Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, and relates to the technical field of batteries, the battery device comprises a battery monomer, a structural plate and a sealing part, the structural plate is provided with a first side surface in a first direction, a ventilation groove is formed in the first side surface, and two ports of the ventilation groove in the extension direction penetrate through the peripheral side part of the structural plate; the battery monomers cover the notches of the ventilation grooves; the plurality of sealing parts are distributed on the two sides, perpendicular to the extending direction, of the ventilation groove, the sealing parts are at least partially arranged between the first side face of the structural plate and the battery monomers, and at least one sealing part is arranged to be an elastic sealing part. The sealing part is arranged between the structural plate and the battery monomer, a sufficient sealing effect can be provided for the ventilation groove, the elastic sealing part utilizes the characteristic of elastic deformation of the elastic sealing part, the intensity of pressure borne by the battery monomer is reduced, the probability that an insulating blue film on the outer surface of the battery monomer is crushed is reduced, and the reliability of the battery monomer is improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery device and an electrical device. Background Art

[0002] In the field of new energy batteries, the thermal management system is one of the key technologies to address the thermal-related problems of battery devices and ensure the performance, safety, and lifespan of battery devices. A relatively common thermal management method for the thermal management system is ventilation heat exchange, that is, a ventilation partition is provided between two adjacent battery cells. Currently, the setting of the ventilation partition easily reduces the reliability of the battery cells. Summary of the Utility Model

[0003] The main purpose of this application is to propose a battery device and an electrical device, aiming to improve the problem that the current setting of the ventilation partition easily reduces the reliability of the battery cells.

[0004] In a first aspect, the battery device proposed in this application includes:

[0005] Battery cells;

[0006] A structural plate having a first side in a first direction, a ventilation groove formed on the first side, both ends of the ventilation groove in its extending direction penetrating through the peripheral ends of the structural plate, and the battery cells covering the notch of the ventilation groove; and,

[0007] A plurality of sealing portions distributed on both sides of the ventilation groove perpendicular to the extending direction, at least part of the sealing portions being disposed between the first side of the structural plate and the battery cells, and at least one of the sealing portions being set as an elastic sealing portion.

[0008] The technical solution provided by this application uses a plurality of sealing portions distributed on both sides of the ventilation groove perpendicular to its extending direction and hermetically disposed between the structural plate and the battery cells, which can seal the ventilation groove to prevent the heat exchange air flow from leaking from positions other than the two ends of the ventilation groove, thereby ensuring the ventilation heat exchange efficiency of the battery device; moreover, at least one of the plurality of sealing portions is set as an elastic sealing portion, and the elastic sealing portion can fill the gap between the first side of the structural plate and the battery cells by using its own elastic deformation characteristics, which can not only compensate for the unevenness tolerance of the surface of the battery cells, but also reduce the pressure borne on the surface of the battery cells, that is, reduce the probability of the insulating blue film on the outer surface of the battery cells being damaged, and reduce the risk of condensation failure of the battery cells at the blue film pressing position, thereby improving the reliability of the battery cells.

[0009] In some embodiments, two elastic sealing portions are provided, and the two elastic sealing portions are distributed on both sides of the ventilation groove perpendicular to the extending direction.

[0010] In the above technical solution, two elastic sealing parts are provided, and the two elastic sealing parts are distributed on both sides of the ventilation groove perpendicular to its extending direction. By providing these two elastic sealing parts, the ventilation groove can be sealed, and the increase in the proportion of the number of elastic sealing parts among multiple sealing parts can further improve the reliability of the battery cell.

[0011] In some embodiments, the elastic sealing part is injection-molded on the structural plate.

[0012] In the above technical solution, the elastic sealing part is formed on the structural plate by secondary injection molding, so that the elastic sealing part and the structural plate are integrally arranged, which is convenient for the integrated transportation and assembly of the elastic sealing part and the structural plate. Moreover, the gap between the elastic sealing part and the structural plate can be eliminated, which is beneficial to further reducing the ventilation leakage of the ventilation groove.

[0013] In some embodiments, the elastic sealing part is provided as a sealing foam.

[0014] In the above technical solution, setting the elastic sealing part as a sealing foam can effectively prevent the heat exchange air flow in the ventilation groove from leaking out through the elastic sealing part. At the same time, the sealing foam can also provide buffering for the structural plate and the battery cell by using its own buffering performance, preventing the two from being damaged by hard contact.

[0015] In some embodiments, the sealing foam is bonded to the structural plate.

[0016] In the above technical solution, bonding the sealing foam to the structural plate is not only beneficial to the integrated transportation and assembly of the sealing foam and the structural plate, but also can ensure the stability of the installation position of the sealing foam, preventing the sealing foam from deviating in position during long-term use and resulting in sealing failure.

[0017] In some embodiments, the ventilation groove extends along the second direction and penetrates through both side ends of the structural plate;

[0018] The elastic sealing part is sleeved on the end of the battery cell in the third direction;

[0019] The first direction, the second direction, and the third direction are perpendicular to each other pairwise.

[0020] In the above technical solution, the ventilation groove extends along the second direction, and an elastic sealing portion is sleeved on the end of the battery cell in the third direction. The portion of the elastic sealing portion in the first direction can abut against the first side surface of the structural plate, thereby playing a role in sealing the ventilation groove in the third direction. This solution of arranging the elastic sealing portion based on the straight extension of the ventilation groove utilizes the contraction force of the elastic sealing portion to stably install it on the battery cell. Since the elastic sealing portion is not fixedly connected to the battery cell and the structural plate, it is easier to repair and replace the elastic sealing portion subsequently.

[0021] In some embodiments, the structural plate has two first plate segments distributed along the third direction and a second plate segment located between the two first plate segments, and the first side surface is formed on the first plate segment and the second plate segment;

[0022] A plurality of the sealing portions are distributed on the two first plate segments, the ventilation groove is formed on the second plate segment, and the ventilation groove extends along the second direction and is provided through both side ends of the second plate segment;

[0023] The first direction, the second direction, and the third direction are perpendicular to each other pairwise.

[0024] In the above technical solution, the structural plate is segmented along the third direction, and a plurality of sealing portions are used to provide sealing between the two first plate segments and the battery cell, and the ventilation groove is arranged on the second plate segment. Since the ventilation groove extends along the second direction on the second plate segment, the ventilation resistance suffered by the heat exchange air flow when passing through the ventilation groove is small, the heat exchange circulation air volume of the battery device is large, and the heat exchange efficiency is high.

[0025] In some embodiments, a plurality of the battery cells are arranged along the first direction, the structural plate is arranged between two adjacent battery cells, and has two first side surfaces respectively corresponding to the two battery cells;

[0026] The ventilation groove includes a first groove and a second groove. Both the first groove and the second groove correspond to the second plate segment and are respectively formed on the two first side surfaces, and the first groove and the second groove are alternately arranged along the third direction;

[0027] A plurality of the sealing portions are respectively arranged corresponding to the first groove and the second groove, and are respectively arranged between the two first side surfaces and the corresponding battery cells.

