Battery device and electric device

Abstract

The application discloses a battery device and a power utilization device. The battery device comprises a box body, a first heat exchange plate, a heat exchange pipe and a wall. The box body comprises a side beam, a bottom plate and an expansion beam. The side beam and the bottom plate jointly enclose a containing space. The expansion beam divides the containing space into a first containing space containing electrical components and a second containing space containing battery monomers. The first heat exchange plate is located at the bottom of the first containing space, and the electrical components are located on the first heat exchange plate. The heat exchange pipe is in communication with the flow channel of the first heat exchange plate and is used for conveying heat exchange liquid to the first heat exchange plate. The wall enclosing the first containing space is provided with at least one through hole. The at least one through hole is used for communicating the first containing space with the space on the side of the bottom plate away from the first containing space, so as to discharge the leaked liquid in the case that there is leaked liquid in the first containing space. The battery device and the power utilization device provided by the application can improve the reliability of the battery device.

Description

Technical Field

[0001] This application relates to the field of batteries, and more specifically, to a battery device and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development. Internally, liquid leaks in the battery pack can easily lead to short circuits, thermal runaway, and other risks, severely impacting the reliability of the battery system. Utility Model Content

[0003] This application provides a battery device and an electrical device that can improve the reliability of the battery device.

[0004] In a first aspect, this application provides a battery device, comprising: a housing including side beams, a bottom plate, and an expansion beam, the side beams and the bottom plate together forming a receiving space, the expansion beams being disposed between the side beams and dividing the receiving space into a first receiving space and a second receiving space, the first receiving space for accommodating electrical components, and the second receiving space for accommodating battery cells; a first heat exchange plate located at the bottom of the first receiving space, the electrical components being located on the first heat exchange plate, the first heat exchange plate having a flow channel for passing heat exchange fluid, the heat exchange fluid being used to regulate the temperature of the electrical components; a heat exchange tube communicating with the flow channel of the first heat exchange plate for supplying the heat exchange fluid to the first heat exchange plate; and at least one through hole provided in the wall enclosing the first receiving space, the at least one through hole being used to connect the first receiving space with the space on the side of the bottom plate away from the first receiving space, so as to drain the leakage in the event of leakage within the first receiving space.

[0005] In the technical solution of this application embodiment, on the one hand, placing the battery cell and electrical components in two mutually isolated spaces can reduce their mutual influence. Especially when the battery cell experiences thermal runaway, the physical isolation can prevent high temperature and conductive substances from spreading to the electrical components, thereby avoiding cascading thermal runaway effects and reducing the risk of high-voltage short circuits. Furthermore, this allows for separate thermal management of the battery cell and electrical components, reducing the mutual heat transfer influence and facilitating individual disassembly and maintenance. On the other hand, by providing through holes in the cavity wall of the first accommodating space where the electrical components are placed, in the event of leakage in this space, the leaked liquid can be discharged through the through holes, thereby reducing the risk of short circuits and thermal runaways in the electrical components due to leakage accumulation and improving the overall reliability of the battery device.

[0006] In some embodiments of the first aspect, the at least one through hole includes a first through hole, the interior of the expansion beam is a cavity, the expansion beam has a first sidewall perpendicular to the thickness direction of the expansion beam, the first sidewall is close to the first receiving space, the first through hole is disposed on the first sidewall; the first through hole communicates with the first receiving space, the bottom of the expansion beam has a second through hole, the second through hole communicates with the space on the side of the bottom plate away from the first receiving space, and both the first through hole and the second through hole communicate with the cavity.

[0007] In the technical solution of this application embodiment, on the one hand, the expansion beam is set as a cavity, which can provide a buffer space to resist the expansion force of the battery cell and reduce the overall weight of the battery device; on the other hand, by utilizing the cavity of the expansion beam, a through hole is set in the expansion beam, so that the expansion beam can serve as a drainage channel for leakage, allowing the leakage to flow out from the first receiving space. This can reduce the setting of additional drainage pipes, reduce the space occupation of the battery device, and only the through hole needs to be opened to achieve the discharge of leakage. Its structure is simple and helps to reduce processing costs.

[0008] In some embodiments of the first aspect, the distance between the first through hole and the second through hole along the length direction of the expansion beam is greater than or equal to one-third of the length of the expansion beam.

[0009] In the technical solution of this application embodiment, the following configuration can reduce the entry of debris such as dust, water vapor, and high-temperature substances ejected by thermal runaway of battery cells into the first accommodating space through the second through hole and the first through hole when there are other debris in the space on the side of the base plate away from the first accommodating space. This reduces the impact on electrical components and improves the service life of electrical components.

[0010] In some embodiments of the first aspect, the first through hole is disposed on the first sidewall at a position close to the base plate along the thickness direction of the first heat exchange plate.

[0011] In the technical solution of this application embodiment, when there is leakage in the first accommodating space, the leakage will flow towards the bottom plate due to gravity. Therefore, by setting the first through hole near the bottom plate, the leakage can be quickly discharged from the first accommodating space through the first through hole.

[0012] In some embodiments of the first aspect, the at least one through hole further includes a third through hole, which is provided on the base plate.

[0013] In the technical solution of this application embodiment, when there is leakage in the first accommodating space, the leakage will flow towards the bottom plate due to gravity. Thus, by setting the third through hole on the bottom plate, the leakage can be quickly discharged from the first accommodating space through the third through hole.

[0014] In some embodiments of the first aspect, the size L1 of the third through hole satisfies: 0mm < L1 ≤ 5mm.

[0015] In the technical solution of this application embodiment, by setting the size L1 of the third through hole within this range, it is possible to ensure that the third through hole has a certain size so that the leakage liquid can flow out of the first receiving space. At the same time, the size of the third through hole is avoided to be too large, thereby preventing debris such as dust, water vapor, and high-temperature substances ejected by thermal runaway of battery cells from the side of the base plate away from the first receiving space from entering the first receiving space through the third through hole, thereby reducing the impact on electrical components and improving the service life of electrical components.

[0016] In some embodiments of the first aspect, the at least one through hole further includes a fourth through hole, which is provided on the first heat exchange plate, and the projection of the fourth through hole is offset from the projection of the flow channel on a plane perpendicular to the thickness direction of the first heat exchange plate.

[0017] In the technical solution of this application embodiment, by providing a fourth through hole on the first heat exchange plate, the speed at which the leakage liquid flows out of the first accommodating space can be further increased, thereby reducing the risk of short circuits in electrical components caused by the accumulation of leakage liquid inside the first accommodating space.

[0018] In some embodiments of the first aspect, the housing further includes a reinforcing beam located in the first receiving space, the reinforcing beam extending along the thickness direction of the expansion beam, and the two ends of the reinforcing beam along the thickness direction of the expansion beam being connected to the expansion beam and the side beam, respectively.

[0019] In the technical solution of this application embodiment, the reinforcing beam can provide support for the expansion beam, thereby strengthening the structural strength of the expansion beam and further improving its ability to resist the expansion force of the battery cell.

[0020] In some embodiments of the first aspect, in the thickness direction of the reinforcing beam, the location where the heat exchange tube is connected to the first heat exchange plate and the location of the electrical component are located on opposite sides of the reinforcing beam, and the location where the heat exchange tube is connected to the first heat exchange plate and the location of the at least one through hole are located on the same side of the reinforcing beam.

[0021] In the technical solution of this application embodiment, a reinforcing beam is placed between the location and the electrical component, thereby isolating the leakage location from the electrical component and further reducing the risk of short circuits caused by contact with the leakage. Additionally, since leakage is prone to occur at the connection point between the heat exchange tube and the first heat exchange plate, a through hole is placed at this leakage-prone location to allow for timely drainage in case of leakage, thereby reducing the risk of short circuits caused by leakage accumulating in the electrical component and improving the reliability of the battery device.

