Battery Pack and Vehicle

Abstract

The present application relates to the technical field of batteries, and provides a battery pack and a vehicle. According to the battery pack provided by the present application, the battery pack uses a cooling medium accommodated in the outer box body of the battery pack as a cooling medium, and through a spraying assembly, sprays the cooling medium into the battery body accommodated in the cavity of the outer box body of the battery pack in a spraying manner, so as to cool the battery body. The cooling medium sprayed onto the surface of the battery body flows downward from the outside of the battery body to the bottom of the outer box body, and can be conveyed to the corresponding nozzle again via a conveying pipeline, thereby forming a cycle of the cooling medium.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery pack and a vehicle. Background Art

[0002] In recent years, the new energy vehicle industry has developed rapidly, but the safety issue of batteries has always been the focus of attention in the industry. Lithium-ion batteries are widely used in new energy vehicles due to their advantages such as high energy density and environmental friendliness, but there are also risks of poor heat dissipation and spontaneous combustion. When the battery overheats or is damaged, chemical reactions will occur among the internal electrolyte, negative electrode and positive electrode materials, generating a large amount of heat and gas, which will ultimately lead to the violent expansion, rupture and even spontaneous combustion of the battery.

[0003] In the current technology, air cooling is often used for cooling, but air cooling has the following defects: it is difficult to uniformly cool all angles of the battery; the lithium battery packs inside the battery are arranged closely, and heat is easily accumulated but difficult to dissipate. These defects result in low air cooling efficiency and it is difficult to effectively suppress the excessive temperature inside the battery. Summary of the Invention

[0004] In view of this, the present application provides a battery pack and a vehicle, aiming to solve the above technical problems to a certain extent.

[0005] According to a first aspect of the present application, a battery pack is provided, and the battery pack includes:

[0006] An outer box body, the outer box body has a cavity, and a cooling medium is accommodated in the cavity;

[0007] A battery body, the battery body is accommodated inside the cavity;

[0008] A spraying assembly, the spraying assembly includes a plurality of delivery pipelines, and the spraying assembly further includes a plurality of nozzles provided for each delivery pipeline. The plurality of delivery pipelines are used for circulating the cooling medium, and the plurality of nozzles are used for spraying the cooling medium onto the battery body;

[0009] Wherein, the plurality of delivery pipelines can be lifted to adjust the height where the plurality of nozzles are located.

[0010] On the basis of the above technical solutions, optionally, the battery pack further includes a cooling assembly, and a part of the cooling assembly is arranged inside the cavity. The cooling assembly is in contact with the cooling medium to cool the cooling medium.

[0011] On the basis of any of the above technical solutions, optionally, the battery pack further includes a cooling assembly, and the cooling assembly includes:

[0012] A heat conduction structure, the heat conduction structure is arranged in the cavity, and the heat conduction structure is in contact with the cooling medium;

[0013] A heat dissipation structure, the heat dissipation structure is arranged on the outer side of the outer box body, and the heat dissipation structure exchanges heat with the heat conduction structure to reduce the temperature of the heat conduction structure.

[0014] Based on any of the above technical solutions, optionally, the battery pack further includes a pressing strip, the pressing strip is movably connected to the outer box body, the battery body has a concave portion, the pressing strip can move relative to the outer box body and be embedded in the concave portion, and the pressing strip can also move relative to the outer box body to disengage from the concave portion.

[0015] Based on any of the above technical solutions, optionally, the battery pack further includes a rotating shaft, the rotating shaft is movably connected to the outer box body, the battery pack further includes a worm wheel and a worm that mesh with each other, and the worm wheel is coaxially connected to the rotating shaft.

[0016] Based on any of the above technical solutions, optionally, the battery pack further includes a layer board arranged in the cavity, and the layer board is detachably connected to the battery body;

[0017] Wherein, the battery pack further includes a sealing ring sleeved on the outer side of the battery body, and the sealing ring is used to seal the gap between the layer board and the battery body.