[0028] In the above technical solution, the first groove and the second groove in the ventilation groove both correspond to the second plate segment and are respectively formed on the two first side surfaces, so that a structural plate can take into account the ventilation and heat exchange of two adjacent battery cells, further improving the heat exchange efficiency of the battery device. Moreover, the first groove and the second groove are arranged alternately in the third direction, so that there is a dislocation in the layout of the first groove and the second groove, and the thickness basis of the second plate segment in the first direction can be fully utilized respectively. On the premise of ensuring sufficient strength of the structural plate, the overall ventilation cross-sectional size of the first groove and the second groove remains a relatively large value, which is beneficial to ensuring the heat exchange circulating air volume.

[0029] In some embodiments, first limiting portions are respectively connected to both ends of the first plate segment in the second direction, and the two first limiting portions clamp the battery cell therebetween.

[0030] The structural plates are respectively arranged on both sides of the battery cell in the first direction, and the corresponding first limiting portions in the two structural plates are butted in the first direction.

[0031] Wherein, the sealing portion further extends to the corresponding first limiting portion, and the two sealing portions corresponding in the first direction are butted at the first limiting portion.

[0032] In the above technical solution, the two corresponding sealing portions on the two structural plates further extend between the first limiting portion and the battery cell and are butted in the first direction, which can play a role in restricting the heat exchange air flow from passing through the interface gap between the first limiting portion and the battery cell, and the ventilation pressure in the ventilation groove is ensured.

[0033] In some embodiments, a plurality of battery cells are arranged in the first direction, structural plates are respectively arranged between two adjacent battery cells, at least part of the structural plates are provided with locking connection portions at one end in the third direction, and a pressure relief portion is arranged at one end of the battery cell close to the locking connection portion.

[0034] The battery device further includes a smoke exhaust structure, the smoke exhaust structure is arranged on one side where the pressure relief portion of the battery cell is located, the smoke exhaust structure is formed with a smoke exhaust passage, and the inlet of the smoke exhaust passage corresponds to a plurality of pressure relief portions.

[0035] Wherein, the smoke exhaust structure is locked and connected to the locking connection portion, and the first direction is perpendicular to the third direction.

[0036] In the above technical solution, the battery device further includes a smoke exhaust structure, which forms a smoke exhaust passage. The inlet of the smoke exhaust passage is correspondingly arranged opposite to a plurality of pressure relief parts, and the outlet of the smoke exhaust passage communicates with the outside. When the pressure relief parts are opened, the high-temperature and high-pressure smoke ejected from the inside of the battery cell can be discharged to the outside orderly through the smoke exhaust passage. Moreover, a locking connection part is arranged by using the structural plate, and the locking connection part can provide a stable installation point for the smoke exhaust structure when it spans multiple battery cells, which is beneficial to ensuring the installation stability of the smoke exhaust structure.

[0037] In some embodiments, a support part is arranged in the ventilation groove, and the support part extends along the extending direction of the ventilation groove, and the support part abuts against the battery cell.

[0038] In the above technical solution, a support part is arranged in the ventilation groove, and the support part abuts against the battery cell to prevent the structural plate from deforming due to excessive pressure at the ventilation groove after the assembly of the structural plate and the battery cell is completed, so as to play a role in ensuring the structural stability of the ventilation groove, and further ensure that the ventilation volume of the ventilation groove meets the standard. And limiting the support part to extend along the extending direction of the ventilation groove can provide stable support for each position of the ventilation groove in its extending direction, and the structural stability and reliability of the structural plate are higher.

[0039] In a second aspect, the present application further provides an electrical device, and the electrical device includes the above battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0041] Figure 1 It is a schematic structural diagram of an embodiment where the electrical device provided by the present application is a vehicle;

[0042] Figure 2 It is an exploded structural schematic diagram of an embodiment of the battery device provided by the present application;

[0043] Figure 3 It is an exploded structural schematic diagram of another embodiment of the battery device provided by the present application;

[0044] Figure 4 For Figure 3 the enlarged structural schematic diagram of the partial A in

[0045] Figure 5 For Figure 3Schematic diagram of the assembly structure of the middle battery cell and the structural plate;

[0046] Figure 6 For Figure 3 Schematic diagram of the three-dimensional structure of the middle structural plate;

[0047] Figure 7 For Figure 6 Schematic diagram of the planar structure of the middle structural plate;

[0048] Figure 8 For Figure 7 Schematic diagram of the structure of section B-B in the middle;

[0049] Figure 9 For Figure 8 Enlarged schematic diagram of the local part C in the middle.

[0050] Explanation of the reference numerals in the drawings:

[0051] 1000, vehicle;

[0052] 100, battery device; 200, controller; 300, motor;

[0053] 1, box body; 11, box main body; 12, box cover;

[0054] 2, battery cell; 21, pressure relief part;

[0055] 3, structural plate; 3a, first side; 31, first plate segment; 32, second plate segment; 321, ventilation groove; 321a, first groove; 321b, second groove; 322, support part; 33, first limiting part; 34, second limiting part; 35, locking connection part;

[0056] 4, sealing part; 4a, elastic sealing part;

[0057] 5, smoke exhaust structure; 51, flue cover plate; 52, wire harness plate; 53, sealing foam;

[0058] X, first direction; Y, second direction; Z, third direction.

[0059] The realization of the purpose, functional features and advantages of this application will be further described in combination with the embodiments with reference to the accompanying drawings. Specific embodiments

[0060] Hereinafter, embodiments of the technical solution of this application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of this application more clearly, and thus are only examples and cannot be used to limit the protection scope of this application.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification and claims of this application and the above description of the drawings are intended to cover non-exclusive inclusion.

[0062] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means more than two, unless otherwise specifically defined.

[0063] Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase does not necessarily refer to the same embodiment at every occurrence in the specification, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0064] In the description of the embodiments of this application, the term "a plurality of" means more than two (including two). Similarly, "a plurality of groups" means more than two groups (including two groups), and "a plurality of pieces" means more than two pieces (including two pieces).

[0065] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of this application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of this application.

[0066] In the description of the embodiments of this application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0067] The battery device disclosed in the embodiments of the present application can be used to provide electrical energy for electrical equipment. Among them, the electrical equipment can be, but is not limited to, battery cars, electric vehicles, ships, spacecraft, and so on. Among them, the spacecraft can include airplanes, rockets, space shuttles, and spaceships, and so on.

[0068] For the convenience of description in the following embodiments, a vehicle is taken as an example of an electrical equipment in an embodiment of the present application for description.

