A device for voltage and temperature measurement of a lithium battery pack

Abstract

The invention provides a device for measuring voltage and temperature of a lithium battery pack. The device comprises an upper computer and a base board which are connected. The base board is provided with a plurality of board grooves, and one board groove corresponds to one station address. At least two board grooves are respectively provided with a temperature measuring board, and the rest of the board grooves are respectively provided with a voltage measuring board. Each temperature measuring board comprises sixteen paths of temperature measuring circuits and one first single chip microcomputer. Each voltage measuring board comprises sixteen paths of voltage measuring circuits and one second single chip microcomputer. For each temperature measuring board, the first single chip microcomputer stores collected sixteen voltage values; for each voltage measuring board, the second single chip microcomputer stores collected sixteen temperature values. The upper computer is in communication with the single chip microcomputers of the measuring boards through an interface RS485, searches collection data of the corresponding measuring boards through the station addresses and processes the collection data. According to the device for measuring the voltage and the temperature of the lithium battery pack, the lithium battery pack can be measured rapidly, efficiency is improved and cost is lowered.

Description

technical field [0001] The invention relates to the technical field of lithium battery pack testing, in particular to a device for measuring the voltage and temperature of the lithium battery pack. Background technique [0002] Electric vehicle batteries are composed of multiple cells connected in parallel and then connected in series, and the number of cells connected in series can reach up to 180. Ideally, the voltages of these series-connected cells should be consistent, otherwise the utilization rate of the battery pack will be affected. It is impossible to achieve consistency in the actual operation process, but a certain error can be allowed. At this time, corresponding equipment is required to measure the voltage of each string of cells. After the voltage measurement of the cells connected in series, if the error is not exceeded, then Yes, as a basis for judgment. The existing measurement method is: artificially use a multimeter to test one after another, which take...

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