[0018] Based on any of the above technical solutions, optionally, the outer box body includes a plurality of air guiding holes, the air guiding holes penetrate through the outer box body, and the height of the air guiding holes is higher than that of the layer board.

[0019] Based on any of the above technical solutions, optionally, the battery pack further includes a bottom support member, and the bottom support member supports the bottom of the outer box body.

[0020] Based on any of the above technical solutions, optionally, the battery pack further includes a supporting bottom frame arranged in the cavity, the battery body is mounted on the supporting bottom frame, and the number of the battery bodies is multiple and they are spaced apart by the supporting bottom frame.

[0021] According to a second aspect of the present application, a vehicle is provided, and the vehicle includes the battery pack as described above.

[0022] According to the battery pack provided by the present application, the battery pack uses the cooling medium contained in the outer box of the battery pack as a cooling medium, and through the spraying assembly, sprays the cooling medium onto the battery body contained in the cavity of the outer box of the battery pack in a spraying manner, so as to cool the battery body. The cooling medium sprayed on the surface of the battery body flows downward from the outside of the battery body to the bottom of the outer box, and can be transported to the corresponding nozzle again via the conveying pipeline, thereby forming a cycle of the cooling medium.

[0023] According to the battery pack provided by the present application, compared with the air-cooled battery pack in the prior art, the battery pack provided by the embodiments of the present application contains a cooling medium inside, and adopts a spraying method to cool the battery body in the battery pack, effectively improving the cooling effect on the battery body. At the same time, the multiple conveying pipelines of the spraying assembly can be lifted, so as to provide a more comprehensive spraying on the outside of the battery body, increase the spraying area on the outside of the battery body, and improve the cooling effect of spraying cooling.

[0024] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0026] Figure 1 Schematic diagram showing a three-dimensional view of the battery pack provided by the embodiment of the present application.

[0027] Figure 2 Schematic diagram showing a three-dimensional view of the battery pack provided by the embodiment of the present application with some structures omitted.

[0028] Figure 3 Schematic diagram showing another three-dimensional view of the battery pack provided by the embodiment of the present application with some structures omitted.

[0029] Figure 4 Schematic diagram showing another three-dimensional view of the battery pack provided by the embodiment of the present application with some structures omitted.

[0030] Figure 5 Schematic diagram showing a three-dimensional view of the heat conduction structure and other structures of the battery pack provided by the embodiment of the present application.

[0031] Figure 6The schematic diagram shows a three-dimensional view of the spraying assembly of the battery pack provided according to an embodiment of the present application.

[0032] Figure 7 The schematic diagram shows a three-dimensional view of a partial structure of the battery pack provided according to an embodiment of the present application.

[0033] Figure 8 Shows Figure 7 The schematic diagram of the enlarged view at position A in

[0034] Figure 9 The schematic diagram shows a three-dimensional view of the supporting chassis.

[0035] Figure 10 The schematic diagram shows a three-dimensional view of the battery body.

[0036] Reference numerals:

[0037] 1 - Outer box body; 2 - New energy battery body; 3 - Laminate; 4 - Supporting chassis; 5 - Liquid extraction pump; 6 - Liquid extraction pipe; 7 - Connecting hose; 8 - Delivery pipe; 9 - Sprinkler head; 10 - Motor; 11 - Threaded column; 12 - U-shaped connecting frame; 13 - Slide column; 14 - Movable cover plate; 15 - Semiconductor refrigeration sheet; 16 - Cooling fan; 17 - Cold conduction square pipe; 18 - Cold conduction fin; 19 - Installation rib; 20 - Connecting bent rod; 21 - Pressure strip; 22 - Rotating shaft; 23 - Worm gear; 24 - Worm; 25 - Disk; 26 - Bottom support bar; 27 - Air guiding hole; 28 - Sealing gasket; 29 - Positioning groove. Detailed implementation manners

[0038] Next, the technical solutions of the present application will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0039] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application 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 to the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0040] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0041] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0042] According to a first aspect of an embodiment of the present application, a battery pack is provided. The following will be combined with Figures 1 to 10 to specifically describe the structure and working principle of the battery pack.