[0069] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of an embodiment of a vehicle 1000 provided by the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000. The battery device 100 can be arranged at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0070] In some embodiments of the present application, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0071] For ease of understanding the battery device 100 provided by the present application, please refer to Figure 2 , Figure 2Schematic exploded view of an embodiment of the battery device 100 provided by the present application. The battery device 100 generally includes a box body 1 and battery cells 2. An installation cavity is formed in the box body 1, and the battery cells 2 are loaded through the installation cavity. The basic structure of the box body 1 generally includes a box main body 11 and a box cover 12. The box cover 12 is arranged on the box main body 11 and jointly defines the installation cavity with the box main body 11. Generally speaking, the battery cells 2 are generally arranged in the box main body 11. After the battery device 100 is mounted on the vehicle 1000, the box cover 12 is generally close to the vehicle 1000, and the box main body 11 is generally away from the vehicle 1000; the installation cavity can be mainly formed in the box main body 11. At this time, the box main body 11 can be understood as a basin-shaped structure, and the box cover 12 is covered on the box main body 11 to cover the installation cavity; the installation cavity can also be mainly formed in the box cover 12. At this time, the box cover 12 can be understood as a cover-shaped structure, and the box cover 12 covers the box main body 11 to cover the battery cells 2 carried on the box main body 11 into the box cover 12. Of course, the structure of the box body 1 is not limited to this.

[0072] The number of battery cells 2 in the box body 1 can be one or multiple. Among them, when multiple battery cells 2 are provided, the multiple battery cells 2 can be connected in series, in parallel or in a hybrid connection. A hybrid connection means that there are both series and parallel connections among the multiple battery cells 2. The multiple battery cells 2 can be directly connected in series, in parallel or in a hybrid connection to form a battery unit. Of course, the multiple battery cells 2 can also be in the form that the battery cells 2 are first connected in series, in parallel or in a hybrid connection to form battery modules, and then the multiple battery modules are connected in series, in parallel or in a hybrid connection to form a battery unit. The battery device 100 can also include other structures, such as a busbar component, for realizing the electrical connection between multiple battery cells 2 or multiple battery modules. Among them, each battery cell 2 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 2 can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc.

[0073] Of course, other embodiments of the battery device 100 provided by the present application may not include the box body 1, but are presented in the form of the above-mentioned battery modules.

[0074] In the present application, the battery cell 2 can include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, etc. The embodiments of the present application are not limited thereto. The battery cell 2 can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc. The embodiments of the present application are also not limited thereto. The battery cell 2 is generally divided into three types according to the encapsulation method: cylindrical battery cells, square battery cells and soft-pack battery cells. The embodiments of the present application are also not limited thereto.

[0075] The structure of the battery cell 2 usually includes a shell, an end cover, an electrode assembly and an electrode terminal. The end cover is set on the opening of the shell and defines a receiving cavity together with the shell. The electrode assembly is set in the receiving cavity. The electrode terminal penetrates the end cover and is electrically connected to the pole ear of the electrode assembly through the adapter component. Among them, the electrode assembly is a component in the battery cell 2 where an electrochemical reaction occurs. It is mainly formed by a positive electrode sheet and a negative electrode sheet through a winding or stacking process, and a separation film is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute the pole ear. The positive pole ear and the negative pole ear can be located at one end of the main body or at both ends of the main body respectively. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte filled in the shell.

[0076] In the field of new energy batteries, the thermal management system is one of the key technologies to deal with heat-related problems of battery devices and ensure the performance, safety and life of battery devices. Common thermal management methods of thermal management systems include ventilation heat exchange. "Ventilation heat exchange" means setting a ventilation baffle between two adjacent battery cells. Ventilation grooves are usually set on the ventilation baffle. After the ventilation baffle is attached to the battery cell shell, the notch of the ventilation groove will be blocked by the battery cell shell to form an air duct. In order to ensure the stability of the air duct structure, the material hardness of the ventilation baffle is generally high. In order to ensure that the ventilation leakage of the air duct is lower than the design parameters, the ventilation baffle is usually Sealing ribs are arranged on both sides of the width direction of the ventilation groove (a direction perpendicular to the extension direction of the ventilation groove), and the shell of the battery cell is pressed against the sealing ribs to achieve sealing of the air duct by interference fitting. However, since the current sealing ribs are directly formed on the ventilation baffle, the material hardness of the sealing ribs is also relatively high. When the high-hardness sealing ribs are pressed against the outer shell of the battery cell by interference fitting, the insulating blue film on the surface of the shell of the battery cell is easily pressed white or even broken, which leads to condensation at the damaged part of the blue film. Therefore, it is difficult to ensure the insulation reliability of the battery cell under the premise of ensuring the sealing between the ventilation baffle and the battery cell.

[0077] Analyzing the above problems, it can be seen that it is difficult to take into account both the sealing performance between the ventilation baffle and the battery cell and the insulation reliability of the battery cell. The fundamental reason is that the sealing rib and the ventilation baffle are made of the same hard material. When the hard sealing rib is in interference fit with the insulating blue film on the outer shell surface of the battery cell, it is easy to cause local force concentration on the blue film, resulting in damage.

[0078] In view of this, it can be considered to replace the hard material of the sealing rib with a soft elastic material. The sealing rib made of the soft elastic material, due to the characteristic of its own elastic deformation, can not only more easily ensure the sealing performance between the ventilation partition and the battery cell, but also change the situation of local force concentration on the insulating blue film, and the problem that the blue film is easily crushed is improved. With such a setting, at least the problem that the setting of the ventilation partition in the prior art easily leads to a reduction in the reliability of the battery cell can be improved.

[0079] To facilitate the understanding of the battery device provided by the present application, the following will be described with reference to the accompanying drawings. Figure 3 It is a schematic exploded view of another embodiment of the battery device provided by the present application; Figure 4 is Figure 3 an enlarged structural schematic diagram of the local area A in; Figure 5 is Figure 3 an assembled structural schematic diagram of the battery cell and the structural plate in; Figure 6 is Figure 3 a three-dimensional structural schematic diagram of the structural plate in; Figure 7 is Figure 6 a planar structural schematic diagram of the structural plate in; Figure 8 is Figure 7 a structural schematic diagram of the cross-section B-B in; Figure 9 is Figure 8 an enlarged structural schematic diagram of the local area C in.

[0080] Please refer to Figure 3 , Figure 5 and Figure 6 , in an embodiment of the present application, the battery device 100 includes a battery cell 2, a structural plate 3 and a plurality of sealing parts 4. The structural plate 3 has a first side surface 3a in the first direction X. A ventilation groove 321 is formed on the first side surface 3a. Both ends of the ventilation groove 321 in its extending direction penetrate through the peripheral ends of the structural plate 3. The battery cell 2 covers the notch of the ventilation groove 321; the plurality of sealing parts 4 are distributed on both sides of the ventilation groove 321 perpendicular to the extending direction. At least part of the sealing parts 4 are arranged between the first side surface 3a of the structural plate 3 and the battery cell 2, and at least one of the sealing parts 4 is arranged as an elastic sealing part 4a.