[0022] In some embodiments of the first aspect, the reinforcing beam is sealed to the expansion beam, the side beam, and the base plate, respectively, and the expansion beam is sealed to the base plate.

[0023] In the technical solution of this application embodiment, leakage can be prevented from passing through the gap of the connection and contacting electrical components or battery cells, while the leakage can be accelerated to flow out of the first receiving space from the through hole, thereby reducing the overall short circuit risk of the battery device.

[0024] In some embodiments of the first aspect, the housing further includes a bottom guard plate disposed on the side of the bottom plate away from the first accommodating space, the bottom guard plate being connected to the side beam to form a third accommodating space, and the at least one through hole being used to connect the first accommodating space and the third accommodating space.

[0025] In the technical solution of this application embodiment, by setting a bottom protective plate, the overall rigidity of the battery device can be improved, and it can block external impacts, thereby improving the reliability of the battery device. It can also isolate the intrusion of external dust, mud, water, etc., reducing the risk of short circuit in the battery device. In addition, the through hole directs the leakage liquid into the third receiving space, thereby collecting the leakage liquid and facilitating centralized treatment of the leakage liquid, which in turn facilitates drainage and cleaning.

[0026] In some embodiments of the first aspect, the battery device further includes a leakage detector for detecting whether leakage exists, the leakage detector being disposed on the bottom cover plate near the at least one through hole; the bottom cover plate is recessed in the thickness direction of the bottom cover plate away from the bottom cover plate, and the minimum distance between the location of the leakage detector and the bottom cover plate is greater than the maximum distance between other locations of the bottom cover plate and the bottom cover plate.

[0027] In the technical solution of this application embodiment, the presence of a leak detector enables timely detection of liquid leaks, allowing for rapid implementation of measures such as power outages to allow complete drainage and inspection of the leak's location. Furthermore, the recessed area of ​​the leak detector within the bottom cover plate can be greater than other areas. Consequently, after the leak channel is placed on the bottom cover plate, gravity causes the leaked liquid to concentrate and flow towards the leak detector, allowing for rapid detection even when the leak is small, thus improving detection efficiency.

[0028] In some embodiments of the first aspect, the second accommodating space is provided with a current collector that extends along the thickness direction of the expansion beam such that at least a portion of the current collector is located in the first accommodating space and communicates with the heat exchange tube in the first accommodating space; the battery device further includes a second heat exchange plate having a flow channel for heat exchange fluid to pass through, the second heat exchange plate communicating with the current collector, and the second heat exchange plate being in contact with at least one side of the battery cell.

[0029] In the technical solution of this application embodiment, by setting the connection point between the current collector and the heat exchange tube within the first accommodating space, the risk of short circuit in the battery cell due to leakage at the connection point can be reduced. Furthermore, by providing the current collector, a unified heat exchange fluid can be provided to the first and second heat exchange plates, thereby reducing the amount of space occupied by the thermal management components inside the battery device.

[0030] In some embodiments of the first aspect, the battery device includes a plurality of battery cells arranged along the thickness direction of the expansion beam, and the battery device also includes a plurality of second heat exchange plates, wherein at least one set of two adjacent battery cells are provided with the second heat exchange plates in the thickness direction of the expansion beam.

[0031] In the technical solution of this application embodiment, by setting multiple second heat exchange plates, the temperature of multiple battery cells can be adjusted so that multiple battery cells have a suitable operating temperature, thereby improving the overall performance of the battery device.

[0032] In some embodiments of the first aspect, the thickness direction of the expansion beam is perpendicular to the plane containing the wall with the largest area in the battery cell.

[0033] In the technical solution of this application embodiment, since the wall with the largest area in the battery cell is most prone to expansion and has the highest degree of expansion deformation, by making the thickness direction of the expansion beam perpendicular to the plane where the wall with the largest area in the battery cell is located, that is, by making the expansion beam abut against the wall with the largest area in the battery cell, the expansion force generated by the battery cell can be effectively resisted, the deformation of the battery cell can be reduced, and the expansion beam's anti-expansion performance can be improved.

[0034] In some embodiments of the first aspect, the battery device further includes a plurality of battery cell assemblies arranged along the length direction of the expansion beam, the battery cell assembly including a plurality of battery cells arranged along the thickness direction of the expansion beam; the current collector is disposed on at least one side of the plurality of battery cell assemblies along the length direction of the expansion beam, and the second heat exchange plate extends along the length direction of the expansion beam and communicates with the current collector at an end near the current collector.

[0035] In the technical solution of this application embodiment, the relative positions between the second heat exchange plate and the current collector enable the current collector to communicate with the end of the second heat exchange plate, thereby uniformly supplying heat exchange fluid to multiple second heat exchange plates, thereby improving the compactness of the overall structural layout of the battery device and reducing space waste.

[0036] In a second aspect, an electrical device is provided, including a battery device as described in the first aspect or any embodiment thereof, the battery device being used to provide electrical energy. Attached Figure Description

[0037] Figure 1 A schematic diagram of the structure of a vehicle according to an embodiment of this application is shown;

[0038] Figure 2 A schematic diagram of the structure of a battery device according to an embodiment of this application is shown;

[0039] Figure 3 A top view of a battery device according to an embodiment of this application is shown;

[0040] Figure 4 A cross-sectional view of a battery device according to an embodiment of this application is shown;

[0041] Figure 5 A schematic diagram of the structure of an expansion beam according to an embodiment of this application is shown;

[0042] Figure 6 A partial enlarged view of a battery device according to an embodiment of this application is shown;

[0043] Figure 7 A partial enlarged view of a battery device according to another embodiment of this application is shown.

[0044] The accompanying drawings are not drawn to scale.

[0045] The labels for each figure are as follows:

[0046] Vehicle, 1; Battery unit, 10; Through hole, 101; First through hole, 101a; Third through hole, 101b; Fourth through hole, 101c; Second through hole, 102; Housing, 11; Side beam, 111; Base plate, 112; Expansion beam, 113; First side wall, 1131; Reinforcing beam, 114; Bottom guard plate, 115; Accommodation space, 110; First accommodation space, 1101; Second accommodation space, 1102; Third accommodation space, 1103; Electrical components, 12; First heat exchange plate, 131; Heat exchange tube, 132; Second heat exchange plate, 133; Current collector, 130; Leakage detector, 14; Battery cell assembly, 15; Battery cell, 20; Controller, 30; Motor, 40. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0049] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0052] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0053] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0054] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0055] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0056] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0057] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0058] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0059] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0060] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0061] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also be provided one or more.

[0062] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0063] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0064] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0065] In some embodiments, the battery device may be a battery pack, which includes a housing and individual battery cells, with the individual battery cells or battery modules housed within a cover.

[0066] In some embodiments, the housing in this application can be part of the vehicle's chassis structure. For example, a portion of the housing can be at least a part of the vehicle's floor, or a portion of the housing can be at least a part of the vehicle's crossbeams and longitudinal beams.

[0067] In the new energy industry, battery technology is a crucial factor in its development, especially the reliability of power batteries, which directly impacts the widespread adoption of key applications such as electric vehicles and energy storage systems. To meet the temperature control requirements of power batteries under high load, fast charging, and extreme environmental conditions, water-cooling systems have become a commonly used thermal management solution due to their high heat exchange efficiency and precise temperature control. However, if a water-cooling system experiences liquid leakage, it can easily lead to risks such as short circuits and thermal runaway, severely impacting the operational reliability of the battery device.