[0043] According to the battery pack provided by the embodiment of the present application, the battery pack includes an outer box body, a battery body, and a spraying assembly. In the embodiment, the outer box body has a cavity, and a cooling medium is accommodated in the cavity. In the embodiment, the battery body is accommodated inside the cavity.

[0044] In the embodiment, the spraying assembly includes a plurality of delivery pipelines, and the spraying assembly further includes a plurality of nozzles provided for each delivery pipeline. The plurality of delivery pipelines are used for circulating the cooling medium, and the plurality of nozzles are used for spraying the cooling medium onto the battery body.

[0045] In the embodiment, the plurality of delivery pipelines can be lifted and lowered to adjust the height where the plurality of nozzles are located.

[0046] Thus, according to the battery pack provided by the embodiment of the present application, the battery pack uses the cooling medium accommodated in the outer box body of the battery pack as a cooling medium, and through the spraying assembly, sprays the cooling medium in a spraying manner into the battery pack onto the battery body accommodated in the cavity of the outer box body, thereby cooling the battery body. The cooling medium sprayed onto the surface of the battery body flows downward from the outside of the battery body to the bottom of the outer box body, and can be transported to the corresponding nozzles via the delivery pipeline again, thereby forming a cycle of the cooling medium.

[0047] According to the battery pack provided by the embodiments of the present application, compared with the air-cooled battery pack in the prior art, the battery pack provided by the embodiments of the present application accommodates a cooling medium inside, and sprays the cooling medium to cool the battery body inside the battery pack, effectively improving the cooling effect on the battery body. At the same time, the multiple delivery pipelines of the spraying assembly can be lifted, so as to provide a more comprehensive spray on the outside of the battery body, increase the spray area on the outside of the battery body, and improve the cooling effect of spray cooling.

[0048] In an embodiment, the cooling medium can be, for example, a cooling oil, such as a mineral oil.

[0049] In an embodiment, the battery body can be, for example, a battery module, that is, a plurality of battery cells are fixedly connected together to form a battery module that can be independently assembled. As an example, the battery pack can include, for example, a battery module.

[0050] In an embodiment, the delivery pipelines can extend along the length direction of the battery pack, and multiple battery modules (such as three battery modules) can be arranged at intervals along the width direction of the battery pack. The delivery pipelines can be arranged between adjacent battery modules and on the outside of the outermost battery pack in the width direction. In other words, the number of delivery pipelines can always be one more than the number of battery modules, and the delivery pipelines are also arranged at intervals along the width direction.

[0051] According to the battery pack provided by the embodiments of the present application, the battery pack can further include a cooling assembly. A part of the cooling assembly can be arranged in the cavity. The cooling assembly can be in contact with the cooling medium to cool the cooling medium. In an embodiment, the cooling medium in the cavity is cooled by the cooling assembly, and cold is provided for the cooling medium that flows back to the bottom of the outer box after absorbing the heat of the battery body, so that these cooling media can better cool the battery body after being cooled.

[0052] According to the battery pack provided by the embodiments of the present application, the cooling assembly can include a heat conduction structure and a heat dissipation structure. The heat conduction structure can be arranged in the cavity and can be in contact with the cooling medium. The heat dissipation structure can be arranged on the outside of the outer box, and the heat dissipation structure can exchange heat with the heat conduction structure to reduce the temperature of the heat conduction structure.

[0053] According to the battery pack provided by the embodiments of the present application, the battery pack can further include a pressing strip. The pressing strip can be movably connected to the outer box. The battery body has a concave part. The pressing strip can move relative to the outer box and be embedded in the concave part. The pressing strip can also move relative to the outer box to disengage from the concave part. Thereby ensuring that the battery body can be effectively positioned with the outer box.

