Battery system and electric device

Abstract

The utility model discloses a battery system and an electric device, the battery system comprises a box body and a liquid cooling exhaust plate, the box body comprises a frame, the two ends of the liquid cooling exhaust plate in the length direction are respectively connected with the relatively long frames on the two sides so as to separate a battery cell bin; the liquid cooling exhaust plate is provided with an air inlet, and the air inlet is communicated with the battery cell bin; the liquid cooling exhaust plate and the frame at one end are provided with communicated exhaust channels, and an exhaust valve is arranged on the outer side of the frame. The liquid cooling exhaust plate is arranged in the battery box body and is applied to the battery, when thermal runaway occurs in the battery, generated high-temperature flue gas can enter the liquid cooling exhaust plate through the gas inlet and then is exhausted through the frame, and the generated flue gas in the battery can be directionally and timely exhausted to the outside of the battery, so that the battery is prevented from being damaged. Smoke gathering in the battery is reduced, and the safety performance of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery system and an electrical device. Background Art

[0002] The safety of lithium battery systems in new energy vehicles is receiving increasing attention. GB38031 has clarified the relevant requirements for battery pack thermal events, namely providing a warning signal five minutes before danger occurs in the passenger compartment.

[0003] In the existing technology, the explosion-proof mechanism is usually only installed on the lower box of the battery. When a single battery cell experiences thermal runaway, due to the small internal space of the battery and its interconnectedness, a large amount of high-temperature smoke is concentrated, the diffusion direction is uncertain, and the energy is concentrated. The large amount of smoke and flames ejected often cannot be discharged from the box through the explosion-proof valve in time, thereby triggering thermal runaway of adjacent battery cells. It is difficult to slow down the heat diffusion and provide more sufficient evacuation time for the safety of passengers, resulting in poor safety performance.

[0004] To this end, the present application aims to propose a battery system and an electrical device to solve the above problems. Utility Model Content

[0005] The main purpose of the present utility model is to provide a battery system and an electrical device, aiming to solve the technical problem in the prior art that when thermal runaway occurs inside the battery, the battery has no directional exhaust structure, the high-temperature smoke is concentrated, and the diffusion direction is uncertain, resulting in poor battery safety performance.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model proposes a battery system on the one hand, including a box body and a liquid-cooled exhaust plate, the box body includes a frame, and the two ends of the liquid-cooled exhaust plate in the length direction are respectively connected to the relatively longer frames on both sides to separate the battery cell compartment; the liquid-cooled exhaust plate is provided with an air inlet, and the air inlet is connected to the battery cell compartment; the liquid-cooled exhaust plate and the frame at one end are both provided with an exhaust channel connected to each other, and an exhaust valve is provided on the outside of the frame.

[0007] Furthermore, the frame includes a first side frame with an embedded liquid cooling channel, a second side frame provided with the exhaust channel, a third frame and a fourth frame respectively located at both ends of the first side frame and the second side frame, the third frame and the fourth frame are both connected to the first side frame and the second side frame, and the liquid cooling pipe is connected to the liquid cooling exhaust plate.

[0008] Furthermore, the third frame and / or the fourth frame is provided with an exhaust channel, the exhaust valve is provided on the outside of the third frame and / or the fourth frame, and the exhaust channel inside the third frame and / or the fourth frame is connected to the exhaust channel provided on the second side frame.

[0009] Furthermore, the battery system also includes a box cover, which is provided with convex ribs outwardly, and the liquid cooling exhaust plate is provided with at least one exhaust groove, which is connected to the exhaust channel and is provided corresponding to the convex ribs.

[0010] Furthermore, the battery system also includes a pressure plate and a battery cell stack, and the box body and the box cover are combined to form a cavity for accommodating the battery cell stack; wherein, the battery cell stack is arranged in the battery cell compartment; the pressure plate is arranged above the battery cell stack, and the pressure plate is provided with an exhaust hole adapted to the exhaust groove, and the exhaust hole is connected to the exhaust channel through the exhaust groove, and the pressure plate is fixedly connected to the liquid cooling plate and the liquid cooling exhaust plate.

[0011] Furthermore, the liquid-cooled exhaust plate further comprises a blocking piece, which is arranged at the end of the liquid-cooled exhaust plate and is arranged relative to the first frame, and the liquid-cooling pipe passes through the blocking piece and is connected to the liquid-cooled exhaust plate.

