A liquid-cooled solid-state battery low-temperature protection box

Abstract

The present invention relates to the technical field of batteries, and specifically discloses a low-temperature protection box for a liquid-cooled solid-state battery, which includes a protection box with a square structure. A lower mounting plate is fixedly installed on the lower surface of the protection box, and an upper mounting plate is fixedly installed on the upper surface of the protection box. A battery pack arranged in a matrix and evenly arranged is installed inside the protection box. A heat sink plate in contact with the battery pack is fixedly installed on the upper surface of the lower mounting plate, and support ribs are fixedly installed on the inner side wall of the protection box. This low-temperature protection box for a liquid-cooled solid-state battery adopts a novel structural design. By utilizing the magnetic repulsive force between the lower magnet and the upper magnet and cooperating with the first spring, the piston plate reciprocates up and down inside the circulation box to achieve the purpose of blowing air. The blown air enters the inside of the protection box through the air duct, and finally is discharged from the exhaust duct, accelerating the air flow inside the protection box, thereby realizing air cooling on the basis of liquid cooling and maximizing the heat dissipation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly to a liquid-cooled solid-state battery low-temperature protection box body. Background Art

[0002] A battery protection box is a device for protecting batteries, usually used for storing and transporting batteries, especially lithium batteries, to prevent battery damage, short circuit, overheating, etc. At the same time, it can also prevent battery leakage to ensure safety. Since the battery protection box is generally a closed structure, it can generally be cooled by liquid cooling.

[0003] For example, in the prior art, a Chinese patent with the publication number CN116565373A discloses a liquid-cooled heat dissipation protection battery box, including: a battery box body, a battery mounting rack, and a liquid-cooled heat dissipation pipeline; the battery box body is composed of an upper protection plate, an intermediate composite layer, and a lower protection plate; the intermediate composite layer is successively composed of a honeycomb structure, a fractal hierarchical honeycomb structure, and a flame retardant from top to bottom; the honeycomb structure, the fractal hierarchical honeycomb structure, and the flame retardant are separated by partitions in the middle; the battery box body is also provided with liquid-cooled pipeline inlets and outlets; the liquid-cooled heat dissipation pipeline is filled with a three-period minimal surface structure, and its material is aluminum alloy.

[0004] Again, in the prior art, a Chinese patent with the publication number CN117810602A discloses an improved liquid-cooled battery pack; including an outer shell and battery blocks placed inside the outer shell, the outer shell includes a lower shell and an upper shell clamped at the upper end of the lower shell, and protective plates are provided on the left and right sides of the lower shell and the upper shell; a liquid-cooling tube mechanism is arranged inside the outer shell for cooling the battery blocks; by providing protective plates on both left and right sides, and air bags are arranged inside the protective plates, by squeezing the air bags on both sides, the fluidity of the coolant inside the first liquid-cooling tube and the second liquid-cooling tube can be increased, thereby dispersing the heat of multiple battery blocks to achieve the effect of timely cooling, and this structural setting does not require external power and can be completed only during the normal driving of an electric vehicle.

[0005] Again, in the prior art, a Chinese patent with the publication number CN109065788A discloses a battery box with an internal liquid-cooling system, including a tray main frame, a frame-shaped protective plate, and a liquid-cooling tube. The tray main frame is spliced by a front frame, a rear frame, a left frame, a right frame, and a bottom plate; the frame-shaped protective plate is arranged below the tray main frame, and the periphery of the frame-shaped protective plate is connected to the edge of the bottom plate; a plurality of bottom plate bosses are arranged at intervals on the lower surface of the bottom plate, and a card slot adapted to the diameter of the liquid-cooling tube is opened on the lower surface of the bottom plate boss, and the liquid-cooling tube is embedded in the card slot to realize its connection with the bottom plate; the periphery of the protective plate and the edge of the bottom plate are hermetically combined by welding; a foaming material is filled in the cavity formed between the bottom plate and the frame-shaped protective plate.

