Liquid-cooled solid-state battery low-temperature protection box body

Abstract

The invention relates to the technical field of batteries, and particularly discloses a liquid-cooled solid-state battery low-temperature protection box which comprises a protection box of a square structure, a lower mounting plate is fixedly mounted on the lower surface of the protection box, an upper mounting plate is fixedly mounted on the upper surface of the protection box, and battery packs which are uniformly arranged in a matrix manner are mounted in the protection box. A soaking plate in contact with the battery pack is fixedly mounted on the upper surface of the lower mounting plate, and supporting ribs are fixedly mounted on the inner side wall of the protection box. According to the low-temperature protection box body for the liquid-cooled solid-state battery, a novel structural design is adopted, a piston plate reciprocates up and down in the circulation box by utilizing the magnetic repulsive force effect between a lower magnetic block and an upper magnetic block in cooperation with a first spring, the purpose of air blowing is achieved, and blown air enters the protection box through an air blowing pipe and is finally exhausted from an exhaust pipe; and air flow in the protection box is accelerated, so that air cooling is realized on the basis of liquid cooling, and the heat dissipation effect is improved to the greatest extent.

Description

Technical Field

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

[0002] A battery protection box is a device used to protect batteries. It is usually used to store and transport batteries, especially lithium batteries, to prevent battery damage, short circuits, overheating, etc. It can also prevent battery leakage to ensure safety. Since the battery protection box is generally a closed structure, it can generally dissipate heat through liquid cooling.

[0003] As in the prior art, a Chinese patent with publication number CN116565373A discloses a liquid-cooled protective battery box, comprising: a battery box body, a battery mounting frame, and a liquid-cooled heat dissipation pipe; the battery box body is composed of an upper protective plate, an intermediate composite interlayer, and a lower protective plate; the intermediate composite interlayer is composed of a honeycomb structure, a fractal layered honeycomb structure, and a flame retardant from top to bottom; the honeycomb structure, the fractal layered honeycomb structure, and the flame retardant are separated by a partition; the battery box body is also provided with a liquid cooling pipe inlet and outlet; the liquid cooling heat dissipation pipe is filled with a three-period minimal surface structure, and its material is aluminum alloy.

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

[0005] As another example in the prior art, a Chinese patent with publication number CN109065788A discloses a battery box with a built-in liquid cooling system, comprising a tray main frame, a frame-type protective plate, and a liquid cooling pipe, wherein the tray main frame is formed by splicing a front frame, a rear frame, a left frame, a right frame, and a bottom plate; the frame-type protective plate is arranged below the tray main frame, and the frame-type protective plate is connected to the edge of the bottom plate on all sides; a plurality of bottom plate bosses are arranged at intervals on the lower surface of the bottom plate, and a card groove matching the diameter of the liquid cooling pipe is provided on the lower surface of the bottom plate boss, and the liquid cooling pipe is embedded in the card groove to realize its connection with the bottom plate; the protective plate is sealed and combined with the edge of the bottom plate on all sides by welding; the cavity formed between the bottom plate and the frame-type protective plate is filled with foaming material.

[0006] Based on 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 actual use, due to the large amount of heat generated by the battery during charging and discharging, liquid cooling alone often cannot achieve the ideal heat dissipation effect (i.e., there is air flow inside the battery box, and the heat dissipation rate is limited). Summary of the invention

[0007] The object of the present invention is to provide a liquid-cooled solid-state battery low-temperature protection box to solve the problem in the above-mentioned background technology that the heat dissipation effect of liquid cooling alone is limited.

[0008] To achieve the above object, the present invention provides the following technical solution: a liquid-cooled solid-state battery low-temperature protection box, comprising a square-shaped protection box, a lower mounting plate fixedly mounted on the lower surface of the protection box, and an upper mounting plate fixedly mounted on the upper surface of the protection box, and further comprising: The protective box is internally mounted with battery packs evenly arranged in a matrix, and a heat spreader in contact with the battery packs is fixedly mounted on the upper surface of the lower mounting plate, and supporting ribs are fixedly mounted on the inner side wall of the protective box; A liquid cooling copper tube is fixedly installed inside the protection box and is in contact with the outer surface of the battery pack. The liquid cooling copper tube is connected to 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 cooling copper tube. A refrigerator is fixedly installed on the lower surface of the circulation box. The upper end of the circulation box is provided with a blower mechanism for driving the air flow inside the protection box, and an exhaust pipe cooperating with the blower mechanism is fixedly installed on the upper surface of the upper mounting plate, and a filter dryer for air treatment is fixedly installed on the top of the exhaust pipe; A buffer airbag is fixedly mounted on the outside of the side of the battery pack for protection, and a copper heat conducting plate is fixedly mounted on the outer surface of the buffer airbag. An early warning mechanism for detecting battery bulging is arranged above the buffer airbag.

