Air cooling and liquid cooling PACK box structure

Abstract

The utility model relates to the technical field of air cooling and liquid cooling PACK boxes, in particular to an air cooling and liquid cooling PACK box structure which comprises a bottom plate, a liquid cooling plate is fixedly connected to one side of the bottom plate, a shell is fixedly connected to the other side of the bottom plate, at least two battery cell modules are arranged on the bottom plate, the two battery cell modules are both located in the shell, and the liquid cooling plate is fixedly connected with the shell. An air inlet is formed in the shell, an air inlet pipe is arranged on the bottom plate and located between the two battery cell modules, an opening is formed in one end of the air inlet pipe, a plurality of air inlet holes are formed in the air inlet pipe at intervals, a cooling block is fixedly connected to the air inlet pipe, a plurality of cooling holes are formed in the cooling block at intervals, and an exhaust pipe is fixedly connected to the cooling block. A plurality of air exhaust holes are formed in the air exhaust pipe at intervals, one end of the air exhaust pipe is connected with an air outlet pipe, one end of the air outlet pipe is located outside the shell, fans are installed in the air inlet pipe and the air exhaust pipe, and the effect of improving the heat management efficiency of the PACK box is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of air-cooled and liquid-cooled PACK boxes, in particular to an air-cooled and liquid-cooled PACK box structure. BACKGROUND

[0002] A PACK box is a modular battery pack integrated by a plurality of battery cells in series and parallel connection, a built-in battery management system (BMS), a heat dissipation structure and a protective shell, and is widely applied to the fields of electric vehicles and energy storage systems and is a key power unit of new energy equipment.

[0003] Most of the existing PACK boxes are cooled by liquid cooling, and the PACK box is composed of a battery cell module, a liquid cooling plate, a battery management system (BMS) and a sealed box body. The liquid cooling plate is arranged on one side of the battery cell module and realizes temperature equalization through cooling liquid circulation and a heat conduction plate. Usually, a leakage-proof structure is matched to ensure the safety of the PACK box.

[0004] The existing technical solution in the above has the following defects: the liquid cooling plate arranged at the bottom of the battery cell module has a small contact area with the battery cell module, and the thermal management efficiency is low. CONTENT OF THE UTILITY MODEL

[0005] The application provides an air-cooled and liquid-cooled PACK box structure to improve the thermal management efficiency of the PACK box.

[0006] The above technical purpose of the application is achieved through the following technical solution:

[0007] An air-cooled and liquid-cooled PACK box structure comprises a bottom plate, a liquid cooling plate is fixedly connected to one side of the bottom plate, a shell is fixedly connected to the other side of the bottom plate, a battery cell module is arranged on the bottom plate, the battery cell module is provided with at least two groups, and the two groups of battery cell modules are located in the shell, a management assembly is arranged on the shell, an air inlet is formed in the shell, an air inlet pipe is arranged on the bottom plate, the air inlet pipe is located between the two groups of battery cell modules, an opening is formed in one end of the air inlet pipe, a plurality of air inlet holes are arranged on the air inlet pipe at intervals, a cooling block is fixedly connected to the air inlet pipe, a plurality of cooling holes are arranged on the cooling block at intervals, one end of each of the plurality of cooling holes corresponds to one of the plurality of air inlet holes, an air outlet pipe is fixedly connected to the cooling block, a plurality of air outlet holes are arranged on the air outlet pipe at intervals, the other end of each of the plurality of air outlet holes corresponds to one of the plurality of cooling holes, one end of the air outlet pipe is connected to an air outlet pipe, one end of the air outlet pipe is located outside the shell, and a fan is arranged in the air inlet pipe and the air outlet pipe.

[0008] By adopting the technical scheme, air exchanges heat with the liquid cooling plate in the air inlet pipe, the air in the air inlet pipe flows into the cooling hole from the air inlet hole to exchange heat with the cooling block, the cooling block exchanges heat with the single battery cell attached thereto, the temperature of the single battery cell is reduced, and then the air enters the air outlet pipe through the air outlet hole and is discharged to the outside of the shell, the air flows through the surface of the liquid cooling plate through the air inlet pipe and exchanges heat, which can improve the heat dissipation efficiency of the air on the cooling block, improve the heat dissipation efficiency of the cooling block on the single battery cell attached thereto, and improve the heat management efficiency of the PACK box.