[0006] Combined with the above materials, it can be seen that in the prior art, coolant circulation is generally used to achieve the purpose of liquid cooling and heat dissipation. However, in the actual use process, due to the large amount of heat generated during battery charging and discharging, relying solely on liquid cooling for heat dissipation often fails to achieve the ideal heat dissipation effect (that is, there is air flow inside the battery box, and the heat dissipation speed is limited). Summary of the Invention

[0007] The purpose of the present invention is to provide a liquid-cooled solid-state battery low-temperature protection box to solve the problem of limited heat dissipation effect by relying solely on liquid cooling proposed in the above background technology.

[0008] To achieve the above purpose, the present invention provides the following technical solution: A liquid-cooled solid-state battery low-temperature protection box includes a protection box in a square structure. The lower surface of the protection box is fixedly installed with a lower mounting plate, and the upper surface of the protection box is fixedly installed with an upper mounting plate. It also includes:

[0009] Battery packs are installed inside the protection box in a matrix and evenly arranged manner. The upper surface of the lower mounting plate is fixedly installed with a heat sink plate in contact with the battery packs, and support ribs are fixedly installed on the inner side wall of the protection box;

[0010] A liquid-cooled copper tube is fixedly installed inside the protection box to fit the outer surface of the battery packs. The liquid-cooled copper tube is interconnected with a circulation box fixedly installed on the upper surface of the lower mounting plate. A delivery pump is installed between the circulation box and the liquid-cooled copper tube, and a refrigerator is fixedly installed on the lower surface inside the circulation box;

[0011] A blowing mechanism for driving the air flow inside the protection box is arranged at the upper end inside the circulation box. The upper surface of the upper mounting plate is fixedly installed with an exhaust duct cooperating with the blowing mechanism, and a filter dryer for air treatment is fixedly installed at the top of the exhaust duct;

[0012] A buffer airbag for protecting the battery packs is fixedly installed outside the side of the battery packs. A copper heat conduction plate is fixedly installed on the outer surface of the buffer airbag, and a warning mechanism for detecting battery bulging is arranged above the buffer airbag.

[0013] Preferably, the blowing mechanism includes a piston plate slidably installed horizontally inside the circulation box. A first spring is fixedly installed between the upper surface of the piston plate and the inner wall of the circulation box, and the piston plate penetrates and slides with the liquid-cooled copper tube.

[0014] Preferably, a blowing duct communicating with the protection box is fixedly installed on the side of the circulation box. The blowing duct is higher than the height of the piston plate, and a heat dissipation air duct is formed between the blowing duct and the exhaust duct.

[0015] Preferably, heat dissipation fins are fixedly installed on the outer surface of the protective box and are matched with the liquid-cooled copper tubes, and an upper magnet is fixedly installed on the lower surface of the piston plate, and the positions of the upper magnet and the lower magnet correspond to each other up and down.

[0016] Preferably, the lower magnet is fixedly installed between the rotating shaft rotatably installed inside the circulation tank, and a stirring blade for stirring the coolant is fixedly installed at the middle position of the rotating shaft, and the rotating shaft is driven to rotate by a driving motor.

[0017] Preferably, the warning mechanism includes a connecting pipe for connecting adjacent buffer air bags, and a pressure sensor is fixedly installed at the top end of the connecting pipe.

[0018] Preferably, a copper heat conduction plate is fixedly installed on the outer surface of the buffer air bag, and the connecting pipe connects four adjacent buffer air bags in series as a group.

[0019] Preferably, the pressure sensor and the warning lamp are electrically connected to each other, and the warning lamp is fixedly installed on the upper surface of the maintenance plate, and the maintenance plate and the upper mounting plate form a detachable mounting structure by bolts.

[0020] Preferably, a sealing strip is fixedly installed on the side surface of the maintenance plate, and a limiting clip block for clamping and fixing the battery pack is installed below the maintenance plate.