[0068] This application provides a battery device, an electrical device, and a charging device that can solve the above-mentioned problems. The battery device of this application includes a housing, battery cells, electrical components, a first heat exchange plate, and heat exchange tubes. The housing includes side beams, a bottom plate, and an expansion beam. The side beams and bottom plate together enclose a receiving space. The expansion beams are disposed between the side beams and divide the receiving space into a first receiving space and a second receiving space. The first receiving space is used to receive the electrical components, and the second receiving space is used to receive the battery cells. The first heat exchange plate is located at the bottom of the first receiving space, and the electrical components are located on the first heat exchange plate. The first heat exchange plate has a flow channel for heat exchange fluid to pass through, and the heat exchange fluid is used to regulate the temperature of the electrical components. The heat exchange tubes communicate with the flow channel of the first heat exchange plate and are used to deliver heat exchange fluid to the first heat exchange plate. The wall enclosing the first receiving space is provided with at least one through hole, which connects the first receiving space to the space on the side of the bottom plate away from the first receiving space, so as to drain leakage in the event of leakage within the first receiving space.

[0069] In this embodiment, on the one hand, placing the battery cell and electrical components in two isolated spaces reduces their mutual influence. Especially in the event of thermal runaway in the battery cell, the physical isolation prevents high temperature and conductive substances from spreading to the electrical components, thereby avoiding cascading thermal runaway effects and reducing the risk of high-voltage short circuits. Furthermore, this allows for separate thermal management of the battery cell and electrical components, reducing the mutual heat transfer effects and facilitating individual disassembly and maintenance. On the other hand, by providing through holes in the cavity wall of the first accommodating space for the electrical components, in the event of leakage in this space, the leaked liquid can be discharged through the through holes, thereby reducing the risk of short circuits and thermal runaways in the electrical components due to leakage accumulation and improving the overall reliability of the battery device.

[0070] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices.

[0071] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0072] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device.

[0073] For example, such as Figure 1The diagram shown is a structural schematic of a vehicle 1 according to one embodiment of this application. Vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A motor 40, a controller 30, and a battery device 10 can be installed inside vehicle 1. The controller 30 controls the battery device 10 to supply power to the motor 40. For example, the battery device 10 can be installed at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1. For example, the battery device 10 can serve as the operating power source for vehicle 1, for example, to meet the electrical system requirements of vehicle 1, such as for starting, navigation, and operation. In another embodiment of this application, the battery device 10 can not only serve as the operating power source for vehicle 1, but also as the driving power source for vehicle 1, replacing or partially replacing gasoline or natural gas to provide driving power for vehicle 1.

[0074] Figure 2 A schematic diagram of the structure of the battery device 10 according to an embodiment of this application is shown; Figure 3 A top view schematic diagram of the battery device 10 according to an embodiment of this application is shown, for example, Figure 3 As shown Figure 2 A schematic diagram of the battery device 10 after assembly along the Z direction; Figure 4 A cross-sectional view of the battery device 10 according to an embodiment of this application is shown, for example, Figure 4 As shown Figure 3 A schematic cross-sectional view of the battery device 10 shown along section line A-A'.

[0075] like Figures 2 to 4 As shown, the battery device 10 of this application embodiment may include: a housing 11, the housing 11 including side beams 111, a bottom plate 112 and an expansion beam 113, the side beams 111 and the bottom plate 112 together enclosing a receiving space 110, the expansion beam 113 being disposed between the side beams 111 and dividing the receiving space into a first receiving space 1101 and a second receiving space 1102, the first receiving space 1101 being used to receive electrical components 12, and the second receiving space 1102 being used to receive battery cells 20; a first heat exchange plate 131, the first heat exchange plate 131 being located at the bottom of the first receiving space 1101, the electric... The gas component 12 is located on the first heat exchange plate 131, which has a flow channel for heat exchange fluid to pass through. The heat exchange fluid is used to regulate the temperature of the electrical component 12. The heat exchange tube 132 is connected to the flow channel of the first heat exchange plate 131 and is used to deliver heat exchange fluid to the first heat exchange plate 131. The wall surrounding the first receiving space 1101 is provided with at least one through hole 101. The at least one through hole 101 is used to connect the first receiving space 1101 with the space on the side of the bottom plate 112 away from the first receiving space 1101, so as to drain the leakage in the event of leakage in the first receiving space 1101.

[0076] For ease of description, this application primarily uses a near-rectangular-pitch battery device 10 as an example. Furthermore, based on this rectangular-pitch battery device 10, this application defines three reference directions. The length direction of the battery device 10 is the first direction X, the width direction is the second direction Y, and the height direction is the third direction Z. The width, length, and height directions of the battery device 10 are perpendicular to each other, and the width dimension of the battery device 10 is smaller than its length dimension.

[0077] The battery device 10 of this application embodiment may include a housing 11. The housing 11 can be any structure with a accommodating space, so that the battery cells 20 can be accommodated inside the housing 11. For example, the interior of the housing 11 can be a hollow structure, and multiple battery cells 20 can be accommodated inside the housing 11. The housing 11 can be a single integral piece, or it can be composed of multiple separate structures assembled together.

[0078] For example, in some embodiments, the housing 11 may include two parts, namely a first housing part and a second housing part, which are fastened together. The shapes of the first housing part and the second housing part may be determined according to the shape of the components housed inside, for example, according to the shape of a combination of multiple battery cells 20 housed inside. At least one of the first housing part and the second housing part has an opening.

[0079] For example, in some embodiments, the housing 11 may include three or more parts. For instance, the housing 11 includes a cover, a frame, and a bottom. The frame has two openings that are disposed opposite each other. The cover and the bottom cover the two openings respectively, and a plurality of battery cells 20 are accommodated in the housing space formed by the cover, the frame, and the bottom.

[0080] In some embodiments, the housing 11 may include side beams 111 and a bottom plate 112, which together enclose a receiving space 110.

[0081] It should be understood that the side beam 111 can enclose a space with an opening, and the bottom plate 112 can cover the opening, so that the side beam 111 and the bottom plate 112 together enclose a receiving space 110.

[0082] It should also be understood that the housing 11 may include multiple side beams 111. For example, the housing 11 may include four side beams 111, which are respectively arranged around the perimeter of the housing 11 to enclose a space with an opening along a third direction.

[0083] The space enclosed by the side beams 111 may have one or more openings, and the base plate 112 may cover one or more openings. This application is not limited to this.

[0084] In some embodiments, the base plate 112 is disposed at the bottom of the battery device 10 along the direction of gravity, such that the base plate 112 covers the downward opening of the space enclosed by the side beams 111.

[0085] In some embodiments, the space enclosed by the side beams 111 has two openings along the height direction, and the box body 11 may also include a cover plate, which is disposed opposite to the bottom plate 112 and covers the two openings respectively.

[0086] The battery device 10 of this application embodiment may include one or more battery cells 20. In addition, the shape of the battery cell 20 in this application embodiment can be set according to the actual application. For example, the battery cell 20 can be cylindrical, or it can be cuboid or other shapes. This application embodiment is not limited to this.

[0087] In some embodiments, to improve the space utilization within the battery device 10, the battery cells 20 within the battery device 10 are typically arranged in a certain pattern. For example, as... Figure 2 As shown, the battery device 10 may include a plurality of battery cells 20 arranged along the first direction X; further, if the number of battery cells 20 in the battery device 10 is large, a group of a plurality of battery cells 20 arranged along the first direction X is a battery cell assembly 15, and the battery device 10 may also include a plurality of battery cell assemblies 15 arranged along the second direction Y.

[0088] The battery assembly 10 may also include an expansion beam 113. The expansion beam 113 may be disposed between the side beams 111 and divide the accommodating space 110 into a first accommodating space 1101 and a second accommodating space 1102. The first accommodating space 1101 may be used to accommodate electrical components 12, and the second accommodating space 1102 may be used to accommodate battery cells 20.

[0089] In some embodiments, the battery device 10 may include a plurality of side beams 111, and an expansion beam 113 may be disposed between two oppositely disposed side beams 111.

