Battery pack and vehicle

Abstract

The invention relates to the technical field of batteries, and provides a battery pack and a vehicle. According to the battery pack provided by the invention, the cooling medium contained in the outer box body of the battery pack is used as the cooling medium, and the cooling medium is sprayed to the battery body in the battery pack and contained in the cavity of the outer box body in a spraying manner through the spraying assembly, so that the battery body is cooled; and the cooling medium sprayed to the surface of the battery body downwards flows back to the bottom of the outer box body from the outer side of the battery body, and can be conveyed to the corresponding spray head through the conveying pipeline again, so that circulation of the cooling medium is formed.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack and a vehicle. Background Art

[0002] In recent years, the new energy vehicle industry has developed rapidly, but battery safety has always been the focus of the industry. Lithium-ion batteries are widely used in new energy vehicles due to their high energy density and environmental friendliness, but they also have the risk of poor heat dissipation and spontaneous combustion. When the battery is overheated or damaged, the internal electrolyte, negative electrode and positive electrode materials will undergo chemical reactions, generating a large amount of heat and gas, which will eventually cause the battery to swell violently, rupture or even spontaneously combust.

[0003] In current technology, air cooling is often used for cooling, but air cooling has the following defects: it is difficult to evenly cool all angles of the battery; the lithium battery packs inside the battery are closely arranged, and heat is easy to accumulate but difficult to dissipate. These defects lead to low efficiency of air cooling 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, the purpose of which is 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, the battery pack comprising: An outer box body, wherein the outer box body has a cavity, and a cooling medium is contained in the cavity; A battery body, the battery body being accommodated inside the cavity; A spray assembly, the spray assembly comprising a plurality of delivery pipelines, the spray assembly further comprising a plurality of spray heads provided for each delivery pipeline, the plurality of delivery pipelines being used to circulate the cooling medium, and the plurality of spray heads being used to spray the cooling medium onto the battery body; Wherein, the plurality of delivery pipelines can be raised and lowered to adjust the heights of the plurality of nozzles.

[0006] On the basis of the above technical solution, optionally, the battery pack further includes a cooling assembly, a portion of which is disposed in the cavity, and the cooling assembly is in contact with a cooling medium for cooling the cooling medium.

[0007] On the basis of any of the above technical solutions, optionally, the battery pack further includes a cooling assembly, and the cooling assembly includes: A cooling structure, wherein the cooling structure is disposed in the cavity and is in contact with the cooling medium; A heat dissipation structure is arranged on the outside of the outer box body, and the heat dissipation structure exchanges heat with the cooling structure to reduce the temperature of the cooling structure.

[0008] Based on any of the above technical solutions, optionally, the battery pack further includes a pressure strip, which is movably connected to the outer box body, the battery body has a recess, the pressure strip can move relative to the outer box body and be embedded in the recess, and the pressure strip can also move relative to the outer box body to disengage from the recess.

[0009] Based on any of the above technical solutions, optionally, the battery pack further includes a rotating shaft, which is movably connected to the outer box body, and 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.

[0010] On the basis of any of the above technical solutions, optionally, the battery pack further comprises a layer plate disposed in the cavity, and the layer plate 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 to seal the gap between the layer plate and the battery body.

[0011] On the basis of any of the above technical solutions, optionally, the outer box body includes a plurality of air guide holes, the air guide holes penetrate the outer box body, and the height of the air guide holes is higher than the layer plate.

[0012] On the basis of any of the above technical solutions, optionally, the battery pack further includes a bottom support member, and the bottom support member is supported on the bottom of the outer box body.

[0013] On the basis of any of the above technical solutions, optionally, the battery pack further comprises a supporting frame arranged in the cavity, the battery body is mounted on the supporting frame, and the number of the battery bodies is plural and they are spaced apart by the supporting frame.

[0014] According to a second aspect of the present application, a vehicle is provided, the vehicle comprising a battery pack as described above.