[0021] Preferably, a buffer sponge and a second spring are fixedly installed between the upper surface of the limiting clip block and the lower surface of the maintenance plate, and the buffer sponge and the second spring are elastically matched to protect the battery pack.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: The low-temperature protection box body of the liquid-cooled solid-state battery adopts a novel structural design, and the specific content is as follows:

[0023] 1. The coolant in the circulation tank is conveyed into the liquid-cooled copper tubes by a delivery pump to circulate, so as to achieve the purpose of cooling the battery pack inside the protective box. During this process, the refrigerator inside the circulation tank cools the coolant to ensure the subsequent liquid-cooling effect, and the driving motor drives the rotating shaft to rotate, so that the rotating shaft drives the stirring blade to rotate, thereby stirring the coolant inside the circulation tank and accelerating the cooling speed of the refrigerator for the coolant;

[0024] Furthermore, heat dissipation fins are arranged on the outer surface of the protective box, and heat conduction plates are arranged on the upper surface of the lower mounting plate and the lower surface of the battery pack. Utilizing the high heat conductivity of both, the heat dissipation is accelerated, and a better heat dissipation effect is achieved in cooperation with the liquid-cooled copper tubes;

[0025] Furthermore, during the rotation of the rotating shaft, the lower magnetic block fixedly installed therewith rotates synchronously, so that the magnetic repulsive force between the lower magnetic block and the upper magnetic block is used to cooperate with the first spring to make the piston plate reciprocate up and down inside the circulation box, achieving the purpose of blowing air. The blown air enters the protective box through the air duct and finally discharges from the exhaust duct, accelerating the air flow inside the protective box, thereby realizing air cooling on the basis of liquid cooling and maximizing the heat dissipation effect.

[0026] 2. The buffer air bags installed on the outer surface of the battery pack use the elastic buffering effect of the buffer air bags to protect the adjacent battery packs arranged in a row, preventing them from being damaged by mutual extrusion. And when a battery pack bulges, it will squeeze the buffer air bag. At this time, the pressure sensor installed outside the connecting pipe detects an increase in pressure and lights up the warning light at the corresponding position.

[0027] Further, the upper surface of the upper mounting plate is installed with closely arranged inspection plates by bolts. When a battery pack bulges and needs to be inspected and replaced, only the inspection plate at the corresponding position needs to be removed according to the warning light to realize the inspection operation, reducing the work difficulty. And the buffer springs and the second spring between the inspection plate and the limit clamping blocks can provide buffering force to effectively protect the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 is a schematic diagram of the arrangement structure of the battery packs of the present invention;

[0030] Figure 3 is a schematic diagram of the internal structure of the protective box of the present invention;

[0031] Figure 4 is a schematic diagram of the connection relationship between the liquid cooling copper pipe and the circulation box of the present invention;

[0032] Figure 5 is a schematic diagram of the internal structure of the circulation box of the present invention;

[0033] Figure 6 of the present invention Figure 5 is an enlarged schematic diagram of part A;

[0034] Figure 7 is a schematic diagram of the positional relationship between the upper magnetic block and the lower magnetic block of the present invention;

[0035] Figure 8 is a schematic diagram of the buffer air bag structure of the present invention;

[0036] Figure 9 is a schematic diagram of the lower surface structure of the upper mounting plate of the present invention;

[0037] Figure 10 This is a schematic structural diagram of the positional relationship between the limit clamping block and the maintenance plate of the present invention.

[0038] In the figure: 1. Protection box; 101. Heat dissipation fins; 2. Lower mounting plate; 3. Upper mounting plate; 4. Battery pack; 5. Heat dissipation plate; 6. Support rib; 7. Liquid cooling copper pipe; 8. Circulation tank; 9. Delivery pump; 10. Refrigerator; 11. Rotating shaft; 12. Stirring blade; 13. Driving motor; 14. Piston plate; 15. First spring; 16. Upper magnet; 17. Lower magnet; 18. Blower pipe; 19. Exhaust pipe; 20. Filter dryer; 21. Buffer airbag; 22. Heat conduction plate; 23. Connecting pipe; 24. Pressure sensor; 25. Maintenance plate; 2501. Sealing strip; 26. Warning light; 27. Limit clamping block; 28. Buffer sponge; 29. Second spring. Specific embodiments

