Combined connection structure for power battery pack

Abstract

The invention provides a combined connection structure for a power battery pack. The combined connection structure for the power battery pack is simple in structure, good in stability, good in heat dissipation effect and good in reliability. The combined connection structure comprises single batteries which are regularly arranged; the combined connection structure is characterized by also comprising metal connection plates, which are arranged at the upper ends and the lower ends of the single batteries; metal fixed sleeves which are matched with the shapes of the single batteries are arranged on the metal connection plates; positive terminals and negative terminals of the single batteries are inserted into the metal fixed sleeves respectively; and positive poles and negative poles of the single batteries are in contact with the metal connection plates respectively, so that series-parallel connection of the single batteries is achieved.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to a combined connection structure of a power battery pack. Background technique [0002] The power battery is a key component in an electric vehicle, and its performance will directly affect the performance of the vehicle. In order to achieve higher energy density and power density for battery packs or battery modules provided by the prior art, current large-capacity power battery packs generally connect multiple single cells in parallel to meet capacity requirements. Then connect them in series to meet the voltage requirements, so as to meet the power requirements of electric vehicles. [0003] When the number of single cells in the power battery pack is large, the heat dissipation of the battery pack during use becomes a problem. The existing connection and fixing devices for combining and connecting single cells are usually made of plastic, and the heat dissipation effect of p...

AI Technical Summary

Problems solved by technology

[0003] When the number of single cells in the power battery pack is large, the heat dissipation of the battery pack during use becomes a problem. The existing connection and fixing devices for combining and connecting single cells are usually made of plastic, and the heat dissipation effect of plastic materials Poor, the accumulation of heat will have a negative impact on the normal use of the battery pack; in addition, the existing structure of the power battery pack still needs to be equipped with electrode connecting pieces to connect the single cells, which complicates the structure of the power battery, and the car is moving. Under the circumstances, it is required that each battery cell of the power battery module should have good stability. The plastic structure of the existing power battery pack has poor stability, and there are certain potential safety hazards. In particular, damage to the plastic connection structure caused by vibration and friction will cause The open circuit or even short circuit of the battery module will cause heat and fire, and the plastic structure has poor explosion-proof performance and low safety factor in the event of an accident.

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