[0015] According to the battery pack provided in the present application, the battery pack utilizes the cooling medium contained in the outer box of the battery pack as the cooling medium, and sprays the cooling medium to the battery body contained in the cavity of the outer box in the battery pack through the spray assembly in a spraying manner, thereby cooling the battery body. The cooling medium sprayed onto the surface of the battery body flows back downward from the outside of the battery body to the bottom of the outer box, and can be transported to the corresponding nozzle again through the delivery pipeline, thereby forming a circulation of the cooling medium.

[0016] 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 embodiment of the present application contains a cooling medium inside, and the battery body in the battery pack is cooled by spraying, which effectively improves the cooling effect of the battery body. At the same time, the multiple delivery pipelines of the spray assembly can be raised and lowered, so as to provide a more comprehensive spraying of the outside of the battery body, increase the spraying area of ​​the outside of the battery body, and improve the cooling effect of the spray cooling.

[0017] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of a three-dimensional diagram of a battery pack provided according to an embodiment of the present application is shown.

[0020] Figure 2 A schematic diagram of a three-dimensional diagram of a battery pack with part of the structure omitted according to an embodiment of the present application is shown.

[0021] Figure 3 A schematic diagram showing another three-dimensional diagram of a battery pack with part of the structure omitted according to an embodiment of the present application is shown.

[0022] Figure 4 A schematic diagram of another three-dimensional diagram of a battery pack with part of the structure omitted according to an embodiment of the present application is shown.

[0023] Figure 5 A schematic diagram of a three-dimensional diagram of structures such as a thermal conductive structure of a battery pack provided according to an embodiment of the present application is shown.

[0024] Figure 6 A schematic diagram of a three-dimensional image of a spray assembly of a battery pack provided according to an embodiment of the present application is shown.

[0025] Figure 7 A schematic diagram of a three-dimensional diagram of a partial structure of a battery pack provided according to an embodiment of the present application is shown.

[0026] Figure 8 Shows Figure 7 Schematic diagram of the enlarged view at A in the middle.

[0027] Fig. 9 A schematic diagram showing a three-dimensional view of the support chassis is shown.

[0028] Fig.10 A schematic diagram showing a three-dimensional view of a battery body is shown.

[0029] Reference numerals: 1-outer box; 2-new energy battery body; 3-layer plate; 4-supporting bottom frame; 5-liquid pump; 6-liquid pumping pipe; 7-connecting hose; 8-delivery pipe; 9-nozzle; 10-motor; 11-threaded column; 12-U-shaped connecting frame; 13-sliding column; 14-movable cover plate; 15-semiconductor refrigeration plate; 16-cooling fan; 17-cooling square tube; 18-cooling fins; 19-installing convex strip; 20-connecting bent rod; 21-pressure strip; 22-rotating shaft; 23-worm gear; 24-worm; 25-wheel disc; 26-bottom support bar; 27-air guide hole; 28-sealing gasket; 29-positioning groove. DETAILED DESCRIPTION

[0030] The technical solution of the present application will be described clearly and completely below 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. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0031] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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 cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0034] According to a first aspect of an embodiment of the present application, a battery pack is provided. Figures 1 to 10 The structure and working principle of the battery pack are explained in detail.

[0035] According to the battery pack provided in the embodiment of the present application, the battery pack includes an outer box, a battery body and a spray assembly. In the embodiment, the outer box has a cavity, and the cavity contains a cooling medium. In the embodiment, the battery body is contained inside the cavity.

[0036] In an embodiment, the spray assembly includes a plurality of delivery pipelines, and the spray assembly also includes a plurality of nozzles provided for each delivery pipeline, the plurality of delivery pipelines are used to circulate the cooling medium, and the plurality of nozzles are used to spray the cooling medium onto the battery body.

[0037] In an embodiment, the plurality of delivery pipelines can be raised and lowered to adjust the heights of the plurality of nozzles.

[0038] In this way, according to the battery pack provided in the embodiment of the present application, the battery pack uses the cooling medium contained in the outer box of the battery pack as the cooling medium, and sprays the cooling medium to the battery body contained in the cavity of the outer box in the battery pack through the spray assembly in a spraying manner, thereby cooling the battery body. The cooling medium sprayed on the surface of the battery body flows back from the outside of the battery body to the bottom of the outer box, and can be transported to the corresponding nozzle again through the delivery pipeline, thereby forming a circulation of the cooling medium.

