A mine lithium battery module cooling device

Abstract

This utility model discloses a cooling device for a mining lithium battery module in the field of lithium battery thermal management technology, including a housing and battery cells. A partition is fixed inside the housing, dividing the interior into an upper heat dissipation cavity and a lower battery module cavity. An upper locking position is provided on the lower end face of the partition, and a bottom plate is provided at the bottom of the battery module cavity. A lower locking position is provided on the upper end face of the bottom plate, and a battery cell is installed between the upper and lower locking positions. The battery cell is covered with a phase change material thermally conductive layer, and a heat pipe is provided on the outside of the battery cell. The evaporation section of the heat pipe is in close contact with the phase change material thermally conductive layer, and the condensation section of the heat pipe passes through the partition and enters the heat dissipation cavity. A heat sink is connected above the condensation section. This utility model achieves efficient and leak-free heat dissipation through the synergistic operation of the phase change material thermally conductive layer and the heat pipe, while effectively avoiding the influence of dust, significantly improving the thermal management safety and environmental adaptability of the mining lithium battery module.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery thermal management technology, and in particular to a cooling device for a mining lithium battery module. Background Technology

[0002] In the mining industry, the application of lithium battery modules is becoming increasingly widespread, and their heat dissipation has become a major concern. Currently, existing technologies for cooling mining lithium battery modules mainly employ natural air cooling or simple liquid cooling structures. Natural air cooling relies on airflow to remove heat; however, in the underground mining environment, this method has low heat dissipation efficiency and is insufficient to meet the heat dissipation requirements of lithium battery modules operating under high loads. Moreover, the presence of large amounts of dust underground can easily clog the heat dissipation channels of the air cooling system, further deteriorating the heat dissipation effect.

[0003] While simple liquid cooling structures can improve heat dissipation efficiency to some extent, they also have significant drawbacks. Traditional liquid cooling systems are prone to coolant leakage, which directly affects the performance and lifespan of the battery module. More seriously, in the unique environment of underground mines, coolant leakage can trigger a series of safety issues, threatening safe production in the mining area. Therefore, it is essential to develop a safe, reliable, and highly efficient cooling device for mining lithium battery modules that can adapt to the complex underground environment. Utility Model Content

[0004] The main objective of this invention is to provide a cooling device for mining lithium battery modules to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A cooling device for a mining lithium battery module includes a housing with battery cells installed inside. A partition is fixed inside the housing, dividing the interior into an upper heat dissipation cavity and a lower battery module cavity. An upper locking slot is provided on the lower end face of the partition, and a bottom plate is provided at the bottom of the battery module cavity. A lower locking slot is provided on the upper end face of the bottom plate, and a battery cell is installed between the upper and lower locking slots. The battery cell is covered with a phase change material thermally conductive layer, and a heat pipe is provided on the outside of the battery cell. The evaporation section of the heat pipe is in close contact with the phase change material thermally conductive layer, and the condensation section of the heat pipe passes through the partition and enters the heat dissipation cavity. A heat sink is connected above the condensation section.

[0007] Furthermore, the phase change material thermal conductive layer adopts a paraffin-expanded graphite composite material.

[0008] Furthermore, the heat sink is an aluminum finned heat sink with fin thickness of 0.3mm and a spacing of 2mm.

[0009] Furthermore, the lower end of the heat dissipation fins of the radiator is fixedly connected to the condensation section of the heat pipe, and the upper end of the heat dissipation fins extends out of the casing through the top plate of the casing.

[0010] Furthermore, the heat pipe is an inverted U-shaped sintered copper heat pipe with an inner diameter of 3mm and a wall thickness of 0.5mm. The working medium inside the heat pipe is deionized water.

[0011] This utility model also includes other components that enable the cooling device for the mining lithium battery module to function normally. These devices or components all employ conventional techniques in the art. Furthermore, devices and components not specifically defined in this utility model all employ conventional techniques in the art, such as the heat sink described in this application. In specific implementation, appropriate device or component models can be selected according to the specific working scenario.

[0012] The working principle of this invention is as follows: Under normal operating conditions or low-rate discharge, the heat generated by the battery cell is first rapidly absorbed by the paraffin-expanded graphite composite phase change material thermal conductive layer wrapped around it, converting the heat into latent heat storage through the solid-liquid phase change process of the material. At this time, the evaporation section of the inverted U-shaped sintered copper heat pipe is in close contact with the phase change layer, but active heat dissipation has not yet started due to insufficient temperature difference. When under heavy load conditions or high-rate charge and discharge, the heat generation rate of the battery cell exceeds the heat absorption capacity of the phase change material. The accumulated heat causes a significant temperature difference between the evaporation section of the heat pipe and the phase change layer, activating the phase change cycle of the deionized working fluid inside the heat pipe. The heat is then conducted to the aluminum finned heat sink through the condensation section, and the heat dissipation fins extending to the outside of the casing achieve efficient heat dissipation through natural air convection.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Improved heat dissipation efficiency of lithium battery modules: Through the dual heat dissipation mechanism of paraffin-expanded graphite composite phase change material thermal conductive layer and inverted U-shaped sintered copper heat pipe, adaptive thermal management under different operating conditions is achieved, and the overall heat dissipation efficiency is improved by more than 50% compared with the traditional air cooling system.

[0015] 2. Eliminates the safety hazard of coolant leakage: The solid-state heat dissipation method, which uses latent heat storage of phase change materials and closed working fluid circulation in heat pipes, completely avoids the leakage risk of traditional liquid cooling systems and meets the safety and explosion-proof requirements of underground mines.

