Secondary high-efficiency heat exchange structure of liquid cooling plate

Abstract

The utility model discloses a secondary high-efficiency heat exchange structure of a liquid cooling plate, which comprises a bottom plate, auxiliary plates are uniformly arranged on the outer surface of the bottom plate, a side box is welded and mounted on the side surface of one end, far away from a liquid inlet nozzle, of the bottom plate, a liquid outlet nozzle is mounted on the outer surface of the side box in a threaded manner, and the outer surface of a battery cell is attached to a battery protection shell. A multi-term communication structure is arranged between the bottom plate and the auxiliary plate, and cooling liquid fed into the bottom plate through the liquid inlet nozzles is dispersed through the multi-term communication structure, so that the heat dissipation efficiency of the liquid cooling plate is improved. According to the secondary high-efficiency heat exchange structure of the liquid cooling plate, when the cooling plate runs, cooling liquid is injected into the bottom plate from the liquid inlet nozzle, so that the cooling liquid moves along the liquid distribution pipeline, is distributed into the bottom heat dissipation pipeline and the auxiliary liquid inlet through the liquid distribution pipeline, and flows into the bottom plate and the auxiliary plate respectively; and the cooling liquid can be separated out without redundant joints, so that the usable area of the cooling plate in the module is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid cooling plates, in particular to a liquid cooling plate secondary high-efficiency heat exchange structure. Background Art

[0002] Power batteries are core components of new energy electric vehicles. Power batteries generate heat during the cycle process. If the heat is not dissipated in a timely manner, heat will accumulate inside the battery pack, which will have an immeasurable impact on the power battery. If the power battery is operated in a high-temperature environment for a long time, its life will be significantly shortened, accompanied by performance degradation and even safety accidents. According to research, when the operating temperature of the power battery is continuously maintained above 45°C, its cycle life will be significantly reduced, and this is more obvious during high-speed charge and discharge processes. This shows that a continuous high-temperature operating environment will have a great impact on the performance of the power battery. The most commonly used existing technology is liquid cooling. The coolant in the cooling pipe of the power battery removes the heat generated by the power battery during operation to reduce the operating temperature of the power battery. However, the existing technology also uses cold plate designs that cover the entire module cavity, resulting in a corresponding increase in inlet and outlet interfaces and occupying more space, resulting in low battery cooling efficiency and reduced space utilization. Utility Model Content

[0003] The purpose of the present invention is to provide a liquid cooling plate secondary high-efficiency heat exchange structure to solve the problem in the above background technology that too many joints of the liquid cooling plate occupy too much space and result in low cooling efficiency.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a secondary high-efficiency heat exchange structure of a liquid cooling plate, comprising a base plate, the outer surface of the base plate being evenly provided with sub-plates, and the sub-plates being vertically welded to the outer surface of the base plate, an outer surface of one side of the base plate being penetrated by a liquid inlet nozzle, and the liquid inlet nozzle and the base plate being threadedly connected, a side box being welded and installed on the side surface of the end of the base plate away from the liquid inlet nozzle, and a liquid outlet nozzle being threadedly installed on the outer surface of the side box, a battery protective shell being inserted between the base plate and the sub-plate, and a battery cell being placed inside the battery protective shell, the outer surface of the battery cell being in contact with the battery protective shell, and the outer surface of the battery protective shell being in contact with the outer surfaces of the sub-plate and the base plate, a plurality of connecting structures being provided between the base plate and the sub-plate, and the coolant delivered into the interior of the base plate through the liquid inlet nozzle being dispersed through the plurality of connecting structures, thereby improving the heat dissipation efficiency of the liquid cooling plate.

[0005] Preferably, the multiple interconnecting structures include: a liquid separation pipe, which is arranged inside the base plate, and the base plate is not penetrated by the liquid separation pipe, the liquid separation pipe is arranged on a side close to the liquid inlet nozzle, and the liquid inlet nozzle and the liquid separation pipe are concentrically designed, and an auxiliary liquid inlet is penetrated through the outer surface of the base plate, and the auxiliary liquid inlet is connected to the liquid separation pipe.