[0090] In some embodiments, the battery device 10 may also include a plurality of expansion beams 113. For example, the battery device 10 may include two expansion beams 113, which can divide the receiving space 110 into a second receiving space located between the two expansion beams 113 and a first receiving space 1101 located between the expansion beam 113 and the side beam 111. The first receiving space 1101 may include a first subspace and a second subspace. The first subspace is located between one of the two expansion beams 113 and the oppositely arranged side beam 111, and the second subspace is located between the other of the two expansion beams 113 and the oppositely arranged side beam 111.

[0091] It should be understood that the electrical component 12 may be located in the first subspace or the second subspace, or a portion of the structure of the electrical component 12 may be located in the first subspace and another portion of the structure may be located in the second subspace. The embodiments of this application are not limited thereto.

[0092] It should also be understood that multiple expansion beams 113 can be arranged at intervals along the thickness direction of the expansion beams 113, and the thickness direction of the expansion beams 113 can be as follows: Figure 2 The first direction X or the second direction Y is shown.

[0093] In some embodiments, the expansion beam 113 may abut against the sidewall of at least one battery cell 20. In this way, the expansion beam 113 can resist the expansion force of the battery cell 20, reducing the risk of the battery cell assembly 15 moving or deforming due to the expansion force.

[0094] In some embodiments, the battery device 10 includes a battery cell assembly 15, which includes a plurality of battery cells 20 arranged along a first direction X, and an expansion beam 113 abuts against the end of the battery cell assembly 15 along the first direction X.

[0095] It should be understood that when the battery device 10 includes one expansion beam 113, the expansion beam 113 can abut against any end of the battery cell assembly 15 along the first direction X; when the battery device 10 includes two expansion beams 113, the expansion beams 113 can abut against both ends of the battery cell assembly 15 along the first direction X.

[0096] In some embodiments, the expansion beam 113 may also extend along its length direction, thereby enabling both ends of the expansion beam 113 along its length direction to be connected to the side beam 111. The length direction of the expansion beam 113 may be parallel to, for example, Figure 2 The first direction X or the second direction Y is shown.

[0097] It should be understood that the length direction of the expansion beam 113 can be perpendicular to the thickness direction. For example... Figure 2As shown, when the thickness direction of the expansion beam 113 is parallel to the first direction X, the length direction of the expansion beam 113 can be parallel to the second direction Y, or when the thickness direction of the expansion beam 113 is parallel to the second direction Y, the length direction of the expansion beam 113 can be parallel to the first direction X. The embodiments of this application do not limit this.

[0098] The expansion beam 113 can be connected to the side beam 111, which can improve the overall structural stability of the battery device 10 and further transfer the expansion force of the battery cell 20 to the housing through the expansion beam 113, reducing the risk of local structural failure of the expansion beam 113 due to the concentration of expansion force and improving the overall resistance to expansion force of the battery device 10.

[0099] It should be understood that the expansion beam 113 can be connected to any part of the side beam 111, and the way the two are connected is not limited, as long as the connection between the two is fixed.

[0100] The battery device 10 may also include a thermal management component, which can be used to regulate the temperature of the battery cells 20 and / or electrical components 12, thereby ensuring that the battery cells 20 and / or electrical components 12 are within their normal operating temperature range.

[0101] For example, the battery device 10 may include a first heat exchange plate 131 located at the bottom of the first receiving space 1101, and an electrical component 12 located on the first heat exchange plate 131. The first heat exchange plate 131 has a flow channel for heat exchange fluid to pass through, and the heat exchange fluid can be used to regulate the temperature of the electrical component 12.

[0102] It should be understood that the first heat exchange plate 131 can be directly disposed on the base plate 112 or embedded in the base plate 112, and the embodiments of this application are not limited thereto. For example, the base plate 112 is provided with a clearance area corresponding to the position of the first heat exchange plate 131, and the first heat exchange plate 131 is embedded in the inner sidewall of the base plate 112 near the clearance area, thereby covering the clearance area, so that in the thickness direction of the base plate 112, the first receiving space 1101 is separated from the space on the side of the base plate 112 away from the first receiving space 1101.

[0103] It should also be understood that the first heat exchange plate 131 can be a one-piece molded component or a separate structure. For example, the first heat exchange plate 131 is a plate-shaped structure with an internal cavity, the internal cavity forming a flow channel for the heat exchange fluid to pass through. As another example, the first heat exchange plate 131 may include two plates, upper and lower, with grooves facing each other, and the two plates are connected and assembled to form the first heat exchange plate 131, the grooves of the upper and lower plates forming the flow channel of the first heat exchange plate 131.

[0104] In some embodiments, the battery device 10 may further include a heat exchange tube 132, which is connected to the flow channel of the first heat exchange plate 131 and can be used to deliver heat exchange fluid to the first heat exchange plate 131.

[0105] It should be understood that the heat exchange fluid can flow from the heat exchange tube 132 to the first heat exchange plate 131, or from the first heat exchange plate 131 to the heat exchange tube 132. In some embodiments, a heat exchange tube 132 can be respectively provided at both ends of the flow channel of the first heat exchange plate 131, so that the first heat exchange tube 132 at one end of the flow channel delivers the heat exchange fluid to the first heat exchange plate 131, and the heat exchange fluid after heat exchange flows from the other end of the flow channel to the second heat exchange tube 132.

[0106] For example, when the electrical component 12 needs to be cooled, the cooler heat exchange fluid can flow from the first heat exchange tube 132 to the first heat exchange plate 131. After exchanging heat with the electrical component 12, the temperature of the heat exchange fluid increases, and the cooled heat exchange fluid flows out of the first heat exchange plate 131 from the second heat exchange tube 132. Alternatively, when the electrical component 12 needs to be heated, the warmer heat exchange fluid can flow from the first heat exchange tube 132 to the first heat exchange plate 131. After exchanging heat with the electrical component 12, the temperature of the heat exchange fluid decreases, and the cooled heat exchange fluid flows out of the first heat exchange plate 131 from the second heat exchange tube 132.

[0107] In this way, heat exchange fluid is continuously supplied to the first heat exchange plate 131 through the heat exchange tube 132. With the flow of the heat exchange fluid, temperature exchange can be continuously carried out with the electrical component 12 to maintain a suitable temperature environment for the electrical component 12.

[0108] It should be understood that the heat exchange tube 132 and the first heat exchange plate 131 can be sealed together, so that the heat exchange fluid only flows inside the thermal management component, reducing the risk of short circuits caused by the heat exchange fluid flowing into the first containment space 1101 where the electrical component 12 is located or the second containment space where the battery cell is located.

[0109] In some embodiments, the wall enclosing the first receiving space 1101 may be provided with at least one through hole 101. The at least one through hole 101 may be used to connect the first receiving space 1101 with the space of the bottom plate 112 away from the first receiving space 1101, so as to drain the leakage in the event of leakage (e.g., heat exchange fluid leakage) in the first receiving space 1101.

[0110] It should be understood that the walls enclosing the first accommodating space 1101 may include a portion of the side beams 111, a portion of the bottom plate 112, and a portion of the expansion beams 113 that enclose the first accommodating space 1101.

[0111] In some embodiments, the wall enclosing the first accommodating space 1101 may further include a first heat exchange plate 131. For example, if the first heat exchange plate 131 is embedded in the bottom plate 112 and covers the clearance space of the bottom plate 112, then the wall enclosing the first accommodating space 1101 may include a portion of the side beam 111, a portion of the bottom plate 112, a portion of the expansion beam 113, and the first heat exchange plate 131.

[0112] The through hole 101 can be set at any position of the part of the side beam 111, part of the bottom plate 112 and part of the expansion beam 113 that enclose the first accommodating space 1101, or the through hole 101 can be set at any position of the part of the side beam 111, part of the bottom plate 112, part of the expansion beam 113 and the first heat exchange plate 131 that enclose the first accommodating space 1101.

[0113] In addition, one or more through holes 101 can be provided. For example, one or more through holes 101 can be provided on the base plate 112, so that the first receiving space 1101 and the space on the side of the base plate 112 away from the first receiving space 1101 can be directly connected. As another example, one or more through holes 101 can also be provided on the expansion beam 113, but the embodiments of this application are not limited thereto.

