Battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery device and a power utilization device.The battery device comprises a shell and a battery monomer assembly, the shell is provided with a containing space, the shell comprises two side walls which are oppositely arranged in the first direction, and the shell further comprises a bottom carrying plate which is arranged at the bottoms of the side walls and stretches out towards the containing space. The battery monomer assembly is arranged in the accommodating space and comprises a plurality of battery monomers which are stacked along a second direction, the battery monomer assembly is positioned between the two side walls along a first direction, the battery monomers are adhered to the side walls through structural adhesive, and the first direction is perpendicular to the second direction; the pocket bottom plate is positioned below the battery monomers, and is provided with a glue overflowing hole penetrating through the pocket bottom plate. The battery device provided by the utility model can improve the thermal management performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of batteries, in particular to a battery device and a power utilization device. BACKGROUND

[0002] The battery device generally comprises a plurality of battery cells arranged in a stack, the battery cells are accommodated in a housing, and the battery cells are generally bonded to the side walls of the housing by structural glue.

[0003] However, in the battery device using bottom water cooling, when the battery cells are bonded to the side walls, the structural glue will overflow to the lower side of the battery cells, the structural glue has poor thermal conductivity, which affects the heat dissipation effect of the battery cells through the liquid cooling plate and affects the thermal management performance. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the embodiments of the present application provide a battery device and a power utilization device to improve the thermal management performance.

[0005] In a first aspect, the embodiments of the present application provide a battery device, comprising a housing and a battery cell assembly, the housing has an accommodation space, and the housing comprises two side walls arranged oppositely along a first direction, and the housing further comprises a bottom pocket plate arranged at the bottom of the side wall and extending towards the accommodation space.

[0006] The battery cell assembly is arranged in the accommodation space and comprises a plurality of battery cells arranged in a stack along a second direction, along the first direction, the battery cell assembly is located between the two side walls, the battery cells are bonded to the side walls by structural glue, and the first direction is perpendicular to the second direction; the bottom pocket plate is located below the battery cells, and the bottom pocket plate is provided with a glue overflow hole penetrating the bottom pocket plate.

[0007] By adopting the above technical scheme, the battery device provided by the present application is provided with a bottom pocket plate at the bottom of the side wall of the housing, and the bottom pocket plate is provided with a glue overflow hole penetrating the bottom pocket plate, when the structural glue overflows, the structural glue can overflow into the glue overflow hole on the bottom pocket plate and can overflow from the glue overflow hole to the lower side of the bottom pocket plate, which is beneficial to avoid the structural glue overflowing to the lower side of the battery cells, thereby avoiding the influence of the structural glue on the heat dissipation of the battery cells to the lower side, and further avoiding the influence on the thermal management performance. In addition, in the absence of structural glue below the battery cells, it is convenient to paste an insulating film below the battery cells, which can be beneficial to avoid wrinkles of the insulating film, thereby improving the insulating effect of the insulating film.

[0008] In some embodiments, both sides of the battery cell along the first direction are first sides, both sides of the battery cell along the second direction are second sides, the connection between the first side and the second side is provided with a chamfer structure, the chamfer structures between adjacent two battery cells form a glue containing groove, and the glue overflow hole is in communication with the glue containing groove.

[0009] By adopting the technical scheme, when the structural adhesive overflows, the structural adhesive between the battery monomer and the side wall can first enter the glue containing groove, if the structural adhesive fills the glue containing groove, the structural adhesive will overflow into the glue overflow hole, which is beneficial to reduce the amount of structural adhesive overflowing into the glue overflow hole. And after the structural adhesive fills the glue overflow hole, it can overflow from the glue overflow hole to the lower side of the bottom plate, which is beneficial to avoid the structural adhesive overflowing to the lower side of the battery monomer, thereby being beneficial to avoid the structural adhesive affecting the heat dissipation of the battery monomer to the lower side, and further being beneficial to avoid affecting the thermal management performance.

[0010] In some embodiments, the size of the glue overflow hole in the second direction is greater than the size of the glue containing groove in the second direction;

[0011] And / or, the size of the glue overflow hole in the first direction is greater than the size of the glue containing groove in the first direction.

[0012] By adopting the technical scheme, the structural adhesive in the glue containing groove is easy to enter the glue overflow hole, so that the structural adhesive in the glue containing groove can smoothly enter the glue overflow hole, which is beneficial to avoid the structural adhesive entering the gap between the battery monomer and the bottom plate, thereby being beneficial to avoid the structural adhesive overflowing to the lower side of the battery monomer.

[0013] In some embodiments, the orthographic projection of the glue containing groove on the bottom plate is located in the orthographic projection of the glue overflow hole on the bottom plate.

[0014] By adopting the technical scheme, the structural adhesive in the glue containing groove can directly enter the glue overflow hole, which is beneficial to avoid the structural adhesive entering the gap between the battery monomer and the bottom plate, thereby being beneficial to avoid the structural adhesive overflowing to the lower side of the battery monomer.

[0015] In some embodiments, the glue overflow hole is multiple, and is arranged corresponding to the glue containing groove.

[0016] By adopting the technical scheme, compared with the case where the glue overflow hole is one, the total area of the orthographic projection of the glue overflow hole on the bottom plate can be reduced, which is beneficial to improve the structural strength of the bottom plate, thereby being beneficial to improve the structural strength of the side wall.

[0017] In some embodiments, the extension direction of the central axis of the glue overflow hole intersects the first direction and the second direction.

[0018] By adopting the technical scheme, the hole wall of the glue overflow hole is not easy to shield the structural adhesive, and the structural adhesive in the glue containing groove can smoothly enter the glue overflow hole.

[0019] In some embodiments, along the direction from the upper end of the glue overflow hole to the lower end of the glue overflow hole, the hole diameter of the glue overflow hole gradually increases.

[0020] In this way, the structural adhesive in the overflow hole is prone to be discharged from the lower end of the overflow hole, thereby facilitating the discharge of the structural adhesive in the overflow hole, and further facilitating the prevention of the structural adhesive from being blocked in the overflow hole.

[0021] In some embodiments, the overflow hole comprises an inlet and an outlet, the inlet is located at the upper end of the overflow hole, and the outlet is located at the lower end of the overflow hole, and at least part of the outlet is located on the side of the inlet away from the accommodation space.

