A method and device for thermal management of a battery system

Abstract

The present invention proposes a battery system thermal management method and device, wherein the method includes: the method obtains status information of several battery strings in the battery system by controlling the working status of the fan corresponding to the battery pack that needs thermal operation, wherein the The state information includes temperature information of each battery string; a thermal operation command is generated according to the temperature information of the battery string; and a cooling device corresponding to the battery string is controlled to cool the battery packs in the battery string according to the thermal operation command. On the one hand, it achieves the optimization of the control of the cooling device and realizes the maximum utilization of the life of the cooling device; on the other hand, it does not need to turn on several cooling devices at the same time, and will not affect the stability of the battery system due to the large instantaneous impact current.

Description

technical field [0001] The invention belongs to the technical field of battery management of a track energy feed system, and in particular relates to a method and device for thermal management of a battery system. Background technique [0002] As the market demand for the capacity of energy storage containers in rail energy feed-in systems increases, more and more battery packs need to be dissipated in energy storage containers. However, due to the different layouts of battery packs in energy storage containers, the heat dissipation conditions are also different. In the prior art, several fans are usually collectively controlled, that is, several fans are controlled to be turned on / off at the same time. On the one hand, the optimization of fan control cannot be achieved, in other words, the maximum utilization of the life of the fans cannot be realized; on the other hand, several When the fans are turned on at the same time, a large instantaneous inrush current will be gener...

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Problems solved by technology

[0002] As the market demand for the capacity of energy storage containers in rail energy feed-in systems increases, more and more battery packs need to be dissipated in energy storage containers. However, due to the different layouts of battery packs in energy storage containers, the heat dissipation conditions are also different. In the prior art, several fans are usually collectively controlled, that is, several fans are controlled to be turned on / off at the same time. On the one hand, the optimization of fan control cannot be achieved, in other words, the maximum utilization of the life of the fans cannot be realized; on the other hand, several When the fans are turned on at the same time, a large instantaneous inrush current will be generated, which may easily cause the switching power supply protection action in the energy storage container, resulting in the situation that the switching power supply no longer supplies power to the fan, which affects the stability of the battery system in the energy storage container.

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