[0081] It should be noted that this embodiment only defines the cooperation relationship between the structural plate 3 and the battery cell 2, and does not limit the specific number of the battery cells 2. The battery cell 2 and the structural plate 3 can be set one by one separately. The "structural plate 3" has a first side surface 3a in the first direction X. Since the ventilation groove 321 is formed on the first side surface 3a, and the first side surface 3a is arranged on the structural plate 3 facing the first direction X, based on this, the "peripheral end of the structural plate 3" refers to the side end of the structural plate 3 at the extended edge of the first side surface 3a, such as the side end in the second direction Y or the side end in the third direction Z.

[0082] The first direction X mentioned in this embodiment and the second direction Y and the third direction Z mentioned in the following embodiments belong to three mutually perpendicular directions; a ventilation groove 321 is formed on the first side surface 3a. The "ventilation groove 321" refers to a groove that can be used to introduce a heat exchange air flow. Therefore, the ventilation groove 321 should have a corresponding "extension direction", and two ports at both ends of this extension direction for intake and outlet respectively. Since this embodiment does not limit whether the extension direction of the channel groove is a straight line direction or a curved line direction, the two ports of the ventilation groove 321 can penetrate the same circumferential side end of the structural plate 3 at the same time (at this time, the extension path of the ventilation groove 321 can be set in a "U" shape), and the two ports of the ventilation groove 321 can also penetrate different circumferential side ends of the structural plate 3 (at this time, the ventilation groove 321 can extend linearly along the second direction Y or the third direction Z, and can even be gradually bent from the second direction Y to the third direction Z). This embodiment does not limit the relationship between the "extension direction" and the second and third directions, but the "extension direction" should at least be perpendicular to the first direction.

[0083] Regardless of how the ventilation groove 321 extends within the first side surface 3a, the ventilation groove 321 generally has two relatively arranged groove side walls. The relative direction of these two groove side walls is also the "direction perpendicular to the extension direction of the ventilation groove 321". For the ventilation groove 321 extending linearly, the "direction perpendicular to the extension direction" is determined. For example Figure 6 As shown in, the first side surface 3a is arranged towards the first direction X, and the ventilation groove 321 extends linearly along the second direction Y (the extension direction is the second direction Y), then the direction perpendicular to the extension direction can be determined as the third direction Z. For the ventilation groove 321 extending in a curved manner, the "direction perpendicular to the extension direction" changes along the extension path of the ventilation groove 321. For example, the extension path of the ventilation groove 321 is a quarter circle arc. At one of the ports of the ventilation groove 321, the "direction perpendicular to the extension direction" may be the second direction Y, and at the other port of the ventilation groove 321, the "direction perpendicular to the extension direction" may be the third direction Z.

[0084] The "multiple sealing parts 4" can be at least two, and of course can also be three or more. "The multiple sealing parts 4 are distributed on both sides of the ventilation groove 321 perpendicular to the extension direction" means that at least one of the multiple sealing parts 4 is distributed on one side of the ventilation groove 321 perpendicular to the extension direction, and at least one is also distributed on the other side of the ventilation groove 321 perpendicular to the extension direction; "the sealing part 4 is at least partially located between the first side surface 3a of the structural plate 3 and the battery cell 2" means that the sealing part 4 can be completely located between the first side surface 3a of the structural plate 3 and the battery cell 2, or there can be some structures outside the area corresponding to the first side surface 3a of the structural plate 3 and the battery cell 2. The part of the sealing part 4 located between the first side surface 3a of the structural plate 3 and the battery cell 2 can at least be hermetically connected to the first side surface 3a and the battery cell 2. The sealing part 4 can be fixed on the structural plate 3 and abut against the battery cell 2, or can also be in abutting contact with both the structural plate 3 and the battery cell 2. The purpose of such a definition is that the sealing part 4 can provide sealing for it on both sides of the ventilation groove 321 perpendicular to the extension direction, that is, to make the heat exchange air flow enter from only one port of the ventilation groove 321 and discharge from the other port as much as possible. Based on this, the sealing part 4 should at least provide sealing for it along the entire extension path of the ventilation groove 321. Therefore, the sealing part 4 should also have a corresponding sealing extension direction. This sealing extension direction can be similar to the extension direction of the ventilation groove 321 or may be completely different, but the sealing part 4 should at least extend from the peripheral end of the structural plate 3 where one port of the ventilation groove 321 is located to the peripheral end of the structural plate 3 where the other port is located.

[0085] Among the multiple sealing parts 4, at least one of them is set as the elastic sealing part 4a, or multiple of them can be set as the elastic sealing part 4a, or even all the sealing parts 4 can be set as the elastic sealing part 4a. However, it is worth mentioning that even if only one sealing part 4 is set as the elastic sealing part 4a, the existence of the elastic sealing part 4a should be recognized as contributing to improving the reliability of the battery cell 2; the "elastic sealing part 4a" refers to a component or structure made of an elastically deformable material. The elastic sealing part 4a can fill the gap between the first side surface 3a of the structural plate 3 and the battery cell 2 through its own elastic deformation characteristics, preventing the air flow inside the ventilation groove 321 from leaking out through positions other than its ports. There are various specific materials for the elastic sealing part 4a, such as rubber, silica gel, etc. The present embodiment does not limit the specific material of the elastic sealing part 4a.

[0086] In the technical solution provided by the present application, a ventilation groove 321 is formed on the first side 3a of the structural plate 3. When the structural plate 3 and the battery cell 2 are cooperated in the first direction X, the battery cell 2 can cover the notch of the ventilation groove 321. The two end ports of the ventilation groove 321 penetrate through the peripheral side end of the structural plate 3, one end port is used for air intake, and the other port is used for air outlet. The heat exchange air flow can directly contact and exchange heat with the battery cell 2 in the ventilation groove 321, thereby reducing or increasing the heat of the battery cell 2; on this basis, a plurality of sealing parts 4 are distributed on both sides of the ventilation groove 321 perpendicular to its extending direction, and are hermetically arranged between the structural plate 3 and the battery cell 2, so as to seal the ventilation groove 321 to prevent the heat exchange air flow from leaking from positions other than the two end ports of the ventilation groove 321, thereby ensuring the ventilation and heat exchange efficiency of the battery device 100; moreover, at least one of the plurality of sealing parts 4 is set as an elastic sealing part 4a. The elastic sealing part 4a can fill the gap between the first side 3a of the structural plate 3 and the battery cell 2 by using its own elastic deformation characteristics. It can not only compensate for the unevenness tolerance of the surface of the battery cell 2 (the requirements for the surface processing and the thickness dimension accuracy of the battery cell 2 are not high), but also reduce the pressure borne by the surface of the battery cell 2, that is, reduce the probability that the insulating blue film on the outer surface of the battery cell 2 is damaged. The risk of condensation failure of the battery cell 2 at the blue film pressing position is reduced, and the reliability of the battery cell 2 is improved.