[0012] Furthermore, the battery system further includes a plurality of corner brackets, which are respectively arranged on both sides of the liquid-cooling exhaust plate, and the corner brackets are respectively connected to the liquid-cooling exhaust plate and the first side frame.

[0013] Furthermore, the battery system also includes a liquid cooling plate, both ends of which in the length direction are respectively connected to relatively long frames on both sides, and the liquid cooling plate and the liquid cooling exhaust plate are staggered along the frames to separate the battery cell compartments.

[0014] Furthermore, a plurality of air inlets are provided on the surface of each liquid-cooling exhaust plate in contact with the battery cell compartment.

[0015] In order to achieve the above-mentioned purpose of the utility model, the third aspect of the utility model provides an electrical device, including the battery system as described above.

[0016] Beneficial effects:

[0017] Compared with the prior art, a battery system according to an embodiment of the present application includes a housing and a liquid-cooled exhaust plate. The housing includes a frame. The two ends of the liquid-cooled exhaust plate in the length direction are respectively connected to the relatively long frames on both sides to separate the battery cell compartment. The liquid-cooled exhaust plate is provided with an air inlet, which is connected to the battery cell compartment. The liquid-cooled exhaust plate and the frame at one end are both provided with exhaust channels connected thereto, and an exhaust valve is provided on the outside of the frame. This technical solution is applied to batteries by providing a liquid-cooled exhaust plate in the battery housing. When thermal runaway occurs inside the battery, the high-temperature flue gas generated can enter the liquid-cooled exhaust plate through the air inlet and then be discharged through the frame. The flue gas generated in the battery can be directed and discharged to the outside of the battery in a timely manner, thereby reducing the accumulation of flue gas inside the battery and improving the safety performance of the battery.

[0018] Compared with the prior art, the power utilization device provided by the embodiment of the application comprises the battery system described in any of the above. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is an embodiment of the battery box of the utility model stereogram structure schematic diagram;

[0020] Figure 2 It is an embodiment of the battery box of the utility model top view;

[0021] Figure 3 It is Figure 2 the middle A-A section schematic diagram;

[0022] Figure 4 It is an embodiment of the battery system of the utility model explosion schematic diagram;

[0023] Figure 5 It is an embodiment of the battery system of the utility model top view;

[0024] Figure 6 It is Figure 5 the middle B-B section schematic diagram;

[0025] Figure 7 It is an embodiment of the liquid cooling exhaust plate of the utility model top view;

[0026] Figure 8 It is Figure 7 the middle C-C section schematic diagram.

[0027] Wherein:

[0028] 1, battery system;10, box;100, frame;1000, exhaust valve;101, first side frame;1010, liquid cooling pipe;102, second side frame;103, third frame;104, fourth frame;11, liquid cooling exhaust plate;110, air inlet;111, exhaust groove;112, plugging piece;12, cell warehouse;13, corner support;14, bottom guard plate;15, liquid cooling plate;2, box cover;20, convex rib;3, cell stack;4, pressing plate;40, exhaust hole.

[0029] The realization, functional characteristics and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0030] It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying 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 direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0032] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] A battery system is a complex electrical energy storage and supply system, primarily composed of battery modules, a battery management system, a thermal management system, a safety system, wiring harnesses, connectors, and housing and mechanical components. The thermal management system, also known as the cooling system, controls the temperature of the battery modules. During the battery charging and discharging process, a significant amount of heat is generated. If this heat cannot be dissipated promptly, the battery temperature will overheat, affecting battery performance and safety, and even causing safety accidents.

[0035] When a single cell in a battery system experiences thermal runaway, it typically produces large amounts of smoke and flames. In existing technology, the explosion-proof mechanism is typically located only on the lower battery housing. Due to the confined interior of the battery pack and its interconnected structures, when a single cell experiences thermal runaway, the large amount of smoke and flames ejected often cannot be promptly discharged from the housing through the explosion-proof valve, potentially triggering thermal runaway in adjacent cells. Furthermore, because the high-temperature smoke is concentrated and its diffusion direction is uncertain, the accumulated energy can easily cause short circuits in electrical components, creating a chain reaction and resulting in poor safety performance.