[0114] By providing the through hole 101, in the event of leakage inside the first receiving space 1101, the leakage can be discharged from the first receiving space 1101 through the through hole 101, thereby reducing the accumulation of leakage in the first receiving space 1101, thereby reducing the risk of short circuits, thermal runaway and other problems caused by leakage, and improving the reliability of the battery device 10.

[0115] Next, we will combine Figures 3 to 6 Describe the possible locations where through hole 101 may be located. Figure 5 This paper shows a schematic diagram of the structure of an expansion beam 113 provided in an embodiment of this application; Figure 6 It shows Figure 2 An enlarged schematic diagram of part B of the battery device shown.

[0116] In some embodiments, such as Figures 3 to 5 As shown, at least one through hole 101 may include a first through hole 101a. The interior of the expansion beam 113 is a cavity. The expansion beam 113 has a first sidewall 1131 perpendicular to the thickness direction of the expansion beam 113. The first sidewall 1131 is close to the first receiving space 1101. The first through hole 101a is disposed on the first sidewall 1131. The first through hole 101a communicates with the first receiving space 1101. A second through hole 102 is provided at the bottom of the expansion beam 113. The second through hole 102 communicates with the space on the side of the bottom plate 112 away from the first receiving space 1101. Both the first through hole 101a and the second through hole 102 communicate with the cavity.

[0117] It should be understood that the number of the first through hole 101a and the second through hole 102 can be one or more, and the embodiments of this application are not limited thereto.

[0118] In some embodiments, the bottom of the expansion beam 113 may be provided with a plurality of second through holes 102 spaced apart along the length of the expansion beam 113. This can increase the speed at which leakage discharges from the first receiving space 1101 and further reduce the risk of short circuit caused by leakage accumulation in the electrical components 12.

[0119] In some embodiments, the first sidewall 1131 of the expansion beam 113 may be provided with only one first through hole 101a. In this way, while ensuring that the leakage can be smoothly discharged from the cavity of the expansion beam 113, it can also reduce the entry of other debris (such as dust, water vapor, high-temperature substances ejected by thermal runaway of battery cells, etc.) in the space of the bottom plate 112 away from the first receiving space 1101 into the first receiving space 1101, thereby reducing the impact on the electrical components 12 and improving the service life of the electrical components 12.

[0120] In some embodiments, the first through hole 101a may be provided on the first sidewall 1131 of the expansion beam 113 at a position close to the bottom plate 112 along the height direction of the expansion beam 113.

[0121] When there is leakage in the first receiving space 1101, the leakage will flow towards the bottom plate 112 due to gravity. Therefore, by setting the first through hole 101a close to the bottom plate 112, the leakage can be quickly discharged from the first receiving space 1101 through the first through hole 101a.

[0122] It should be understood that the height direction of the expansion beam 113 can be parallel to the thickness direction of the base plate 112, and both can be parallel to the height direction Z of the battery device 10.

[0123] In some embodiments, the first through hole 101a is disposed on the first sidewall 1131 at a position close to the base plate 112. It should be understood that the first through hole 101a being close to the base plate 112 can mean that the distance between the first through hole 101a and the base plate 112 along the height direction of the expansion beam 113 can be 0.

[0124] In some embodiments, along the thickness direction of the base plate 112, the bottom of the expansion beam 113 is flush with the base plate 112 on the side near the first receiving space 1101, or, along the thickness direction of the base plate 112, on the side near the first receiving space 1101, the base plate 112 extends beyond the bottom of the expansion beam 113.

[0125] It should be understood that the bottom of the expansion beam 113 can refer to the lowest point of the expansion beam 113 along the direction of gravity. This arrangement allows the leaking liquid to flow smoothly into the interior of the expansion beam 113 from the first through hole 101a and out from the second through hole 102.

[0126] In this embodiment, on the one hand, the expansion beam 113 is set as a cavity, which can provide a buffer space to resist the expansion force of the battery cell 20 and reduce the overall weight of the battery device 10; on the other hand, by utilizing the cavity of the expansion beam 113, a through hole is provided in the expansion beam 113, so that the expansion beam can serve as a drainage channel for leakage, allowing the leakage to flow out from the first receiving space 1101. This reduces the need for additional drainage pipes, reduces the space occupied by the battery device 10, and only requires the opening of a through hole to achieve leakage discharge. Its structure is simple and helps to reduce processing costs.

[0127] It should be understood that a certain distance may exist between the first through hole 101a and the second through hole 102 along the length direction of the expansion beam 113. The length direction of the expansion beam 113 may be parallel to the length or width direction of the battery device 10.

[0128] In some embodiments, the distance between the first through hole 101a and the second through hole 102 along the length direction of the expansion beam 113 is greater than or equal to one-third of the length of the expansion beam 113. For example, the distance between the first through hole 101a and the second through hole 102 along the length direction of the expansion beam 113 is equal to half the length of the expansion beam 113.

[0129] With this configuration, if there are other debris in the space on the side of the base plate 112 away from the first receiving space 1101, the debris (such as dust, water vapor, high-temperature substances ejected by thermal runaway of battery cells, etc.) can be reduced from entering the first receiving space 1101 through the second through hole 102 and the first through hole 101a, thereby reducing the impact on the electrical components 12 and improving the service life of the electrical components 12.

[0130] In some embodiments, such as Figure 6 As shown, at least one through hole 101 may also include a third through hole 101b, which may be disposed on the base plate 112.

[0131] When there is leakage in the first receiving space 1101, the leakage will flow towards the bottom plate 112 due to gravity. By setting the third through hole 101b on the bottom plate 112, the leakage can be quickly discharged from the first receiving space 1101 through the third through hole 101b.

[0132] It should be understood that the third through hole 101b can be set at a position on the bottom plate 112 that avoids the first heat exchange plate 131. The third through hole 101b can also be set at a position on the bottom plate 112 that covers the first heat exchange plate 131. In this case, the first heat exchange plate 131 can also be provided with a through hole at the position corresponding to the third through hole 101b, so that the first receiving space 1101 is connected to the space on the side of the bottom plate 112 away from the first receiving space 1101.

[0133] Furthermore, the number of third through holes 101b can be one or more. In some embodiments, one third through hole 101b can be provided. In this way, leakage can be allowed to flow out of the first receiving space 1101, and other debris (such as dust, water vapor, high-temperature substances ejected from the thermal runaway of battery cells, etc.) that may exist on the side of the base plate 112 away from the first receiving space 1101 can be prevented from entering the first receiving space 1101 through the third through hole 101b, thereby reducing the impact on the electrical components 12 and improving the service life of the electrical components 12.

[0134] In some embodiments, the size L1 of the third through hole satisfies: 0mm < L1 ≤ 5mm. Specifically, the size L1 of the third through hole can be any of the following values ​​or between any of the following values: 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm.

[0135] It should be understood that the dimension of the third through hole 101b can refer to the maximum dimension of the third through hole 101b. For example, if the cross-section of the third through hole 101b is circular, the dimension of the third through hole 101b can refer to the diameter of the circle. As another example, if the cross-section of the third through hole 101b is rectangular, the dimension of the third through hole 101b can refer to the side length or diagonal length of the rectangle.

[0136] By setting the size L1 of the third through hole within this range, it is possible to ensure that the third through hole has a certain size so that the leakage liquid can flow out of the first receiving space 1101. At the same time, the size of the third through hole is avoided to be too large, thereby preventing other debris (such as dust, water vapor, high-temperature substances ejected by thermal runaway of battery cells, etc.) that may exist on the side of the base plate 112 away from the first receiving space 1101 from entering the first receiving space 1101 through the third through hole 101b, thereby reducing the impact on the electrical components 12 and improving the service life of the electrical components 12.