[0009] Preferably, the blowing mechanism includes a piston plate installed in a transverse sliding manner inside the circulation box, and 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 slides through the liquid-cooling copper tube.

[0010] Preferably, a blast pipe interconnected with the protection box is fixedly installed on the side of the circulation box, and the blast pipe is higher than the height of the piston plate, and a heat dissipation air duct is formed between the blast pipe and the exhaust pipe.

[0011] Preferably, a heat dissipation fin cooperating with the liquid-cooled copper tube is fixedly mounted on the outer surface of the protection box, and an upper magnetic block is fixedly mounted on the lower surface of the piston plate, and the positions of the upper magnetic block and the lower magnetic block correspond to each other up and down.

[0012] Preferably, the lower magnetic block is fixedly installed between a rotating shaft rotatably installed inside the circulation box, 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.

[0013] Preferably, the warning mechanism comprises a connecting tube for connecting adjacent buffer airbags, and a pressure sensor is fixedly mounted on the top end of the connecting tube.

[0014] Preferably, a copper heat conducting plate is fixedly mounted on the outer surface of the buffer airbag, and the connecting pipe connects four adjacent buffer airbags in series into a group.

[0015] Preferably, the pressure sensor and the warning light are electrically connected to each other, and the warning light is fixedly mounted on the upper surface of the inspection plate, and the inspection plate is connected to the upper mounting plate by bolts to form a disassembly and mounting structure.

[0016] Preferably, a sealing strip is fixedly installed on the side of the inspection plate, and a limiting clamp block for clamping and fixing the battery pack is installed under the inspection plate.

[0017] Preferably, a buffer sponge and a second spring are fixedly installed between the upper surface of the limit clamp block and the lower surface of the inspection plate, and the buffer sponge and the second spring are elastically matched to protect the battery pack.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the liquid-cooled solid-state battery low-temperature protection box adopts a new structural design, the specific contents of which are as follows: 1. The coolant in the circulation box is transported to the liquid cooling copper tube through the delivery pump for circulation, so as to achieve the purpose of cooling the battery pack inside the protective box. During this process, the refrigerator inside the circulation box 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 box and accelerating the cooling speed of the coolant by the refrigerator; Furthermore, the outer surface of the protective box is provided with heat dissipation fins, and the lower surface of the battery pack and the upper surface of the lower mounting plate are provided with heat spreaders, which utilize the high thermal conductivity of both to accelerate the dissipation of heat, and cooperate with the liquid cooling copper tube to achieve a better heat dissipation effect; Furthermore, the rotating shaft drives the lower magnetic block fixed thereto to rotate synchronously during the rotation process, so that the magnetic repulsion between the lower magnetic block and the upper magnetic block cooperates with the first spring to make the piston plate move back and forth up and down inside the circulation box, thereby achieving the purpose of blowing air. The blown air enters the protective box through the blower pipe and is finally discharged from the exhaust pipe, which speeds up the air flow inside the protective box, thereby realizing air cooling on the basis of liquid cooling and maximizing the heat dissipation effect.

[0019] 2. The buffer airbag installed on the outer surface of the battery pack uses its elastic buffering effect to protect the adjacent battery packs to prevent them from being squeezed and damaged. When the battery pack bulges, it will squeeze the buffer airbag. At this time, the pressure sensor installed on the outside of the connecting pipe detects the pressure increase and lights up the warning light at the corresponding position. Furthermore, a closely arranged inspection plate is installed on the upper surface of the upper mounting plate by means of bolts. When a battery pack has a bulge and needs to be inspected and replaced, the inspection operation can be performed by simply removing the inspection plate at the corresponding position according to the prompt light, thereby reducing the difficulty of the work. In addition, the buffer spring and the second spring between the inspection plate and the limit clamp can provide a buffer force to effectively protect the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the battery pack arrangement structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the protection box of the present invention; Figure 4 This is a schematic diagram of the connection relationship between the liquid cooling copper tube and the circulation box of the present invention; Figure 5 This is a schematic diagram of the internal structure of the circulation box of the present invention; Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle; Figure 7 This is a schematic diagram of the positional relationship between the upper magnetic block and the lower magnetic block of the present invention; Figure 8 This is a schematic diagram of the structure of the cushioning airbag of the present invention; Fig. 9 This is a schematic diagram of the lower surface structure of the upper mounting plate of the present invention; Fig.10 It is a structural schematic diagram of the position relationship between the limit clamp block and the inspection plate of the present invention.

