Power battery box having end plate-free battery modules

Abstract

The invention discloses a power battery box having an end plate-free battery module. The power battery box comprises: a shell assembly comprising a shell body; a plurality of battery modules positioned in the shell body; and a fixing assembly arranged on the battery modules and connected with the shell body in order to make the battery modules fixed to the shell body. The power battery box adoptsthe cooperation of the battery modules with the fixing assembly, so a reliable structure caused by loose packaging of battery cells is avoided; the defects of high technology difficulty and maintenance inconvenience caused by integral gluing of the battery cells and the shell body are avoided; and there is no need to arrange an end plate on every battery module, and the battery modules are fixed by using the fixing assembly, so the space is saved to a certain degree, and the energy density of the power battery box is improved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a power battery box with an endless battery module. Background technique [0002] With the improvement of people's living standards, people's demand for cars is increasing. But at the same time, the problems of global environmental pollution and oil shortage are becoming more and more serious. Mineral energy sources such as traditional oil, gas and gas will soon be depleted, and the oil situation is very serious. It is against such a background that hybrid electric vehicles / electric vehicles (HEV / EV) emerge as the times require. As the main power source of HEV / EV, lithium batteries have gradually replaced lead-acid batteries and nickel-metal hydride batteries due to their advantages such as high specific energy, long cycle life, no pollution, and no memory effect, and are used in electric vehicles, backup power supplies, etc. field. [0003] Because large vehicles such as e...

AI Technical Summary

Problems solved by technology

[0005] At present, there are roughly the following designs for power battery boxes: (1) Modules with end plates are put into the box, which has the following disadvantages: first, the end plates occupy the space of the power battery box and affect the volumetric energy density; second, the weight of accessories such as end plates is relatively heavy. Large, reducing the energy density of the entire power battery box

(2) No-module form, that is, simply bulk-pack the battery cells into boxes and press them to fix them, which has the disadvantages of being weak and poor in safety

(3) The battery cell and the outer shell are fixed by integral glue, which has the advantage of high overall strength, but this grouping method has high requirements on the performance of the single battery cell and the technical requirements of the battery group PACK. When a single battery cell appears In case of failure, the entire power battery box needs to be replaced and repaired, which will cause a substantial increase in the entire after-sales maintenance cost

These shortcomings restrict the rapid promotion and application of power battery systems in the new energy industry

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