[0022] By adopting the above technical solution, the overflow hole can make the structural adhesive overflowing from the outlet away from the accommodation space, thereby facilitating the prevention of the structural adhesive from overflowing to the lower side of the battery monomer, and further facilitating the prevention of the structural adhesive from affecting the heat dissipation of the battery monomer to the lower side, and further facilitating the prevention of the influence on the heat management performance.

[0023] In some embodiments, the distance between the central axis of the overflow hole and the inner side surface of the side wall is a first distance, and the first distance gradually decreases from the upper end to the lower end of the side wall.

[0024] By adopting the above technical solution, the overflow hole is inclined, which facilitates the smoothness of the structural adhesive overflowing from the inlet to the outlet, and facilitates the prevention of the structural adhesive from being blocked in the glue containing groove, thereby facilitating the prevention of the structural adhesive from entering the gap between the battery monomer and the bottom plate, and further facilitating the prevention of the structural adhesive from overflowing to the lower side of the battery monomer.

[0025] In some embodiments, the shell further comprises a baffle plate arranged below the bottom plate, the baffle plate is located on the side of the overflow hole away from the side wall, and is used to prevent the structural adhesive leaking from the overflow hole from flowing to the lower side of the battery monomer.

[0026] By adopting the above technical solution, the baffle plate can block the structural adhesive overflowing to the lower side of the bottom plate from flowing to the lower side of the battery monomer, and when a tool is used to scrape the structural adhesive below the bottom plate, the baffle plate can provide a limit for the tool, which can facilitate the prevention of the tool from scratching the battery monomer and the blue film on the battery monomer.

[0027] In some embodiments, the baffle plate is arranged at the end of the bottom plate away from the side wall.

[0028] By adopting the above technical solution, the baffle plate and the bottom plate can form a glue containing space for containing the structural adhesive, and the baffle plate arranged at the end of the bottom plate away from the side wall can increase the volume of the glue containing space, thereby facilitating the increase of the glue containing capacity, and further facilitating the prevention of the structural adhesive from overflowing to the lower side of the battery monomer from the lower side of the baffle plate.

[0029] In some embodiments, the lower surface of the bottom plate is provided with an overflow groove communicating with the overflow hole, the overflow groove is arranged on the side of the overflow hole away from the accommodation space, and penetrates through the outer side surface of the bottom plate.

[0030] In some embodiments, the pouch bottom plate is provided with a groove on the side facing the battery cell, the groove is located between two adjacent overflow holes in the second direction and communicates the two adjacent overflow holes.

[0031] By adopting the above technical solution, the groove can accommodate the structural adhesive, and when one overflow hole is filled with structural adhesive, the structural adhesive can enter the other adjacent overflow hole through the groove, which is conducive to the uniform distribution of the structural adhesive.

[0032] In a second aspect, the application provides a power consumption device, which comprises the battery device of any of the above embodiments.

[0033] The power consumption device provided by the application has the same or similar technical effects as the battery device of any of the above embodiments, which will not be described here.

[0034] The above description is only a summary of the technical solutions of the application. In order to make the technical means of the application more clear and understandable, the specific embodiments of the application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following will describe the specific embodiments of the application. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or conventional technical description. Obviously, the drawings in the following description are only some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0036] Figure 1 is a structural schematic diagram of a vehicle provided by some embodiments of the application;

[0037] Figure 2 is one of the exploded structural schematic diagrams of the battery device provided by some embodiments of the application;

[0038] Figure 3 is the second exploded structural schematic diagram of the battery device provided by some embodiments of the application;

[0039] Figure 4 is a three-dimensional structural schematic diagram of the battery device provided by some embodiments of the application, in which the side wall is not shown;

[0040] Figure 5 is one of the three-dimensional structural schematic diagrams of the side wall, the pouch bottom plate and the glue-blocking foam provided by some embodiments of the application;

[0041] Figure 6 is Figure 5 is a schematic diagram of the side wall provided with structural adhesive, in which the structural adhesive is not pressed open;

[0042] Figure 7 is a schematic view of a planar structure of Figure 6 ;

[0043] Figure 8 is a schematic view of a planar structure of Figure 7 ;

[0044] Figure 9 is a schematic view of a planar structure of Figure 7 ;

[0045] Figure 10 is a schematic view of a planar structure of ;

[0046] Figure 11 is a schematic view of a planar structure of ;

[0047] Figure 12 is a schematic view of a planar structure of Figure 11 ;

[0048] Figure 13 is a schematic view of a planar structure of ;

[0049] Figure 14 is a schematic view of a planar structure of Figure 13 ;

[0050] Figure 15 is a schematic view of a planar structure of Figure 13 ;

[0051] Figure 16 is a schematic view of a planar structure of Figure 13 ;

[0052] Figure 17 is a schematic view of a planar structure of Figure 13 ;

[0053] Figure 18 is a schematic view of a planar structure of Figure 13 ;

[0054] Figure 19 is a schematic view of a planar structure of Figure 18 ;

[0055] Figure 20 is a schematic view of a planar structure of Figure 13 ;

[0056] Figure 21 is a schematic view of a planar structure of ;

[0057] Figure 22 is along Figure 21 is a cross-sectional structure diagram along the line E-E in

[0058] The meanings of the marks in the figure are as follows:

[0059] Vehicle 1000; battery device 100; first box body 110; second box body 120; controller 200; motor 300;

[0060] Housing 10; accommodating space 101; side wall 11; inner side surface 111; top cover 12; end plate 13; pocket bottom plate 14; overflow hole 141; inlet 1411; outlet 1412; center axis 1401; groove 142; overflow groove 143; outer side surface 144; glue blocking foam 15; baffle 16; glue containing space 01;

[0061] Battery cell assembly 20; battery cell 21; first side surface 211; second side surface 212; chamfer structure 213; glue containing groove 201; current collecting component 22;

[0062] Structural adhesive 30; glue pressing area 301; first overflow glue area 302; second overflow glue area 303; insulating film 40; sampling assembly 50; isolation plate 51. DETAILED DESCRIPTION

[0063] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0065] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0066] 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 the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment in a manner known to those of ordinary skill in the art.

[0067] In the description of the embodiments of the present application, the term“and / or” is merely used to describe associated objects, and can represent the three conditions of three objects, for example, A and / or B can represent the three conditions of A alone, A and B, and B alone. In addition, the character“ / ” in the present application generally represents that the associated objects are in an“or” relationship.