[0036] In order to solve the technical problem of poor battery safety performance caused by the lack of a directional exhaust structure in the battery when thermal runaway occurs, resulting in the concentration of high-temperature flue gas and uncertain diffusion direction, the inventors integrated the exhaust channel into the liquid cooling plate to form a liquid cooling exhaust plate, which is applied to the battery. When thermal runaway occurs inside the battery, the high-temperature flue gas generated can enter the liquid cooling exhaust plate through the air inlet and then be discharged through the frame. The generated flue gas can be directed and discharged to the outside of the battery in a timely manner, reducing the accumulation of flue gas inside the battery and improving the safety performance of the battery. The battery case and battery system in the embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0037] See also Figures 1 to 8 , Figure 1 This is a schematic diagram of the three-dimensional structure of a battery box according to an embodiment of the present invention; Figure 2 This is a top view of a battery box according to an embodiment of the present invention; Figure 3 for Figure 2 Schematic diagram of a middle AA section. In this embodiment, a battery system 1 is provided, comprising a housing 10 and a liquid-cooling exhaust plate 11. The housing 10 includes a frame 100. The liquid-cooling exhaust plate 11 is connected to the relatively long frames 100 at both ends of its length to separate a battery cell compartment 12. The liquid-cooling exhaust plate 11 is provided with an air inlet 110, which is in communication with the battery cell compartment 12. An exhaust passage is provided between the liquid-cooling exhaust plate 11 and the frame 100 at one end, and an exhaust valve 1000 is provided on the outer side of the frame 100.

[0038] In this embodiment, the housing 10 is the outer shell of the battery system and includes a frame 100 and a bottom guard plate 14. The bottom guard plate 14 is used to securely connect the frame 100 to the battery system 1, thereby forming an effective seal and supporting internal battery components, such as the battery cell stack 3, electrical components, and connectors. It is understood that the frame 100 of the battery system 1 is fixedly connected, forming a solid barrier that protects the internal battery components and internal components. This effectively prevents direct impact of hard objects such as stones and debris from the road on the battery module, reducing the risk of battery damage caused by external collisions. The outer shell protects and supports the internal battery cell stack 3, the liquid cooling exhaust plate 11, and key components such as the electrical components from external environmental influences. The liquid cooling exhaust plate 11 refers to the exhaust channel provided on the liquid cooling plate 15. Specifically, by increasing the thickness of the liquid cooling plate 15, the exhaust channel is provided on one or both sides of the liquid cooling plate 15. That is, the liquid cooling exhaust plate 11 is provided with both a liquid cooling channel and an exhaust channel. The exhaust channel is used to exhaust fumes from the battery in the event of thermal runaway, while the liquid cooling channel is used to accommodate the cooling medium. The battery cell compartment 12 is used to install the battery cell stack 3. Since the battery cell compartment 12 is separated by the liquid cooling exhaust plate 11, when the battery cell stack 3 is installed in the battery cell compartment 12, the liquid cooling exhaust plate 11 can also remove some of the heat from the battery cell stack 3 through the cooling medium in the liquid cooling channel to reduce the temperature. The air inlet 110 is connected to the battery cell compartment 12 for the entry of smoke, and the exhaust valve 1000 is set on the outside of the frame 100 for exhausting smoke. When the battery cell stack 3 or a single battery cell in the battery cell compartment 12 experiences thermal runaway, part of the generated smoke can enter the exhaust channel through the air inlet 110. After passing through the exhaust channel connected to the liquid cooling exhaust plate 11 and the frame 100, the smoke is discharged through the exhaust valve 1000.

[0039] In the above embodiment, the technical solution of the present application is applied to the battery by setting a liquid-cooled exhaust plate 11 in the battery system 1. When thermal runaway occurs inside the battery, the high-temperature flue gas generated can enter the liquid-cooled exhaust plate 11 through the exhaust valve 1000 and then be discharged through the frame 100. The flue gas generated in the battery can be directed and discharged to the outside of the battery in a timely manner, reducing the accumulation of flue gas inside the battery and improving the safety performance of the battery. It can effectively solve the technical problem of poor battery safety performance caused by the lack of a directional exhaust structure in the battery and the uncertainty of the diffusion direction when thermal runaway occurs inside the battery.