[0039] According to the battery pack provided by the embodiment of the present application, compared with the air-cooled battery pack in the prior art, the battery pack provided by the embodiment of the present application contains a cooling medium inside, and uses a spraying method to cool the battery body in the battery pack, which effectively improves the cooling effect on the battery body. At the same time, the multiple delivery pipelines of the spray assembly can be raised and lowered, so as to provide a more comprehensive spraying of the outside of the battery body, increase the spraying area of ​​the outside of the battery body, and improve the cooling effect of the spray cooling.

[0040] In an embodiment, the cooling medium may be, for example, a cooling oil, such as mineral oil.

[0041] In an embodiment, the battery body may 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 used for independent assembly. As an example, a battery pack may include, for example, a battery module.

[0042] In an embodiment, the delivery pipeline may extend, for example, along the length direction of the battery pack, and a plurality of battery modules (such as three battery modules) may be arranged at intervals along the width direction of the battery pack. The delivery pipeline may be arranged between adjacent battery modules and outside the outermost battery pack in the width direction. In other words, the number of delivery pipelines may always be one more than the number of battery modules, and the delivery pipelines are also arranged at intervals along the width direction.

[0043] According to the battery pack provided in the embodiment of the present application, the battery pack may further include a cooling assembly, part of which may be disposed in the cavity, and the cooling assembly may be in contact with the cooling medium for cooling the cooling medium. In the embodiment, the cooling assembly cools the cooling medium in the cavity, and provides coldness for the cooling medium that absorbs the heat of the battery body and flows back to the bottom of the outer box, so that the cooling medium can better cool the battery body after being cooled.

[0044] According to the battery pack provided in the embodiment of the present application, the cooling assembly may include a cooling structure and a heat dissipation structure, the cooling structure may be arranged in the cavity, and the cooling structure may be in contact with the cooling medium. The heat dissipation structure may be arranged outside the outer box, and the heat dissipation structure may exchange heat with the cooling structure to reduce the temperature of the cooling structure.

[0045] According to the battery pack provided in the embodiment of the present application, the battery pack may further include a pressure strip, which may be movably connected to the outer box, and the battery body may have a recess, the pressure strip may be movable relative to the outer box and embedded in the recess, and the pressure strip may also be movable relative to the outer box to be separated from the recess, thereby ensuring that the battery body can be effectively positioned with the outer box.

[0046] According to the battery pack provided in the embodiment of the present application, the battery pack also includes a rotating shaft, which is movably connected to the outer box, and the battery pack also includes a worm wheel and a worm that mesh with each other, and the worm wheel is coaxially connected to the rotating shaft. In the embodiment, the power of the rotating shaft is transmitted by the worm wheel and the worm, and the worm wheel and the worm itself have a self-locking ability in addition to being able to transmit power, thereby preventing the pressure strip from changing its position.

[0047] According to the battery pack provided in the embodiment of the present application, the battery pack may further include a layer plate disposed in the cavity, and the layer plate may be detachably connected to the battery body. In an embodiment, the battery pack may further include a sealing ring sleeved on the outside of the battery body, and the sealing ring may be used to seal the gap between the layer plate and the battery body. In this way, according to the battery pack provided in the embodiment of the present application, the sealing ring can seal the gap between the layer plate and the battery body, thereby preventing the cooling medium from leaking from the gap.

[0048] According to the battery pack provided in the embodiment of the present application, the outer box may include a plurality of air guide holes, the air guide holes penetrate the outer box, and the height of the air guide holes is higher than the layer plate. According to the battery pack provided in the embodiment of the present application, the air guide holes can facilitate ventilation and heat dissipation above the layer plate, because the cooling medium such as mineral oil below the layer plate will not leak through the air guide holes.

[0049] Based on the technical features described above, the specific implementation method of the battery pack and related beneficial effects will be described in detail below.