[0068] In the description of the embodiments of the present application, the term“a plurality of” refers to two or more (including two), and similarly, “a plurality of groups” refers to two or more groups (including two groups), and “a plurality of pieces” refers to two or more pieces (including two pieces).

[0069] In the description of the embodiments of the present application, the technical terms“center”,“longitudinal”,“transverse”,“length”,“width”,“thickness”,“upper”,“lower”,“front”,“rear”,“vertical”,“horizontal”,“top”,“bottom”,“inner”,“outer” and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0070] In the description of the embodiments of the present application, unless otherwise specifically defined and limited, the technical terms“mounting”,“connecting”,“connecting”,“fixing” and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0071] If not specifically stated, all embodiments and optional embodiments of the present application can be combined to form new technical solutions.

[0072] If not specifically stated, all technical features and optional technical features of the present application can be combined to form new technical solutions.

[0073] The thermal management performance of a battery device cannot be ignored. The battery device generally comprises a shell and a plurality of battery cells arranged in the shell. During use of the battery device, the temperature of the battery cells will rise. In a battery device using bottom water cooling, a liquid cooling plate can dissipate heat from the battery cells to ensure the thermal management performance of the battery cells.

[0074] The battery cells are accommodated in the shell. The battery cells are generally bonded to the side wall of the shell by structural adhesive. When the battery cells are bonded to the side wall, the structural adhesive will overflow to the lower side of the battery cells. The thermal conductivity of the structural adhesive is poor, which will reduce the rate of heat transfer from the battery cells to the liquid cooling plate, resulting in that the battery cells cannot be cooled in time, thereby affecting the thermal management performance.

[0075] Therefore, the embodiments of the present application provide a battery device, which comprises a shell and a battery cell assembly. The shell has an accommodation space, and comprises two side walls arranged opposite along a first direction. The shell further comprises a bottom plate arranged at the bottom of the side wall and extending towards the accommodation space.

[0076] The battery cell assembly is arranged in the accommodation space and comprises a plurality of battery cells stacked along a second direction. Along the first direction, the battery cell assembly is located between the two side walls. The battery cells are bonded to the side wall by structural adhesive. The first direction is perpendicular to the second direction. The bottom plate is located below the battery cells. The bottom plate is provided with an overflow hole penetrating the bottom plate.

[0077] By adopting the above technical solution, the battery device provided by the embodiments of the present application is provided with a bottom plate at the bottom of the side wall of the shell, and the bottom plate is provided with an overflow hole penetrating the bottom plate. When the structural adhesive overflows, the structural adhesive can overflow into the overflow hole on the bottom plate and then overflow below the bottom plate from the overflow hole, which is beneficial to avoid the structural adhesive overflowing to the lower side of the battery cells, thereby avoiding the influence of the structural adhesive on the heat dissipation of the battery cells downward, and further avoiding the influence on the thermal management performance. In addition, in the absence of structural adhesive below the battery cells, it is convenient to paste an insulating film below the battery cells, which can be beneficial to avoid wrinkles of the insulating film, thereby improving the insulation effect of the insulating film.

[0078] The technical solutions described in the embodiments of the present application are applicable to battery devices, energy storage devices using battery devices and electric devices using battery devices.

[0079] In the embodiments of the present application, the battery cells can be secondary batteries, which refer to battery cells that can be activated by charging after discharging.

[0080] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited thereto.

[0081] The battery device disclosed in the embodiments of the present application can be used in a power consumption device using the battery device as a power source or a variety of energy storage systems using the battery device as an energy storage element. The power consumption device can be, for example, a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric toy, an electric tool, a vehicle, a ship, and a spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0082] The energy storage device provided in the embodiments of the present application includes one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster can include a plurality of battery devices connected in series through a busbar component to improve the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0083] The energy storage device can be used in an energy storage power station, a wind power generation system, a solar power generation system, a mobile power system, or a temporary power supply system, etc. The energy storage device can store electrical energy as needed and output the electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during a low power consumption period, and provide electrical energy for related users or power consumption devices during a high power consumption period. The energy storage system provided in the embodiments of the present application can be any power system that needs to use an energy storage device.

[0084] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0085] In some embodiments, the energy storage device can include a cabinet body and one or more battery clusters, and the battery clusters are accommodated in the cabinet body.

[0086] The following embodiments are described for convenience of illustration, taking a vehicle as an example of a power consumption device in an embodiment of the present application.

[0087] Please refer to Figure 1 , Figure 1A structural schematic diagram of a vehicle 1000 is provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle, which can be a pure electric vehicle, a hybrid vehicle, or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery apparatus 100, which can be arranged at the bottom, head, or tail of the vehicle 1000. The battery apparatus 100 can be used for power supply of the vehicle 1000, for example, the battery apparatus 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery apparatus 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation, and driving.

[0088] In some embodiments of the present application, the battery apparatus 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0089] In some embodiments, the battery apparatus 100 refers to an energy storage device, which includes a box body, and at least one side of the box body is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0090] Please refer to Figure 2 and Figure 3 , Figure 2 is one of the exploded structural schematic diagrams of the battery apparatus 100 provided in some embodiments of the present application, Figure 3 is another exploded structural schematic diagram of the battery apparatus 100 provided in some embodiments of the present application. The battery apparatus 100 (Battery Apparatus) mentioned in the embodiments of the present application can include one or more battery cell assemblies 20 for providing voltage and capacity. The battery cell assembly 20 (Battery Cell Assembly) can include a plurality of battery cells 21, and the plurality of battery cells 21 are connected in series, parallel, or mixed connection through a busbar component 22.

[0091] In some embodiments, the plurality of battery cells 21 in the battery apparatus 100 can be electrically connected through the busbar component 22 to realize parallel, series, or mixed connection of the plurality of battery cells 21 in the battery apparatus 100.

[0092] In some embodiments, the battery cell assembly 20 is usually formed by arranging a plurality of battery cells 21; as an example, the battery cell assembly 20 can be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells 21 to form an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 21 with a cable tie.

[0093] In some embodiments, the battery device 100 can be a battery pack, which includes a box and one or more battery cell assemblies 20 accommodated in the box.

[0094] Please refer to Figure 2 As an example, the battery cell assembly 20 can also be accommodated in the box by directly fixing a plurality of battery cells 21 to the box.