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Embodiment 1: Please refer to Figures 1 - 4 , in order to achieve the purpose of liquid cooling and temperature reduction of the battery in this embodiment, the following technical solutions are provided, specifically disclosed: a protection box 1 with a square structure, a lower mounting plate 2 is fixedly installed on the lower surface of the protection box 1, and an upper mounting plate 3 is fixedly installed on the upper surface of the protection box 1. A battery pack 4 arranged in a matrix and evenly arranged is installed inside the protection box 1, and a heat dissipation plate 5 in contact with the battery pack 4 is fixedly installed on the upper surface of the lower mounting plate 2. And support ribs 6 are fixedly installed on the inner side wall of the protection box 1. A liquid cooling copper pipe 7 fitting the outer surface of the battery pack 4 is fixedly installed inside the protection box 1, and the liquid cooling copper pipe 7 is communicated with a circulation tank 8 fixedly installed on the upper surface of the lower mounting plate 2. And a delivery pump 9 is installed between the circulation tank 8 and the liquid cooling copper pipe 7. A refrigerator 10 is fixedly installed on the lower surface inside the circulation tank 8.

[0041] When using the device, first install the battery packs 4 evenly inside the protection box 1 and connect them in series with each other. At this time, the support ribs 6 on the inner wall of the protection box 1 are used to improve the strength of the protection box 1 to prevent the whole from being squeezed and deformed under force. At the same time, the delivery pump 9 above the circulation tank 8 is used to pump the coolant in the circulation tank 8 into the liquid cooling copper pipe 7 for circulating flow, so as to achieve the purpose of heat exchange and cooling of the battery pack 4 inside the protection box 1. At the same time, the refrigerator 10 inside the circulation tank 8 is turned on to cool the coolant by the refrigerator 10 to ensure the heat exchange effect of the coolant.

[0042] Embodiment 2: Please refer toFigures 5 - 7 In this embodiment, in order to solve the problem that the traditional device cannot achieve the best cooling effect only by liquid cooling, the following technical solution is provided. While liquid cooling, air flow is increased. Specifically, it is disclosed that: at the upper end inside the circulation box 8, there is a blower mechanism for driving the air flow inside the protection box 1. And on the upper surface of the upper mounting plate 3, an exhaust duct 19 cooperating with the blower mechanism is fixedly installed. And at the top of the exhaust duct 19, a filter dryer 20 for air treatment is fixedly installed. The blower mechanism includes a piston plate 14 slidably mounted horizontally inside the circulation box 8. And between the upper surface of the piston plate 14 and the inner wall of the circulation box 8, a first spring 15 is fixedly installed. And the piston plate 14 is slidably penetrated with the liquid cooling copper tube 7. On the side of the circulation box 8, a blower duct 18 communicating with the protection box 1 is fixedly installed. And the blower duct 18 is higher than the height of the piston plate 14. And a heat dissipation air duct is formed between the blower duct 18 and the exhaust duct 19. On the outer surface of the protection box 1, heat dissipation fins 101 cooperating with the liquid cooling copper tube 7 are fixedly installed. And on the lower surface of the piston plate 14, an upper magnet 16 is fixedly installed. And the positions of the upper magnet 16 and the lower magnet 17 correspond to each other up and down. The lower magnet 17 is fixedly installed with the rotating shaft 11 rotatably installed inside the circulation box 8. And at the middle position of the rotating shaft 11, a stirring blade 12 for stirring the coolant is fixedly installed. And the rotating shaft 11 is driven to rotate by a driving motor 13.