[0050] The embodiment of the present application aims to provide a new energy vehicle battery anti-spontaneous combustion structure. In view of the defects of the existing air cooling method, such as it is difficult to evenly cool the battery at all angles, the heat accumulated inside the battery is difficult to dissipate, the cooling efficiency is low, and it is difficult to effectively suppress the excessive internal temperature of the battery, a new energy vehicle battery anti-spontaneous combustion structure is proposed. Through mineral oil circulation spray cooling, semiconductor refrigeration plate auxiliary cooling and corresponding structural design, effective cooling of new energy vehicle batteries is achieved, avoiding spontaneous combustion of batteries due to overheating, and improving the safety and reliability of new energy vehicle batteries.

[0051] In an embodiment, the battery pack provided in the embodiment of the present application includes an outer box body 1, and a new energy battery body 2 (for example, a lithium battery module, refer to the above description for details) is placed inside the outer box body 1.

[0052] In the embodiment, the top surface of the outer box 1 can be detachably fixed with a movable cover plate 14 by bolts, the inner bottom of the outer box 1 is filled with mineral oil, and the spray assembly also includes a liquid pump 5, a liquid pipe 6 and a connecting hose 7. Among them, the aforementioned liquid pump 5 is fixedly installed inside the outer box 1, the liquid inlet end of the liquid pump 5 is fixedly connected to the liquid pipe 6, the liquid outlet end of the liquid pump 5 is fixedly connected to the connecting hose 7, the end of the connecting hose 7 is fixedly connected to the delivery pipe 8 (i.e. the above-mentioned delivery pipeline), and the surface of the delivery pipe 8 is fixedly connected to the spray head 9.

[0053] In the embodiment, the outer box 1 can be installed on a new energy vehicle, and the outer box 1 can be closed by a movable cover 14, so that the new energy battery body 2 can be in a relatively closed environment to protect the new energy battery body 2. During the operation of the new energy battery body 2, a lot of heat will be generated. The mineral oil stored on the bottom side of the outer box 1 is extracted by the operation of the liquid pump 5, and the mineral oil is transported through the connecting hose 7. The oil reaches the nozzle 9 through the delivery pipe 8, and the mineral oil is sprayed on the surface of the new energy battery body 2 through the nozzle 9. The mineral oil can absorb the heat on the surface of the new energy battery body 2, and realize the cooling of the new energy battery body 2, so that the temperature of the new energy battery body 2 is kept within the safe range, and the new energy battery body 2 is prevented from spontaneous combustion, thereby significantly improving the safety of battery use.

[0054] In the embodiment of the present application, the inner wall of the outer box body 1 is fixedly connected with a layer plate 3, and the new energy battery body 2 and the layer plate 3 are movably connected, and the inner wall of the outer box body 1 is also fixedly connected with a supporting chassis 4, which includes a plurality of cross bars and two longitudinal bars arranged on the left and right. The longitudinal bars are used to limit the left and right ends of the new energy battery body 2, and the bottom of the cross bars and the longitudinal bars is fixedly connected with a reinforcing rod, which is used to support the bottom of the new energy battery body 2 and plays a major load-bearing role. The cross bars can be used to separate adjacent new energy battery bodies 2, avoid the new energy battery bodies 2 from being attached to each other, facilitate heat dissipation, and further reduce the risk of battery spontaneous combustion.

[0055] In the embodiment of the present application, a motor 10 is fixedly installed on the top surface of the layer plate 3, a threaded column 11 is fixedly connected to the output end of the motor 10, a U-shaped connecting frame 12 is threadedly connected to the surface of the threaded column 11, the end of the U-shaped connecting frame 12 is fixedly connected to the delivery pipe 8, and a sliding column 13 is fixedly connected to the bottom surface of the layer plate 3, and the U-shaped connecting frame 12 is slidably connected to the sliding column 13. The motor 10 is driven to rotate its output shaft, and the output shaft can drive the threaded column 11 to rotate. The threads 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, which can pull the delivery pipe 8 and the nozzle 9 to move, so that the nozzle 9 adjusts its position, thereby spraying and cooling the surface of the new energy battery body 2 in an all-round manner. The motor 10 can also control the threaded column 11 to periodically change the rotation direction, which can control the delivery pipe 8 and the nozzle 9 to periodically rise and fall, so as to achieve full coverage of the surface of the new energy battery body 2.