[0095] As an example, the battery cell assembly 20 can be a battery module, which can be accommodated in the box by fixing the battery module to the box. The battery module can include a housing 10 having an accommodation space 101, and the battery cell assembly 20 is accommodated in the accommodation space 101 of the housing 10.

[0096] As an example, the box can include a first box 110 (e.g., a lower box) and a second box 120 (e.g., an upper box). The first box 110 and the second box 120 are fastened so that the inside of the box forms a closed space to accommodate the battery cell assembly 20. Here, closed means covered or closed, which can be sealed or unsealed.

[0097] As an example, the box can include a cover plate, a side plate, and a bottom plate. The cover plate and the bottom plate are respectively connected with the side plate, so that the inside of the box forms a closed space to accommodate the battery cell assembly 20.

[0098] As an example, the box can include two first side plates oppositely arranged along a first direction X and two second side plates oppositely arranged along a second direction Y. The first direction X intersects the second direction Y, for example, the first direction X is perpendicular to the second direction Y.

[0099] As an example, the box can be part of the chassis structure of the vehicle 1000. For example, the cover plate of the box can be at least part of the floor of the vehicle 1000, or the side plate of the box can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0100] Please refer to Figure 4 and in combination with Figure 3 , Figure 4 is a second exploded structural schematic diagram of the battery device 100 provided by some embodiments of the present application, and a perspective structural schematic diagram of the battery device 100 provided by some embodiments of the present application, in which the side wall 11 is not shown.

[0101] In some embodiments, the battery device 100 provided by the embodiments of the present application further comprises a sampling assembly 50, which is located in the accommodation space 101 and above the battery monomer assembly 20. The sampling assembly 50 comprises an isolation plate 51, and the busbar component 22 can be connected to the isolation plate 51. The shell 10 comprises a top cover 12 and a side wall 11, which are connected and form the accommodation space 101. The sampling assembly 50 can be located below the top cover 12.

[0102] In some embodiments, the battery device 100 provided by the embodiments of the present application further comprises an insulating film 40, which can be located below the battery monomer assembly 20. The insulating film 40 is attached to the bottom of the battery monomer 21. The insulating film 40 can be beneficial to improve the insulation of the battery monomer 21, avoid the leakage of the battery monomer 21, and thus improve the safety of the battery monomer 21.

[0103] In some embodiments, at least part of the outer surface of the battery monomer 21 is wrapped with a blue film. The blue film has an insulating effect, which can be beneficial to avoid the leakage of the battery monomer 21, and thus improve the safety of the battery monomer 21.

[0104] Please refer to Figure 5 and Figure 6 , and combine Figure 3 and Figure 4 , Figure 5 is one of the schematic diagrams of the side wall 11, the pocket bottom plate 14 and the glue-blocking foam 15 provided by some embodiments of the present application, Figure 6 is Figure 5 a schematic diagram of the structure glue 30 provided on the side wall 11. In some embodiments, the battery monomer assembly 20 is located between the two side walls 11 along the first direction X. The structure glue 30 is provided between the side wall 11 of the shell 10 and the battery monomer 21. The structure glue 30 can be attached between the battery monomer 21 and the side wall 11, which can improve the stability of the battery monomer 21.

[0105] For example, the two side surfaces of the battery monomer 21 in the first direction X are attached to the side wall 11 of the shell 10 by the structure glue 30. The two side surfaces of the battery monomer 21 in the first direction X are both the first side surface 211.

[0106] In some embodiments, the battery monomer assembly 20 has a large size along the second direction Y and the side wall 11 has a large thickness. For example, the size of the battery monomer assembly 20 along the second direction Y is greater than 1 m, and the thickness of the side wall 11 along the first direction X is greater than 3 mm. This results in that the compression of the side wall 11 is difficult when the battery device 100 is assembled. The gap between the side wall 11 and the battery monomer assembly 20 is large. Even if the compression force of the side wall 11 is increased, it is still difficult to achieve the compression state of the conventional thin side wall 11.

[0107] In order to fill the gap between the side wall 11 and the battery cell assembly 20, the amount of structural adhesive 30 needs to be increased, which results in the problem of structural adhesive 30 easily overflowing. The shell 10 further comprises a glue-blocking foam 15 and a bottom-holding plate 14. The glue-blocking foam 15 is arranged on the side of the side wall 11 facing the accommodation space 101 and close to the upper end of the side wall 11. The bottom-holding plate 14 is arranged at the bottom of the side wall 11 and extends towards the accommodation space 101. In this way, the glue-blocking foam 15 and the bottom-holding plate 14 can at least to some extent block the structural adhesive 30 from overflowing, thereby helping to solve the problem of overflow.

[0108] Please refer to Figure 7 , Figure 8 and Figure 9 , Figure 7 is a plan view of Figure 6 , Figure 8 is a partial enlarged view of A in Figure 7 , Figure 9 is a structural view of the structural adhesive 30 being pressed open on the side wall 11 in Figure 7 . It can be understood that before the battery cell assembly 20 is assembled with the shell 10, the side wall 11 of the shell 10 is coated with a plurality of structural adhesives 30, for example, four structural adhesives 30. Of course, the number of structural adhesives 30 can be adjusted according to the height of the battery cell 21 (the size of the battery cell 21 in the third direction Z). When the battery cell assembly 20 is assembled with the shell 10, the structural adhesive 30 is pressed open and adheres to the battery cell 21.

[0109] Optionally, the structural adhesive 30 extends along the second direction Y, and a plurality of structural adhesives 30 are arranged at intervals along the third direction Z, the third direction Z intersects the first direction X and the second direction Y, for example, the third direction Z is perpendicular to the first direction X and the second direction Y.

[0110] As an example, please refer to Figure 7 , the total width of the plurality of structural adhesives 30 is L, that is, the distance between the upper edge of the uppermost structural adhesive 30 and the lower edge of the lowermost structural adhesive 30 in the third direction Z is L.

[0111] As an example, please refer to Figure 8 , the width of a single structural adhesive 30 is a, that is, the distance between the two edges of a single structural adhesive 30 in the third direction Z is a. Wherein, the value of a can be determined according to the glue output of the glue coating equipment.

[0112] As an example, please continue to refer to Figure 8 , the center distance between two adjacent structural adhesives 30 is b, that is, the distance between the center of one of the two adjacent structural adhesives 30 and the center of the other structural adhesive 30 in the third direction Z is b.

