Electric automobile battery heat preservation structure

Abstract

The invention discloses an electric automobile battery heat preservation structure. A battery comprises an outer shell, a battery module arranged in the outer shell, a liquid cooling water pipe set arranged on the lower side of the battery module and connected with a cooling source through a water inlet pipe connector and a water outlet pipe connector, and a supporting beam used for supporting thebattery module is arranged on the edge of the bottom of the outer shell. The liquid cooling water pipe set comprises liquid cooling water pipes arranged side by side and reinforcing components used for improving the bending strength of the liquid cooling water pipes, the upper side of the liquid cooling water pipe set is tightly attached to the lower side face of the battery module, a heat insulation gap is formed between the lower side of the liquid cooling water pipe set and the outer shell, and each reinforcing component comprises a supporting protrusion attached to the supporting beam. The heat insulation effect between the liquid cooling water pipe and the outer shell can be effectively improved, heat conduction between the liquid cooling water pipe and the outer shell is avoided, tight attachment between the liquid cooling water pipe and the battery module can be ensured, and therefore the heat preservation effect on the battery is improved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle manufacturing, and in particular relates to an electric vehicle battery heat preservation structure. Background technique [0002] For electric vehicles, the lithium-ion battery is a key component, and the lithium-ion battery powering the vehicle usually includes a metal outer casing and a battery module arranged in the outer casing. We know that lithium-ion batteries will generate heat during charging and discharging, and lithium-ion batteries are more sensitive to ambient temperature. The suitable operating temperature of lithium-ion batteries is generally 0°C~45°C. Too low a temperature will lead to a decrease in discharge capacity. If the temperature is too high, the battery will short-circuit and cause an explosion. For this reason, people usually set up corresponding insulation structures for lithium-ion batteries. When the battery temperature is low, the battery will be heated; wh...

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Problems solved by technology

[0005] However, the above structure still has the following defects: First, because the insulation cotton material has certain elasticity, that is to say, the insulation cotton can provide elastic support for the liquid-cooled water pipe

Limited by the elasticity of the insulation cotton, when the liquid-cooled water pipe has a certain arc bending deformation, the insulation cotton cannot effectively lift the liquid-cooled water pipe, that is to say, the insulation cotton cannot "straighten" the liquid-cooled water pipe Therefore, it is impossible to ensure that the liquid cooling water pipe is always tightly attached to the battery module

Secondly, although the thermal insulation cotton has a good heat insulation effect, since the thermal insulation cotton and the liquid-cooled water pipe and the bottom wall of the outer shell are fully bonded and contacted at the same time, the thermal insulation cotton will still pass between the liquid-cooled water pipe and the outer shell. Generate a certain amount of heat transfer, thus affecting the overall thermal insulation effect of the thermal insulation structure

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