[0054] According to the battery pack provided by the embodiments of the present application, the battery pack further includes a rotating shaft, the rotating shaft is movably connected to the outer box body, the battery pack further includes a worm gear and a worm that mesh with each other, and the worm gear is coaxially connected to the rotating shaft. In the embodiment, the power of the rotating shaft is transmitted by the worm gear and the worm. In addition to being able to transmit power, the worm gear and the worm themselves also have a self-locking ability, thereby preventing the position of the pressing strip from changing.

[0055] According to the battery pack provided by the embodiments of the present application, the battery pack may further include a laminate disposed in the cavity, and the laminate may be detachably connected to the battery body. In the embodiment, the battery pack may further include a sealing ring sleeved outside the battery body, and the sealing ring may be used to seal the gap between the laminate and the battery body. In this way, according to the battery pack provided by the embodiments of the present application, the gap between the laminate and the battery body can be sealed by the sealing ring, thereby preventing the cooling medium from leaking from the gap.

[0056] According to the battery pack provided by the embodiments of the present application, the outer box body may include a plurality of air guide holes, the air guide holes penetrate through the outer box body, and the height of the air guide holes is higher than that of the laminate. According to the battery pack provided by the embodiments of the present application, the air guide holes can facilitate ventilation and heat dissipation at the position above the laminate. Since it is above the laminate, cooling media such as mineral oil below the laminate will not leak through the air guide holes.

[0057] Based on the technical features described above, the specific implementation manners and related beneficial effects of the battery pack will be specifically described below.

[0058] The embodiments of the present application aim to provide a structure for preventing spontaneous combustion of new energy vehicle batteries. Aiming at the defects that the existing air-cooling cooling method is difficult to evenly cool the batteries at all angles, the heat accumulation inside the batteries is difficult to dissipate, the cooling efficiency is low, and it is difficult to effectively suppress the over-high temperature inside the batteries, a structure for preventing spontaneous combustion of new energy vehicle batteries is proposed. Through mineral oil circulating spray cooling, semiconductor refrigeration sheet assisted cooling and corresponding structural design, effective cooling of the new energy vehicle batteries is achieved, the spontaneous combustion of the batteries due to overheating is avoided, and the safety and reliability of the new energy vehicle batteries are improved.

[0059] In the embodiment, the battery pack provided by the embodiments of the present application includes an outer box body 1, and a new energy battery body 2 (such as a lithium battery module, specifically refer to the above description) is placed inside the outer box body 1.

[0060] In an embodiment, a movable cover plate 14 can be detachably fixed to the top surface of the outer box body 1 by bolts. Mineral oil is filled at the inner bottom of the outer box body 1. The spraying assembly further includes a liquid extraction pump 5, a liquid extraction pipe 6, and a connecting hose 7. Among them, the aforementioned liquid extraction pump 5 is fixedly installed inside the outer box body 1. The liquid inlet end of the liquid extraction pump 5 is fixedly connected to the liquid extraction pipe 6, the liquid outlet end of the liquid extraction pump 5 is fixedly connected to the connecting hose 7, the end of the connecting hose 7 is fixedly connected to a delivery pipe 8 (i.e., the above-mentioned delivery pipeline), and a nozzle 9 is fixedly connected to the surface of the delivery pipe 8.

[0061] In an embodiment, the outer box body 1 can be installed on a new energy vehicle. The outer box body 1 is closed by using the movable cover plate 14, so that the new energy battery body 2 can be in a relatively airtight environment to protect the new energy battery body 2. During the operation of the new energy battery body 2, a large amount of heat will be generated. By operating the liquid extraction pump 5, the mineral oil stored at the bottom side inside the outer box body 1 is extracted, and the mineral oil is conveyed through the connecting hose 7. The oil liquid reaches the nozzle 9 through the delivery pipe 8, and the mineral oil is sprayed onto the surface of the new energy battery body 2 through the nozzle 9. The mineral oil can adsorb the heat on the surface of the new energy battery body 2, realizing the cooling of the new energy battery body 2, keeping the temperature of the new energy battery body 2 within a safe range, and avoiding the spontaneous combustion of the new energy battery body 2. Therefore, the safety of battery use is significantly improved.