[0113] Optionally, 10mm≤b≤15mm, which can help to avoid too small value of b, thus helping to avoid serious overflow problem, and can help to avoid too large value of b, thus helping to make the area of the structural adhesive 30 after being pressed meet the requirements.

[0114] Optionally, referring to Figure 9 , the structural adhesive 30 can be pressed to form a pressed adhesive area 301, a first overflow adhesive area 302 and a second overflow adhesive area 303, the structural adhesive 30 of the pressed adhesive area 301 can be bonded with the battery monomer 21, the structural adhesive 30 of the first overflow adhesive area 302 can be blocked by the adhesive blocking foam 15, and the structural adhesive 30 of the second overflow adhesive area 303 can be blocked by the bottom plate 14, thus helping to avoid the structural adhesive 30 overflowing outward, and further helping to solve the overflow problem.

[0115] When the pressing force of the side wall 11 is too large or the pressing force fluctuates greatly, the structural adhesive 30 can overflow from the bottom plate 14 to the lower side of the battery monomer 21, after the structural adhesive 30 overflows to the lower side of the battery monomer 21, the heat conduction performance of the structural adhesive 30 is poor, and the structural adhesive 30 will reduce the heat transfer rate of the battery monomer 21 to the lower liquid cooling plate (not shown in the figure), causing the battery monomer 21 to be unable to dissipate heat in time, thus affecting the heat management performance, and causing the heat management performance of the battery device 100 to be poor.

[0116] Optionally, referring to Figure 10 , and combining Figures 3 to 9 , Figure 10 is a second perspective structural diagram of the side wall 11, the bottom plate 14 and the adhesive blocking foam 15 provided by some embodiments of the present application. The embodiments of the present application provide a battery device 100, the battery device 100 comprises a shell 10 and a battery monomer assembly 20, the shell 10 has a containing space 101, and the shell 10 comprises two side walls 11 arranged oppositely along a first direction X, and the shell 10 further comprises a bottom plate 14, the bottom plate 14 is arranged at the bottom of the side wall 11, and the bottom plate 14 extends towards the containing space 101.

[0117] The battery monomer assembly 20 is arranged in the containing space 101, and the battery monomer assembly 20 comprises a plurality of battery monomers 21 arranged in a stacking manner along a second direction Y, the battery monomer assembly 20 is located between the two side walls 11 along the first direction X, and the battery monomer 21 is bonded with the side wall 11 through the structural adhesive 30, which can improve the connection stability of the battery monomer assembly 20.

[0118] The bottom plate 14 is located below the battery monomer 21, and the bottom plate 14 is provided with an overflow hole 141 penetrating through the bottom plate 14, and the extension direction of the center axis 1401 of the overflow hole 141 intersects the first direction X and the second direction Y. Among them, the first direction X intersects the second direction Y, for example, the first direction X is perpendicular to the second direction Y.

[0119] Optionally, the side wall 11 is integrally formed with the pocket bottom plate 14, which facilitates manufacturing of the side wall 11 and the pocket bottom plate 14.

[0120] As an example, the extending direction of the center axis 1401 of the glue overflow hole 141 is perpendicular to the first direction X and the second direction Y.

[0121] It can be understood that the battery device 100 provided by the embodiments of the present application is provided with the pocket bottom plate 14 at the bottom of the side wall 11 of the shell 10, and the pocket bottom plate 14 is provided with the glue overflow hole 141 penetrating through the pocket bottom plate 14. When the structural glue 30 overflows, the structural glue 30 can overflow into the glue overflow hole 141 on the pocket bottom plate 14, and can overflow from the glue overflow hole 141 to the lower side of the pocket bottom plate 14, which is beneficial to avoid the structural glue 30 overflowing between the lower side of the battery monomer 21 and the liquid cooling plate at the bottom of the battery monomer 21, thereby being beneficial to avoid the structural glue 30 affecting the heat dissipation of the battery monomer 21 to the lower side, and further being beneficial to avoid affecting the heat management performance.

[0122] In addition, in the case that there is no structural glue 30 under the battery monomer 21, the insulating film 40 can be pasted under the battery monomer 21, which can be beneficial to avoid the insulating film 40 being wrinkled, thereby improving the insulation effect of the insulating film 40.

[0123] Please refer to Figure 3 The liquid cooling plate is arranged below the battery monomer assembly 20, and the heat-conducting glue is arranged between the liquid cooling plate and the battery monomer 21, and the heat-conducting coefficient of the heat-conducting glue is greater than the heat-conducting coefficient of the structural glue 30.

[0124] The liquid cooling plate is arranged below the insulating film 40, and the heat-conducting glue can be arranged between the liquid cooling plate and the insulating film 40.

[0125] By adopting the above technical solutions, the battery device 100 provided by the embodiments of the present application can utilize the heat-conducting glue to transmit the heat of the battery monomer 21 to the liquid cooling plate, and the liquid cooling plate can be provided with a channel through which a condensate flows, thereby being beneficial to heat dissipation of the battery monomer 21. As an example, the condensate can be circulating water or other condensing medium.

[0126] In addition, the glue overflow hole 141 can be beneficial to avoid the structural glue 30 overflowing to the lower side of the battery monomer 21, thereby being beneficial to avoid the structural glue 30 affecting the heat dissipation of the heat-conducting glue, and further being beneficial to improve the heat management performance.

[0127] Please refer to Figure 11 and Figure 12 , Figure 11 is a bottom structure schematic diagram of the battery device 100 provided by some embodiments of the present application, Figure 12 is Figure 11A local enlarged view at B. In some embodiments, the two sides of the battery cell 21 along the first direction X are both the first side 211, the two sides of the battery cell 21 along the second direction Y are both the second side 212, and the connection between the first side 211 and the second side 212 is provided with a chamfer structure 213. The chamfer structure 213 between the adjacent two battery cells 21 forms a glue containing groove 201, and the glue overflow hole 141 is in communication with the glue containing groove 201.