[0137] It should be understood that, referring to the size of the third through hole 101b, in order to ensure that the leaked liquid can flow smoothly out of the first receiving space 1101, and to ensure that other debris that may exist on the side of the bottom plate 112 away from the first receiving space 1101 can enter the first receiving space 1101, the size of the first through hole 101a and the size of the second through hole 102 can also be within the same or similar range as the size of the third through hole 101b. The embodiments of this application will not be described in detail here.

[0138] In some embodiments, continue to refer to Figure 6 At least one through hole 101 may also include a fourth through hole 101c. The fourth through hole 101c may be disposed on the first heat exchange plate 131, and on a plane perpendicular to the thickness direction of the first heat exchange plate 131, the projection of the fourth through hole 101c is offset from the projection of the flow channel inside the first heat exchange plate 131.

[0139] It should be understood that the projection of the fourth through hole 101c is offset from the projection of the flow channel inside the first heat exchange plate 131. This means that on a plane perpendicular to the thickness direction of the first heat exchange plate 131, the projection of the fourth through hole 101c does not coincide with the projection of the flow channel inside the first heat exchange plate 131.

[0140] By providing a fourth through hole 101c on the first heat exchange plate 131, the speed at which the leaked liquid flows out of the first receiving space 1101 can be further increased, thereby reducing the risk of short circuit of electrical components 12 caused by the accumulation of leaked liquid inside the first receiving space 1101.

[0141] It should be understood that when the first heat exchange plate 131 is embedded in the base plate 112, any leakage that may occur in the first receiving space 1101 can flow out directly through the fourth through hole 101c; when the first heat exchange plate 131 is set on the base plate 112, the base plate 112 is also provided with a through hole at the position corresponding to the fourth through hole 101c, so that the first receiving space 1101 is connected to the space on the side of the base plate 112 away from the first receiving space 1101.

[0142] It should also be understood that the number of fourth through holes 101c can be one or more, and the size setting of the fourth through hole 101c can refer to the size setting of the third through hole 101b. The embodiments of this application will not be described again here.

[0143] Figure 7 As shown Figure 4 A partial enlarged view (C) of the battery device 10 shown. Figures 3 to 7 As shown, in some embodiments, the housing 11 may further include a reinforcing beam 114, which may be located in the first accommodating space 1101, and the reinforcing beam 114 may extend along the thickness direction of the expansion beam 113, and the two ends of the reinforcing beam 114 along the thickness direction of the expansion beam 113 are respectively connected to the expansion beam 113 and the side beam 111.

[0144] It should be understood that the reinforcing beam 114 extends along the thickness direction of the expansion beam 113, such that both ends of the reinforcing beam 114 abut against the expansion beam 113 and the side beam 111, respectively, along the thickness direction of the expansion beam 113. This arrangement allows the reinforcing beam 114 to provide support for the expansion beam 113, thereby strengthening the structural strength of the expansion beam 113 and further enhancing its ability to resist the expansion force of the battery cell 20.

[0145] One or more reinforcing beams 114 can be provided, and the reinforcing beams 114 can be located at any position in the first accommodating space 1101, as long as they can assist the expansion beams 113 in resisting the expansion force generated by the battery cell 20.

[0146] In some embodiments, the reinforcing beam 114 may be disposed between the electrical component 12 and a location prone to leakage. For example, the location where the heat exchange tube 132 is connected to the first heat exchange plate 131 is prone to leakage due to loose connections or aging seals. By disposing the reinforcing beam 114 between this location and the electrical component 12, the leakage location is isolated from the electrical component 12, thereby further reducing the risk of short circuits caused by contact with leakage in the electrical component 12.

[0147] Continue to refer to Figure 7 In some embodiments, in the thickness direction of the reinforcing beam 114, the location where the heat exchange tube 132 is connected to the first heat exchange plate 131 and the location of the electrical component 12 are located on opposite sides of the reinforcing beam 114; the location where the heat exchange tube 132 is connected to the first heat exchange plate 131 and the location of at least one through hole 101 are located on the same side of the reinforcing beam 114.

[0148] It should be understood that the thickness direction of the reinforcing beam 114 can be parallel to the length direction of the expansion beam 113.

[0149] In the thickness direction of the reinforcing beam 114, the positions where the heat exchange tube 132 connects to the first heat exchange plate 131 and the electrical component 12 are located on both sides of the reinforcing beam 114, thereby separating the two by the reinforcing beam 114.

[0150] In the thickness direction of the reinforcing beam 114, the location where the heat exchange tube 132 is connected to the first heat exchange plate 131 and the location of at least one through hole 101 are located on the same side of the reinforcing beam 114. That is, the location of at least one through hole 101 is set on the side of the reinforcing beam 114 away from the electrical component 12 and close to the side where the heat exchange tube 132 is connected to the first heat exchange plate 131. Since the location where the heat exchange tube 132 is connected to the first heat exchange plate 131 is prone to leakage, setting the through hole 101 at the location where leakage is prone to occur can drain the leakage in time in case of leakage, thereby reducing the risk of short circuit caused by leakage accumulating in the electrical component 12 and improving the reliability of the battery device 10.

[0151] It should be understood that the reinforcing beam 114 may have a certain height. For example, the height of the reinforcing beam 114 may be about half the height of the expansion beam 113. Or, for example, the reinforcing beam 114 may be flush with the expansion beam 113 along the height direction of the expansion beam 113, thereby further dividing the first accommodating space 1101 into two subspaces.

[0152] The reinforcing beam 114 is set at a certain height so as to physically block the leaking liquid and prevent the leaking liquid accumulated on the base plate 112 from crossing the reinforcing beam 114 and contacting the electrical component 12, thereby further reducing the risk of short circuit of the electrical component 12.

[0153] In some embodiments, the reinforcing beam 114 is sealed to the expansion beam 113, the side beam 111, and the base plate 112, respectively, and the expansion beam 113 is also sealed to the base plate 112. For example, sealant can be applied at the above-mentioned connection locations.

[0154] This design prevents leakage from passing through the gaps in the connection and contacting the electrical components 12 or the battery cell 20, while also accelerating the flow of leakage from the through hole 101 out of the first receiving space 1101, thereby reducing the risk of a short circuit in the battery device 10 as a whole.

[0155] It should be understood that the space on the side of the base plate 112 away from the first receiving space 1101 can be the internal space of the battery device 10 or the external space of the battery device 10.

[0156] In some embodiments, continue to refer to Figure 7 The housing 11 may also include a bottom guard plate 115, which may be disposed on the side of the bottom plate 112 away from the first accommodating space 1101.

[0157] By setting the bottom protective plate 115, the overall rigidity of the battery device 10 can be improved, and it can block external impacts, improve the reliability of the battery device 10, and isolate the intrusion of external dust, mud and water, etc., reducing the risk of short circuit of the battery device 10.

[0158] In some embodiments, continue to refer to Figure 7 The bottom protective plate 115 can be connected to the side beam 111. The bottom protective plate 115, the side beam 111 and the bottom plate 112 together form a third receiving space 1103. The through hole 101 can be used to connect the first receiving space 1101 and the third receiving space 1103, so that if there is leakage in the first receiving space 1101, the leakage can flow from the through hole 101 to the third receiving space 1103.

[0159] It should be understood that the bottom guard plate 115 can be recessed in a direction away from the bottom plate 112, thereby forming a third receiving space 1103.

[0160] The third receiving space 1103 can provide a certain buffer when the battery device 10 is subjected to external impact, thereby delaying the intrusion of external force into the battery device 10 and extending the service life of the battery device 10. In addition, the through hole 101 directs the leakage liquid into the third receiving space 1103, thereby collecting the leakage liquid and facilitating centralized treatment of the leakage liquid, which is convenient for drainage and cleaning.

