An air-cooled industrial and commercial energy storage battery

Abstract

The present application relates to an air-cooled industrial and commercial energy storage battery, and relates to the technical field of energy storage batteries, which includes a box body, a plurality of battery modules are arranged in the box body, the battery module includes a plurality of battery cells connected in sequence, a battery management system for monitoring the temperature of the battery module is arranged on the box body, an air inlet is arranged at the front end of the box body, a negative pressure fan for discharging the air in the box body is arranged at the rear end of the box body, the negative pressure fan is electrically connected to the battery management system, an air duct is arranged between two adjacent battery modules, the air duct is connected to the air inlet, a gap is left between two adjacent battery cells and is set as a heat dissipation groove, an air outlet hole consistent with the number of heat dissipation grooves is arranged on the surface of the air duct, and a ventilation hole consistent with the number of air outlet holes is arranged on the surface of the box body, and the heat dissipation groove, air outlet hole and ventilation hole are arranged corresponding to each other. The present application can make the battery cells cool evenly, and improve the energy efficiency of the battery cells and the overall performance of the battery pack.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage batteries, and in particular to an air-cooled industrial and commercial energy storage battery. Background Art

[0002] Industrial and commercial energy storage equipment refers to electrical energy storage equipment used in industrial and commercial fields, which can store electrical energy when needed and release electrical energy when load demand is high or grid power supply is unstable.

[0003] In related technologies, air cooling technology uses air as a heat exchange medium, circulates air in the battery pack through mechanical equipment such as air conditioners, and uses the temperature difference between the battery module and the air for heat transfer. Since the battery cell releases a lot of heat during the charging and discharging process, it is difficult for the air to cool each battery cell in the battery pack evenly during the circulation process, resulting in poor cooling effect. Summary of the invention

[0004] In order to improve the cooling effect on energy storage batteries, the present application provides an air-cooled industrial and commercial energy storage battery.

[0005] The air-cooled industrial and commercial energy storage battery provided in this application adopts the following technical solution: A wind-cooled industrial and commercial energy storage battery comprises a box body, a plurality of battery modules are arranged in the box body, the battery module comprises a plurality of battery cells connected in sequence, a battery management system for monitoring the temperature of the battery modules is arranged on the box body, an air inlet is arranged at the front end of the box body, a negative pressure fan for discharging air in the box body is arranged at the rear end of the box body, the negative pressure fan is electrically connected to the battery management system, an air duct is arranged between two adjacent battery modules, the air duct is connected to the air inlet, a gap is left between two adjacent battery cells and is set as a heat dissipation groove, an air outlet hole with the same number as the heat dissipation groove is arranged on the surface of the air duct, and a ventilation hole with the same number as the air outlet hole is arranged on the surface of the box body, and the heat dissipation groove, the air outlet hole and the ventilation hole are arranged corresponding to each other.

[0006] By adopting the above technical solution, when the battery management system detects that the operating temperature of the battery module is too high, the battery management system drives the internal negative pressure fan to discharge the hot air in the box, so that the external cold air can quickly flow into the box.

[0007] The outside cold air can enter the air duct from the air inlet, and then enter the heat sink from the air duct and flow directly to the negative pressure fan. The cold air entering the heat sink then flows to the negative pressure fan. The outside air can also enter the box from the vents and flow to the negative pressure fan, or enter the heat sink and then flow to the negative pressure fan. In this way, the air circulates inside the box and wraps each battery cell so that the battery cell is cooled evenly, which can effectively improve the efficiency of the battery cell and improve the overall performance of the battery pack.

[0008] Optionally, first foams are provided on inner walls on opposite sides of the heat dissipation groove, and two adjacent first foams abut against each other.

[0009] By adopting the above technical solution, the two battery cells are separated by the first foam, so that a heat dissipation groove is formed between the two battery cells.

[0010] Optionally, a second foam is provided on the air duct, the second foam cover is provided on the air inlet hole, and the second foam is communicated with the inner cavity of the air duct.

[0011] By adopting the above technical solution, the cold air entering the air inlet hole is gathered by the second foam and flows into the air duct, and then flows out from the inside of the air duct, thereby forming a cold air circulation on the inner wall of the box.

[0012] Optionally, a plurality of air guide plates are arranged in the second foam, and the air guide plates are arranged to be inclined toward the air duct.

[0013] By adopting the above technical solution, after the external cold air enters the inclined air guide plate, it will flow into the air duct along the inclined surface of the air guide plate. The air flow rate on the inclined surface will be greater than the normal flow rate. In addition, the slow air flow will follow the fast air flow, so that the cold air entering the second foam can effectively increase the flow rate.

[0014] Optionally, a third foam is provided in the air duct, and a number of arc grooves which are consistent with the air outlet holes are opened in the third foam, and the arc grooves are connected with the air outlet holes.