[0128] By adopting the above technical solution, when the structural adhesive 30 is pressed to overflow, the structural adhesive 30 between the battery cell 21 and the side wall 11 can first enter the glue containing groove 201. After the glue containing groove 201 is filled with the structural adhesive 30, the structural adhesive 30 will overflow into the glue overflow hole 141. In this way, when the structural adhesive 30 is pressed to overflow, part of the structural adhesive 30 will overflow into the glue containing groove 201, and the other structural adhesive 30 will overflow through the glue overflow hole 141, thereby facilitating the reduction of the amount of structural adhesive 30 overflowing into the glue overflow hole 141, and further preventing the structural adhesive 30 from easily filling the glue overflow hole 141.

[0129] In addition, if the structural adhesive 30 fills the glue overflow hole 141, the structural adhesive 30 can overflow from the glue overflow hole 141 to the lower side of the bottom plate 14, thereby facilitating the prevention of the structural adhesive 30 from overflowing to the lower side of the battery cell 21, and further facilitating the prevention of the structural adhesive 30 from affecting the heat dissipation of the battery cell 21 to the lower side, and further facilitating the prevention of the influence on the heat management performance.

[0130] In some embodiments, the size of the glue overflow hole 141 in the second direction Y is greater than the size of the glue containing groove 201 in the second direction Y, and the size of the glue overflow hole 141 in the first direction X is less than or equal to the size of the glue containing groove 201 in the first direction X.

[0131] In this way, after the glue containing groove 201 is filled with the structural adhesive 30, the structural adhesive 30 in the glue containing groove 201 is easy to enter the glue overflow hole 141 along the second direction Y, thereby enabling the structural adhesive 30 in the glue containing groove 201 to smoothly enter the glue overflow hole 141, and further facilitating the prevention of the structural adhesive 30 from entering the gap between the battery cell 21 and the bottom plate 14, and further facilitating the prevention of the structural adhesive 30 from overflowing to the lower side of the battery cell 21.

[0132] In other embodiments, the size of the glue overflow hole 141 in the first direction X is greater than the size of the glue containing groove 201 in the first direction X, and the size of the glue overflow hole 141 in the second direction Y is less than or equal to the size of the glue containing groove 201 in the second direction Y.

[0133] In this way, after the structural adhesive 30 fills the glue containing groove 201, the structural adhesive 30 in the glue containing groove 201 can easily enter the glue overflow hole 141 along the first direction X, so that the structural adhesive 30 in the glue containing groove 201 can smoothly enter the glue overflow hole 141, which is beneficial to avoid the structural adhesive 30 entering the gap between the battery monomer 21 and the bottom plate 14, thereby facilitating the structural adhesive 30 to overflow to the lower side of the battery monomer 21.

[0134] In some embodiments, the size of the glue overflow hole 141 in the first direction X is greater than the size of the glue containing groove 201 in the first direction X, and the size of the glue overflow hole 141 in the second direction Y is greater than the size of the glue containing groove 201 in the second direction Y.

[0135] In this way, after the structural adhesive 30 fills the glue containing groove 201, the structural adhesive 30 in the glue containing groove 201 can easily enter the glue overflow hole 141 along the first direction X and the second direction Y, so that the structural adhesive 30 in the glue containing groove 201 can smoothly enter the glue overflow hole 141, which is beneficial to avoid the structural adhesive 30 entering the gap between the battery monomer 21 and the bottom plate 14, thereby facilitating the structural adhesive 30 to overflow to the lower side of the battery monomer 21.

[0136] Please continue to refer to Figure 11 and Figure 12 In some embodiments, the orthographic projection of the glue containing groove 201 on the bottom plate 14 is located in the orthographic projection of the glue overflow hole 141 on the bottom plate 14. That is, the orthographic projection area of the glue containing groove 201 in the direction perpendicular to the bottom plate 14 is less than the orthographic projection area of the glue overflow hole 141 in the direction perpendicular to the bottom plate 14, and the orthographic projection contour of the glue overflow hole 141 in the direction perpendicular to the bottom plate 14 surrounds the orthographic projection of the glue containing groove 201 in the direction perpendicular to the bottom plate 14.

[0137] By adopting the above technical scheme, after the structural adhesive 30 fills the glue containing groove 201, the structural adhesive 30 in the glue containing groove 201 can directly enter the glue overflow hole 141, which is beneficial to avoid the structural adhesive 30 entering the gap between the battery monomer 21 and the bottom plate 14, thereby facilitating the structural adhesive 30 to overflow to the lower side of the battery monomer 21.

[0138] In some embodiments, the glue overflow hole 141 is a plurality of glue overflow holes, and is arranged corresponding to the glue containing groove 201. That is, the plurality of glue overflow holes 141 correspond one-to-one to the plurality of glue containing grooves 201.

[0139] In this way, each glue containing groove 201 is in communication with the glue overflow hole 141, and after the structural adhesive 30 fills the glue containing groove 201, the structural adhesive 30 in each glue containing groove 201 can enter the corresponding glue overflow hole 141.

[0140] Furthermore, given that each glue-containing groove 201 is connected to the glue overflow hole 141, compared to the case where the glue overflow hole 141 is a narrow through hole extending along the second direction Y, setting the glue overflow hole 141 as multiple holes can reduce the total area of ​​the glue overflow hole 141 projected onto the bottom plate 14, which is beneficial to improving the structural strength of the bottom plate 14, thereby improving the structural strength of the side wall 11.

[0141] Please see Figure 13 and Figure 14 , Figure 13 This is a side view schematic diagram of the side wall 11, bottom plate 14, and adhesive-blocking foam 15 provided in some embodiments of this application. Figure 14 yes Figure 13 One of the enlarged views at point C. In some embodiments, the extension direction of the central axis 1401 of the overflow hole 141 intersects the first direction X and the second direction Y. Optionally, the extension direction of the central axis 1401 of the overflow hole 141 is perpendicular to the first direction X and the second direction Y. For example, the extension direction of the central axis 1401 of the overflow hole 141 can be vertical. In this way, the structural adhesive 30 in the overflow hole 141 can overflow vertically to the lower end of the overflow hole 141, the hole wall of the overflow hole 141 is less likely to block the structural adhesive 30, the structural adhesive 30 can easily overflow downward along the hole wall of the overflow hole 141, and the structural adhesive 30 in the adhesive receiving tank 201 can smoothly enter the overflow hole 141.

[0142] Please see Figure 15 and Figure 16 , Figure 15 yes Figure 13 The second magnified view of a section at point C. Figure 16 yes Figure 13 The third enlarged view at point C. In some embodiments, the diameter of the overflow hole 141 gradually increases along the direction from the upper end to the lower end of the overflow hole 141.