[0161] In some embodiments, the battery device 10 may further include a leak detector 14, which can be used to detect whether a leak exists. This allows for timely detection of any liquid leak, enabling rapid action based on the leak situation, such as shutting down the device, disconnecting the power, waiting for the leak to completely drain, or inspecting the specific location of the leak.

[0162] It should be understood that the leak detector 14 can be set at any location on the battery device 10 where a leak can be detected. For example, the leak detector 14 can be set on the base plate 112, on the first heat exchange plate 131, or on the bottom protective plate 115.

[0163] In some embodiments, the leak detector 14 may be disposed on the bottom protective plate 115 near at least one through hole 101.

[0164] It should be understood that the leak detector 14 can be set on the bottom cover plate 115 directly opposite the through hole 101, or it can be set on the bottom cover plate 115 slightly off the through hole 101, so that the leak detector 14 can quickly detect leaks.

[0165] In some embodiments, in the thickness direction of the base plate 112, the bottom guard plate 115 is recessed in a direction away from the base plate 112, and the minimum distance between the location of the bottom guard plate 115 where the leakage detector 14 is located and the base plate 112 is greater than the maximum distance between other locations of the bottom guard plate 115 and the base plate 112.

[0166] That is, the recessed area of ​​the bottom protective plate 115 where the leak detector 14 is located can be greater than that of other areas in the bottom protective plate 115. In this way, after the leak flows onto the bottom protective plate 115, due to gravity, the leak will concentrate and flow towards the leak detector 14, so that even if the amount of leaked liquid is small, the leak detector 14 can quickly detect the leak, thus improving detection efficiency.

[0167] In some embodiments, continue to refer to Figures 2 to 7 The battery device 10 may also include a second heat exchange plate 133, which is located in the second accommodating space 1102 and is in contact with at least one side of the battery cell 20. The second heat exchange plate 133 has a flow channel for heat exchange fluid to pass through and is used to regulate the temperature of the battery cell 20.

[0168] It should be understood that the second heat exchange plate 133 can be disposed between any two adjacent battery cells 20 of the plurality of battery cells 20, thereby being in contact with the battery cells 20. The second heat exchange plate 133 can also be disposed between one or more groups of two adjacent battery cells 20 of the plurality of battery cells 20, thereby being in contact with the battery cells 20.

[0169] It should also be understood that the second heat exchange plate 133 can be a one-piece molded component or a separate structure. For example, the second heat exchange plate 133 is a plate-shaped structure with an internal cavity, the internal cavity forming a flow channel for the heat exchange fluid to pass through. As another example, the second heat exchange plate 133 may include two plates, upper and lower, with grooves facing each other, and the two plates are connected and assembled to form the second heat exchange plate 133, the grooves of the upper and lower plates forming the flow channel of the second heat exchange plate 133.

[0170] In addition, one or more second heat exchange plates 133 can be provided. For example, multiple second heat exchange plates 133 can be provided, and multiple adjacent battery cells 20 are provided with a second heat exchange plate 133.

[0171] In some embodiments, the battery device 10 may include a plurality of battery cells 20 arranged along the thickness direction of the expansion beam 113, and the battery device 10 may also include a plurality of second heat exchange plates 133, wherein at least one set of two adjacent battery cells 20 are provided with a second heat exchange plate 133 in the thickness direction of the expansion beam 113.

[0172] It should be understood that a second heat exchange plate 133 can be provided between any two adjacent battery cells 20, that is, a second heat exchange plate 133 is provided on both sides of any battery cell 20 along the thickness direction of the expansion beam 113. Alternatively, one second heat exchange plate 133 and two (or three, or more) battery cells 20 are arranged sequentially along the thickness direction of the expansion beam 113, such that the second heat exchange plate 133 is provided between some adjacent battery cells 20. The thickness direction of the expansion beam 113 can be parallel to the first direction X shown in the figure.

[0173] Continue to refer to Figures 2 to 7 In some embodiments, the battery device 10 may further include a current collector 130. The current collector 130 is disposed in the second receiving space 1102, and the second heat exchange plate 133 may communicate with the current collector.

[0174] By setting the current collector 130, a unified heat exchange fluid can be provided for multiple second heat exchange plates 133, thereby reducing the space occupied by the thermal management components inside the battery device 10 and improving the heat exchange efficiency between the second heat exchange plates 133 and the battery cells 20.

[0175] In some embodiments, the current collector 130 may also be in communication with the first heat exchange plate 131, thereby providing heat exchange fluid to the first heat exchange plate 131.

[0176] Specifically, the current collector 130 can be connected to the first heat exchange plate 131 through the heat exchange tube 132. Since the first heat exchange plate 131 and the second heat exchange plate 133 are located in the first receiving space 1101 and the second receiving space 1102 respectively, the heat exchange tube 132 serves as an intermediate transition structure to connect the current collector 130 to the first heat exchange plate 131. This facilitates the adjustment and installation of the various structural components of the thermal management assembly, thereby improving assembly flexibility and reducing assembly difficulty.

[0177] It should be understood that the heat exchange tube 132 may extend to the second receiving space 1102 to communicate with the current collector 130, or the current collector 130 may extend to the first receiving space 1101 to communicate with the heat exchange tube 132, and the embodiments of this application are not limited in this respect.

[0178] In some embodiments, the current collector 130 extends along the thickness direction of the expansion beam 113 such that at least a portion of the current collector 130 is located in the first receiving space 1101 and communicates with the heat exchange tube 132 in the first receiving space 1101.

[0179] By setting the connection point between the current collector 130 and the heat exchange tube 132 within the first receiving space 1101, the risk of short circuit in the battery cell 20 due to leakage at the connection point can be reduced. In addition, the first receiving space 1101 is provided with a through hole 101, so that even if heat exchange fluid leaks, it can be quickly discharged through the through hole 101, reducing the residence time of the leaked fluid inside the receiving space and reducing the risk of short circuit in the battery cell 20 and electrical components 12.

[0180] In some embodiments, the thickness direction of the expansion beam 113 is perpendicular to the plane containing the wall with the largest area in the battery cell 20.

[0181] That is, the expansion beam 113 abuts against the wall with the largest area in the battery cell 20. When the battery device 10 includes multiple battery cells 20, the multiple battery cells 20 are arranged along the thickness direction of the expansion beam 113, that is, the multiple battery cells 20 are arranged along the direction perpendicular to the wall with the largest area of ​​the battery cell 20.

[0182] During the charging and discharging process of a battery cell, the wall with the largest area in the battery cell 20 is most prone to expansion and has the highest degree of expansion deformation. By making the thickness direction of the expansion beam 113 perpendicular to the plane where the wall with the largest area in the battery cell 20 is located, that is, by placing the expansion beam 113 against the wall with the largest area in the battery cell 20, the expansion force generated by the battery cell 20 can be effectively resisted, the deformation of the battery cell 20 can be reduced, and the expansion resistance of the expansion beam 113 can be improved.

[0183] In some embodiments, the battery device 10 further includes a plurality of battery cell assemblies 15 arranged along the length direction of the expansion beam 113, the battery cell assembly 15 including a plurality of battery cells 20 arranged along the thickness direction of the expansion beam 113.

[0184] That is, the expansion beam 113 extends along the direction in which the multiple battery cell modules 15 are arranged, thereby abutting against the multiple battery cell modules 15, so that each row of battery cells can abut against the expansion beam 113, thereby improving the overall anti-expansion performance of the battery device 10.

[0185] It should be understood that the battery device 10 may also include a plurality of second heat exchange plates 133. The plurality of second heat exchange plates 133 may be arranged at intervals between two adjacent battery cells 20 along the thickness direction of the expansion beam 113, or the plurality of second heat exchange plates 133 may be arranged at intervals between two adjacent battery cells 20 along the length direction of the expansion beam 113. The embodiments of this application are not limited thereto.

