Fluid-cooled heat sink and embedded fluid-cooled heat sink type lead-acid storage battery

Abstract

The invention discloses a fluid-cooled heat sink and an embedded fluid-cooled heat sink type lead-acid storage battery. The embedded fluid-cooled heat sink type lead-acid storage battery comprises a storage battery main body, a separator and a fluid-cooled heat sink body, wherein the separator is arranged inside the storage battery main body; the fluid-cooled heat sink body is arranged in the separator; a plurality of fluid flow channels used for circulating fluid and an aluminum tube serving as the water inlet / outlet of the fluid flow channels are arranged on the fluid-cooled heat sink body;the aluminum tube is positioned at the bottom of the storage battery main body; the fluid-cooled heat sink body is parallel to the polar plate surface on the storage battery main body; the fluid-cooled heat sink body is isolated from acid liquor in the lead-acid storage battery by virtue of an insulating layer in the separator.

Description

technical field [0001] The invention relates to a liquid-cooled heat sink and a lead-acid battery embedded with the liquid-cooled heat sink, belonging to the technical field of lead-acid batteries. Background technique [0002] The invention relates to lithium battery heat management technology. Lithium batteries include hard square lithium batteries, soft-pack lithium batteries, and cylindrical lithium batteries; liquid-cooled heat sinks also refer to liquid-cooled heat dissipation. The liquid substance in the battery corresponds to air cooling, which belongs to the active high-efficiency heat dissipation technology; heat dissipation refers to cooling and heating, which can control the temperature of the battery so that it can work at a suitable temperature. [0003] At present, the thermal management of lithium batteries is divided into: natural cooling, air-cooled heat dissipation and water-cooled heat dissipation; natural cooling does not have any heat dissipation compon...

AI Technical Summary

Problems solved by technology

[0009] The performance of lead-acid batteries is greatly affected by the ambient temperature. When the ambient temperature is high, the battery temperature is 40°C, and the battery is continuously charged for 500 hours, and the water loss is at most 1g / AH. In an environment of 75°C, under the same conditions, the water loss can reach 4g / AH. AH, taking the 60AH of an ordinary car as an example, the water loss of each battery after charging reaches 240g, which is 4 times the water consumption at 40°C, and the life of the battery is significantly reduced.

[0010] The charging and discharging efficiency is low in low temperature environment, which makes it difficult to start the car. Generally, the resistance of sulfuric acid with a concentration of 25% is 160.6×10 at +10°C. 4 Ω·m, and at -10°C, the resistance increases to 250×10 4 Ω·m, while the viscosity increases from 2.01 to 3.82, resulting in a 30% drop in battery charge and discharge capacity, and the capacity drops to 60% at -20°C

[0011] Some vehicles put the battery in the trunk to control the battery temperature, but the line is long, the cost is high, and the voltage decays; in the communication field, in order to meet the long-life requirements, air-conditioning equipment is usually equipped to cool the lead-acid battery, but the efficiency is low

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