Battery device and electric device

Abstract

The utility model provides a battery device and an electric device. The battery device includes a first battery cell assembly, a second battery cell assembly, a case, and a connector. The first battery monomer assembly and the second battery monomer assembly are arranged along the gravity direction, and the second battery monomer assembly is positioned above the first battery monomer assembly. The first battery monomer assembly and the second battery monomer assembly are arranged in the box body, the box body comprises a bottom wall and a side wall, the bottom wall is used for bearing the first battery monomer assembly, the side wall is arranged around the bottom wall, and one end of the side wall is connected with the bottom wall. The connector is used for connecting an external device. Wherein the side wall comprises a first wall, the first wall is located on one side of the first battery monomer assembly and the second battery monomer assembly in the first direction, the connector is arranged on the first wall, and the orthographic projection of the connector and the orthographic projection of the second battery monomer assembly are at least partially overlapped on a projection plane perpendicular to the first direction. According to the technical scheme, the reliability of the battery device can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery production technology, and in particular to a battery device and an electrical device. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In the development of battery device technology, how to improve the reliability of battery devices is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The present application provides a battery device, an energy storage device, and an electricity-consuming device, which can improve the reliability of the battery device.

[0005] This application is achieved through the following technical solutions:

[0006] In a first aspect, the present application provides a battery device. The battery device includes a first battery cell assembly, a second battery cell assembly, a case and a connector. The first battery cell assembly and the second battery cell assembly are arranged along the direction of gravity, and the second battery cell assembly is located above the first battery cell assembly. The first battery cell assembly and the second battery cell assembly are arranged in the case, and the case includes a bottom wall and a side wall. The bottom wall is used to support the first battery cell assembly, and the side wall is arranged around the bottom wall, and one end of the side wall is connected to the bottom wall. The connector is used to connect to an external device. The side wall includes a first wall, and the first wall is located on one side of the first battery cell assembly and the second battery cell assembly in a first direction. The connector is arranged on the first wall. On the projection plane perpendicular to the first direction, the orthographic projection of the connector at least partially overlaps with the orthographic projection of the second battery cell assembly, and the first direction is perpendicular to the direction of gravity.

[0007] In the technical solution of the embodiment of the present application, the first and second battery cell assemblies are arranged along the direction of gravity, and the first and second battery cell assemblies are disposed within the same housing. This improves space utilization in the battery device and increases the energy density of the battery device. Furthermore, when liquid (such as condensed water or leaked electrolyte) appears within the housing, the liquid will collect on the bottom wall of the housing due to gravity. On a projection plane perpendicular to the first direction, the orthographic projection of the connector and the orthographic projection of the second battery cell assembly at least partially overlap. Furthermore, the second battery cell assembly is positioned above the first battery cell assembly, meaning that the connector is positioned higher. This reduces the risk of short circuits caused by contact between the connector and liquid, thereby improving the reliability of the battery device.

[0008] In some embodiments, the distance D between the connector and the bottom wall in the direction of gravity satisfies: 160mm≤D≤500mm.

[0009] The technical solution of the embodiments of the present application satisfies the above condition for the distance between the connector and the bottom wall in the direction of gravity, so that the distance between the connector and the bottom wall is relatively large, which can reduce the risk of short circuit caused by the contact of the connector with liquid, thereby improving the reliability of the battery device. Meanwhile, when D≤500mm, the distance between the connector and the first battery monomer assembly is relatively small, which facilitates the connection of the connector and the first battery monomer assembly.

[0010] In some embodiments, 160mm≤D≤400mm.

[0011] The technical solution of the embodiments of the present application satisfies the above condition for the distance between the connector and the bottom wall in the direction of gravity, which can further reduce the risk of short circuit caused by the contact of the connector with liquid, thereby improving the reliability of the battery device, and can further improve the convenience of the connection of the connector and the first battery monomer assembly.