[0009] Optionally, the air inlet pipe is fixed with a heat conduction plate.

[0010] By adopting the technical scheme, the heat conduction plate in the air inlet pipe can increase the heat exchange efficiency of the air in the air inlet pipe and the cooling plate, and can guide the air flowing in the air inlet pipe, thereby improving the heat dissipation efficiency of the air in the air inlet pipe on the cooling block and the battery cell module, and improving the heat management efficiency of the PACK box.

[0011] Optionally, the cooling hole is a hexagonal through hole.

[0012] By adopting the technical scheme, the hexagonal air inlet hole can increase the overall structural strength of the cooling block, improve the stability of the battery cell module fixed in the PACK box, and ensure the safety and stability of the PACK box.

[0013] Optionally, the fan is arranged at intervals in the air inlet pipe or the air outlet pipe.

[0014] By adopting the technical scheme, the fans arranged at intervals in the air inlet pipe and the air outlet pipe can increase the flow speed of the air in the air inlet pipe, the air outlet pipe and the cooling hole, and can make the air flow uniformly through the cooling hole, thereby improving the heat dissipation efficiency of the cooling block on the battery cell module and improving the heat management efficiency of the PACK box.

[0015] Optionally, the battery cell module includes a plurality of single battery cells connected in sequence, the plurality of single battery cells are cuboids and both ends of the single battery cells are abutted with end plates, a fixing belt is wound between the two end plates, the fixing belt is made of flexible material, and a heat spreader is abutted between the battery cell module and the bottom plate.

[0016] By adopting the technical scheme, the fixing belt made of flexible material can flexibly fix the battery cell module, can reduce the risk of damage to the battery cell module during transportation, can reduce stress concentration of the battery cell module when the battery cell module is displaced due to thermal expansion and contraction caused by temperature change, and can ensure the safety and stability of the battery cell module, and the bending part of the heat spreader can increase the heat exchange efficiency between the single battery cell and the liquid cooling plate.

[0017] Optionally, the heat spreader is bent to abut the side wall of the battery cell module, and the side wall of the air inlet pipe abuts the bent part of the heat spreader.

[0018] By adopting the technical scheme, a bent section of the heat plate can be attached to the outer wall of the air inlet pipe, improving the heat dissipation efficiency of the battery cell module and the heat management efficiency of the PACK box

[0019] Optionally, a buffer plate is fixed to the cooling block and located between the cooling block and the battery cell module.

[0020] By adopting the technical scheme, the buffer plate can reduce the shaking of the battery cell module in the PACK box, while ensuring the stability of the heat exchange efficiency between the cooling block and the battery cell module, and ensuring the stability of the heat management efficiency of the PACK box.

[0021] Optionally, an air inlet filter screen is fixed to the air inlet of the shell.

[0022] By adopting the technical scheme, the air inlet filter screen at the air inlet can reduce the entry of dust and other impurities in the air into the PACK box, ensuring the cleanliness of the interior of the PACK box.

[0023] In summary, the present application has the following technical effects:

[0024] 1. By providing the air inlet pipe, the cooling block and the air outlet pipe, the air in the air inlet pipe flows into the cooling hole from the air inlet hole and exchanges heat with the cooling block, the monomer battery cell attached to the cooling block exchanges heat, the temperature of the monomer battery cell is reduced, and then the air enters the air outlet pipe through the exhaust hole and is discharged to the outside of the shell. By flowing through the surface of the liquid cooling plate through the air inlet pipe and exchanging heat, the heat dissipation efficiency of the air to the cooling block can be improved, so as to improve the heat dissipation efficiency of the cooling block to the monomer battery cell attached thereto, and improve the heat management efficiency of the PACK box.

[0025] 2. By providing the buffer plate, the buffer plate can reduce the shaking of the battery cell module in the PACK box, while ensuring the stability of the heat exchange efficiency between the cooling block and the battery cell module, and ensuring the stability of the heat management efficiency of the PACK box.

[0026] 3. By providing the air inlet filter screen, the air inlet filter screen at the air inlet can reduce the entry of dust and other impurities in the air into the PACK box, ensuring the cleanliness of the interior of the PACK box. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the external structure diagram of the present application;

[0028] Figure 2 is another external structure diagram of the present application;

[0029] Figure 3 is the prominent structure diagram of the present application after being opened;

[0030] Figure 4It is the prominent structure diagram of the battery cell module, the air inlet pipe, the cooling block, the air outlet pipe and the fan of the application.

