Power battery pack, energy storage device and electric vehicle

Abstract

The invention relates to a power battery pack, an energy storage device and an electric vehicle. The power battery pack comprises an accommodating device (200) and a plurality of single batteries (100) arranged in the accommodating device (200); the accommodating device (200) comprises a first frame (201) and a second frame (202) which are oppositely arranged in the first direction (A1). The plurality of single batteries (100) are arranged between the first frame (201) and the second frame (202); the length of each single battery (100) in the first direction (A1) is L1, the distance between the inner surface of the first frame (201) and the inner surface of the second frame (202) in the first direction (A1) is L2, and L1 / L2 is larger than or equal to 50%. According to the technical scheme,only one single battery is arranged in the first direction, so that the single battery can play a role of a cross beam and / or a longitudinal beam, and the volume utilization rate of the accommodatingdevice is increased.

Description

technical field [0001] The present disclosure relates to the technical field of power battery packs, and in particular, to a power battery pack, an energy storage device, and an electric vehicle. Background technique [0002] In the prior art, the power battery pack mainly includes a receiving device and a plurality of battery modules installed in the receiving device. The battery module is mainly assembled from a plurality of single cells. The beams are arranged around the base plate. In order to make the receiving device have sufficient strength and facilitate the installation of the battery module, a plurality of crossbeams and longitudinal beams are usually arranged between the side beams, and the plurality of crossbeams, longitudinal beams, side beams and the bottom plate jointly define a plurality of There are multiple accommodation spaces for the battery modules, and each battery module is arranged in a corresponding accommodation space. [0003] The above-mentioned...

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Problems solved by technology

[0004] 1. Due to the existence of beams and longitudinal beams, the volume utilization rate of the storage device is low, about 40%, and the number of single batteries that can be installed is limited, which cannot effectively improve the battery life of the power battery pack;

[0005] 2. The traditional power battery pack contains many battery modules. During the assembly process, each battery module needs to be fixed to the beam, and a large number of screws and other fasteners are required to fasten the modules. At the same time The beam or stringer has a certain weight, resulting in an increase in the weight of the containment device;

[0006] 3. Beams and longitudinal beams are arranged in the containment device, and the structure is complex, which increases the complexity of the manufacturing process of the containment device;

[0007] 4. The single battery needs to be assembled into a battery module and then placed in the storage device. The operation steps are complicated. If the single battery is directly placed in the storage device, the beams and longitudinal beams in the storage device will easily collide with the single battery. damage the single battery

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