[0040] It should be noted that when the battery system 1 of the present application is applied to a battery, the frame 100 is used to fix the battery assembly inside the battery system 1, ensuring that the battery assembly is stable and does not shake in the box 10, and preventing the battery assembly from being damaged or falling off due to vibration or impact during the driving of electrical equipment such as a vehicle. At the same time, the frame 100 is also used to assist in thermal management, such as providing a liquid cooling channel or installing a liquid cooling pipe 1010 in the frame 100. The present application does not impose specific restrictions on the specific structure and shape of the frame 100. For example, the frame 100 can be an integrated structure or a multi-module structure, which can meet the actual design requirements. Since the multi-module structure is conducive to the assembly and maintenance of the battery, in the battery system 1 of the present application, the frame 100 preferably adopts a multi-module structure, which will be described in detail below with reference to the accompanying drawings.

[0041] See also Figures 1 to 8 In one embodiment, the frame 100 includes a first side frame 101 with an embedded liquid cooling pipe 1010, a second side frame 102 provided with the exhaust channel, a third frame 103 and a fourth frame 104 located at both ends of the first side frame 101 and the second side frame 102, respectively, the third frame 103 and the fourth frame 104 are both connected to the first side frame 101 and the second side frame 102, and the liquid cooling pipe 1010 is connected to the liquid cooling exhaust plate 11.

[0042] In this embodiment, the liquid cooling pipe 1010 is a component of the thermal management system in the battery system, which is connected to the liquid cooling exhaust plate 11 for the circulation of the cooling medium. At the same time, the liquid cooling pipe 1010 is embedded in the first side frame 101, which not only saves the internal space of the battery, but also makes the entire thermal management system more compact and efficient, thereby improving the energy density of the battery. An exhaust channel is provided in the second side frame 102, which is connected to the exhaust channel in the liquid cooling exhaust plate 11, and is a guarantee of the safety of the entire battery system. For example, when an abnormal situation such as thermal runaway occurs inside the battery, the exhaust channel can quickly discharge the generated harmful gases (such as smoke, toxic gases, etc.) to the outside of the battery system to prevent the accumulation of harmful gases from seriously damaging the battery system. When applied to electrical devices, such as vehicles, it can increase more safe escape time for passengers.

[0043] In the above embodiment, the third frame 103 and the fourth frame 104 are respectively located at the two ends of the first side frame 101 and the second side frame 102, and are both connected to the first side frame 101 and the second side frame 102, together forming a complete frame 100 structure of the battery system 1, which can enhance the overall strength of the frame 100 and enable the various parts of the battery system 1 to be tightly combined to form a stable whole. The present application does not impose any specific restrictions on the structure of the third frame 103 and the fourth frame 104, as long as it meets the actual design requirements. For example, the third frame 103 and the fourth frame 104 of the present application can be a structure that protrudes outward from the middle. When applied to the battery system, the relevant hardware and / or other components of the battery management system can be installed in the protruding space.

[0044] See also Figures 1 to 8 In one embodiment, the third frame 103 and / or the fourth frame 104 is provided with an exhaust channel, the exhaust valve 1000 is provided on the outside of the third frame 103 and / or the fourth frame 104, and the exhaust channel 103 in the third frame 103 and / or the fourth frame 104 is connected to the exhaust channel provided on the second side frame 102.

[0045] In this embodiment, an exhaust valve 1000 is provided on the outside of the third frame 103 and / or the fourth frame 104. When an abnormal condition such as thermal runaway or short circuit occurs inside the battery, the smoke generated inside the battery can be discharged to the outside of the battery system 1. It is understandable that at least one exhaust valve 1000 is provided on the outside of the third frame 103 and / or the fourth frame 104. The present application does not impose a specific limit on the number of exhaust valves 1000. When multiple exhaust valves 1000 are provided on the outside of the third frame 103 and / or the fourth frame 104, the multiple exhaust valves 1000 can effectively disperse the exhaust pressure of the smoke inside the battery, allowing the smoke to be discharged more evenly through each exhaust valve 1000, thereby avoiding the problems of congestion and poor exhaust that may occur with a single exhaust valve 1000. In addition, by increasing the number of exhaust valves 1000 on the third frame 103 and / or the fourth frame 104, the risk of harmful gas accumulation inside the battery can be further reduced. Even if a certain exhaust valve 1000 fails to work properly due to a malfunction or other reasons, the other exhaust valves 1000 can still continue to play a smoke exhaust role, thereby improving the overall safety of the system.

