Battery packs, vehicles and energy storage

Abstract

The application discloses a battery pack, a vehicle and an energy storage device. The battery pack includes: a battery pack case and a plurality of rectangular single batteries, the case has a first direction and a second direction perpendicular to the first direction; the battery pack is arranged along the second direction. The dimension in one direction is ≥ 600 mm, at least one rectangular battery containing unit is formed in the casing; a plurality of rectangular single batteries are arranged in the rectangular battery containing unit along the second direction; the rectangular single batteries extend along the first direction, and Each rectangular battery containing unit is provided with a rectangular single battery in the first direction; the thickness of the rectangular single battery is D, the length is L, and the height is H; the size of the battery pack along the first direction is greater than or equal to L ; The length direction of at least one rectangular single battery extends along the first direction, and satisfies: L>H, L>D, 600mm≤L≤2500mm, 23≤L / D≤208. The battery pack provided by the present application has high volume utilization rate and low cost.

Description

[0001] Cross References to Related Applications [0002] This application claims the priority of the Chinese patent application numbers "201910021244.0", "201910020967.9", "201910021246.X", "201910021248.9", "201910021247.4" and "201910020925.5" submitted by BYD Co., Ltd. on January 9, 2019. The entire contents are incorporated by reference in this application. technical field [0003] The present application belongs to the technical field of vehicle manufacturing, and in particular, relates to a battery pack, a vehicle with the battery pack, and an energy storage device with the battery pack. Background technique [0004] In the related art, such as a power battery pack applied to an electric vehicle, it mainly includes a package body and a plurality of battery modules installed in the package body, wherein each battery module group is assembled from a plurality of single cells. [0005] In the above related prior art, such as figure 1 As shown, the package body of the po...

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Problems solved by technology

[0007] As the user's requirements for the battery life of the electric vehicle gradually increase, and in the case of limited space at the bottom of the vehicle body, the power battery pack provided by the above-mentioned prior art embodiment, the end beam, the side beam of the battery module 400a, and the power battery The connection and installation methods inside the package reduce the utilization rate of the internal space of the package body 200; in the power battery pack, the ratio of the volume of the single cells to the volume of the package body 200 is too low, and its energy density cannot meet the above requirements has gradually become an important factor restricting the development of electric vehicles

In addition, there is a cumbersome assembly process, and the assembly process is complicated. It needs to be assembled into a battery module first, and then the battery module is installed in the package, which increases the cost of manpower and material resources. During the assembly process, the probability of defective rate is increased. Multiple assembly increases the possibility of loosening and insecure installation of the power battery pack, which will have a negative impact on the quality of the power battery pack, and the stability of the power battery pack will decrease. , the reliability decreases

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