[0062] In the embodiment of the present application, a layer board 3 is fixedly connected to the inner wall of the outer box body 1, and the new energy battery body 2 is movably clamped with the layer board 3. A supporting bottom frame 4 is also fixedly connected to the inner wall of the outer box body 1. The supporting bottom frame 4 includes a plurality of cross bars and two longitudinal bars arranged left and right. The longitudinal bars are used to limit the left and right ends of the new energy battery body 2. Strengthening bars are fixedly connected to the bottoms of the cross bars and the longitudinal bars, which are used to support the bottom of the new energy battery body 2 and play a main load-bearing role. Among them, the adjacent new energy battery bodies 2 can be separated by the cross bars, avoiding the new energy battery bodies 2 from being in contact with each other, facilitating heat dissipation, and further reducing the risk of battery spontaneous combustion.

[0063] In the embodiment of the present application, a motor 10 is fixedly installed on the top surface of the laminate 3. The output end of the motor 10 is fixedly connected to a threaded column 11. The surface of the threaded column 11 is threadedly connected to a U-shaped connecting frame 12. The end of the U-shaped connecting frame 12 is fixedly connected to the conveying pipe 8. A sliding column 13 is fixedly connected to the bottom surface of the laminate 3, and the U-shaped connecting frame 12 is slidably connected to the sliding column 13. By operating the motor 10, its output shaft is driven to rotate. The output shaft can drive the threaded column 11 to rotate. The thread on the surface of the threaded column 11 will drive the U-shaped connecting frame 12 to move along the surface of the sliding column 13, thereby pulling the conveying pipe 8 and the nozzle 9 to move, so that the position of the nozzle 9 can be adjusted, and thus the surface of the new energy battery body 2 can be comprehensively sprayed and cooled. The motor 10 can also control the threaded column 11 to periodically change the rotation direction, so as to control the periodic lifting and moving of the conveying pipe 8 and the nozzle 9, and achieve comprehensive coverage of the surface of the new energy battery body 2.

[0064] In the embodiment of the present application, a semiconductor refrigeration sheet 15 is fixedly connected to the bottom of the outer box 1. The cold end of the semiconductor refrigeration sheet 15 is fixedly connected to a cold conduction square pipe 17, and the cold conduction square pipe 17 is located inside the outer box 1. A plurality of cold conduction fins 18 are fixedly sleeved on the surface of the cold conduction square pipe 17. A heat dissipation fan 16 is arranged outside the hot end of the semiconductor refrigeration sheet 15.

[0065] In the embodiment, by operating the semiconductor refrigeration sheet 15, its cold end can use the conduction effect of the cold conduction square pipe 17 and the cold conduction fins 18 to cool the mineral oil inside the outer box 1, so that the mineral oil can be kept in a low temperature state, thereby ensuring the heat absorption effect of the mineral oil. The cold conduction square pipe 17 is used to prevent the cold end of the semiconductor refrigeration sheet 15 from directly contacting the mineral oil, and the cold conduction fins 18 can be used to increase the heat exchange area with the mineral oil, thereby improving the cooling effect.

[0066] In addition, by operating the heat dissipation fan 16, the air flow at the hot end of the semiconductor refrigeration sheet 15 can be accelerated, so as to facilitate the heat dissipation of the semiconductor refrigeration sheet 15. Bottom support bars 26 are fixedly connected to both the left and right sides of the bottom surface of the outer box 1. The bottom support bars 26 can be used to separate a distance between the outer box 1 and the placement surface, so as to facilitate the heat dissipation below the semiconductor refrigeration sheet 15.

[0067] In the embodiment of the present application, mounting ridges 19 are fixedly connected to both the left and right sides of the top surface of the outer box 1. A rotating shaft 22 is rotatably inserted into the surface of the mounting ridge 19. A connecting bent rod 20 is fixedly connected to the surface of the rotating shaft 22. A pressing strip 21 is fixedly connected to the end of the connecting bent rod 20. A positioning groove 29 is formed on the top surface of the new energy battery body 2, and the inner wall of the positioning groove 29 is movably clamped with the pressing strip 21.