[0046] Exemplarily, the exhaust valve 1000 is used to discharge the gas inside the battery pack to the outside. When the battery generates a large amount of heat or gas, causing the internal pressure to rise sharply, the exhaust valve can automatically start to release the internal pressure in time to prevent the battery from rupturing, exploding, and other dangerous situations due to excessive pressure. The exhaust valve of the present application can also be an explosion-proof notch. When the exhaust channel is set, the third frame 103 can be provided with an exhaust channel that is connected to the second side frame 102, or the fourth frame 104 can be provided with an exhaust channel that is connected to the second side frame 102, or the third frame 103 and the fourth frame 104 can be provided with exhaust channels at the same time, and they are respectively connected to both ends of the second side frame 102 at the same time to improve the exhaust efficiency and further improve safety.

[0047] See also Figures 1 to 8 In one embodiment, the battery system further includes a box cover 2, the box cover 2 is provided with a convex rib 20 outwardly, the liquid cooling exhaust plate 11 is provided with at least one exhaust groove 111, the exhaust groove 111 is connected to the exhaust channel, the exhaust groove 111 is provided corresponding to the convex rib 20, and the exhaust groove is used to discharge part of the smoke in the exhaust channel into the space formed by the convex rib 20.

[0048] It should be noted that in the prior art, in batteries without directional exhaust, when a single cell or a cell stack 3 experiences thermal runaway, the generated smoke cannot be quickly discharged outside the housing 10. As a result, the high-temperature smoke tends to concentrate at the location where the thermal runaway occurs, resulting in energy accumulation. Over time, this can more easily trigger thermal runaway in other single cells or cell stacks 3.

[0049] To address this issue, in this embodiment, exhaust slots 111 are provided on the liquid-cooled exhaust plate 11. These slots 111 are used to disperse the smoke and reduce its accumulation. Specifically, exhaust slots 111 are located above the exhaust duct to disperse the smoke into the upper space within the battery, further mitigating the risk of thermal runaway in other cells or the cell stack 3. When used in electrical devices, such as vehicles, this can provide passengers with more time to safely escape.

[0050] In the above embodiment, the case cover 2 is used to cover the case body 10, forming an internal chamber for accommodating all components within the battery, such as the cell stack 3, connectors, and hardware related to the battery management system. The ribs 20 are used to increase the exhaust space within the battery, thereby achieving more uniform heat distribution throughout the battery system. This further reduces heat accumulation near the cell stack 3 within the battery system, preventing or mitigating thermal runaway in cell stacks 3 that are not experiencing thermal runaway, and improving the overall safety of the battery system.

[0051] Specifically, the ribs 20 are positioned corresponding to the exhaust slots 111 to facilitate the discharge of high-temperature flue gas. It is understood that the top of the liquid-cooled exhaust plate 11 of the present application is provided with multiple exhaust slots 111, which facilitate the dispersion of high-temperature flue gas into the battery system when thermal runaway occurs, thereby reducing the accumulation of high-temperature flue gas in a single location.

[0052] See also Figures 1 to 8 In one embodiment, the battery system further includes a pressure plate and a battery cell stack, and the box body and the box cover are combined to form a cavity for accommodating the battery cell stack; wherein, the battery cell stack is arranged in the battery cell compartment; the pressure plate is arranged above the battery cell stack, and the pressure plate is provided with an exhaust hole adapted to the exhaust groove, and the exhaust hole is connected to the exhaust channel through the exhaust groove, and the pressure plate is fixedly connected to the liquid cooling plate and the liquid cooling exhaust plate.

[0053] It should be noted that the battery system provided in this application also includes necessary structures and systems. For example, the battery management system and the battery compartment also integrate necessary fixing devices and wiring harnesses to form a complete battery and battery system, which will not be repeated here.

[0054] In the above embodiment, the pressure plate 4 is positioned above the battery cell stack 3 and is fixedly connected to the liquid cooling plate 15 and the liquid cooling exhaust plate 11, specifically via bolts and internal threads. The pressure plate 4, through its weight and fixed structure, ensures the stability of the battery cell stack 3 within the battery system 1. When used in an electrical device, such as a vehicle, it helps prevent the battery cell stack 3 from shifting or loosening due to vibration during driving. The pressure plate 4 is also used to arrange and install components such as copper plates and wiring harnesses.