[0056] In the embodiment of the present application, a semiconductor refrigeration sheet 15 is fixedly connected to the bottom of the outer box body 1, a cooling square tube 17 is fixedly connected to the cold end of the semiconductor refrigeration sheet 15, and the cooling square tube 17 is located inside the outer box body 1, a plurality of cooling fins 18 are fixedly sleeved on the surface of the cooling square tube 17, and a cooling fan 16 is arranged outside the hot end of the semiconductor refrigeration sheet 15.

[0057] In the embodiment, the semiconductor refrigeration plate 15 is operated, and its cold end can utilize the conduction effect of the cooling square tube 17 and the cooling 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 cooling square tube 17 is used to prevent the cold end of the semiconductor refrigeration plate 15 from directly contacting the mineral oil, and the cooling fins 18 can be used to increase the heat exchange area with the mineral oil, thereby improving the cooling effect.

[0058] In addition, the operation of the cooling fan 16 can accelerate the air flow at the hot end of the semiconductor cooling sheet 15, thereby facilitating the heat dissipation of the semiconductor cooling sheet 15. The bottom support bars 26 are fixedly connected to the left and right sides of the bottom surface of the outer box body 1. The bottom support bars 26 can be used to separate the outer box body 1 from the placement surface by a distance, thereby facilitating the heat dissipation under the semiconductor cooling sheet 15.

[0059] In the embodiment of the present application, the left and right sides of the top surface of the outer box body 1 are fixedly connected with mounting ridges 19, the surface of the mounting ridges 19 is rotatably plugged with a rotating shaft 22, the surface of the rotating shaft 22 is fixedly connected with a connecting bent rod 20, the end of the connecting bent rod 20 is fixedly connected with a pressure strip 21, and a positioning groove 29 is opened on the top surface of the new energy battery body 2, and the inner wall of the positioning groove 29 is movably engaged with the pressure strip 21.

[0060] In the embodiment, the rotating shaft 22 rotates to drive the connecting bent rod 20 and the pressure strip 21 to rotate, so that the pressure strip 21 is stuck 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 remain stable. In the embodiment, the surface of the mounting convex strip 19 is rotatably connected to the worm 24, the top of the worm 24 is fixedly connected to the wheel disc 25, and the surface of the rotating shaft 22 is fixedly sleeved with a worm wheel 23, and the worm wheel 23 and the worm 24 are meshed with each other.

[0061] In the embodiment, the operator can rotate the wheel 25 to drive the worm 24 to rotate, and the worm 24 can drive the worm wheel 23 meshing with it to rotate, thereby controlling the rotation of the rotating shaft 22. At the same time, the worm wheel 23 and the worm 24 can achieve self-locking, thereby preventing the rotating shaft 22 from loosening, making the corresponding limit of the 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.

[0062] 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. An air guide hole 27 is opened through the surface of the outer box 1, and the position of the air guide hole 27 is higher than the layer plate 3. The sealing gasket 28 made of silicone rubber is used to seal the joint position of the new energy battery body 2 and the layer plate 3 to prevent mineral oil from leaking from this position. By opening the air guide hole 27, ventilation and heat dissipation can be facilitated above the layer plate 3, and mineral oil leakage will not occur here.

[0063] According to the technical content described above, the battery pack provided in accordance with the embodiment of the present application aims to provide a battery pack with a battery anti-spontaneous combustion structure for use in new energy vehicles. In view of the defects of the existing air cooling method, such as it is difficult to evenly cool the battery at all angles, the heat accumulated inside the battery is difficult to dissipate, the cooling efficiency is low, and it is difficult to effectively suppress the excessive internal temperature of the battery, a battery pack is proposed. Through mineral oil circulation spray cooling, semiconductor refrigeration plate auxiliary cooling and corresponding structural design, effective cooling of new energy vehicle batteries is achieved, thereby avoiding spontaneous combustion of the battery due to overheating and improving the safety and reliability of new energy vehicle batteries.