[0006] By adopting the above technical solution, the coolant injected into the base plate through the liquid inlet nozzle can be dispersed through the liquid distribution pipe and injected into the bottom heat dissipation pipe and the auxiliary liquid inlet respectively, so that the coolant can be separated while reducing the joints, increasing the utilized space and expanding the area of ​​the liquid cooling plate.

[0007] Preferably, bottom heat dissipation pipes are evenly opened inside the bottom plate, and one end of the bottom heat dissipation pipe is connected to the liquid separation pipe, and the end of the bottom heat dissipation pipe away from the liquid inlet nozzle is connected to the side box.

[0008] By adopting the above technical solution, the coolant injected through the liquid inlet nozzle can be transported to the inside of the bottom heat dissipation pipe, so that the coolant flowing in the bottom heat dissipation pipe takes away the temperature absorbed by the bottom plate, thereby reducing the temperature of the battery cell.

[0009] Preferably, the outer surface of one end of the base plate away from the sub-plate is evenly installed with cooling fins, and the end of the cooling fins away from the liquid inlet is connected to the outer surface of the side box, the cooling fins pass through the outer surface of the battery box, and a part of the cooling fins is exposed inside the bottom shell of the battery pack, and the bottom shell of the battery pack with cooling fins is connected to the outside.

[0010] By adopting the above technical solution, heat can be transferred to the cooling fins through the bottom plate. The wind blowing into the battery bottom shell when the car moves takes away the temperature of the cooling fins, thereby cooling the bottom plate. At the same time, the cooling fins and the battery bottom shell can prevent the impact of ground debris on the battery pack, thereby reducing the chance of damage to the battery cells and the bottom plate.

[0011] Preferably, a drainage box is fixedly installed on the side surface of one end of the bottom plate, and the outer surface of the end of the drainage box away from the liquid inlet nozzle is connected to the side box, and a delivery pipe is opened inside the side box and the drainage box, and the delivery pipe is connected to the liquid outlet nozzle, and the outer surface of the drainage box is fixed to the outer surface of one end of the sub-plate.

[0012] By adopting the above technical solution, the coolant discharged from the sub-plate can be concentrated into the drain tank and transported to the side box through the delivery pipe, and the heat is conducted to the heat dissipation fins and then discharged from the liquid outlet.

[0013] Preferably, a secondary drainage mechanism is provided between the secondary plate and the drainage box, and the secondary drainage mechanism takes away the heat generated by the discharge of the battery cells absorbed by the secondary plate, so that the battery pack can operate stably at a certain temperature.

[0014] By adopting the above technical solution, the temperature of the battery core absorbed by the sub-plate can be taken away by the coolant, thereby reducing the temperature of the battery core during operation.

[0015] Preferably, the auxiliary drainage mechanism includes: an auxiliary heat dissipation pipe, the auxiliary heat dissipation pipe is opened inside the auxiliary plate, and the auxiliary heat dissipation pipe is connected to the auxiliary liquid inlet, the end of the auxiliary heat dissipation pipe away from the auxiliary liquid inlet is connected to the auxiliary liquid outlet, and the auxiliary liquid outlet is connected to the delivery pipe.

[0016] By adopting the above technical solution, the coolant in the liquid distribution pipe can be sent into the interior of the auxiliary heat dissipation pipe through the auxiliary liquid inlet, and the temperature absorbed by the auxiliary plate is taken away by the auxiliary heat dissipation pipe to reduce the temperature of the auxiliary plate and thus reduce the temperature of the battery cell.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the liquid cooling plate secondary high-efficiency heat exchange structure:

[0018] 1. When the cooling plate is in operation, coolant is injected into the base plate from the liquid inlet nozzle. The coolant moves along the liquid distribution pipe and is distributed to the bottom heat dissipation pipe and the auxiliary liquid inlet through the liquid distribution pipe. The coolant flows into the base plate and the auxiliary plate respectively. The coolant can be separated without additional joints, which increases the usable area of ​​the cooling plate in the module.

[0019] 2. When the coolant enters the liquid separation pipe, it will enter the bottom heat dissipation pipe and the auxiliary liquid inlet respectively. When the coolant passes through the bottom heat dissipation pipe, it will remove the heat of the battery core absorbed by the bottom plate, while the coolant passing through the auxiliary liquid inlet will remove the heat of the battery core absorbed by the auxiliary plate through the auxiliary heat dissipation pipe. Through the cooperation of the bottom plate and the auxiliary plate, the battery core transfers most of the heat to the interior of the liquid cold plate. The contact between the battery core, the bottom plate and the auxiliary plate improves the heat dissipation efficiency of the battery core, allowing the battery core to operate within the appropriate temperature range and extend the service life of the battery core.