[0055] In the above embodiment, the exhaust holes 40 are adapted to fit within the exhaust grooves 111. It is understood that the exhaust holes 40 communicate with the exhaust grooves 111 above the liquid-cooled exhaust plate 11, and further with the exhaust passages, allowing the pressure plate 4 to participate in the diffusion of high-temperature flue gas. Furthermore, since the pressure plate 4 is fixed above the battery cell stack 3, it serves to separate the ribs 20 from the battery cell stack 3, preventing high-temperature flue gas from accumulating near the battery cell stack 3. This helps mitigate the rate at which battery cell stacks 3 experiencing thermal runaway are affected by those experiencing thermal runaway. Specifically, the flue gas can be partially discharged into the ribs 20 through the exhaust passages, exhaust grooves, and exhaust holes 40, mitigating safety concerns associated with the accumulation of high-temperature flue gas in battery cell stacks 3 not experiencing thermal runaway. When applied to electrical devices, such as vehicles, this can provide passengers with more time to safely escape.

[0056] See also Figures 1 to 8In one embodiment, the liquid-cooled exhaust plate 11 further includes a blocking piece 112, which is disposed at the end of the liquid-cooled exhaust plate 11. The blocking piece 112 is disposed relative to the first frame 100, and the liquid cooling pipe 1010 passes through the blocking piece 112 and is connected to the liquid-cooled exhaust plate 11.

[0057] In this embodiment, the sealing piece 112 is arranged at the end of the liquid-cooled exhaust plate 11 to provide isolation for the flue gas so that the flue gas can only flow to the opposite side of the sealing piece 112, thereby opening the exhaust valve through the exhaust channel to discharge the high-temperature gas outside the battery system 1.

[0058] It is understood that one side of the liquid-cooled exhaust plate 11 of the present application may also be provided with an integrated packaging structure, with mounting holes provided on the packaging structure for circumventing the liquid-cooled pipe 1010. Since the use of the blocking piece 112 facilitates the installation of the liquid-cooled exhaust pipe and the liquid-cooled pipe 1010, the present application preferably uses the blocking piece 112 to block the exhaust channel at one end of the liquid-cooled exhaust plate 11.

[0059] See also Figures 1 to 8 In one embodiment, the battery system further includes a plurality of corner brackets 13, and the plurality of corner brackets 13 are respectively arranged on both sides of the liquid cooling exhaust plate 11, and the corner brackets 13 are respectively connected to the liquid cooling exhaust plate 13 and the first side frame 101.

[0060] In this embodiment, the corner bracket 13 is preferably trapezoidal, so that the top surface of the corner bracket 13 in the middle corresponds to the corner where the liquid-cooled exhaust plate 11 and the first side frame 101 are opposite. In addition, the connecting surfaces on both sides of the corner bracket 13 are fixedly connected to the liquid-cooled exhaust plate and the first side frame 101 respectively, so that when thermal runaway occurs in the battery cell stack 3, the liquid-cooling pipe 1010 in the first side frame 101 will not be affected by the high-temperature shock in the gap, so that the liquid-cooling pipe 1010 is more comprehensively protected, and the liquid-cooled exhaust plate 11 and the liquid-cooling channel are further connected through the corner bracket 13, so that the connection between the liquid-cooled exhaust plate 11 and the liquid-cooling channel is more firm, and the liquid-cooled exhaust plate 11 and the liquid-cooling pipe 1010 can always remain perpendicular to each other, ensuring that the flow rate of the cooling medium is stable when it enters the liquid-cooled exhaust plate 11 from the liquid-cooling pipe 1010.

[0061] See also Figures 1 to 8 In one embodiment, the battery system further includes a liquid cooling plate 15, the two ends of the liquid cooling plate 15 in the length direction are respectively connected to the relatively long frames 100 on both sides, and the liquid cooling plate 15 and the liquid cooling exhaust plate 11 are staggered along the frame to separate the battery cell compartment.