[0031] Explanation of reference numerals: 1, bottom plate; 11, liquid cooling plate; 12, fixing strip; 2, shell; 21, management assembly; 22, air inlet; 23, air inlet filter screen; 3, battery cell module; 31, single battery cell; 32, end plate; 33, fixing belt; 34, heat spreading plate; 4, air inlet pipe; 41, air inlet hole; 42, heat conduction plate; 5, cooling block; 51, cooling hole; 52, buffer plate; 53, fixing groove; 6, air outlet pipe; 61, air outlet hole; 62, air outlet pipe; 7, fan. DETAILED DESCRIPTION

[0032] The application will be further described in detail below with reference to the accompanying drawings.

[0033] The embodiment of the application discloses a liquid cooling PACK box structure, referring to Figure 1 and Figure 2 The PACK box comprises a bottom plate 1, the plate surface of the bottom plate 1 is rectangular, a liquid cooling plate 11 is fixedly connected to one side of the bottom plate 1 through bolts, the plate surface of the liquid cooling plate 11 is rectangular, water inlet pipes and water outlet pipes are welded to the side of the liquid cooling plate 11 facing the bottom plate 1, the water inlet pipes and the water outlet pipes are respectively located at the two side edges in the width direction of the liquid cooling plate 11, and the water inlet pipes and the water outlet pipes are both provided with two water inlet pipes and two water outlet pipes at intervals, the ends of the water inlet pipes and the water outlet pipes away from the liquid cooling plate 11 pass through the bottom plate 1, a shell 2 is fixedly connected to the side of the bottom plate 1 away from the liquid cooling plate 11 through bolts, a sealing strip is abutted between the shell 2 and the bottom plate 1, a management assembly 21 is arranged on the side wall of the shell 2, an air inlet 22 is formed in the side wall of the shell 2 where the management assembly 21 is arranged, an air inlet filter screen 23 is fixedly connected to the shell 2 through bolts, and the air inlet filter screen 23 is located at the air inlet 22 and covers the air inlet 22.

[0034] Referring to Figure 3 and Figure 4The side of the bottom plate 1 away from the liquid cooling plate 11 is provided with the battery cell module 3, the battery cell module 3 is arranged in four groups along the width direction of the bottom plate 1, the battery cell module 3 is located between the shell 2 and the bottom plate 1, the battery cell module 3 comprises a plurality of single battery cells 31 connected in series through aluminum continuous rows, the plurality of connected single battery cells 31 are cuboids, and the end faces at both ends of the length direction of the plurality of connected single battery cells 31 abut against the end plates 32, the two end plates 32 are wound with the fixing belts 33, and the fixing belts 33 pass through the side walls of the plurality of connected single battery cells 31, in the embodiment, the fixing belts 33 are made of flexible material, the fixing belts 33 are arranged in two along the plate surface of the end plate 32, the bottom plate 1 is integrally formed with the fixing strips 12, the fixing strips 12 are arranged along the width direction of the bottom plate 1, the fixing strips 12 are arranged in two along the length direction of the bottom plate 1, and the two fixing strips 12 are respectively abutted against the two sides of the two end plates 32 of the battery cell module 3 away from each other, the side of the battery cell module 3 facing the bottom plate 1 abuts against the vapor chamber 34, the vapor chamber 34 is arranged along the length direction of the battery cell module 3, and the two sides of the vapor chamber 34 in the length direction are bent away from the bottom plate 1 and are attached to the side walls of the battery cell module 3.

[0035] Referring to Figure 3 and Figure 4 , the bottom plate 1 is provided with the air inlet pipe 4 along the length direction thereof, one end of the air inlet pipe 4 close to the air inlet 22 is provided with an open end, the air inlet pipe 4 is arranged in three along the width direction of the bottom plate 1 and is located between every two adjacent battery cell modules 3, the side wall of the air inlet pipe 4 abuts against the vapor chamber 34 of the side wall of the battery cell module 3, the top of the air inlet pipe 4 is provided with the air inlet hole 41, the air inlet hole 41 is arranged in a plurality along the top surface of the air inlet pipe 4, the inner side of the bottom of the air inlet pipe 4 is provided with the heat conduction plate 42 along the length direction thereof, the heat conduction plate 42 is arranged in three along the width direction of the air inlet pipe 4, and the heat conduction plate 42 is welded to the inner wall of the air inlet pipe 4.