[0143] During the downward overflow of structural adhesive 30 from overflow hole 141, as the diameter of overflow hole 141 increases, the structural adhesive 30 can release pressure, allowing the upper structural adhesive 30 to overflow more easily downwards. This facilitates the discharge of structural adhesive 30 from the lower end of overflow hole 141, thus preventing blockage of the overflow hole 141.

[0144] For example, please refer to Figure 14 The overflow hole 141 can be a conical hole, and the hole wall surface of the overflow hole 141 is a conical surface. The extension direction of the central axis 1401 of the overflow hole 141 is perpendicular to the first direction X and the second direction Y.

[0145] For example, please refer toFigure 16 , and in combination Figure 3 , part of the hole wall surface of the overflow hole 141 is a cylindrical surface, and another part of the hole wall surface of the overflow hole 141 is a conical surface, wherein the cylindrical surface is located on the side of the conical surface away from the accommodation space 101.

[0146] Please refer to Figure 17 and Figure 18 , and in combination Figure 3 and Figure 16 , Figure 17 is Figure 13 , a fourth partial enlarged view of C in Figure 18 , a fifth partial enlarged view of C in Figure 13 . In some embodiments, the overflow hole 141 includes an inlet 1411 and an outlet 1412, the inlet 1411 is located at the upper end of the overflow hole 141, and the outlet 1412 is located at the lower end of the overflow hole 141, and at least part of the outlet 1412 is located on the side of the inlet 1411 away from the accommodation space 101.

[0147] By adopting the above technical solution, the overflow hole 141 can make the structural adhesive 30 overflowing from the outlet 1412 away from the accommodation space 101, which is beneficial to avoid the structural adhesive 30 overflowing to the lower side of the battery monomer 21, thereby being beneficial to avoid the structural adhesive 30 affecting the heat dissipation of the battery monomer 21 to the lower side, and further being beneficial to avoid affecting the heat management performance.

[0148] As an example, please refer to Figure 16 , and in combination Figure 3 , the opening area of the outlet 1412 is greater than the opening area of the inlet 1411, and part of the outlet 1412 is located on the side of the inlet 1411 away from the accommodation space 101.

[0149] Optionally, please refer to Figure 17 , the distance between the center axis 1401 of the overflow hole 141 and the surface of the side wall 11 facing the accommodation space 101 is a first distance, and the first distance gradually decreases from the upper end to the lower end of the side wall 11. It should be noted that the surface of the side wall 11 facing the accommodation space 101 is the inner side surface 111 of the side wall 11.

[0150] That is, the overflow hole 141 is inclined, and the lower end of the overflow hole 141 is inclined in the direction away from the accommodation space 101, and the hole wall surface of the overflow hole 141 continuously extends along the extension direction of the center axis 1401 of the overflow hole 141, which is beneficial to improve the smoothness of the structural adhesive 30 overflowing from the inlet 1411 to the outlet 1412, and the outlet 1412 of the lower end of the overflow hole 141 is inclined in the direction away from the accommodation space 101, which can make the structural adhesive 30 away from the accommodation space 101, and is beneficial to avoid the structural adhesive 30 overflowing to the lower side of the battery monomer 21.

[0151] As an example, please refer toFigure 17 The overflow hole 141 is an inclined hole, and the lower end of the overflow hole 141 is inclined away from the accommodation space 101, and the outlet 1412 is located on the side of the inlet 1411 away from the accommodation space 101.

[0152] As an example, please refer to Figure 19 and in combination with Figure 18 , Figure 19 is Figure 18 D view in FIG. 1, the overflow hole 141 is an inclined hole, and the lower end of the overflow hole 141 is inclined away from the accommodation space 101, and the outlet 1412 is located on the side of the inlet 1411 away from the accommodation space 101.

[0153] Please refer to Figure 3 and Figures 14 to 18 In some embodiments, the shell 10 further comprises a baffle plate 16 arranged below the pocket bottom plate 14, the baffle plate 16 is located on the side of the overflow hole 141 away from the side wall 11, and the baffle plate 16 is used to prevent the structural adhesive 30 flowing out of the overflow hole 141 from flowing to the lower side of the battery monomer 21, that is, the baffle plate 16 is located on the side of the overflow hole 141 towards the accommodation space 101.

[0154] Optionally, the baffle plate 16 is integrally formed with the pocket bottom plate 14, so as to facilitate the manufacturing of the baffle plate 16 and the pocket bottom plate 14.

[0155] It can be understood that the baffle plate 16 can block the structural adhesive 30 overflowing to the lower side of the pocket bottom plate 14 from flowing to the lower side of the battery monomer 21, and when using a tool to scrape the structural adhesive 30 below the pocket bottom plate 14, the baffle plate 16 can provide a limit for the tool, which can be beneficial to avoid scratching the battery monomer 21 and the blue film on the battery monomer 21 by the tool.

[0156] Optionally, referring to Figures 14 to 18 , the baffle plate 16 is arranged at the end of the pocket bottom plate 14 away from the side wall 11. In this way, the baffle plate 16 and the pocket bottom plate 14 can form an adhesive containing space 01 for containing the structural adhesive 30, and arranging the baffle plate 16 at the end of the pocket bottom plate 14 away from the side wall 11 can increase the volume of the adhesive containing space 01, thereby facilitating increasing the adhesive containing capacity, thereby facilitating avoiding the structural adhesive 30 overflowing from below the baffle plate 16 to the lower side of the battery monomer 21.

[0157] Please refer to Figure 20 , Figure 20 is Figure 13Figure 6 is a local enlarged view of the middle C, in some embodiments, the lower surface of the pocket bottom plate 14 is provided with a glue overflow groove 143 communicating with the glue overflow hole 141, the glue overflow groove 143 is arranged at the side of the glue overflow hole 141 away from the accommodation space 101, and penetrates the outer side surface 144 of the pocket bottom plate 14. Among them, the outer side surface 144 of the pocket bottom plate 14 is the side surface of the pocket bottom plate 14 away from the accommodation space 101 in the first direction X.

[0158] It can be understood that the structural glue 30 in the glue overflow hole 141 can overflow in the direction away from the accommodation space 101 through the glue overflow groove 143, and the structural glue 30 in the glue overflow groove 143 can overflow to the outer side (the side away from the accommodation space 101) of the side wall 11, thereby facilitating avoiding the structural glue 30 flowing to the lower side of the battery monomer 21.