[0015] By adopting the above technical solution, external cold air enters the arc-shaped groove and then flows out from the air outlet through the arc-shaped groove, thereby reducing the loss of cold air entering the air duct.

[0016] Optionally, an air inlet fan is provided at the air inlet hole of the box, the air inlet fan is electrically connected to the battery management system, and spiral teeth are sleeved on the rotating shaft of the air inlet fan. After the air inlet fan is driven, air flows into the box along the surface of the spiral teeth.

[0017] By adopting the above technical solution, the battery management system drives the air intake fan to rotate, so that the external cold air can quickly flow into the box and form a vortex airflow through the surface of the spiral teeth, which can further increase the flow rate of the airflow and increase the efficiency of air cooling and heat dissipation.

[0018] Optionally, an annular plate is provided on the inner wall of the box body, an annular slide groove is opened on the annular plate, an annular rack chain is slidably arranged in the slide groove, a gear rod group is provided in the box body, and the spiral teeth and the rack chain are linked through the gear rod group.

[0019] By adopting the above technical solution, the spiral teeth rotate to drive the toothed rod to rotate, thereby driving the rack chain to rotate along the slide groove.

[0020] Optionally, a plurality of nozzles are provided on the rack chain, an air inlet is provided on a side wall of the nozzle, a nozzle is provided on a side of the nozzle away from the rack chain, and the air inlet and the nozzle are connected.

[0021] By adopting the above technical solution, the nozzle slides synchronously after the rack chain slides. After the nozzle slides, the cold air flowing inside the box enters the nozzle and is ejected from the nozzle, so that the cold air can be evenly sprayed on the surface of the battery module.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. Allow outside air to enter the box and circulate in the battery pack, so that the battery cells are evenly cooled, which can effectively improve the efficiency of the battery cells and the overall performance of the battery pack; 2. It can effectively increase the flow rate of incoming cold air and increase the heat dissipation efficiency of air cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of this application; Figure 2 It is a schematic diagram of the explosion of the cover plate in the present application, mainly showing the battery module; Figure 3 It is a schematic diagram of the explosion after the cover plate is removed in this application, mainly showing the first foam; Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure along the AA plane; Figure 5 yes Figure 4 A schematic diagram of the enlarged structure of the local part at B in the middle; Figure 6 It is a structural schematic diagram of the air inlet fan in this application; Figure 7 yes Figure 3 The schematic diagram of the partial cross-sectional structure along the CC plane in the middle mainly shows the annular plate, the third transmission gear rod and the nozzle; Figure 8 yes Figure 2 A partial enlarged schematic diagram of point D in the middle.

[0024] Description of the drawings: 1. Box body; 2. Battery management system; 3. Air inlet; 4. Negative pressure fan; 5. Mounting slot; 6. Cover plate; 7. Battery module; 701, Battery cell; 8. Air duct; 9. First foam; 10. Heat dissipation slot; 11. Air outlet; 12. Ventilation hole; 13. Second foam; 14. Air guide plate; 15. Third foam; 16. Arc groove; 17. Bus; 18. Air inlet fan; 19. Rotating shaft; 20. Rotating rod; 21. Spiral teeth; 22. Spiral protrusion; 23. Ring plate; 24. Slide; 25. Connecting rod; 26. Rack chain; 27. First transmission gear rod; 28. Second transmission gear rod; 29. ​​Third transmission gear rod; 30. Nozzle; 31. Air inlet; 32. Spout. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1 -Attached Figure 8 , further details of this application are given.

[0026] An air-cooled industrial and commercial energy storage battery, referring to Figure 1 , Figure 2 , including a box body 1, to which a battery management system 2 is fixedly connected on one side. A plurality of air inlet holes 3 are provided at one end of the box body 1, and the plurality of air inlet holes 3 are combined to form a dustproof net to prevent large particles of impurities from the outside from entering the box body 1. A negative pressure hole is provided at the end of the box body 1 away from the air inlet hole 3, and a negative pressure fan 4 is fixedly connected to the inner wall of the negative pressure hole, and the negative pressure fan 4 is electrically connected to the battery management system 2. A mounting groove 5 is provided in the box body 1, and a cover plate 6 is fixedly connected to the box body 1 at the notch of the mounting groove 5. Two battery modules 7 are fixedly connected in the mounting groove 5, and an air duct 8 is fixedly connected between the two battery modules 7. In addition, gaps are provided between the two battery modules 7 and the air duct 8, and between the two battery modules 7 and the inner wall of the box body 1.

[0027] Reference Figure 3 The battery module 7 includes a plurality of battery cells 701 which are fixedly connected in sequence by busbars 17, wherein the busbars 17 are used to connect the metal sheets of the battery cells 701. First foams 9 are fixedly connected to the opposite side walls of adjacent battery cells 701. The first foams 9 are in the shape of strips, and two first foams 9 opposite to adjacent battery cells 701 abut against each other, so that a gap is generated between the adjacent battery cells 701 and a heat dissipation groove 10 is formed.