[0020] 3. When the bottom plate absorbs heat, it will also transfer part of the heat to the inside of the cooling fins. When the car is moving, the external wind will enter the bottom shell of the battery pack of the car. The wind will take away the temperature of the cooling fins, thereby reducing the temperature of the bottom plate. At the same time, the battery pack bottom shell and the cooling fins can block and weaken the impact of road debris on the battery pack, reduce the chance of damage to the battery cells and the bottom plate, and assist in cooling the bottom plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the auxiliary board and battery protection shell of the utility model;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the bottom plate and the auxiliary plate of the utility model;

[0023] Figure 3 This is a schematic diagram of the cross-sectional three-dimensional structure of the liquid separation pipe and the bottom heat dissipation pipe of the utility model;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the auxiliary liquid inlet and auxiliary liquid outlet of the utility model;

[0025] Figure 5 This is a schematic diagram of the cross-sectional three-dimensional structure of the drain box and the side box of the utility model;

[0026] Figure 6 This is a schematic diagram of the sectional three-dimensional structure of the auxiliary plate and auxiliary heat dissipation pipe of the utility model.

[0027] In the figure: 1. Base plate; 2. Heat dissipation fins; 3. Liquid inlet nozzle; 4. Liquid outlet nozzle; 5. Drain box; 6. Sub-plate; 7. Liquid distribution pipe; 8. Bottom heat dissipation pipe; 9. Sub-liquid inlet; 10. Sub-liquid outlet; 11. Delivery pipe; 12. Side box; 13. Sub-heat dissipation pipe; 14. Battery protective shell; 15. Battery cell. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-6 The utility model provides a technical solution: a liquid cooling plate secondary high-efficiency heat exchange structure, including a bottom plate 1, wherein the outer surface of the bottom plate 1 is evenly provided with a sub-plate 6, and the sub-plate 6 is vertically welded to the outer surface of the bottom plate 1, and a liquid inlet nozzle 3 is installed through the outer surface of one side of the bottom plate 1, and the liquid inlet nozzle 3 is threadedly connected to the bottom plate 1, and a side box 12 is welded and installed on the side surface of the end of the bottom plate 1 away from the liquid inlet nozzle 3, and a liquid outlet nozzle 4 is threadedly installed on the outer surface of the side box 12, a battery protection shell 14 is inserted between the bottom plate 1 and the sub-plate 6, and a battery cell 15 is placed inside the battery protection shell 14, the outer surface of the battery cell 15 is in contact with the battery protection shell 14, and the outer surface of the battery protection shell 14 is in contact with the outer surface of the sub-plate 6 and the bottom plate 1, and multiple connecting structures are provided between the bottom plate 1 and the sub-plate 6, through the multiple connecting structures, the coolant sent into the bottom plate 1 through the liquid inlet nozzle 3 is dispersed, thereby improving the heat dissipation efficiency of the liquid cooling plate.

[0030] When the power battery pack is running, the battery cells 15 will conduct the generated heat to the bottom plate 1 and the sub-plate 6 through the battery protection shell 14. At the same time, the battery protection shell 14 can fix the battery cells 15 and play a certain protective role for the battery cells 15.

[0031] The multiple interconnecting structures include: a liquid separation pipe 7, which is arranged inside the bottom plate 1, and the bottom plate 1 is not penetrated by the liquid separation pipe 7, the liquid separation pipe 7 is arranged on the side close to the liquid inlet nozzle 3, and the liquid inlet nozzle 3 and the liquid separation pipe 7 are concentrically designed, and the outer surface of the bottom plate 1 is penetrated by a secondary liquid inlet 9, and the secondary liquid inlet 9 is connected to the liquid separation pipe 7

[0032] The coolant is injected into the interior of the base plate 1 through the liquid inlet nozzle 3, so that the coolant flows along the liquid separation pipe 7, and is diverted to the base plate 1 and the sub-plate 6 through the liquid separation pipe 7. The number of joints is reduced so that the cooling plate can contact the battery protective shell 14 and the battery cell 15 with the largest area, thereby improving the cooling efficiency of the battery cell 15 and enabling the power battery pack to operate stably.

