Temperature detection device for lithium battery pack

Abstract

The invention provides a temperature detection device for a lithium battery pack. The temperature detection device comprises a detection group, wherein the detection group comprises a plurality of detection units; each detection unit comprises a circuit substrate; a bus-type temperature sensor, a voltage measurement connection device and a temperature bus connector are arranged on the circuit substrate; and each detection unit is arranged on a positive tab of each lithium battery of requiring temperature and voltage measurement. By a modular single-bus measurement method, the measurement circuit is simple and clear in wiring; and massive temperature signals of the battery pack can be conveniently collected. The temperature detection device comprises temperature sensors which are the same as lithium batteries in the lithium battery pack in number; the circuit substrate is reasonable in structural design and convenient to install; repeated disassembly is avoided; the measurement device is good in stability and accurate to measure; and the problem of collection of massive temperature signals of the battery pack can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of lithium battery detection, in particular to a temperature detection device for a lithium battery pack. Background technique [0002] In the actual application of industrial production sites, since the voltage of a single-cell lithium battery is 3.7V (3.2V for a lithium iron phosphate battery), and the battery capacity is relatively small, therefore, a single-cell lithium battery is often processed in series or in parallel. To meet the requirements of different occasions. As the actual demand grows, the size of the battery pack is also getting larger. Since the chemical reaction inside the battery is closely related to the temperature, the heat consumption rate of the battery (the amount of heat consumed per 1kW·h of electric energy generated) is different at different temperatures. If the battery temperature is not monitored and controlled, the battery temperature will rise significantly, resulting in t...

AI Technical Summary

Problems solved by technology

If the battery temperature is not monitored and controlled, the battery temperature will rise significantly, resulting in the formation of "hot spots" inside the battery pack, affecting the use of lithium batteries, and eventually thermal runaway may occur

Therefore, it is necessary to monitor the temperature of each lithium battery in the battery pack, and the large-scale battery pack brings great difficulties and heavy workload to the temperature measurement of the single lithium battery.

Images