[0087] Please refer to Figures 6 to 8 , in some embodiments, two elastic sealing parts 4a are provided, and the two elastic sealing parts 4a are distributed on both sides of the ventilation groove 321 perpendicular to the extending direction.

[0088] "Two elastic sealing parts 4a are provided", the plurality of sealing parts 4 may only include these two elastic sealing parts 4a, or may also include other types of sealing parts 4 in addition, and this embodiment does not limit this.

[0089] In the above technical solution, two elastic sealing parts 4a are provided, and the two elastic sealing parts 4a are distributed on both sides of the ventilation groove 321 perpendicular to the extending direction. By setting these two elastic sealing parts 4a, the ventilation groove 321 can be sealed, and the increase in the proportion of the number of elastic sealing parts 4a in the plurality of sealing parts 4 can further improve the reliability of the battery cell 2.

[0090] Please refer to Figure 9 , in some embodiments, the elastic sealing part 4a is injection molded on the structural plate 3.

[0091] "The elastic sealing portion 4a is injection-molded on the structural plate 3" means that, on the basis of the prior molding of the structural plate 3, the elastic sealing portion 4a is integrally formed on the structural plate 3 by means of secondary injection molding. This method allows the materials of the elastic sealing portion 4a and the structural plate 3 to be different. For example, the material of the structural plate 3 can be a hard material to ensure structural stability, while the material of the elastic sealing portion 4a can be a soft material to ensure its sealing performance.

[0092] In the above technical solution, the elastic sealing portion 4a is formed on the structural plate 3 by means of secondary injection molding, so that the elastic sealing portion 4a and the structural plate 3 are integrally arranged, which is convenient for the integrated transportation and integrated assembly of the elastic sealing portion 4a and the structural plate 3. Moreover, it can also eliminate the gap between the elastic sealing portion 4a and the structural plate 3, which is beneficial to further reducing the ventilation leakage amount of the ventilation groove 321.

[0093] In some embodiments, the elastic sealing portion 4a is provided as a sealing foam 53.

[0094] "The sealing foam 53" refers to the elastic sealing portion 4a made of a foaming material, which is mainly used to fill gaps and block the penetration of media such as liquids, gases, and dust, and at the same time has functions of buffering, shock absorption, and sound insulation.

[0095] In the above technical solution, setting the elastic sealing portion 4a as the sealing foam 53 can effectively prevent the heat exchange airflow in the ventilation groove 321 from leaking out through the elastic sealing portion 4a. At the same time, the sealing foam 53 can also use its own buffering performance to provide buffering for the structural plate 3 and the battery cell 2, preventing the two from being damaged due to hard contact.

[0096] In some embodiments, the sealing foam 53 is bonded to the structural plate 3.

[0097] It should be noted that one or both sides of some sealing foams 53 in contact with the interface may be provided with double-sided adhesives, and the sealing foam 53 can be efficiently bonded to the structural plate 3 through the double-sided adhesives. Of course, the sealing foam 53 can also be bonded to the structural plate 3 by applying a liquid sealant. This embodiment does not make any limitations in this regard.

[0098] In the above technical solution, bonding the sealing foam 53 to the structural plate 3 is not only beneficial to the integrated transportation and integrated assembly of the sealing foam 53 and the structural plate 3, but also can ensure the stability of the installation position of the sealing foam 53, preventing the sealing foam 53 from deviating in position during long-term use and resulting in sealing failure.

[0099] In some embodiments, the ventilation groove 321 extends along the second direction Y and penetrates through both side ends of the structural plate 3; the elastic sealing portion 4a is sleeved on the end of the battery cell 2 in the third direction Z; the first direction X, the second direction Y, and the third direction Z are perpendicular to each other pairwise.

[0100] It should be noted that since "the ventilation groove 321 extends along the second direction Y", the two ports of the ventilation groove 321 are respectively located at the two circumferential side ends of the structural plate 3 along the second direction Y. At this time, the extension direction of the ventilation groove 321 is also the second direction Y. "The elastic sealing portion 4a is sleeved on the end of the battery cell 2 in the third direction Z" means that the elastic sealing portion 4a belongs to a collar structure, such as an elastic sealing ring. Since the first direction X, the second direction Y, and the third direction Z are perpendicular to each other pairwise, after the elastic sealing portion 4a is sleeved on the end of the battery cell 2 in the third direction Z, at least part of the structure of the elastic sealing portion 4a should be in the first direction X, that is, between the battery cell 2 and the first side surface 3a of the structural plate 3, and this part of the structure also plays a sealing role.

[0101] In the above technical solution, the ventilation groove 321 extends along the second direction Y, and the elastic sealing portion 4a is sleeved on the end of the battery cell 2 in the third direction Z. A part of the elastic sealing portion 4a can abut against the first side surface 3a of the structural plate 3, thereby playing a role in sealing the ventilation groove 321 in the third direction Z. This solution of arranging the elastic sealing portion 4a based on the straight-line extension of the ventilation groove 321 utilizes the contraction force of the elastic sealing portion 4a to stably install it on the battery cell 2. Since the elastic sealing portion 4a is not fixedly connected to the battery cell 2 and the structural plate 3, it is easier to repair and replace the elastic sealing portion 4a later.

[0102] Please refer to Figures 6 to 8 , in some embodiments, the structural plate 3 has two first plate segments 31 distributed along the third direction Z and a second plate segment 32 located between the two first plate segments 31. The first side surface 3a is formed at the first plate segment 31 and the second plate segment 32; a plurality of sealing portions 4 are distributed on the two first plate segments 31, the ventilation groove 321 is formed in the second plate segment 32, and the ventilation groove 321 extends along the second direction Y and is provided through both side ends of the second plate segment 32; the first direction X, the second direction Y, and the third direction Z are perpendicular to each other pairwise.

[0103] In the above technical solution, the structural plate 3 is segmented along the third direction Z, and a plurality of sealing portions 4 are used to provide sealing for the two first plate segments 31 and the battery cell 2, and the ventilation groove 321 is arranged on the second plate segment 32. Since the ventilation groove 321 extends along the second direction Y on the second plate segment 32, the ventilation resistance suffered by the heat exchange air flow passing through the ventilation groove 321 is small, the heat exchange circulating air volume of the battery device 100 is large, and the heat exchange efficiency is high.