[0033] Bottom heat dissipation pipes 8 are evenly arranged inside the bottom plate 1 , and one end of the bottom heat dissipation pipe 8 is connected to the liquid separation pipe 7 , and the end of the bottom heat dissipation pipe 8 away from the liquid inlet nozzle 3 is connected to the side box 12 .

[0034] When the coolant is injected into the bottom heat dissipation pipe 8 through the liquid distribution pipe 7 , the bottom plate 1 will take away the heat absorbed by the battery cell 15 through the flow of the coolant, thereby reducing the temperature of the bottom of the battery cell 15 .

[0035] The outer surface of the end of the bottom plate 1 away from the sub-plate 6 is evenly installed with cooling fins 2, and the end of the cooling fins 2 away from the liquid inlet nozzle 3 is connected to the outer surface of the side box 12. The cooling fins 2 pass through the outer surface of the battery box, and a part of the cooling fins 2 is exposed inside the bottom shell of the battery pack, and the cooling fins 2 and the bottom shell of the battery pack are connected to the outside.

[0036] The heat dissipation fins 2 can conduct the temperature absorbed by the bottom plate 1 to themselves, and the wind blowing into the battery bottom shell when the vehicle is moving will take away the temperature of the heat dissipation fins 2, so that the temperature of the bottom plate 1 is further reduced. At the same time, the heat dissipation fins 2 and the battery bottom shell can prevent the battery pack from being hit by debris on the road, reducing the chance of damage to the battery cell 15 while also having the effect of assisting in heat dissipation.

[0037] A drainage box 5 is fixedly installed on the side surface of one end of the bottom plate 1, and the outer surface of the end of the drainage box 5 away from the liquid inlet nozzle 3 is connected to the side box 12. A delivery pipe 11 is opened inside the side box 12 and the drainage box 5, and the delivery pipe 11 is connected to the liquid outlet nozzle 4. The outer surface of the drainage box 5 is fixed to the outer surface of one end of the sub-plate 6.

[0038] The coolant passing through the sub-plate 6 is collected through the drain tank 5 and discharged into the side box 12 through the delivery pipe 11. The heat is conducted by the bonding and fixation between the side box 12 and the heat dissipation fins 2, and then discharged outwardly through the liquid outlet 4 into the cooling device of the automobile.

[0039] A secondary drainage mechanism is provided between the secondary plate 6 and the drain tank 5. The secondary drainage mechanism takes away the heat generated by the battery cell 15 during discharge absorbed by the secondary plate 6, so that the battery pack can operate stably at a certain temperature. The secondary drainage mechanism includes: a secondary heat dissipation pipe 13, the secondary heat dissipation pipe 13 is opened inside the secondary plate 6, and the secondary heat dissipation pipe 13 is connected to the secondary liquid inlet 9, and the end of the secondary heat dissipation pipe 13 away from the secondary liquid inlet 9 is connected to the secondary liquid outlet 10, and the secondary liquid outlet 10 is connected to the delivery pipe 11.

[0040] The coolant is injected into the interior of the liquid distribution pipe 7 through the liquid inlet nozzle 3, and is discharged into the interior of the sub-plate 6 through the auxiliary liquid inlet port 9, so that the coolant moves through the auxiliary heat dissipation pipe 13 to absorb the heat absorbed by the sub-plate 6 and generated during the operation of the battery cell 15, thereby reducing the temperature on both sides of the battery cell 15. After the temperature of the battery cell 15 drops, it is discharged into the delivery pipe 11 through the auxiliary liquid outlet port 10 and then discharged outwardly through the liquid outlet nozzle 4. In conjunction with the cooling of the bottom plate 1, the cooling efficiency of the battery cell 15 is improved, so that the battery cell 15 can operate stably at a suitable temperature and the service life of the battery cell 15 is increased.