[0036] Referring to Figure 3 and Figure 4 , the top of the air inlet pipe 4 is welded with the cooling block 5, the cooling block 5 is a cuboid, the cooling block 5 is provided with the cooling hole 51 along the height direction thereof, the cooling hole 51 is a hexagonal through hole, the two ends of the cooling hole 51 communicate with the top surface and the bottom surface of the cooling block 5, the cooling hole 51 is arranged in a plurality along the top surface of the cooling block 5, the side walls of the two sides of the cooling block 5 in the length direction abut against the side walls of the two sides of the battery cell module 3 in the length direction, the side walls of the two sides of the cooling block 5 in the length direction are welded with the buffer plates 52, the side of the buffer plate 52 away from the cooling block 5 is attached to the battery cell module 3, the side of the buffer plate 52 facing the battery cell module 3 is provided with the fixing groove 53 for embedding the fixing belt 33, the fixing groove 53 is arranged in two and corresponds to the two fixing belts 33 of the battery cell module 3.

[0037] Referring to Figure 3 and Figure 4The top of the cooling block 5 is welded with an exhaust pipe 6, the exhaust pipe 6 is arranged along the length direction of the cooling block 5 and the bottom of the exhaust pipe 6 is attached to the cooling block 5, the bottom surface of the exhaust pipe 6 is provided with exhaust holes 61 which are communicated with the cooling holes 51, the exhaust holes 61 are arranged in plurality and correspond to the cooling holes 51 one by one, the three exhaust pipes 6 are commonly connected with an air outlet pipe 62 at the end away from the air inlet 22, the end of the air outlet pipe 62 away from the exhaust pipe 6 extends out of the side wall of the shell 2 away from the side where the management assembly 21 is installed, and the end of the air outlet pipe 62 away from the exhaust pipe 6 is provided with an exhaust filter screen through bolt fastening.

[0038] With reference to Figure 3 The air inlet pipe 4 and the exhaust pipe 6 are both provided with fans 7, and the fans 7 are arranged in three along the length direction of the air inlet pipe 4 or the exhaust pipe 6.

[0039] When the PACK box structure is used, the fan 7 is started to make the air enter the shell 2 from the air inlet hole 41, the air enters the air inlet pipe 4 from the open end of the air inlet pipe 4, the air exchanges heat with the liquid cooling plate 11 in the air inlet pipe 4, the air in the air inlet pipe 4 flows into the cooling hole 51 from the air inlet hole 41 and exchanges heat with the cooling block 5, the cooling block 5 exchanges heat with the single battery cell 31 attached thereto, the temperature of the single battery cell 31 is reduced, and then the air enters the air outlet pipe 62 through the exhaust hole 61 and is discharged to the outside of the shell 2, the air flows through the surface of the liquid cooling plate 11 through the air inlet pipe 4 and exchanges heat, which can improve the heat dissipation efficiency of the air to the cooling block 5, improve the heat dissipation efficiency of the cooling block 5 to the single battery cell 31 attached thereto, and improve the heat management efficiency of the PACK box.

[0040] The heat conduction plate 42 in the air inlet pipe 4 can increase the heat exchange efficiency of the air in the air inlet pipe 4 with the cooling plate, and can also guide the air flowing in the air inlet pipe 4, thereby improving the heat dissipation efficiency of the air in the air inlet pipe 4 to the cooling block 5 and the battery cell module 3, and improving the heat management efficiency of the PACK box. The air inlet filter screen 23 at the air inlet 22 can reduce the impurities such as dust in the air entering the PACK box, so as to ensure the cleanliness of the inside of the PACK box, and the plurality of fans 7 arranged in the air inlet pipe 4 and the air outlet pipe 62 can increase the flow speed of the air in the air inlet pipe 4, the air outlet pipe 62 and the cooling hole 51, and can also make the air flow uniformly through the cooling hole 51, thereby improving the heat dissipation efficiency of the cooling block 5 to the battery cell module 3 and improving the heat management efficiency of the PACK box.