[0028] The air duct 8 is hollow inside and has a plurality of air outlet holes 11 on both sides that are connected to the inside. The number of air outlet holes 11 on one side is consistent with the number of heat dissipation slots 10 of the adjacent battery module 7, and the positions of the air outlet holes 11 correspond to the positions of the heat dissipation slots 10. A plurality of ventilation holes 12 are provided on the two opposite side walls of the box body 1, and the number and positions of the plurality of ventilation holes 12 are consistent with the air outlet holes 11. The ventilation holes 12, heat dissipation slots 10, and air outlet holes 11 on the same side are arranged corresponding to each other, and the three are located on the same straight line.

[0029] Reference Figure 4 , Figure 5 The end of the air duct 8 near the air inlet 3 is fixedly connected with a second foam 13, the second foam 13 is tubular, and an opening is provided on the side of the air duct 8 near the second foam 13, and the second foam 13 is used to connect the air inlet 3 with the inside of the air duct 8. Two air guide plates 14 inclined toward the inside of the air duct 8 are fixedly connected inside the second foam 13, and the end of the air guide plate 14 away from the air inlet 3 is flush with the inner wall of the opening of the air duct 8.

[0030] refer to Figure 4 The air duct 8 is fixedly connected with third foams 15 on two opposite inner walls where the air outlet holes 11 are located, and arc grooves 16 corresponding to the number of the air outlet holes 11 are opened on the side walls of the third foams 15, and the arc grooves 16 are connected to the air outlet holes 11. A gap is set between two oppositely arranged third foams 15, so that two adjacent arc grooves 16 are connected.

[0031] Reference Figure 5 , Figure 6 The box body 1 is fixedly connected with an air inlet 18 on the inner wall where the air inlet hole 3 is located, and the air inlet 18 is arranged in the second foam 13. The air inlet 18 includes a shell and a rotating shaft 19 rotatably connected to the shell, and a rotating rod 20 is fixedly connected to one end of the rotating shaft 19 close to the air duct 8, and a spiral tooth 21 is axially fixed on the rotating rod 20.

[0032] A spiral protrusion 22 is fixedly connected to the surface of the spiral tooth 21 close to the rotating rod 20 , so that the airflow blown into the box body 1 by the air inlet fan 18 flows along the spiral protrusion 22 .

[0033] Reference Figure 5 , Figure 7 A first transmission gear rod 27 , a second transmission gear rod 28 and a third transmission gear rod 29 are rotatably connected in the second foam 13 and meshed in sequence, wherein one end of the first transmission gear rod 27 meshes with the surface of the spiral tooth 21 away from the rotating rod 20 .

[0034] Reference Figure 2 , Figure 7 The side wall of the box body 1 is fixedly connected with an annular plate 23 near the cover plate 6, and the top corner of the inner side wall of the annular plate 23 is set as an arc-shaped fillet. An annular groove 24 is opened on the side of the annular plate 23 away from the cover plate 6, and a plurality of connecting rods 25 are slidably connected in the groove 24, and the connecting rods 25 extend away from the annular plate 23.

[0035] Reference Figure 7The ends of the connecting rods 25 away from the annular plate 23 are fixedly connected with a rack chain 26, the rack chain 26 is laid in an annular manner along the annular plate 23, and the rack chain 26 is provided with external teeth on one side close to the side wall of the box body 1. The third transmission gear rod 29 penetrates the second foam 13 and meshes with the rack chain 26, so that the air intake fan 18 can drive the rack chain 26 to rotate along the annular plate 23 after rotating.

[0036] Reference Figure 7 , Figure 8 A plurality of nozzles 30 are fixedly connected to one side of the rack chain 26 away from the tooth block, air inlets 31 are provided on both sides of the nozzles 30, and a nozzle 32 is provided at one end of the nozzle 30 away from the rack chain 26. The two air inlets 31 are respectively connected to the nozzle 32, and the two air inlets 31 are independent of each other.

[0037] The implementation principle of the embodiment of the present application is: when the battery management system 2 detects that the operating temperature of the battery module 7 is too high, the battery management system 2 drives the internal negative pressure fan 4 and the air intake fan 18 to rotate, the air intake fan 18 delivers external cold air into the box body 1, and the negative pressure fan 4 discharges the hot air in the box body 1.

[0038] When the external cold air enters the box body 1 through the air inlet 3, it flows through the spiral teeth 21 and along the spiral protrusions 22, so that the airflow entering the air duct 8 is vortex-shaped. After entering the air duct 8, the airflow flows along the third foam 15, part of the airflow flows out from the air outlet 11, and part of the airflow flows into the gap between the two third foams 15 and accelerates to flow into the arc groove 16.