[0159] Please refer to Figure 21 and Figure 22 , and combine Figure 3 , Figure 21 is a top view structural schematic diagram of the pocket bottom plate 14 and the baffle 16, Figure 22 is a sectional view structural schematic diagram along the line E-E in Figure 21 In some embodiments, the side of the pocket bottom plate 14 facing the battery monomer 21 is provided with a groove 142 along the second direction Y, at least part of the groove 142 is located between two adjacent glue overflow holes 141, and communicates with the two adjacent glue overflow holes 141. That is, the upper side of the pocket bottom plate 14 is provided with a groove 142, and the two ends of the groove 142 in the second direction Y respectively communicate with two adjacent glue overflow holes 141.

[0160] In this way, the groove 142 can accommodate the structural glue 30, and when one glue overflow hole 141 is full of structural glue 30, the structural glue 30 can enter the other adjacent glue overflow hole 141 through the groove 142, which is beneficial to the uniform distribution of the structural glue 30.

[0161] Please refer to Figures 3 to 22 , some embodiments of the present application propose a battery device 100, the battery device 100 comprises a shell 10 and a battery monomer assembly 20, the shell 10 has an accommodation space 101, and the shell 10 comprises two side walls 11 arranged oppositely along the first direction X, and the shell 10 further comprises a pocket bottom plate 14 arranged at the bottom of the side wall 11 and extending towards the accommodation space 101. The battery monomer assembly 20 is arranged in the accommodation space 101, and comprises a plurality of battery monomers 21 arranged in a stack along the second direction Y, the battery monomer assembly 20 is located between the two side walls 11 along the first direction X, the battery monomer 21 is bonded with the side wall 11 through the structural glue 30, and the first direction X is perpendicular to the second direction Y; the pocket bottom plate 14 is located below the battery monomer 21, and the pocket bottom plate 14 is provided with a glue overflow hole 141 penetrating the pocket bottom plate 14.

[0162] The two sides of the battery cell 21 along the first direction X are both first sides 211, the two sides of the battery cell 21 along the second direction Y are both second sides 212, and the connection between the first side 211 and the second side 212 is provided with a chamfer structure 213. The chamfer structures 213 between the adjacent two battery cells 21 form a glue containing groove 201, and the glue overflow hole 141 is in communication with the glue containing groove 201. The orthographic projection of the glue containing groove 201 on the pocket bottom plate 14 is located in the orthographic projection of the glue overflow hole 141 on the pocket bottom plate 14. The shell 10 further comprises a baffle 16 arranged below the pocket bottom plate 14, and the baffle 16 is located on the side of the overflow hole away from the side wall 11. The side of the pocket bottom plate 14 facing the battery cell 21 is provided with a groove 142 along the second direction Y, and the groove 142 is located between the adjacent two glue overflow holes 141 and is in communication with the adjacent two glue overflow holes 141.

[0163] Some embodiments of the present application also provide a power consuming device, which comprises the battery device 100 of any of the above embodiments. The power consuming device provided by the present application has the same or similar technical effects as the battery device 100 of any of the above embodiments, and details are not described herein.

[0164] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the same. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features. The modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that, include: The housing has a receiving space and includes two sidewalls disposed opposite each other along a first direction. The housing also includes a bottom plate disposed at the bottom of the sidewalls and extending toward the receiving space. A battery cell assembly is disposed within the receiving space and includes a plurality of battery cells stacked along a second direction. Along the first direction, the battery cell assembly is located between two sidewalls, and the battery cells are bonded to the sidewalls by structural adhesive. The first direction is perpendicular to the second direction. The bottom plate is located below the battery cell, and the bottom plate has an overflow hole that extends through the bottom plate.

2. The battery device as claimed in claim 1, characterized in that, The battery cell has two sides along the first direction that are both first sides, and two sides along the second direction that are both second sides. A chamfered structure is provided at the connection between the first side and the second side. An adhesive groove is formed between the chamfered structures of two adjacent battery cells. The overflow hole is connected to the adhesive groove.

3. The battery device as claimed in claim 2, characterized in that, The size of the overflow hole in the second direction is larger than the size of the adhesive receiving groove in the second direction; And / or, the size of the overflow hole in the first direction is greater than the size of the adhesive reservoir in the first direction.

4. The battery device as claimed in claim 3, characterized in that, The orthographic projection of the adhesive reservoir on the bottom plate is located within the orthographic projection of the adhesive overflow hole on the bottom plate.

5. The battery device as claimed in claim 2, characterized in that, There are multiple overflow holes, which are arranged corresponding to the glue receiving tank.

6. The battery device according to any one of claims 1 to 5, characterized in that, The extension direction of the central axis of the overflow hole intersects the first direction and the second direction.

7. The battery device according to any one of claims 1 to 5, characterized in that, The diameter of the overflow hole gradually increases from the upper end to the lower end of the overflow hole.

8. The battery device according to any one of claims 1 to 5, characterized in that, The overflow hole includes an inlet and an outlet. The inlet is located at the upper end of the overflow hole, and the outlet is located at the lower end of the overflow hole. At least a portion of the outlet is located on the side of the inlet away from the receiving space.

9. The battery device as claimed in claim 8, characterized in that, The distance between the central axis of the overflow hole and the inner surface of the sidewall is a first distance, which gradually decreases from the upper end to the lower end of the sidewall.

10. The battery device according to any one of claims 1 to 5, characterized in that, The housing also includes a baffle disposed below the bottom plate, the baffle being located on the side of the overflow hole away from the side wall, for preventing the structural adhesive leaking from the overflow hole from flowing down to the bottom of the battery cell.

11. The battery device as claimed in claim 10, characterized in that, The baffle is located at the end of the bottom plate away from the side wall.

12. The battery device according to any one of claims 1 to 5, characterized in that, The lower surface of the bottom plate is provided with an overflow groove that communicates with the overflow hole. The overflow groove is located on the side of the overflow hole away from the receiving space and extends through the outer surface of the bottom plate.

13. The battery device according to any one of claims 1 to 5, characterized in that, The bottom plate has a groove on the side facing the battery cell. Along the second direction, the groove is located between two adjacent overflow holes and connects the two adjacent overflow holes.

14. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 13.

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