[0104] Please refer to Figure 5 , Figure 6 and Figure 8, in some embodiments, a plurality of battery cells 2 are arranged along the first direction X. The structural plate 3 is disposed between two adjacent battery cells 2 and has two first side surfaces 3a corresponding to the two battery cells 2 respectively. The ventilation groove 321 includes a first groove 321a and a second groove 321b. Both the first groove 321a and the second groove 321b correspond to the second plate segment 32 and are respectively formed on the two first side surfaces 3a. The first groove 321a and the second groove 321b are alternately arranged along the third direction Z. A plurality of sealing portions 4 are respectively arranged corresponding to the first groove 321a and the second groove 321b and are respectively disposed between the two first side surfaces 3a and the corresponding battery cells 2.

[0105] Since a plurality of battery cells 2 are arranged along the first direction X, "the structural plate 3 is disposed between two adjacent battery cells 2" means that the structural plate 3 can be disposed between any two adjacent battery cells 2. Since the structural plate 3 has two first side surfaces 3a, "both the first groove 321a and the second groove 321b correspond to the second plate segment 32 and are respectively formed on the two first side surfaces 3a" means that the first groove 321a is formed on one of the first side surfaces 3a and the second groove 321b is formed on the other first side surface 3a. Therefore, the first groove 321a and the second groove 321b can respectively be covered by two adjacent battery cells 2. "The first groove 321a and the second groove 321b are alternately arranged along the third direction Z" means that the first groove 321a and the second groove 321b are arranged in sequence along the third direction Z and there is no overlap in the projection along the first direction X. When a plurality of the first grooves 321a and the second grooves 321b are respectively provided, it can also be understood that, in the third direction Z, there is a second groove 321b between two adjacent first grooves 321a, and there is a first groove 321a between two adjacent second grooves 321b. "A plurality of sealing portions 4 are respectively arranged corresponding to the first groove 321a and the second groove 321b" means that the plurality of sealing portions 4 are divided into two groups, and the two groups of sealing portions 4 are respectively used to seal the first groove 321a and the second groove 321b on the two first side surfaces 3a.

[0106] In the above technical solution, the first groove 321a and the second groove 321b in the ventilation groove 321 both correspond to the second plate segment 32 and are respectively formed on two first side surfaces 3a, so that one structural plate 3 can take into account the ventilation and heat exchange of two adjacent battery cells 2, further improving the heat exchange efficiency of the battery device 100; moreover, the first groove 321a and the second groove 321b are alternately arranged along the third direction Z, so that there is a dislocation in the layout of the first groove 321a and the second groove 321b, and the thickness basis of the second plate segment 32 along the first direction X can be fully utilized respectively. On the premise of ensuring sufficient strength of the structural plate 3, the overall ventilation cross-sectional size of the first groove 321a and the second groove 321b remains a relatively large value, which is beneficial to ensuring the heat exchange circulating air volume.

[0107] Please refer to Figures 5 to 7 , in some embodiments, first limiting portions 33 are respectively connected to both ends of the first plate segment 31 in the second direction Y, and the two first limiting portions 33 clamp the battery cell 2; structural plates 3 are respectively arranged on both sides of the battery cell 2 along the first direction X, and the corresponding first limiting portions 33 in the two structural plates 3 are butted along the first direction X; wherein, the sealing portion 4 also extends to the corresponding first limiting portion 33, and the two sealing portions 4 corresponding along the first direction X are butted at the first limiting portion 33.

[0108] Since the "first limiting portion 33" is located at the side end of the first plate segment 31 in the second direction Y, the setting of the first limiting portion 33 does not hinder the heat exchange ventilation of the ventilation groove 321 on the second plate segment 32. "The two first limiting portions 33 clamp the battery cell 2" means that the projection of the first limiting portion 33 in the second direction Y coincides with at least part of the battery cell 2. Since a structural plate 3 is arranged on both sides of a battery cell 2 along the first direction X, the second plate segments 32 of the two structural plates 3 correspond in the first direction X, the first plate segments 31 also correspond in the first direction X, and the first limiting portions 33 arranged at both ends of the first plate segment 31 in the second direction Y should also correspond in the first direction X. Therefore, the corresponding first limiting portions 33 in the two structural plates 3 can be butted along the first direction X, that is, the two first plate segments 31 and the four first limiting portions 33 can form a clamping structure, so as to surround and arrange at the end of the battery cell 2 along the third direction Z; since the sealing portion 4 is arranged between the first plate segment 31 and the battery cell 2, and the first limiting portion 33 is arranged at the side end of the first plate segment 31 in the second direction Y, the sealing portion 4 and the first limiting portion 33 are associated through the first plate segment 31. In this embodiment, the sealing portion 4 is not only partially located between the first side surface 3a and the battery cell 2, but also partially extends between the first limiting portion 33 and the battery cell 2, and the two sealing portions 4 corresponding along the first direction X on the two structural plates 3 can also be butted at the butting position of the first limiting portion 33.

[0109] In the above technical solution, through the arrangement of the two first limiting portions 33, the battery cell 2 can be clamped and arranged in the second direction Y, thereby playing a role in restricting the displacement of the battery cell 2 in the second direction Y, ensuring the structural stability of the battery device 100. On this basis, the two corresponding sealing portions 4 on the two structural plates 3 also extend between the first limiting portion 33 and the battery cell 2 and are arranged in butt joint along the first direction X, which can play a role in restricting the heat exchange air flow from passing through the interface gap between the first limiting portion 33 and the battery cell 2, and ensuring the ventilation pressure in the ventilation groove 321.

[0110] Please refer to Figure 4 , in some embodiments, a plurality of battery cells 2 are arranged along the first direction X, and structural plates 3 are respectively arranged between two adjacent battery cells 2; at least one end of at least part of the structural plates 3 in the third direction Z is provided with a locking connection portion 35; the first direction X is perpendicular to the third direction Z.

[0111] "Structural plates 3 are respectively arranged between two adjacent battery cells 2" can be understood as that the structural plates 3 can be provided with structures such as ventilation grooves 321 and sealing portions 4 only for one adjacent battery cell 2, or can be provided with ventilation grooves 321 and sealing portions 4 for two adjacent battery cells 2 respectively. This embodiment does not make a limitation on this.

[0112] Since a plurality of battery cells 2 are arranged, then a plurality of structural plates 3 will also be arranged. "At least one end of at least part of the structural plates 3 in the third direction Z is provided with a locking connection portion 35" means that among the plurality of structural plates 3, only one structural plate 3 can be provided with a locking connection portion 35, or two or more structural plates 3 can be provided with locking connection portions 35.