[0016] 3. Enhanced adaptability to dusty environments: The natural air convection structure of the aluminum finned heat sink avoids the dust accumulation problem caused by forced air cooling, and the layout of the heat sink extending outside the case ensures continuous and stable heat dissipation performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of a cooling device for a mining lithium battery module according to the present invention.

[0018] In the diagram: 1. Housing; 2. Partition; 21. Upper slot; 3. Heat dissipation cavity; 4. Battery module cavity; 5. Base plate; 51. Lower slot; 6. Battery cell; 7. Phase change material thermal conductive layer; 8. Heat pipe; 81. Evaporation section; 82. Condensation section; 9. Radiator. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Example:

[0021] like Figure 1 As shown, a cooling device for a mining lithium battery module includes a housing 1, in which a battery cell 6 is installed. A partition 2 is fixed inside the housing 1, dividing the interior of the housing 1 into an upper heat dissipation cavity 3 and a lower battery module cavity 4. An upper locking slot 21 is provided on the lower end face of the partition 2, and a bottom plate 5 is provided at the bottom of the battery module cavity 4. A lower locking slot 51 is provided on the upper end face of the bottom plate 5, and a battery cell 6 is installed between the upper locking slot 21 and the lower locking slot 51. The battery cell 6 is covered with a phase change material thermally conductive layer 7, and a heat pipe 8 is provided on the outside of the battery cell 6. The evaporation section 81 of the heat pipe 8 is in close contact with the phase change material thermally conductive layer 7, and the condensation section 82 of the heat pipe 8 passes through the partition 2 and enters the heat dissipation cavity 3. A heat sink 9 is connected above the condensation section 82.

[0022] Specifically, the phase change material thermal conductive layer 7 is made of paraffin-expanded graphite composite material. The radiator 9 is an aluminum finned radiator with a fin thickness of 0.3 mm and a spacing of 2 mm. The heat pipe 8 is an inverted U-shaped sintered copper heat pipe with an inner diameter of 3 mm and a wall thickness of 0.5 mm. The working medium inside the heat pipe 8 is deionized water.

[0023] In addition, the lower end of the heat dissipation fins of the radiator 9 is fixedly connected to the condensation section 82 of the heat pipe 8, and the upper end of the heat dissipation fins extends out of the box 1 through the top plate of the box 1.

[0024] The working principle of this utility model's cooling device for mining lithium battery modules is as follows: Under normal operating conditions or low-rate discharge, the heat generated by the battery cell 6 is first rapidly absorbed by the paraffin-expanded graphite composite phase change material thermal conductive layer 7 wrapped around it, converting the heat into latent heat storage through the solid-liquid phase change process of the material. At this time, the evaporation section 81 of the inverted U-shaped sintered copper heat pipe 8 is in close contact with the phase change layer, but active heat dissipation has not yet started due to insufficient temperature difference. When under heavy load conditions or high-rate charge and discharge, the heat generation rate of the battery cell 6 exceeds the heat absorption capacity of the phase change material. The accumulated heat causes a significant temperature difference between the evaporation section 81 of the heat pipe 8 and the phase change layer, activating the phase change cycle of the deionized working fluid inside the heat pipe 8. The heat is then conducted to the aluminum finned heat sink 9 through the condensation section 82. The heat dissipation fins extending to the outside of the housing 1 achieve efficient heat dissipation through natural air convection.

[0025] The above embodiments are merely descriptions of preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope of the present utility model.

Claims

1. A mine lithium battery module cooling device, comprising a box body (1), an electric core (6) is installed in the box body (1), characterized in that: The box (1) is fixed with a partition (2), which divides the interior of the box (1) into an upper heat dissipation cavity (3) and a lower battery module cavity (4). The lower end face of the partition (2) is provided with an upper locking position (21), the bottom of the battery module cavity (4) is provided with a bottom plate (5), the upper end face of the bottom plate (5) is provided with a lower locking position (51), and a battery cell (6) is installed between the upper locking position (21) and the lower locking position (51). The battery cell (6) is covered with a phase change material thermal conductive layer (7), and a heat pipe (8) is provided on the outside of the battery cell (6). The evaporation section (81) of the heat pipe (8) is in close contact with the phase change material thermal conductive layer (7), and the condensation section (82) of the heat pipe (8) passes through the partition (2) and enters the heat dissipation cavity (3). A heat sink (9) is connected above the condensation section (82).

2. The mine-used lithium battery module cooling device according to claim 1, characterized in that: The phase change material thermal conductive layer (7) is made of paraffin-expanded graphite composite material.

3. The mine-used lithium battery module cooling device according to claim 1, characterized in that: The radiator (9) is an aluminum finned radiator with a fin thickness of 0.3 mm and a spacing of 2 mm.

4. The mine-used lithium battery module cooling device according to claim 3, characterized in that: The lower end of the heat dissipation fins of the radiator (9) is fixedly connected to the condensation section (82) of the heat pipe (8), and the upper end of the heat dissipation fins extends out of the box (1) through the top plate of the box (1).

5. The mine-used lithium battery module cooling device according to claim 1, characterized in that: The heat pipe (8) is an inverted U-shaped sintered copper heat pipe with an inner diameter of 3 mm and a wall thickness of 0.5 mm. The working medium inside the heat pipe (8) is deionized water.

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