[0039] After the air flows out of the air outlet 11, there are multiple flow routes, such as flowing into the heat dissipation slot 10, the gap between the battery module 7 and the inner wall of the box body 1, the negative pressure fan 4, and flowing into the gap between the battery module 7 and the air duct 8, and the negative pressure fan 4. In addition, the external cold air will also flow into the box body 1 from the ventilation hole 12, and its flow direction is the heat dissipation slot 10, the gap between the battery module 7 and the air duct 8, the negative pressure fan 4 or the gap between the battery module 7 and the inner wall of the box body 1, and the negative pressure fan 4, and thereby wrap the side of the battery cell 701.

[0040] During normal use, the gap between the battery module 7 and the cover plate 6 is small, and the wind blown out by the air duct 8 is difficult to flow into the gap between the battery module 7 and the cover plate 6 to dissipate the heat on the top of the battery module 7. In the present application, the air inlet fan 18 rotates to drive the spiral teeth 21 to rotate synchronously, and the spiral teeth 21 rotate to drive the nozzle 30 to slide along the edges of the two battery modules 7. Under the dual action of the air inlet fan 18 and the negative pressure fan 4, the air flow in the box 1 has a large flow rate and a fast flow rate of cold air. In addition, due to the diffusion of the air flow, part of the cold air flows into the air inlet 31 of the nozzle 30 during the sliding process of the nozzle 30, and the cold air is sprayed above the battery module 7 from the nozzle 32 to achieve heat dissipation on the top of the battery module 7.

[0041] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An air-cooled industrial and commercial energy storage battery, comprising a box (1), wherein a plurality of battery modules (7) are arranged in the box (1), wherein the battery module (7) comprises a plurality of battery cells (701) connected in sequence, and wherein a battery management system (2) for monitoring the temperature of the battery module (7) is arranged on the box (1), characterized in that: The front end of the box (1) is provided with an air inlet (3), the rear end of the box (1) is provided with a negative pressure fan (4) for discharging air in the box (1), the negative pressure fan (4) is electrically connected to the battery management system (2), an air duct (8) is provided between the two adjacent battery modules (7), the air duct (8) is connected to the air inlet (3), a gap is left between the two adjacent battery cells (701) and is provided as a heat dissipation groove (10), the surface of the air duct (8) is provided with air outlet holes (11) whose number is the same as the heat dissipation groove (10), the surface of the box (1) is provided with ventilation holes (12) whose number is the same as the air outlet holes (11), and the heat dissipation groove (10), the air outlet holes (11) and the ventilation holes (12) are provided in correspondence with each other.

2. The air-cooled industrial and commercial energy storage battery according to claim 1, characterized in that: First foams (9) are arranged on the inner walls of the heat dissipation groove (10) on opposite sides, and two adjacent first foams (9) abut against each other.

3. The air-cooled industrial and commercial energy storage battery according to claim 1, characterized in that: A second foam (13) is provided on the air duct (8), the second foam (13) covers the air inlet hole (3), and the second foam (13) is communicated with the inner cavity of the air duct (8).

4. The air-cooled industrial and commercial energy storage battery according to claim 3, characterized in that: A plurality of air guide plates (14) are arranged inside the second foam (13), and the air guide plates (14) are arranged to be inclined toward the air duct (8).

5. The air-cooled industrial and commercial energy storage battery according to claim 1, characterized in that: A third foam (15) is arranged in the air duct (8), and a plurality of arc-shaped grooves (16) which are consistent with the air outlet holes (11) are opened in the third foam (15), and the arc-shaped grooves (16) are connected with the air outlet holes (11).

6. The air-cooled industrial and commercial energy storage battery according to claim 1, characterized in that: The housing (1) is provided with an air inlet fan (18) at the air inlet hole (3); the air inlet fan (18) is electrically connected to the battery management system (2); a spiral tooth (21) is sleeved on the rotating shaft of the air inlet fan (18); and after the air inlet fan (18) is driven, air flows into the housing (1) along the surface of the spiral tooth (21).

7. The air-cooled industrial and commercial energy storage battery according to claim 6, characterized in that: The inner wall of the box body (1) is provided with an annular plate (23), an annular slide groove (24) is provided on the annular plate (23), an annular rack chain (26) is slidably arranged in the slide groove (24), a gear rod group is arranged in the box body (1), and the spiral teeth (21) and the rack chain (26) are linked via the gear rod group.

8. The air-cooled industrial and commercial energy storage battery according to claim 7, characterized in that: A plurality of nozzles (30) are arranged on the rack chain (26); an air inlet (31) is provided on a side wall of the nozzle (30); a nozzle (32) is provided on a side of the nozzle (30) away from the rack chain (26); and the air inlet (31) and the nozzle (32) are in communication.

Images