[0062] It should be noted that, in order to solve the problem that there is no directional exhaust structure in the battery, the high-temperature flue gas is concentrated and the diffusion direction is uncertain, the liquid cooling exhaust plate 11 is arranged in the battery system 1. The liquid cooling exhaust plate 11 in the application refers to that the exhaust passage is arranged on the liquid cooling plate 15, the thickness of the liquid cooling plate 15 is increased, that is, the exhaust passage is arranged on one side or both sides of the liquid cooling plate 15, which causes the liquid cooling exhaust plate 11 to occupy more space inside the battery relative to the liquid cooling plate 15, thereby causing the energy density of the battery to decrease, and at the same time, due to the thickness of the liquid cooling exhaust pipe being relatively thicker than the thickness of the liquid cooling plate 15, the cooling effect on the cell stack 3 is reduced to a certain extent.

[0063] In the embodiment, in order to solve the above-mentioned problems and maintain the balance of internal exhaust, cooling and energy density of the battery, the battery system provided by the application simultaneously adopts the liquid cooling exhaust plate 11 and the liquid cooling plate 15 in the battery system 1. The liquid cooling exhaust plate 11 and the liquid cooling plate 15 are arranged in the battery system 1.

[0064] Please refer to Figures 1 to 8 In an embodiment, the surface of each liquid cooling exhaust plate 11 in contact with the cell compartment 12 is provided with a plurality of air inlets 110.

[0065] In the above-mentioned embodiment, the surface of the liquid cooling exhaust plate 11 in contact with the cell compartment 12 is provided with a plurality of air inlets 110, which is beneficial to the flue gas entering the exhaust passage from multiple positions and improving the exhaust efficiency. At the same time, the relatively wide coverage can timely enter the exhaust passage through the air inlet 110 when thermal runaway occurs in any single cell in the cell compartment 12.

[0066] It should be noted that the shape, size and position of the exhaust port 110 are not specifically limited in the application, and it only needs to be arranged on the two side surfaces (the surface in contact with the cell compartment) of the liquid cooling exhaust plate 11. For example, the exhaust port 110 can be circular, oval, square, triangular or any irregular shape.

[0067] In an embodiment, the application also provides a power consumption device comprising the battery system in the above-mentioned embodiments. Therefore, the power consumption device provided by the embodiments of the application has the technical effects of the technical solutions of the battery system in any of the above-mentioned embodiments. The explanations of the structures and terms that are the same as or corresponding to the above-mentioned embodiments will not be repeated here.

[0068] In the above-mentioned embodiments, it can be understood that the power consumption device can be a vehicle, a portable device, a ship, a spacecraft and an electric tool, etc. The technical solutions described in the embodiments of the application are applicable to all power consumption devices including the use of the battery system.

[0069] The battery system and the power utilization device of the present application can disperse smoke in the following process when thermal runaway occurs inside the battery:

[0070] When thermal runaway occurs in a single battery cell or a single battery cell stack 3 inside the battery system, a large amount of smoke will be generated, and the pressure inside the battery will increase. Under the action of the pressure difference between the inside and outside of the battery, the smoke enters the exhaust channel through the gas inlet 110 of the liquid cooling exhaust plate 11, and a part of the smoke sequentially passes through the liquid cooling exhaust plate 11, the second side frame 102, and the fourth side frame 104 to trigger the multiple exhaust valves on the fourth side frame 104, respectively. After the exhaust valves are opened, the part of the smoke is discharged from the inside of the battery. A part of the smoke sequentially passes through the exhaust groove 111 above the liquid cooling exhaust plate 11 and the exhaust hole 40 on the pressing plate 4 to discharge the smoke into the multiple ribs 20, so as to achieve the purpose of discharging the high-temperature smoke from the box body 10 outside as much as possible and dispersing the high-temperature smoke to more space, reducing the accumulation of high-temperature smoke in the battery system, and improving the safety performance of the battery system.