[0113] In the battery device 100, in addition to the battery cells 2 and the structural plates 3, there are usually also structural members such as wiring harness plates, mica plates, and press strips. These structural members usually require stable installation points. The locking connection portion 35 in this embodiment can provide installation points for the installation of the above structural members; there are many structural types of the "locking connection portion 35". In some examples, the locking connection portion 35 includes an injection molding matrix made of the same material as the structural plate 3, and a nut is embedded in the injection molding matrix. The locking connection portion 35 is connected to a bolt on other structural members through the nut.

[0114] In the above technical solution, by arranging the locking connection portion 35 on the structural plate 3, the locking connection portion 35 can provide a stable installation point for other structural members of the battery device 100 when spanning multiple battery cells 2, which is beneficial to improving the structural stability inside the battery device 100.

[0115] Please refer to Figure 3 and Figure 4, in some embodiments, a pressure relief portion 21 is provided at one end of the battery cell 2 close to the locking connection portion 35; the battery device 100 further includes a smoke exhaust structure 5, the smoke exhaust structure 5 is disposed on the side where the pressure relief portion 21 of the battery cell 2 is located, the smoke exhaust structure 5 forms a smoke exhaust passage, and the inlet of the smoke exhaust passage is correspondingly provided for a plurality of pressure relief portions 21; the smoke exhaust structure 5 is locked and connected to the locking connection portion 35.

[0116] It should be noted that the "pressure relief portion 21" is usually provided on the end cover of the battery cell 2. When the pressure inside the battery cell 2 rises sharply due to abnormal working conditions (such as thermal runaway, overcharge, short circuit, etc.) and reaches the threshold value of the pressure relief portion 21, the pressure relief portion 21 can actively open and release the internal pressure of the battery cell 2, avoiding violent explosion or rupture of the battery cell 2. The pressure relief portion 21 will not be elaborated in this embodiment. For the pressure relief portion 21 of the battery cell 2, in the technical solution of this embodiment, a smoke exhaust structure 5 is provided. The smoke exhaust structure 5 forms a smoke exhaust passage, the inlet of the smoke exhaust passage is correspondingly provided for a plurality of pressure relief portions 21, and the outlet of the smoke exhaust passage communicates with the outside. When the pressure relief portion 21 is opened, the high-temperature and high-pressure flue gas ejected from the inside of the battery cell 2 can be discharged to the outside through the smoke exhaust passage in an orderly manner. The technical solution of this embodiment utilizes the locking connection portion 35 on the structural plate 3 to provide an installation basis for the smoke exhaust structure 5.

[0117] In the above technical solution, the battery device 100 further includes a smoke exhaust structure 5. The smoke exhaust structure 5 forms a smoke exhaust passage, the inlet of the smoke exhaust passage is correspondingly provided for a plurality of pressure relief portions 21, and the outlet of the smoke exhaust passage communicates with the outside. When the pressure relief portion 21 is opened, the high-temperature and high-pressure flue gas ejected from the inside of the battery cell 2 can be discharged to the outside through the smoke exhaust passage in an orderly manner. Moreover, by using the structural plate 3 to set the locking connection portion 35, the locking connection portion 35 can provide a stable installation point for the smoke exhaust structure 5 when crossing a plurality of battery cells 2, which is beneficial to ensuring the installation stability of the smoke exhaust structure 5.

[0118] In the embodiment as Figure 3 shown, the smoke exhaust structure 5 includes a flue gas cover plate 51, a wire harness plate 52 and a sealing foam 53 that are sequentially covered along the third direction Z. The smoke exhaust passage is disposed through the flue gas cover plate 51, the wire harness plate 52 and the sealing foam 53. The sealing foam 53 is aligned with the pressure relief portion 21 of the battery cell 2. The high-temperature and high-pressure flue gas discharged from the pressure relief portion 21 is discharged to the outside through the sealing foam 53, the wire harness plate 52 and the flue gas cover plate 51 in sequence. Among them, the flue gas cover plate 51 is locked and connected to the locking connection portion 35.

[0119] In some embodiments, a second limiting portion 34 is further provided at the other end of the structural plate 3 in the third direction Z. The second limiting portion 34 extends along the first direction X and abuts against the corresponding battery cell 2 in the third direction Z.

[0120] It should be noted that the locking connection part 35 is formed at one end of the structural plate 3 in the third direction Z. When the locking connection part 35 is locked and connected to other structural members, the locking connection part 35 usually needs to provide a tensile force in the third direction Z for other structural members. The "second limiting part 34" and the "locking connection part 35" are located at both ends of the structural plate 3 in the third direction Z.

[0121] In the above technical solution, a second limiting part 34 is further provided at the other end of the structural plate 3 in the third direction Z. Through the abutment of the second limiting part 34 against the battery cell 2, a stable limiting effect can be provided for the structural plate 3 to prevent the structural plate 3 from loosening or shifting between the battery cells 2 when the locking connection part 35 bears a tensile force away from the battery cell 2 in the third direction Z.

[0122] In order to ensure that the ventilation volume of the ventilation groove 321 meets the standard, the width dimension of the ventilation groove 321 is usually relatively large. Based on this, please refer to Figure 5 and Figure 8 , in some embodiments, a support part 322 is arranged in the ventilation groove 321, and the support part 322 abuts against the battery cell 2.

[0123] Generally speaking, in addition to having two groove side walls opposite to each other along the direction perpendicular to its extension direction, the ventilation groove 321 also has a groove bottom wall connecting the two groove side walls. The "support part 322" in this embodiment is arranged in the ventilation groove 321 and is arranged connecting the groove bottom wall of the ventilation groove 321. "The support part 322 abuts against the battery cell 2" means that the support part 322 protrudes along the first direction X and is flush with the first side surface 3a of the structural plate 3. The specific structure of the support part 322 is not limited in this embodiment, and the support part 322 can be a columnar structure or a strip structure.

[0124] In the above technical solution, a support part 322 is arranged in the ventilation groove 321, and the support part 322 is used to abut against the battery cell 2 to prevent the structural plate 3 from deforming under excessive pressure at the ventilation groove 321 after the assembly of the structural plate 3 and the battery cell 2, so as to play a role in ensuring the structural stability of the ventilation groove 321, and further ensure that the ventilation volume of the ventilation groove 321 meets the standard.

[0125] Please refer to Figure 6 and Figure 7 , in some embodiments, the support part 322 extends along the extension direction of the ventilation groove 321.

[0126] The statement that "the supporting part 322 extends along the extending direction of the ventilation groove 321" means that the extending path of the supporting part 322 is consistent with that of the ventilation groove 321. That is, when the ventilation groove 321 extends linearly along a determined direction, the supporting part 322 also extends linearly along this determined direction; when the ventilation groove 321 extends in an arc along an undetermined direction, the supporting part 322 also extends in an arc accordingly.

