Temperature control assembly and battery pack

Abstract

The invention provides a temperature control assembly and a battery pack. The temperature control assembly comprises a first side plate, a second side plate and a first buffer plate. The first side plate is provided with a first limiting protrusion which is located in a projection area of the first buffer plate on the first side plate. The second side plate is provided with a second limiting protrusion which is located in the projection area of the first buffer plate on the second side plate. In the using process of the battery pack, batteries can generate an expansion force, and due to inclined arrangement of the first buffer plate, the first buffer plate is easy to bend and deform under the action of the expansion force so as to timely absorb the expansion force of the batteries so thatthe temperature control assembly is ensured to meet the expansion force requirement of the batteries. In the bending deformation process of the first buffer plate, the first buffer plate abuts againstthe first limiting protrusion and the second limiting protrusion so that bending deformation of the first buffer plate is limited, the temperature control assembly still has a ventilation space meeting a thermal management requirement, and the thermal management performance of the temperature control assembly on the batteries is improved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a temperature control component and a battery pack. Background technique [0002] A battery pack typically includes multiple batteries grouped together. In group technology, in addition to ensuring the strength and performance of the structure itself, it is also necessary to consider the impact of the structure on battery life, in which temperature and expansion force have a great impact on battery life, so thermal management and expansion force design must be considered in design. [0003] In terms of thermal management design: At present, there are mainly two ways of water cooling and air cooling. Among them, due to the high cost of the water cooling method, the battery pack generally adopts the air cooling method for heat dissipation. [0004] In terms of expansion force design: During the charging and discharging process of the battery pack, the battery will gradually exp...

AI Technical Summary

Problems solved by technology

Among them, an appropriate expansion force will be beneficial to the battery's own reaction, but an excessive expansion force will cause the battery to be overstressed and cause lithium precipitation, and even cause irreversible capacity loss, which greatly reduces the battery life.

[0005] In order to alleviate the expansion force, there are mainly the following forms: (1) The batteries are directly attached to each other and the external structure is strengthened to directly resist the expansion force. The disadvantage of this method is: when the battery capacity and the battery string When the number gradually increases, the expansion force after the batteries are grouped will become larger and larger, thereby reducing the service life of the battery; The disadvantage of this method is that: the large surface of the battery is close to the cushion pad, and only the side and bottom of the battery can be used to dissipate heat, thereby reducing the heat dissipation efficiency; (3) the battery is separated from the battery, and the middle space The gap is opened to allow the battery to expand freely. The disadvantage of this method is that the battery expands freely at the beginning, and it is easy to react insufficiently without pressure, which reduces the service life. When it is too large, it will affect the group volume

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