Thermal management system for battery pack, and battery pack

Abstract

The invention relates to a thermal management system for a battery pack, and the battery pack, belonging to the technical field of thermal management of batteries. The objective of the invention is torealize separate temperature adjustment of a plurality of battery modules via the thermal management system. According to a main technical scheme in the invention, the thermal management system for the battery pack comprises a main liquid circulation pipeline, which is internally provided with a circulation water pump, a heater and a radiator; a plurality of branch liquid circulation pipelines, which are successively arranged between the outlet and the inlet of the main liquid circulation pipeline and are connected with each other in parallel; a plurality of flow control valves, which are separately arranged in the plurality of branch liquid circulation pipelines; and a plurality of heat exchangers, which are respectively connected with the plurality of branch liquid circulation pipelinesand are respectively connected with a plurality of battery modules for thermal adjustment of the battery modules. The thermal management system for the battery pack can be used for separate temperature adjustment of a plurality of battery modules at the same time.

Description

technical field [0001] The invention relates to the technical field of battery thermal management, in particular to a battery pack thermal management system and the battery pack. Background technique [0002] Usually the battery pack used in electric vehicles contains only one battery module, but in order to meet the needs of electric vehicles and integrate all batteries in electric vehicles, technicians have developed a battery pack containing multiple battery modules battery pack. [0003] However, for a battery pack composed of multiple battery modules, since the power output or input of each battery module may be different, there will be inconsistent heating of multiple battery modules. When the temperature of one of the battery modules Too high will inevitably affect the temperature of the entire battery pack, and it is also very easy to cause problems such as temperature imbalance of multiple battery modules. [0004] However, the thermal management system used to ad...

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Problems solved by technology

[0003] However, for a battery pack composed of multiple battery modules, since the power output or input of each battery module may be different, there will be inconsistent heating of multiple battery modules. When the temperature of one of the battery modules Too high will inevitably affect the temperature of the entire battery pack, and it is also very prone to problems such as temperature imbalance of multiple battery modules

[0004] However, the thermal management system used to adjust the temperature of the battery pack in the prior art usually adjusts the overall temperature in the battery pack, which cannot be adjusted for each battery module. The temperature of the battery pack is too high, and the temperature of individual battery modules is too low, etc., so that the working status of multiple battery modules is inconsistent, the life of the battery modules is affected, and even thermal runaway occurs

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