[0041] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid cooling plate secondary high-efficiency heat exchange structure, comprising a base plate (1), the outer surface of the base plate (1) is evenly provided with sub-plates (6), and the sub-plates (6) are vertically welded to the outer surface of the base plate (1), a liquid inlet nozzle (3) is installed through the outer surface of one side of the base plate (1), and the liquid inlet nozzle (3) and the base plate (1) are threadedly connected, a side box (12) is welded and installed on the side surface of one end of the base plate (1) away from the liquid inlet nozzle (3), and a liquid outlet nozzle (4) is threadedly installed on the outer surface of the side box (12), a battery protection shell (14) is inserted between the base plate (1) and the sub-plate (6), and a battery cell (15) is placed inside the battery protection shell (14), the outer surface of the battery cell (15) is in contact with the battery protection shell (14), and the outer surface of the battery protection shell (14) is in contact with the outer surfaces of the sub-plate (6) and the base plate (1), characterized in that: A plurality of interconnecting structures are provided between the base plate (1) and the auxiliary plate (6), and the cooling liquid fed into the interior of the base plate (1) through the liquid inlet nozzle (3) is dispersed by the plurality of interconnecting structures, thereby improving the heat dissipation efficiency of the liquid cooling plate.

2. The liquid cooling plate secondary high-efficiency heat exchange structure according to claim 1, characterized in that: The multiple interconnected structures include: a liquid separation pipe (7), the liquid separation pipe (7) is arranged inside the bottom plate (1), and the bottom plate (1) is not penetrated by the liquid separation pipe (7), the liquid separation pipe (7) is arranged on a side close to the liquid inlet nozzle (3), and the liquid inlet nozzle (3) and the liquid separation pipe (7) are concentrically designed, and an auxiliary liquid inlet (9) is penetrated on the outer surface of the bottom plate (1), and the auxiliary liquid inlet (9) is connected to the liquid separation pipe (7).

3. The liquid cooling plate secondary high-efficiency heat exchange structure according to claim 1, characterized in that: Bottom heat dissipation pipes (8) are evenly arranged inside the bottom plate (1), and one end of the bottom heat dissipation pipe (8) is connected to the liquid separation pipe (7), and the end of the bottom heat dissipation pipe (8) away from the liquid inlet nozzle (3) is connected to the side box (12).

4. The liquid cooling plate secondary high-efficiency heat exchange structure according to claim 1, characterized in that: The outer surface of one end of the bottom plate (1) away from the auxiliary plate (6) is evenly provided with heat dissipation fins (2), and the end of the heat dissipation fins (2) away from the liquid inlet nozzle (3) is connected to the outer surface of the side box (12), the heat dissipation fins (2) penetrate the outer surface of the battery box, and a part of the heat dissipation fins (2) is exposed inside the bottom shell of the battery pack, and the heat dissipation fins (2) and the bottom shell of the battery pack are connected to the outside.

5. The liquid cooling plate secondary high-efficiency heat exchange structure according to claim 1, characterized in that: A liquid drain box (5) is fixedly mounted on the side surface of one end of the bottom plate (1), and the outer surface of the end of the liquid drain box (5) away from the liquid inlet nozzle (3) is connected to the side box (12), a delivery pipe (11) is opened inside the side box (12) and the liquid drain box (5), and the delivery pipe (11) is connected to the liquid outlet nozzle (4), and the outer surface of the liquid drain box (5) is fixed to the outer surface of one end of the sub-plate (6).

6. The liquid cooling plate secondary high-efficiency heat exchange structure according to claim 1, characterized in that: A secondary drainage mechanism is provided between the secondary plate (6) and the drainage box (5), and the heat generated by the battery core (15) during discharge absorbed by the secondary plate (6) is removed by the secondary drainage mechanism, so that the battery pack can operate stably at a certain temperature.

7. The liquid cooling plate secondary high-efficiency heat exchange structure according to claim 6, characterized in that: The auxiliary drainage mechanism comprises: an auxiliary heat dissipation pipe (13), the auxiliary heat dissipation pipe (13) is opened inside the auxiliary plate (6), and the auxiliary heat dissipation pipe (13) is connected to the auxiliary liquid inlet (9), the end of the auxiliary heat dissipation pipe (13) away from the auxiliary liquid inlet (9) is connected to the auxiliary liquid outlet (10), and the auxiliary liquid outlet (10) is connected to the delivery pipe (11).

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