[0043] During the process of circulating cooling, the driving motor 13 is turned on. The driving motor 13 is used to drive the rotating shaft 11 inside the circulation box 8 to rotate. The rotating shaft 11 is used to drive the stirring blade 12 to rotate, so that the stirring blade 12 stirs the coolant inside the circulation box 8, thereby accelerating the cooling speed of the cooler 10 for the coolant. During the rotation of the rotating shaft 11, the lower magnet 17 fixedly installed with it rotates synchronously. When the magnetic pole of the lower magnet 17 rotates to the upper side, the piston plate 14 is pushed upward by the magnetic repulsion force between it and the upper magnet 16. Then, in cooperation with the first spring 15, the piston plate 14 is reset. In this way, the piston plate 14 reciprocates up and down to achieve the purpose of blowing air. The blown air enters the protection box 1 through the blower duct 18 and is finally discharged from the exhaust duct 19 above the upper mounting plate 3 (the filter dryer 20 at the front end of the exhaust duct 19 filters the dust and moisture in the air when inhaling the air), thereby forming an air flow air duct, accelerating the air flow inside the protection box 1, and cooperating with the liquid cooling copper tube 7 to achieve the best cooling effect.

[0044] Example Three: Please refer to Figures 8 - 10, in order to solve the problem of troublesome maintenance operation of traditional devices, the following technical solutions are provided. The early warning mechanism is used to accurately locate the problematic battery pack 4. Specifically, it is disclosed that: a buffer airbag 21 for protecting it is fixedly installed on the outer side of the battery pack 4, and a copper heat conduction plate 22 is fixedly installed on the outer surface of the buffer airbag 21. And above the buffer airbag 21, there is an early warning mechanism for detecting battery bulging. The early warning mechanism includes a connecting pipe 23 for connecting adjacent buffer airbags 21. And at the top of the connecting pipe 23, a pressure sensor 24 is fixedly installed. A copper heat conduction plate 22 is fixedly installed on the outer surface of the buffer airbag 21. And the connecting pipe 23 connects four adjacent buffer airbags 21 in series as a group. The pressure sensor 24 and the indicator light 26 are electrically connected to each other. And the indicator light 26 is fixedly installed on the upper surface of the maintenance board 25. And the maintenance board 25 and the upper mounting plate 3 form a dismountable mounting structure by bolts. A sealing strip 2501 is fixedly installed on the side of the maintenance board 25. And below the maintenance board 25, there is a limit clamping block 27 for clamping and fixing the battery pack 4. Between the upper surface of the limit clamping block 27 and the lower surface of the maintenance board 25, a buffer sponge 28 and a second spring 29 are fixedly installed. The buffer sponge 28 and the second spring 29 are elastically matched to protect the battery pack 4.

[0045] When installing the battery pack 4, the buffer airbag 21 outside the battery pack 4 is used to buffer and protect the battery pack 4 at adjacent positions to avoid extrusion damage. At the same time, a copper heat conduction plate 22 is arranged on the outer surface of the buffer airbag 21 to quickly conduct the heat of the battery pack 4 through the heat conduction plate 22. When a certain battery pack 4 is damaged and bulges, the expanded volume will squeeze the buffer airbag 21, causing the air in the buffer airbag 21 to enter the connecting pipe 23. At this time, the pressure sensor 24 installed at the top of the connecting pipe 23 detects the increased pressure, turns on the indicator light 26 at the corresponding position and notifies the background through a wireless signal to remind that maintenance is needed. When the staff conducts maintenance, they can accurately locate which row of battery packs 4 need to be maintained according to the lit indicator light 26. Then, the corresponding maintenance board 25 is opened to perform the maintenance operation (a limit clamping block 27 is arranged below the maintenance board 25, and the battery pack 4 is clamped and fixed by the limit clamping block 27 during installation. At the same time, the buffer sponge 28 and the second spring 29 between the limit clamping block 27 and the maintenance board 25 provide elastic buffer protection). In this process, it is not necessary to completely remove the upper mounting plate 3.

