Fully closed liquid-cooled battery pack

Abstract

The invention relates to a fully closed liquid-cooled battery pack which comprises an outer box body, a plurality of batteries and a control unit, wherein an inner heat exchanger is clamped between every two batteries, the inner heat exchangers are plate type, each inner heat exchanger comprises a plurality of heat exchanger pipelines, air holes of the heat exchanger and two heat exchanger contact panels, the air holes of each heat exchanger and the corresponding heat exchanger pipelines are horizontally arranged at intervals, a diversion cover is arranged at one end of each inner heat exchanger, where the air holes of the heat exchanger are located, and a fan is arranged on each diversion cover; the heat exchanger pipelines on each inner heat exchanger are connected in series and have one inlet and one outlet; the inlets and the outlets of the heat exchanger pipelines of all the inner heat exchangers are connected in parallel, the inlets are connected with an outer heat exchanger outside the box body, the outlets are connected with a liquid storage tank, and the liquid storage tank is connected with the outer heat exchanger through a liquid circulating pump. The fully closed liquid-cooled battery pack can realize the temperature control of the battery pack under the fully closed state, ensure that the battery pack works in the optimal temperature range, and simultaneously ensure the fully closed performance of the battery pack, thereby being an optimal battery placement scheme of electric vehicles.

Description

technical field [0001] The invention relates to a vehicle-mounted battery pack, in particular to a fully enclosed liquid-cooled battery pack. Background technique [0002] At present, there are three main arrangements for the on-board battery packs on electric vehicles in the field of new energy technology: 1. Arranged on the chassis of the vehicle body. In this way, the center of gravity of the vehicle is lower, and the vehicle runs smoothly and is not easy to roll over. The box is equipped with a closed structure. 2. It is arranged in the middle of the vehicle body (such as the middle of the vehicle body above the wheels). In this way, the center of gravity of the vehicle is slightly moved up, which has little impact on the driving safety of the vehicle. 3. It is arranged on the top of the vehicle body. In this way, the center of gravity of the vehicle is too high, and the vehicle is unstable and requires strict restrictions on road conditions and vehicle speed, otherwise...

AI Technical Summary

Problems solved by technology

However, the vehicle-mounted battery pack arranged on the chassis of the vehicle body, due to its low position, is more likely to be flooded and flooded than the latter two, which requires the outer box of the vehicle-mounted battery pack to have a fully enclosed structure to prevent flooding; this is the same as The heat dissipation or heat preservation of the on-board battery becomes a contradiction. If it is necessary to ensure that the operating temperature of the fully enclosed on-board battery pack is within the specified range, simple cooling of the outer shell is not enough, and the heat exchange method of circulating air is not enough.

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