[0068] In an embodiment, by rotating the rotating shaft 22, the connecting bent rod 20 and the pressing strip 21 are driven to rotate, so that the pressing strip 21 is clamped into the inner wall of the positioning groove 29, thereby pressing the top of the left and right sides of the new energy battery body 2, so that the new energy battery body 2 can be kept stable. In the embodiment, the surface of the mounting rib 19 is rotatably connected with a worm 24, the top end of the worm 24 is fixedly connected with a wheel disc 25, the surface of the rotating shaft 22 is fixedly sleeved with a worm gear 23, and the worm gear 23 meshes with the worm 24.

[0069] In an embodiment, the operator can drive the worm 24 to rotate by rotating the wheel disc 25, the worm 24 can drive the meshing worm gear 23 to rotate, so as to control the rotation of the rotating shaft 22. At the same time, the worm gear 23 and the worm 24 can achieve self-locking, thereby preventing the rotating shaft 22 from loosening, making the limit of the corresponding new energy battery body 2 more stable, preventing the battery from shifting due to vehicle bumps or vibrations, and ensuring the normal operation and safety of the battery.

[0070] In the embodiment of the present application, a sealing gasket 28 is fixedly sleeved on the top edge of the new energy battery body 2, and the sealing gasket 28 is made of silicone rubber. A ventilation hole 27 is formed through the surface of the outer box body 1, and the position of the ventilation hole 27 is higher than that of the layer board 3. The silicone rubber sealing gasket 28 is used to seal the joint position between the new energy battery body 2 and the layer board 3 to avoid leakage of mineral oil from this position. By providing the ventilation hole 27, ventilation and heat dissipation above the layer board 3 can be facilitated, and mineral oil leakage will not occur here.

[0071] According to the technical content described above, the battery pack provided by the embodiment of the present application aims to provide a battery pack with a battery anti-self-ignition structure applied to new energy vehicles. Aiming at the defects that the existing air-cooling cooling method is difficult to uniformly cool the battery at all angles, the heat accumulation inside the battery is difficult to dissipate, the cooling efficiency is low, and it is difficult to effectively suppress the over-high temperature inside the battery, a battery pack is proposed. Through mineral oil circulating spray cooling, semiconductor refrigeration sheet assisted cooling and corresponding structural design, effective cooling of the new energy vehicle battery is realized, the battery is prevented from self-igniting due to overheating, and the safety and reliability of the new energy vehicle battery are improved.

[0072] Specifically, the battery pack provided by the embodiment of the present application cools down by mineral oil circulating spray, that is, mineral oil is filled at the inner bottom of the outer box body 1, the mineral oil is pumped by the liquid pump 5, transported to the delivery pipe 8 through the connecting hose 7, and then sprayed onto the surface of the new energy battery body 2 through the nozzle 9 to achieve cooling.

[0073] For the position of the nozzle, it can be adjusted. That is, the motor 10 is used to drive the threaded column 11 to rotate, driving the U-shaped connecting frame 12 to move along the sliding column 13, thereby pulling the delivery pipe 8 and the nozzle 9 to move, adjusting the position of the nozzle, and performing comprehensive spraying and cooling on the surface of the new energy battery body 2.

[0074] In addition, the battery pack is also equipped with semiconductor refrigeration for auxiliary cooling. That is, a semiconductor refrigeration sheet 15 is fixed at the bottom of the outer box body 1, and its cold end cools the mineral oil inside the outer box body 1 through a cold conduction square pipe 17 and cold conduction fins 18, and a heat dissipation fan 16 is arranged outside the hot end to accelerate air flow and heat dissipation.

[0075] Therefore, the battery pack provided by the embodiment of the present application has the following advantages.