[0127] In the above technical solution, defining the supporting part 322 to extend along the extending direction of the ventilation groove 321 can provide stable support for the ventilation groove 321 at various positions in its extending direction, and the structural stability and reliability of the structural plate 3 are higher.

[0128] This application also proposes an electrical equipment, which includes a battery device 100 for providing electric energy. The specific structure of the battery device 100 refers to the above embodiments. Since this electrical equipment adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here. Among them, the battery device 100 is used to provide electric energy for the electrical equipment, and the electrical equipment includes, but is not limited to, new energy vehicles such as pure electric vehicles, hybrid vehicles and range-extended electric vehicles, and may also include aircraft such as electric drones and electric passenger aircraft.

[0129] The present application provides a battery device 100, which includes a plurality of battery cells 2 arranged along a first direction X. A structural plate 3 is provided between two adjacent battery cells 2. The structural plate 3 has two first plate segments 31 distributed along a third direction Z, and a second plate segment 32 located between the two first plate segments 31. Ventilation grooves 321 are respectively provided on both sides of the second plate segment 32 in the first direction X. Both ends of the ventilation grooves 321 penetrate through both side ends of the second plate segment 32 along a second direction Y. The corresponding battery cell 2 is covered at the notch of the ventilation groove 321 and is arranged in contact with the two first plate segments 31. The ventilation groove 321 includes a first groove 321a and a second groove 321b. The first groove 321a and the second groove 321b are alternately arranged along the third direction Z and respectively face the corresponding two battery cells 2. Support portions 322 are further provided in the first groove 321a and the second groove 321b. The support portions 322 abut against the corresponding battery cells 2 and extend along the second direction Y. Elastic sealing portions 4a are respectively provided between the two first plate segments 31 and the battery cells 2. First limiting portions 33 are respectively connected to both ends of the first plate segment 31 in the second direction Y. The two first limiting portions 33 clamp the corresponding battery cell 2. The corresponding first limiting portions 33 of two adjacent structural plates 3 are butted along the first direction X. The corresponding elastic sealing portions 4a of two adjacent structural plates 3 further extend to the limiting portions and are butted along the first direction X. At least part of one end of the structural plate 3 in the third direction Z is provided with a locking connection portion 35, and the other end is provided with a second limiting portion 34. The second limiting portion 34 extends along the first direction X and abuts against the corresponding battery cell 2 along the third direction Z. A pressure relief portion 21 is provided at one end of the battery cell 2 close to the locking connection portion 35. The battery device 100 further includes a smoke exhaust structure 5. The smoke exhaust structure 5 is provided on one side where the pressure relief portion 21 of the battery cell 2 is located. The smoke exhaust structure 5 forms a smoke exhaust channel. The inlet of the smoke exhaust channel corresponds to a plurality of pressure relief portions 21. The smoke exhaust structure 5 is locked and connected to the locking connection portion 35. Wherein, the elastic sealing portion 4a is integrally injection-molded on the structural plate 3; or the elastic sealing portion 4a includes a sealing foam 53, and the sealing foam 53 is bonded to the corresponding first plate segment 31; or the elastic sealing portion 4a is sleeved on the end of the battery cell 2 in the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that, Comprising: Battery cell; A structural plate having a first side surface in a first direction, with ventilation grooves formed on the first side surface. The two ports of the ventilation grooves at both ends in its extending direction penetrate through the peripheral ends of the structural plate, and the battery cell is covered at the notch of the ventilation groove; and, A plurality of sealing parts distributed on both sides of the ventilation groove perpendicular to the extending direction. At least part of the sealing parts are arranged between the first side surface of the structural plate and the battery cell, and at least one of the sealing parts is arranged as an elastic sealing part.

2. The battery device according to claim 1, wherein, Two elastic sealing parts are provided, and the two elastic sealing parts are distributed on both sides of the ventilation groove perpendicular to the extending direction.

3. The battery device according to claim 1, wherein The elastic sealing part is injection-molded on the structural plate.

4. The battery device according to claim 1, characterized in that, The elastic sealing part is arranged as a sealing foam.

5. The battery device according to claim 4, characterized in that, The sealing foam is bonded to the structural plate.

6. The battery device according to claim 1, characterized in that, The ventilation groove extends in a second direction and penetrates through the two peripheral ends of the structural plate; The elastic sealing part is sleeved on the end of the battery cell in a third direction; The first direction, the second direction, and the third direction are perpendicular to each other pairwise.

7. The battery device according to any one of claims 1 to 5, characterized in that, The structural plate has two first plate segments distributed in the third direction and a second plate segment between the two first plate segments. The first side surface is formed on the first plate segment and the second plate segment; A plurality of the sealing parts are distributed on the two first plate segments. The ventilation groove is formed on the second plate segment, and the ventilation groove extends in the second direction and penetrates through the two side ends of the second plate segment; The first direction, the second direction, and the third direction are perpendicular to each other pairwise.

8. The battery device according to claim 7, wherein A plurality of battery cells are arranged along the first direction. The structural plate is arranged between two adjacent battery cells and has two first side surfaces corresponding to the two battery cells respectively; The ventilation groove includes a first groove and a second groove. Both the first groove and the second groove correspond to the second plate segment and are respectively formed on the two first side surfaces, and the first groove and the second groove are alternately arranged along the third direction; A plurality of the sealing parts are respectively arranged corresponding to the first groove and the second groove and are respectively arranged between the two first side surfaces and the corresponding battery cells.

9. The battery device according to claim 7, characterized in that, First limiting parts are respectively connected to both ends of the first plate segment in the second direction, and the two first limiting parts clamp the battery cell; The structural plates are respectively arranged on both sides of the battery cell along the first direction, and the corresponding first limiting parts in the two structural plates are butted along the first direction; Wherein, the sealing part also extends to the corresponding first limiting part, and the two sealing parts corresponding to each other along the first direction are butted at the first limiting part.

10. The battery device according to any one of claims 1 to 6, characterized in that, A plurality of battery cells are arranged along the first direction. The structural plates are respectively arranged between two adjacent battery cells. At least part of one end of the structural plate in the third direction is provided with a locking connection part, and one end of the battery cell close to the locking connection part is provided with a pressure relief part; The battery device further includes a smoke exhaust structure, which is arranged on one side where the pressure relief part is located in the battery cell. The smoke exhaust structure is formed with a smoke exhaust passage, and the entrance of the smoke exhaust passage is correspondingly arranged for a plurality of the pressure relief parts; Wherein, the smoke exhaust structure is locked and connected to the locking connection part, and the first direction is perpendicular to the third direction.

11. The battery device according to any one of claims 1 to 6, characterized in that, A support part is arranged in the ventilation groove, and the support part extends along the extending direction of the ventilation groove, and the support part abuts against the battery cell.

12. An electrical device, characterized in that, It includes the battery device according to any one of claims 1 to 11.

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