Power battery pack

Abstract

A power battery pack consists of a plurality of storage batteries, wherein bulges are arranged on the outer surfaces of the terminals of each storage battery, the adjacent terminals of each two adjacent storage batteries are connected through the bulges on the outer surfaces of the storage batteries; a three-dimensional grid structure is formed by connecting all the bulges; the three-dimensional grid structure is used as the thermally conductive bridge of each storage battery to intensify heat exchange; all or part of the holes and gaps in the three-dimensional grid are communicated to form a criss-cross networked runner; the heat-exchange medium flows to the outer surface of each terminal through the networked runner to perform effective heat exchange to the power battery pack; the overlapped points and lines of the three-dimensional grid structure form electric connection points and electric connection bands between the terminals of the adjacent storage batteries; and the raised sharp tops are deformed under the pretightening force to be embedded mutually, thus the electric connection points and electric connection bands can form reliable contacts. The heat flow lines and current lines of the power battery pack can not gather, thus the electrical connection can be strengthened and the heat exchange problem can be solved so as to reduce the thermal resistance and the electric resistance.

Description

technical field [0001] The invention belongs to the technical field of electric energy storage, to be precise, belongs to the technical field of power batteries. Background technique [0002] The power battery generally refers to a battery with a single capacity exceeding 2Ah, which is used in power traction and high-power energy storage systems, and a power battery pack is a battery pack that uses a single battery (single power battery) and is connected according to regulations. [0003] Known power battery packs are generally connected to individual cells by means of bolt connection, welding wires, cables, and rows. The effective contact area with the battery terminals is small, resulting in a large connection resistance, and it is not easy to be consistent. Fast charging and discharging cannot be realized. [0004] Chinese patent 201019060011.8 (a cylindrical lithium-ion power battery and its preparation method) discloses a technical solution for a high-power battery, an...

AI Technical Summary

Problems solved by technology

[0005] The invention simply mentions punching outwardly protruding dots on the pole shell to enhance the contact between adjacent batteries; but this technical solution lacks practicality, because in actual production, the pole shell of the circular pie battery Affected by the deviation of the pole plate rolling, the stiffness (rebound) of the bare pole piece after being pressed down, and the precision of the pole shell processing, it is difficult to keep the plane of the contact position consistent, which is likely to cause inaccurate contact or Uneven distribution of effective contact area

[0006] This invention does not provide a more reliable and practical technical solution for the temperature control and electrical connection of the battery pack

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