[0021] In the figure: 1. protective box; 101. heat dissipation fins; 2. lower mounting plate; 3. upper mounting plate; 4. battery pack; 5. heat spreader; 6. support ribs; 7. liquid cooling copper tube; 8. circulation box; 9. delivery pump; 10. refrigerator; 11. rotating shaft; 12. stirring blades; 13. drive motor; 14. piston plate; 15. first spring; 16. upper magnetic block; 17. lower magnetic block; 18. blast pipe; 19. exhaust pipe; 20. filter dryer; 21. cushion airbag; 22. heat conduction plate; 23. connecting pipe; 24. pressure sensor; 25. inspection panel; 2501. sealing strip; 26. warning light; 27. limit clamp; 28. cushion sponge; 29. ​​second spring. DETAILED DESCRIPTION

[0022] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figure 1-Figure 4 In order to achieve the purpose of liquid cooling of the battery, the present embodiment provides the following technical solutions, which specifically disclose: a protective box 1 with a square structure, a lower mounting plate 2 is fixedly installed on the lower surface of the protective box 1, and an upper mounting plate 3 is fixedly installed on the upper surface of the protective box 1, battery packs 4 arranged evenly in a matrix are installed inside the protective box 1, and a heat spreader 5 in contact with the battery pack 4 is fixedly installed on the upper surface of the lower mounting plate 2, and supporting ribs 6 are fixedly installed on the inner wall of the protective box 1, a liquid-cooling copper tube 7 that fits the outer surface of the battery pack 4 is fixedly installed inside the protective box 1, and the liquid-cooling copper tube 7 is connected to a circulation box 8 fixedly installed on the upper surface of the lower mounting plate 2, and a delivery pump 9 is installed between the circulation box 8 and the liquid-cooling copper tube 7, and a refrigerator 10 is fixedly installed on the lower surface of the circulation box 8.

[0024] When using the device, first install the battery packs 4 evenly inside the protective box 1 and connect them in series. At this time, use the support ribs 6 on the inner wall of the protective box 1 to increase the strength of the protective box 1 to prevent the overall force from being squeezed and deformed. At the same time, the delivery pump 9 above the circulation box 8 uses the delivery pump 9 to transport the coolant in the circulation box 8 to the liquid-cooled copper tube 7 for circulation, so as to achieve the purpose of heat exchange and cooling of the battery pack 4 inside the protective box 1. At the same time, turn on the refrigerator 10 inside the circulation box 8, and use the refrigerator 10 to cool the coolant to ensure the heat exchange effect of the coolant.

[0025] Example 2: Please refer to Figure 5-Figure 7In order to solve the problem that the traditional device cannot achieve the best cooling effect by liquid cooling alone, this embodiment provides the following technical solutions to increase air flow while performing liquid cooling. Specifically, it discloses that: a blowing mechanism for driving the air flow inside the protective box 1 is arranged at the upper end of the circulation box 8, and an exhaust pipe 19 cooperating with the blowing mechanism is fixedly installed on the upper surface of the upper mounting plate 3, and a filter dryer 20 for air treatment is fixedly installed on the top of the exhaust pipe 19. The blowing mechanism includes a piston plate 14 installed in a transverse sliding manner inside the circulation box 8, and a first spring 15 is fixedly installed between the upper surface of the piston plate 14 and the inner wall of the circulation box 8, and a spring 15 is inserted between the piston plate 14 and the liquid-cooled copper tube 7. Sliding, a blower pipe 18 connected to the protective box 1 is fixedly installed on the side of the circulation box 8, and the blower pipe 18 is higher than the height of the piston plate 14, and a heat dissipation duct is formed between the blower pipe 18 and the exhaust pipe 19, and a heat dissipation fin 101 matched with the liquid-cooled copper tube 7 is fixedly installed on the outer surface of the protective box 1, and an upper magnetic block 16 is fixedly installed on the lower surface of the piston plate 14, and the positions of the upper magnetic block 16 and the lower magnetic block 17 correspond to each other up and down, the lower magnetic block 17 is fixedly installed between the rotating shaft 11 rotatably installed inside the circulation box 8, and a stirring blade 12 for stirring the coolant is fixedly installed in the middle position of the rotating shaft 11, and the rotating shaft 11 is driven to rotate by a driving motor 13.