[0071] In summary, the battery system 1 of the present application includes a box body 10 and a liquid cooling exhaust plate 11. The box body 10 includes a frame 100, and the liquid cooling exhaust plate 11 separates the battery cell compartment 12 across the frame 100. The frame 100 on one side is embedded with a liquid cooling pipe 1010 that is in communication with the liquid cooling exhaust plate 11. The frame 100 on the opposite side and the liquid cooling exhaust plate 11 are both provided with an exhaust channel that is in communication. The gas inlet 110 is provided on the frame 100 on one side of the liquid cooling pipe 1010 and is in communication with the battery cell compartment 12. The exhaust valve 1000 is provided on the opposite frame 100 or the frame 100 in communication therewith. The technical solution sets the liquid cooling exhaust plate 11 in the battery system 1 and applies it to the battery. When thermal runaway occurs inside the battery, the high-temperature smoke generated can enter the liquid cooling exhaust plate 11 through the exhaust valve 1000, and then be discharged through the frame 100. In the battery, the generated smoke can be directed and discharged to the outside of the battery in a timely manner, reducing the accumulation of smoke inside the battery and improving the safety performance of the battery.

[0072] Compared with the prior art, the battery system of the present application includes the battery system 1 of any one of the above. It can be understood that the battery system of the present application can include all the technical features and technical effects of the battery system 1 described above, which will not be repeated here.

[0073] Compared with the prior art, the power utilization device of the present application includes the battery system of any one of the above. It can be understood that the battery system of the present application can include all the technical features and technical effects of the battery system 1 described above, which will not be repeated here.

[0074] The above merely describes preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which are made by using the content of the present application specification and drawings, are also included in the patent protection scope of the present application.

Claims

1. A battery system, characterized in that: include: The box body and the liquid-cooled exhaust plate, the box body includes a frame, the two ends of the liquid-cooled exhaust plate in the length direction are respectively connected to the relatively longer frames on both sides to separate the battery cell compartment; the liquid-cooled exhaust plate is provided with an air inlet, and the air inlet is connected to the battery cell compartment; the liquid-cooled exhaust plate and the frame at one end are both provided with an exhaust channel connected to each other, and an exhaust valve is provided on the outside of the frame.

2. The battery system according to claim 1, wherein: The frame includes a first side frame with an embedded liquid cooling pipe, a second side frame provided with the exhaust channel, a third frame and a fourth frame respectively located at both ends of the first side frame and the second side frame, the third frame and the fourth frame are both connected to the first side frame and the second side frame, and the liquid cooling pipe is connected to the liquid cooling exhaust plate.

3. The battery system according to claim 2, characterized in that The third frame and / or the fourth frame is provided with an exhaust channel, the exhaust valve is provided on the outside of the third frame and / or the fourth frame, and the exhaust channel in the third frame and / or the fourth frame is connected to the exhaust channel provided on the second side frame.

4. The battery system according to claim 1, wherein: It also includes a box cover, which is provided with convex ribs outwardly. The liquid cooling exhaust plate is provided with at least one exhaust groove, which is connected to the exhaust channel and is provided corresponding to the convex ribs.

5. The battery system according to claim 4, characterized in that It also includes a pressure plate and a battery cell stack, and the box body and the box cover are combined to form a cavity for accommodating the battery cell stack; wherein, the battery cell stack is arranged in the battery cell compartment; the pressure plate is arranged above the battery cell stack, and the pressure plate is provided with exhaust holes adapted to the exhaust grooves, and the exhaust holes are connected to the exhaust channels through the exhaust grooves, and the pressure plate is fixedly connected to the liquid cooling plate and the liquid cooling exhaust plate.

6. The battery system according to claim 2, characterized in that The liquid cooling exhaust plate further comprises a blocking piece, which is arranged at the end of the liquid cooling exhaust plate and is arranged relative to the first frame. The liquid cooling pipe passes through the blocking piece and is connected to the liquid cooling exhaust plate.

7. The battery system according to claim 2, characterized in that It also includes a plurality of corner brackets, which are respectively arranged on both sides of the liquid-cooled exhaust plate, and the corner brackets are respectively connected to the liquid-cooled exhaust plate and the first side frame.

8. The battery system according to claim 1, wherein: It also includes a liquid cooling plate, the two ends of which in the length direction are respectively connected to relatively long frames on both sides, and the liquid cooling plate and the liquid cooling exhaust plate are staggered along the frames to separate the battery cell compartment.

9. The battery system according to claim 1, wherein: A plurality of air inlets are provided on the surface of each liquid cooling exhaust plate that contacts the battery cell compartment.

10. An electrical device, characterized in that: Comprising the battery system according to any one of claims 1 to 9.

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