[0076] Multi-directional cooling: By operating the liquid extraction pump 5, the mineral oil stored at the bottom side inside the outer box body 1 is extracted, and the mineral oil is transported through the connecting hose 7. The oil liquid reaches the nozzle 9 through the delivery pipe 8, and the mineral oil is sprayed onto the surface of the new energy battery body 2 through the nozzle 9. The mineral oil can adsorb the heat on the surface of the new energy battery body 2, realizing the cooling of the new energy battery body 2, keeping the temperature of the new energy battery body 2 within a safe range, effectively avoiding the risk of spontaneous combustion caused by overheating of the battery, and significantly improving the safety of battery use.

[0077] Auxiliary refrigeration enhancement: By operating the semiconductor refrigeration sheet 15, its cold end can cool the mineral oil inside the outer box body 1 through the conduction of the cold conduction square pipe 17 and the cold conduction fins 18. The cold conduction square pipe 17 is used to prevent the cold end of the semiconductor refrigeration sheet 15 from directly contacting the mineral oil, and the cold conduction fins 18 can increase the heat exchange area with the mineral oil, thereby improving the cooling effect. In addition, by operating the heat dissipation fan 16, the air flow at the hot end of the semiconductor refrigeration sheet 15 can be accelerated, facilitating the heat dissipation of the semiconductor refrigeration sheet 15, further reducing the temperature of the mineral oil inside the outer box body 1, enhancing the overall cooling effect, enabling the battery to operate in a more suitable temperature environment, and extending the service life of the battery.

[0078] Dynamic spray adjustment: When the motor 10 operates, its output shaft rotates. The output shaft drives the threaded column 11 to rotate. The threads on the surface of the threaded column 11 drive the U-shaped connecting frame 12 to move along the surface of the sliding column 13, thereby pulling the delivery pipe 8 and the nozzle 9 to move, enabling the nozzle 9 to adjust its position, so as to comprehensively spray and cool the surface of the new energy battery body 2. The motor 10 controls the threaded column 11 to periodically change the rotation direction, which can control the periodic lifting and lowering movement of the delivery pipe 8 and the nozzle 9, achieving comprehensive coverage of the surface of the new energy battery body 2, enabling uniform spraying on the surface of the new energy battery body 2, solving the problem that it is difficult to evenly cool the battery at various angles by the traditional air-cooling method, improving the heat dissipation efficiency and uniformity, ensuring the temperature balance of each part of the battery, and reducing the phenomenon of local overheating.

[0079] Structural optimization for heat dissipation: By opening the air guide holes 27, it is convenient to ventilate and dissipate heat above the laminate 3. The design of the grid-shaped supporting chassis 4 not only fixes the position of the battery but also separates adjacent batteries through the cross bars, increasing the heat dissipation space between the batteries and promoting the dissipation of heat, further enhancing the heat dissipation performance.

[0080] Firm limiting: The user can rotate the turntable 25 to drive the worm 24 to rotate. The worm 24 drives the worm gear 23 meshing with it to rotate, thereby controlling the rotation of the rotating shaft 22. Through the rotation of the rotating shaft 22, the connecting bent rod 20 and the pressing strip 21 are driven to rotate, making the pressing strip 21 snap into the inner wall of the positioning groove 29, so as to tightly press the top of the left and right sides of the new energy battery body 2, enabling the new energy battery body 2 to remain stable. At the same time, the worm gear 23 and the worm 24 can achieve self-locking, thus preventing the rotating shaft 22 from loosening and preventing the battery from shifting due to vehicle bumps or vibrations, ensuring the normal operation and safety of the battery.

[0081] The silicone rubber sealing gasket 28 effectively seals the joint between the battery and the laminate 3, preventing the leakage of mineral oil. At the same time, the design of the air guide holes 27 realizes the ventilation and heat dissipation above the laminate 3 without affecting the sealing performance, optimizing the operating environment of the battery.

[0082] Cost controllable: Mineral oil is used as the cooling medium, with relatively low cost, easy to obtain and replace, reducing the overall cost of the system. At the same time, the structural components adopted in this invention are all common mechanical elements, and the manufacturing process is mature, further reducing the production cost.