[0064] Specifically, the battery pack provided according to the embodiment of the present application is cooled by circulating mineral oil and spraying, that is, mineral oil is filled at the bottom inner side of the outer box body 1, the mineral oil is extracted by the liquid pump 5, and transported to the delivery pipe 8 through the connecting hose 7, and then the mineral oil is sprayed onto the surface of the new energy battery body 2 through the nozzle 9 to achieve cooling.

[0065] As for the nozzle position, 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 nozzle position, and comprehensively spraying and cooling the surface of the new energy battery body 2.

[0066] In addition, the battery pack is also equipped with semiconductor refrigeration to assist in cooling, that is, a semiconductor refrigeration plate 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 cooling square tube 17 and a cooling fin 18, and a cooling fan 16 is arranged outside the hot end to accelerate air flow and heat dissipation.

[0067] Therefore, the battery pack provided according to the embodiments of the present application has the following advantages.

[0068] Multi-directional cooling: The mineral oil stored on the bottom side of the outer box 1 is extracted by running the liquid pump 5, and the mineral oil is transported through the connecting hose 7. The oil 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 absorb the heat on the surface of the new energy battery body 2, thereby cooling the new energy battery body 2, so that the temperature of the new energy battery body 2 is maintained within a safe range, effectively avoiding the risk of spontaneous combustion of the battery due to overheating, and significantly improving the safety of battery use.

[0069] Auxiliary refrigeration enhancement: through the operation of the semiconductor refrigeration plate 15, its cold end can utilize the conduction effect of the cooling square tube 17 and the cooling fins 18 to cool down the mineral oil inside the outer box 1. The cooling square tube 17 prevents the cold end of the semiconductor refrigeration plate 15 from directly contacting the mineral oil. The cooling fins 18 can increase the heat exchange area with the mineral oil, thereby improving the cooling effect. In addition, through the operation of the cooling fan 16, the air flow at the hot end of the semiconductor refrigeration plate 15 can be accelerated, thereby facilitating the heat dissipation of the semiconductor refrigeration plate 15, further reducing the temperature of the mineral oil inside the outer box 1, enhancing the overall cooling effect, and enabling the battery to operate in a more suitable temperature environment, thereby extending the battery life.

[0070] Dynamic spray adjustment: The motor 10 is operated to drive its output shaft to rotate, and the output shaft can drive the threaded column 11 to rotate. The threads 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, which can pull the delivery pipe 8 and the nozzle 9 to move, so that the nozzle 9 adjusts its position, thereby comprehensively spraying and cooling the surface of the new energy battery body 2. The motor 10 controls the threaded column 11 to periodically change the rotation direction, and can control the delivery pipe 8 and the nozzle 9 to periodically rise and fall to achieve comprehensive coverage of the surface of the new energy battery body 2. It can evenly spray the surface of the new energy battery body 2, which solves the problem that the traditional air cooling method is difficult to evenly cool the battery at all angles, improves the heat dissipation efficiency and uniformity, ensures that the temperature of each part of the battery is balanced, and reduces local overheating.

[0071] Structural optimization of heat dissipation: By opening the air guide holes 27, ventilation and heat dissipation can be facilitated above the layer plate 3. The design of the grid-shaped supporting frame 4 not only fixes the battery position, but also separates adjacent batteries through cross bars, thereby increasing the heat dissipation space between batteries, promoting heat dissipation, and further improving the heat dissipation performance.

[0072] Firmly limit: the user can rotate the wheel 25 to drive the worm 24 to rotate, and the worm 24 can drive the worm wheel 23 meshing with it to rotate, so as to control the rotation of the shaft 22. The rotation of the shaft 22 drives the connecting bent rod 20 and the pressure strip 21 to rotate, so that the pressure strip 21 is stuck in 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 remain stable. At the same time, the worm wheel 23 and the worm 24 can achieve self-locking, thereby avoiding the loosening of the shaft 22 and preventing the battery from shifting due to vehicle bumps or vibrations, thereby ensuring the normal operation and safety of the battery.