[0186] In some embodiments, in the thickness direction of the expansion beam 113, a second heat exchange plate 133 is provided between at least one set of two adjacent battery cells 20, and the second heat exchange plate 133 extends along the length direction of the expansion beam 113; a current collector 130 is provided on at least one side of the plurality of battery cell assemblies 15 along the length direction of the expansion beam 113, and the second heat exchange plate 133 communicates with the current collector 130 at its end near the current collector 130.

[0187] The second heat exchange plate 133 is disposed between multiple battery cells 20 along the thickness direction of the expansion beam 113, and the current collector 130 is disposed on one or both sides of the multiple battery cell assembly 15 along the length direction of the expansion beam 113. In this way, the second heat exchange plate 133 can exchange heat with the wall with the largest area in the battery cell 20, thereby improving heat exchange efficiency. The relative positions of the second heat exchange plate 133 and the current collector 130 allow the current collector 130 to communicate with the end of the second heat exchange plate 133, thereby uniformly supplying heat exchange fluid to multiple second heat exchange plates 133, thus improving the overall structural compactness of the battery device 10 and reducing space waste.

[0188] According to some embodiments of this application, this application also provides an electrical device, including the battery device 10 described in any of the above embodiments, wherein the battery device 10 provides electrical energy to the electrical device.

[0189] In some implementations, the electrical device can be a vehicle, ship, or spacecraft.

[0190] According to some embodiments of this application, see Figures 2 to 7This application provides a battery device 10, including: a housing 11, the housing 11 including side beams 111, a bottom plate 112, and an expansion beam 113, the side beams 111 and the bottom plate 112 together enclosing a receiving space 110, the expansion beam 113 being disposed between the side beams 111 and dividing the receiving space into a first receiving space 1101 and a second receiving space 1102, the first receiving space 1101 being used to receive electrical components 12, and the second receiving space 1102 being used to receive battery cells 20; a first heat exchange plate 131, the first heat exchange plate 131 being located at the bottom of the first receiving space 1101, the electrical components 12 being used to receive battery cells 20; and a first heat exchange plate 131, the first heat exchange plate 131 being located at the bottom of the first receiving space 1101. Component 12 is located on the first heat exchange plate 131, which has a flow channel for heat exchange fluid to pass through, and the heat exchange fluid is used to regulate the temperature of electrical component 12; heat exchange tube 132 is connected to the flow channel of the first heat exchange plate 131 and is used to deliver heat exchange fluid to the first heat exchange plate 131; at least one through hole 101 is provided in the wall surrounding the first receiving space 1101, and the at least one through hole 101 is used to connect the first receiving space 1101 with the space on the side of the bottom plate 112 away from the first receiving space 1101, so as to drain the leakage in the event of leakage in the first receiving space 1101.

[0191] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The enclosure includes side beams, a bottom plate, and expansion beams. The side beams and the bottom plate together enclose a receiving space. The expansion beams are disposed between the side beams and divide the receiving space into a first receiving space and a second receiving space. The first receiving space is used to receive electrical components, and the second receiving space is used to receive individual battery cells. A first heat exchange plate is located at the bottom of the first accommodating space, and the electrical component is located on the first heat exchange plate. The first heat exchange plate has a flow channel for heat exchange fluid to pass through, and the heat exchange fluid is used to regulate the temperature of the electrical component. A heat exchange tube, which is connected to the flow channel of the first heat exchange plate, is used to deliver the heat exchange fluid to the first heat exchange plate; The wall enclosing the first receiving space is provided with at least one through hole, the at least one through hole being used to connect the first receiving space with the space on the side of the bottom plate away from the first receiving space, so as to drain the leakage in the event of leakage in the first receiving space; The at least one through hole includes a first through hole, the interior of the expansion beam is a cavity, the expansion beam has a first sidewall perpendicular to the thickness direction of the expansion beam, the first sidewall is close to the first receiving space, and the first through hole is disposed on the first sidewall; The first through hole is connected to the first accommodating space. The bottom of the expansion beam is provided with a second through hole, which is connected to the space on the side of the bottom plate away from the first accommodating space. Both the first through hole and the second through hole are connected to the cavity.

2. The battery device according to claim 1, characterized in that, The distance between the first through hole and the second through hole along the length of the expansion beam is greater than or equal to one-third of the length of the expansion beam.

3. The battery device according to claim 1, characterized in that, The first through hole is located on the first sidewall at a position close to the bottom plate along the thickness direction of the first heat exchange plate.

4. The battery device according to claim 1, characterized in that, The at least one through hole also includes a third through hole, and the third through hole is provided on the base plate.

5. The battery device according to claim 4, characterized in that, The size L1 of the third through hole satisfies: 0mm < L1 ≤ 5mm.

6. The battery device according to claim 1, characterized in that, The at least one through hole further includes a fourth through hole, which is provided on the first heat exchange plate. On a plane perpendicular to the thickness direction of the first heat exchange plate, the projection of the fourth through hole is offset from the projection of the flow channel.

7. The battery device according to any one of claims 1 to 6, characterized in that, The enclosure also includes a reinforcing beam located in the first accommodating space. The reinforcing beam extends along the thickness direction of the expansion beam, and its two ends along the thickness direction of the expansion beam are connected to the expansion beam and the side beam, respectively.

8. The battery device according to claim 7, characterized in that, In the thickness direction of the reinforcing beam, the position where the heat exchange tube is connected to the first heat exchange plate and the position of the electrical component are located on opposite sides of the reinforcing beam, while the position where the heat exchange tube is connected to the first heat exchange plate and the position of the at least one through hole are located on the same side of the reinforcing beam.

9. The battery device according to claim 8, characterized in that, The reinforcing beam is sealed to the expansion beam, the side beam, and the bottom plate, respectively, and the expansion beam is sealed to the bottom plate.

10. The battery device according to any one of claims 1 to 6, characterized in that, The enclosure also includes a bottom protective plate, which is disposed on the side of the bottom plate away from the first accommodating space. The bottom protective plate is connected to the side beam to form a third accommodating space, and the at least one through hole is used to connect the first accommodating space and the third accommodating space.

11. The battery device according to claim 10, characterized in that, The battery device also includes a leakage detector, which is used to detect whether there is leakage. The leakage detector is disposed on the bottom protective plate near the at least one through hole. In the thickness direction of the base plate, the bottom guard plate is recessed in a direction away from the base plate, and the minimum distance between the location of the leakage detector on the bottom guard plate and the base plate is greater than the maximum distance between other locations on the bottom guard plate and the base plate.

12. The battery device according to any one of claims 1 to 6, characterized in that, The second accommodating space is provided with a current collector, which extends along the thickness direction of the expansion beam, such that at least a portion of the current collector is located in the first accommodating space and communicates with the heat exchange tube in the first accommodating space; The battery device further includes a second heat exchange plate, which has a flow channel for heat exchange fluid to pass through. The second heat exchange plate is in communication with the current collector and is in contact with at least one side of the battery cell.

13. The battery device according to claim 12, characterized in that, The battery device includes a plurality of battery cells arranged along the thickness direction of the expansion beam, and the battery device also includes a plurality of second heat exchange plates. In the thickness direction of the expansion beam, at least one pair of adjacent battery cells are provided with a second heat exchange plate.

14. The battery device according to claim 13, characterized in that, The thickness direction of the expansion beam is perpendicular to the plane containing the wall with the largest area in the battery cell.

15. The battery device according to claim 13, characterized in that, The battery device further includes a plurality of battery cell assemblies arranged along the length direction of the expansion beam, the battery cell assembly including a plurality of battery cells arranged along the thickness direction of the expansion beam; The current collector is disposed on at least one side of the plurality of battery cell assemblies along the length direction of the expansion beam, and the second heat exchange plate extends along the length direction of the expansion beam and communicates with the current collector at an end near the current collector.

16. An electrical appliance, characterized in that, Includes a battery device according to any one of claims 1 to 15, the battery device being used to provide electrical energy.

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