[0026] During the circulation cooling process, the driving motor 13 is turned on, and the driving motor 13 is used to drive the rotating shaft 11 inside the circulation box 8 to rotate, and 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 coolant by the refrigerator 10. During the rotation process, the rotating shaft 11 drives the lower magnetic block 17 fixed thereto to rotate synchronously. When the magnetic pole of the lower magnetic block 17 rotates to the upper side, the magnetic repulsion between it and the upper magnetic block 16 is used to push the piston plate 14 to move upward, and then the first spring 15 is used to reset the piston plate 14. In this way, the piston plate 14 reciprocates up and down to achieve the purpose of blowing. The blown air enters the protection box 1 through the blast pipe 18, and is finally discharged from the exhaust pipe 19 above the upper mounting plate 3 (the filter dryer 20 at the front end of the exhaust pipe 19 filters dust and moisture in the air when inhaling air), thereby forming an air duct for air flow, accelerating the air flow inside the protection box 1, and cooperating with the liquid-cooled copper tube 7 to achieve the best cooling effect.

[0027] Example 3: Please refer to Figure 8-Figure 10In order to solve the problem of troublesome maintenance operation of traditional devices, this embodiment provides the following technical solutions, using the early warning mechanism to accurately locate the battery pack 4 with problems, specifically disclosed: a buffer airbag 21 for protecting the battery pack 4 is fixedly installed on the outside of the side of the battery pack 4, and a copper heat conductive plate 22 is fixedly installed on the outer surface of the buffer airbag 21, and an early warning mechanism for detecting battery bulging is arranged above the buffer airbag 21, the early warning mechanism includes a connecting pipe 23 for connecting adjacent buffer airbags 21, and a pressure sensor 24 is fixedly installed on the top of the connecting pipe 23, a copper heat conductive plate 22 is fixedly installed on the outer surface of the buffer airbag 21, and the The connecting pipe 23 connects four adjacent buffer airbags 21 in series into a group, the pressure sensor 24 and the warning light 26 are electrically connected to each other, and the warning light 26 is fixedly installed on the upper surface of the inspection plate 25, and the inspection plate 25 is bolted to form a disassembly and installation structure with the upper mounting plate 3, a sealing strip 2501 is fixedly installed on the side of the inspection plate 25, and a limit clamp 27 for clamping and fixing the battery pack 4 is installed under the inspection plate 25, a buffer sponge 28 and a second spring 29 are fixedly installed 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.

[0028] 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 the adjacent position to avoid being squeezed and damaged. At the same time, a copper heat conducting plate 22 is arranged on the outer surface of the buffer airbag 21, and the heat of the battery pack 4 is quickly discharged by the heat conducting plate 22. When a battery pack 4 is damaged and bulged, the expanded volume will squeeze the buffer airbag 21, so that the air in the buffer airbag 21 enters the connecting tube 23. At this time, the pressure sensor 24 installed at the top of the connecting tube 23 detects the pressure increase and opens the corresponding position. The warning light 26 notifies the background through wireless signals to remind that maintenance is needed. When the staff performs maintenance, they can accurately locate which row of battery packs 4 needs maintenance according to the lit warning light 26, and then open the corresponding maintenance plate 25 to squeeze and perform maintenance operations (a limit clamp 27 is provided under the maintenance plate 25. During installation, the limit clamp 27 is used to clamp and fix the battery pack 4. At the same time, the buffer sponge 28 and the second spring 29 between the limit clamp 27 and the maintenance plate 25 provide elastic buffer protection). In this process, there is no need to completely remove the upper mounting plate 3.

[0029] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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).

2. A liquid-cooled solid-state battery low-temperature protection box according to claim 1, characterized in that: 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 the upper surface of the piston plate (14) and the inner wall of the circulation box (8), and the piston plate (14) and the liquid-cooling copper tube (7) are slidably penetrated.

3. A liquid-cooled solid-state battery low-temperature protection box according to claim 2, characterized in that: A blast pipe (18) which is in communication with the protection box (1) is fixedly mounted on the side of the circulation box (8), the blast pipe (18) being 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).

4. The liquid-cooled solid-state battery low-temperature protection box according to claim 3, characterized in that: 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.

5. The liquid-cooled solid-state battery low-temperature protection box according to claim 4, characterized in that: The lower magnetic block (17) is fixedly mounted between a rotating shaft (11) rotatably mounted inside the circulation box (8), and 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).

6. The 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).

7. The liquid-cooled solid-state battery low-temperature protection box according to claim 6, 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.

8. The liquid-cooled solid-state battery low-temperature protection box according to claim 6, 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.

9. The liquid-cooled solid-state battery low-temperature protection box according to claim 8, 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).

10. The liquid-cooled solid-state battery low-temperature protection box according to claim 9, 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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