[0083] Easy to maintain: Each component is reasonably designed, convenient for disassembly and assembly, and the daily maintenance and cleaning work are simple and easy. For example, the replacement and repair of key components such as the liquid extraction pump 5 and the semiconductor refrigeration sheet 15 are convenient and fast, reducing the maintenance time and cost, and improving the reliability and economy of the system.

[0084] According to the second aspect of the embodiments of the present application, a vehicle is further provided. The vehicle includes the battery pack as described above and also includes the beneficial effects as described above, which will not be elaborated here. Here, the vehicle can be, for example, a new energy vehicle, and the driving power is provided by the battery pack.

[0085] The above are only the preferred embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent structural transformation made by using the content of the specification and drawings of the present application under the innovative concept of the present application, or any direct / indirect application in other related technical fields is included in the protection scope of the present application.

Claims

1. A battery pack, characterized in that, The battery pack includes: An outer box body, which has a cavity, and a cooling medium is accommodated in the cavity; A battery body, which is accommodated inside the cavity; A spraying assembly, which includes a plurality of conveying pipelines, and the spraying assembly further includes a plurality of nozzles provided for each conveying pipeline. The plurality of conveying pipelines are used for circulating the cooling medium, and the plurality of nozzles are used for spraying the cooling medium onto the battery body; Wherein, the plurality of conveying pipelines can be lifted and lowered to adjust the height where the plurality of nozzles are located; Wherein, the cooling medium is in a liquid state; The battery pack further includes a cooling assembly, and the cooling assembly includes: A heat conduction structure, which is arranged in the cavity and is in contact with the cooling medium; A heat dissipation structure, which is arranged on the outer side of the outer box body and is connected to the heat conduction structure for heat exchange to reduce the temperature of the heat conduction structure; Wherein, the spraying assembly includes a motor, a threaded column, a U-shaped connecting frame and a sliding column. The output shaft of the motor is fixedly connected to the threaded column, the surface of the threaded column is threadedly connected with the U-shaped connecting frame, the end of the U-shaped connecting frame is fixedly connected to the conveying pipeline, and the U-shaped connecting frame is slidably connected to the sliding column; Wherein, the motor operates to drive the output shaft to rotate, the output shaft drives the threaded column to rotate, and the thread on the surface of the threaded column drives the U-shaped connecting frame to move along the surface of the sliding column, thereby pulling the conveying pipeline and the nozzle to move, so that the nozzle adjusts its position, thereby comprehensively spraying and cooling the surface of the battery body; Wherein, the motor controls the threaded column to periodically change the rotation direction to control the periodic lifting and lowering movement of the conveying pipeline and the nozzle.

2. The battery pack according to claim 1, characterized in that, The battery pack further includes a pressing strip, which is movably connected to the outer box body. The battery body has a concave portion, and the pressing strip can move relative to the outer box body and be embedded in the concave portion. The pressing strip can also move relative to the outer box body to disengage from the concave portion.

3. The battery pack according to claim 2, characterized in that, The battery pack further includes a rotating shaft, which is movably connected to the outer box body. The battery pack further includes a worm gear and a worm that mesh with each other, and the worm gear is coaxially connected to the rotating shaft.

4. The battery pack according to claim 1, wherein The battery pack further includes a layer board arranged in the cavity, and the layer board is detachably connected to the battery body; Wherein, the battery pack further includes a sealing ring sleeved on the outer side of the battery body, and the sealing ring is used for sealing the gap between the layer board and the battery body.

5. The battery pack according to claim 4, characterized in that, The outer box body includes a plurality of air guiding holes, which penetrate through the outer box body, and the height of the air guiding holes is higher than that of the layer board.

6. The battery pack according to claim 1, characterized in that, The battery pack further includes a bottom supporting member, which supports the bottom of the outer box body.

7. The battery pack according to claim 1, characterized in that, The battery pack further includes a supporting bottom frame arranged in the cavity, and the battery body is erected on the supporting bottom frame. The number of the battery bodies is multiple and they are spaced apart by the supporting bottom frame.

8. A vehicle, characterized in that, The vehicle includes the battery pack according to any one of claims 1 to 7.

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