[0046] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0047] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can 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-cooled solid-state battery low-temperature protection box, comprising a protection box (1) in a square structure, a lower mounting plate (2) fixedly mounted on the lower surface of the protection box (1), and an upper mounting plate (3) fixedly mounted on the upper surface of the protection box (1), characterized in that: Also includes: The protection box (1) has battery packs (4) evenly arranged in a matrix pattern installed inside, a heat spreader (5) in contact with the battery packs (4) is fixedly installed on the upper surface of the lower mounting plate (2), and supporting ribs (6) are fixedly installed on the inner side wall of the protection box (1); A liquid cooling copper tube (7) is fixedly mounted inside the protection box (1) and is in contact with the outer surface of the battery pack (4); the liquid cooling copper tube (7) is connected to a circulation box (8) fixedly mounted on the upper surface of the lower mounting plate (2); a delivery pump (9) is mounted between the circulation box (8) and the liquid cooling copper tube (7); and a refrigerator (10) is fixedly mounted on the lower surface of the circulation box (8); The upper end of the circulation box (8) is provided with a blower mechanism for driving the air flow inside the protection box (1), and an exhaust pipe (19) cooperating with the blower mechanism is fixedly mounted on the upper surface of the upper mounting plate (3), and a filter dryer (20) for air treatment is fixedly mounted on the top of the exhaust pipe (19); A buffer airbag (21) for protecting the battery pack (4) is fixedly mounted on the outside of the side surface thereof, and an early warning mechanism for detecting battery bulging is arranged above the buffer airbag (21); The air blowing mechanism comprises a piston plate (14) which is laterally slidably mounted inside a circulation box (8), a first spring (15) is fixedly mounted between an upper surface of the piston plate (14) and an inner wall of the circulation box (8), and the piston plate (14) and the liquid-cooling copper tube (7) are slidably penetrated; A blast pipe (18) is fixedly mounted on the side of the circulation box (8) and is in communication with the protection box (1), and the blast pipe (18) is higher than the height of the piston plate (14), and a heat dissipation air duct is formed between the blast pipe (18) and the exhaust pipe (19); The outer surface of the protection box (1) is fixedly mounted with a heat dissipation fin (101) that cooperates with the liquid-cooled copper tube (7), and the lower surface of the piston plate (14) is fixedly mounted with an upper magnetic block (16), and the positions of the upper magnetic block (16) and the lower magnetic block (17) correspond to each other in the upper and lower directions; The lower magnetic block (17) is fixedly mounted between a rotating shaft (11) rotatably mounted inside the circulation box (8), a stirring blade (12) for stirring the coolant is fixedly mounted in the middle of the rotating shaft (11), and the rotating shaft (11) is driven to rotate by a driving motor (13).

2. A liquid-cooled solid-state battery low-temperature protection box according to claim 1, characterized in that: The early warning mechanism comprises a connecting tube (23) for connecting adjacent buffer airbags (21), and a pressure sensor (24) is fixedly mounted on the top end of the connecting tube (23).

3. A liquid-cooled solid-state battery low-temperature protection box according to claim 2, characterized in that: A copper heat conducting plate (22) is fixedly mounted on the outer surface of the buffer airbag (21), and the connecting pipe (23) connects four adjacent buffer airbags (21) in series into a group.

4. The liquid-cooled solid-state battery low-temperature protection box according to claim 3, characterized in that: The pressure sensor (24) and the warning light (26) are electrically connected to each other, and the warning light (26) is fixedly mounted on the upper surface of the inspection plate (25), and the inspection plate (25) is connected to the upper mounting plate (3) by bolts to form a disassembly and installation structure.

5. The liquid-cooled solid-state battery low-temperature protection box according to claim 4, characterized in that: A sealing strip (2501) is fixedly mounted on the side of the inspection plate (25), and a limiting clamp (27) for clamping and fixing the battery pack (4) is mounted below the inspection plate (25).

6. The liquid-cooled solid-state battery low-temperature protection box according to claim 5, characterized in that: A buffer sponge (28) and a second spring (29) are fixedly mounted between the upper surface of the limit clamp (27) and the lower surface of the inspection plate (25), and the buffer sponge (28) and the second spring (29) are elastically matched to protect the battery pack (4).

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