[0041] The hexagonal air inlet hole 41 can increase the overall structural strength of the cooling block 5, improve the stability of the battery cell module 3 in the PACK box, and ensure the safety and stability of the PACK box. The buffer plate 52 can reduce the shaking of the battery cell module 3 in the PACK box, while ensuring the stability of the heat exchange efficiency between the cooling block 5 and the battery cell module 3, and ensuring the stability of the thermal management efficiency of the PACK box. The bending part of the vapor chamber 34 can increase the heat exchange efficiency between the single battery cell 31 and the liquid cooling plate 11, and can be attached to the outer wall of the air inlet pipe 4 to improve the heat dissipation efficiency of the battery cell module 3 and the thermal management efficiency of the PACK box.

[0042] The fixing belt 33 made of flexible material can fix the battery cell module 3 with flexible binding, which can reduce the risk of damage to the battery cell module 3 caused by the impact between the fixing belt 33 and the cooling block 5 during transportation. When the battery cell module 3 is displaced due to thermal expansion and contraction caused by temperature changes, the stress concentration of the battery cell module 3 can be reduced, and the safety and stability of the battery cell module 3 can be ensured.

[0043] The specific embodiments are only an explanation of the present application, which is not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, as long as the modifications are within the scope of the claims of the present application.

Claims

1. An air-cooled liquid-filled PACK case structure, characterized by: The PACK box comprises a bottom plate (1), one side of the bottom plate (1) is fixedly connected with a liquid cooling plate (11), the other side of the bottom plate (1) is fixedly connected with a shell (2), the bottom plate (1) is provided with a battery cell module (3), the battery cell module (3) is provided with at least two groups, and the two groups of battery cell modules (3) are located in the shell (2), the shell (2) is provided with a management assembly (21), the shell (2) is provided with an air inlet (22), the bottom plate (1) is provided with an air inlet pipe (4), the air inlet pipe (4) is located between the two groups of battery cell modules (3), one end of the air inlet pipe (4) is provided with an opening, a plurality of air inlet holes (41) are arranged on the air inlet pipe (4) at intervals, a cooling block (5) is fixedly connected to the air inlet pipe (4), a plurality of cooling holes (51) are arranged on the cooling block (5) at intervals, and one end of the plurality of cooling holes (51) corresponds to the plurality of air inlet holes (41) one by one, an air outlet pipe (6) is fixedly connected to the cooling block (5), a plurality of air outlet holes (61) are arranged on the air outlet pipe (6) at intervals, the plurality of air outlet holes (61) correspond to the other ends of the plurality of cooling holes (51) one by one, one end of the air outlet pipe (6) is connected with an air outlet pipe (62), one end of the air outlet pipe (62) is located outside the shell (2), and the air inlet pipe (4) and the air outlet pipe (6) are both provided with a fan (7).

2. The liquid-cooled PACK box structure of claim 1, wherein: The air inlet pipe (4) is fixedly connected with a heat conduction plate (42).

3. The liquid-cooled PACK box structure of claim 2, wherein: The cooling hole (51) is a hexagonal through hole.

4. The liquid-cooled PACK box structure of claim 3, wherein: The fan (7) is arranged at intervals in the air inlet pipe (4) or the air outlet pipe (6).

5. The liquid-cooled PACK box structure of claim 1, wherein: The battery cell module (3) comprises a plurality of single battery cells (31) connected in sequence, the plurality of single battery cells (31) are cuboids, and both ends of the single battery cells (31) are abutted with end plates (32), the two end plates (32) are wound with a fixing belt (33), the fixing belt (33) is made of flexible material, and the battery cell module (3) is abutted with a vapor chamber (34) between the bottom plate (1).

6. The liquid-cooled PACK box structure of claim 5, wherein: The vapor chamber (34) is bent to fit the side wall of the battery cell module (3), and the side wall of the air inlet pipe (4) abuts the bent section of the vapor chamber (34).

7. The liquid-cooled PACK box structure of claim 1, wherein: The cooling block (5) is fixedly connected with a buffer plate (52), and the buffer plate (52) is located between the cooling block (5) and the battery cell module (3).

8. The liquid-cooled PACK box structure of claim 7, wherein: The shell (2) is fixedly connected with an air inlet filter screen (23) at the air inlet (22).

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