiating fan; and the detection control module is connected to the anode and the cathode of each single battery in the battery pack through a voltage detection flat cable. The battery pack equalizing device with the radiating function has the advantages that: by discharging a single battery with the highest voltage in the battery pack through the fan, equalized heating cannot be caused, the radiating function of the battery pack can be realized, equalizing current can be freely regulated, and the equalizing current can be increased by improving the output power of the direct current / direct current conversion module and the power of the fan.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a battery pack equalization device with heat dissipation function. Background technique [0002] Power lithium batteries have been widely used in electric vehicles, energy storage and other fields in recent years. In order to meet the power requirements of use, power lithium batteries need to be used in series and parallel groups. Taking electric vehicles as an example, the battery pack of a pure electric bus needs about 8,000 10AH single lithium batteries to be combined in series and parallel. Due to the limitations of the manufacturing process, it is difficult for the single lithium battery to be completely consistent. During use, if the inconsistency of the single battery is not dealt with in time, the performance of the battery pack will be severely degraded and eventually cannot be used. At present, the commonly used method to solve the inconsistency of single cells...

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Problems solved by technology

[0004] The present invention proposes a lithium battery pack equalization device with heat dissipation function in view of the deficiencies of the prior art. The heat dissipation fan is used to replace the bypass resistor, which will not cause heat generation due to equalization, and also solves the problem that the equalization current is small and the equalization effect is not obvious. The problem

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