[0073] The sealing gasket 28 made of silicone rubber effectively seals the joint between the battery and the layer plate 3 to prevent leakage of mineral oil. At the same time, the design of the air guide hole 27 achieves ventilation and heat dissipation above the layer plate 3 without affecting the sealing, thereby optimizing the operating environment of the battery.

[0074] Cost controllable: Mineral oil as a cooling medium is relatively low in cost and easy to obtain and replace, which reduces the overall cost of the system. At the same time, the structural components used in the invention are all common mechanical components with mature manufacturing processes, which further reduces production costs.

[0075] Easy maintenance: Each component is reasonably designed, easy to disassemble and assemble, and daily maintenance and cleaning are simple and easy. For example, the replacement and maintenance of key components such as the liquid pump 5 and the semiconductor cooling plate 15 are convenient and quick, which reduces maintenance time and cost and improves the reliability and economy of the system.

[0076] According to the second aspect of the embodiment of the present application, a vehicle is also provided, which includes the battery pack as above and the beneficial effects as above, which will not be repeated here. Here, the vehicle can be, for example, a new energy vehicle, which provides driving power through the battery pack.

[0077] The above are only preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. All equivalent structural changes made by using the contents of the present application specification and drawings under the innovative concept of the present application, or directly / indirectly applied in other related technical fields are included in the protection scope of the present application.

Claims

1. A battery pack, characterized in that: The battery pack comprises: An outer box body, wherein the outer box body has a cavity, and a cooling medium is contained in the cavity; A battery body, the battery body being accommodated inside the cavity; A spray assembly, the spray assembly comprising a plurality of delivery pipelines, the spray assembly further comprising a plurality of spray heads provided for each delivery pipeline, the plurality of delivery pipelines being used to circulate the cooling medium, and the plurality of spray heads being used to spray the cooling medium onto the battery body; Wherein, the plurality of delivery pipelines can be raised and lowered to adjust the heights of the plurality of nozzles.

2. The battery pack according to claim 1, characterized in that: The battery pack further includes a cooling assembly, a portion of which is disposed in the cavity, and the cooling assembly is in contact with a cooling medium for cooling the cooling medium.

3. The battery pack according to claim 1, characterized in that: The battery pack further includes a cooling assembly, which includes: A cooling structure, wherein the cooling structure is disposed in the cavity and is in contact with the cooling medium; A heat dissipation structure is arranged on the outside of the outer box body, and the heat dissipation structure exchanges heat with the cooling structure to reduce the temperature of the cooling structure.

4. The battery pack according to claim 1, characterized in that: The battery pack also includes a pressure strip, which is movably connected to the outer box. The battery body has a recess. The pressure strip can move relative to the outer box and be embedded in the recess. The pressure strip can also move relative to the outer box to detach from the recess.

5. The battery pack according to claim 4, 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 wheel and a worm that mesh with each other, and the worm wheel is coaxially connected to the rotating shaft.

6. The battery pack according to claim 1, characterized in that: The battery pack further comprises a layer plate disposed in the cavity, the layer plate being 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 to seal the gap between the layer plate and the battery body.

7. The battery pack according to claim 6, characterized in that: The outer box body includes a plurality of air guide holes, and the air guide holes penetrate through the outer box body. The height of the air guide holes is higher than the layer plate.

8. The battery pack according to claim 1, characterized in that: The battery pack further comprises a bottom support member, and the bottom support member is supported on the bottom of the outer box.

9. The battery pack according to claim 1, characterized in that: The battery pack further comprises a supporting frame arranged in the cavity, the battery body is mounted on the supporting frame, and the battery body is in a plurality and is spaced apart by the supporting frame.

10. A vehicle, characterized in that: The vehicle comprises the battery pack according to any one of claims 1 to 9.

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