[0012] In some embodiments, the first wall is provided with a through hole, the connector includes a connecting piece and a mounting plate, the connecting piece is arranged on the mounting plate, and the mounting plate is arranged on the first wall and closes the through hole to separate the inside of the box from the outside. The connecting piece is arranged through the through hole, one end of the connecting piece is located in the inside of the box to be electrically connected with the first battery monomer assembly and the second battery monomer assembly, and the other end of the connecting piece is located outside the box to be electrically connected with the external device.

[0013] The technical solution of the embodiments of the present application separates the inside of the box from the outside by arranging the mounting plate to close the through hole, which can improve the sealing property of the box, facilitate the reduction of the risk of damage to the electrical elements in the box, and improve the reliability of the battery device. The connecting piece is arranged through the through hole, one end of the connecting piece is located in the inside of the box and electrically connected with the first battery monomer assembly and the second battery monomer assembly, and the other end of the connecting piece is located outside the box and electrically connected with the external device, which can improve the convenience of the connection of the battery device and the external device.

[0014] In some embodiments, the box includes a first sub-box and a second sub-box, the first sub-box and the second sub-box are arranged opposite to each other in the direction of gravity, and the first sub-box and the second sub-box are buckled. The battery device further includes a support arranged in the box, the first sub-box and the support enclose a first containing space, the first battery monomer assembly is contained in the first containing space, the second sub-box and the support enclose a second containing space, and the second battery monomer assembly is contained in the second containing space.

[0015] According to the technical solution of the embodiment of the present application, the first sub-box and the bracket form a first accommodation space to accommodate the first battery cell assembly, and the second sub-box and the bracket form a second accommodation space to accommodate the second battery cell assembly, so as to facilitate the stacking arrangement of the first battery cell assembly and the second battery cell assembly along the direction of gravity, reduce the risk of interference between the first battery cell assembly and the second battery cell assembly, and improve the reliability of the battery device.

[0016] In some embodiments, the sidewalls include two first sub-sidewalls arranged opposite each other along a first direction, two second sub-sidewalls arranged opposite each other along a second direction, and two third sub-sidewalls arranged opposite each other along the second direction, with the first direction, the second direction, and the direction of gravity being perpendicular to each other. The box also includes a top wall, two second sub-sidewalls arranged at both ends of the bottom wall in the second direction to form a first sub-box, and two third sub-sidewalls arranged at both ends of the top wall in the second direction to form a second sub-box. The first sub-box and the second sub-box are fastened together to form openings at both ends in the first direction, and the two first sub-sidewalls respectively close the two openings. The first wall is the first sub-sidewall.

[0017] The technical solution of the embodiment of the present application provides a first sub-side wall, which facilitates the installation of connectors and other components, such as explosion-proof valves and water-cooling connectors, on the first sub-side wall, facilitating normal charging and discharging of the battery device. The first sub-side wall also seals the opening, improving the sealing of the box.

[0018] In some embodiments, a first flow channel is formed inside the bottom wall, and the first flow channel is used to accommodate a heat exchange medium; a second flow channel is formed inside the bracket, and the second flow channel is used to accommodate a heat exchange medium.

[0019] The technical solution of the embodiment of the present application regulates the temperature of the first battery cell assembly by the heat exchange medium in the first flow channel and regulates the temperature of the second battery cell assembly by the heat exchange medium in the second flow channel, thereby reducing the impact of temperature on the charge and discharge performance of the battery device.

[0020] In some embodiments, the battery device further includes a first water inlet connector, a first water outlet connector, a first water inlet branch, and a first water outlet branch. One end of the first water inlet connector is connected to the bracket and communicates with the second flow channel, and the other end of the first water inlet connector is connected to the first water inlet branch. One end of the first water outlet connector is connected to the bracket and communicates with the second flow channel, and the other end of the first water outlet connector is connected to the first water outlet branch. The first water inlet branch and the first water outlet branch are spaced apart along the second direction, and on the same projection plane perpendicular to the first direction, the orthographic projection of the connector is located between the orthographic projections of the first water inlet branch and the first water outlet branch.

[0021] In the technical solution of the embodiment of the present application, the first water inlet branch pipe inputs a heat exchange medium into the second flow channel through the first water inlet joint, and the first water outlet branch pipe outputs the heat exchange medium in the second flow channel through the first water outlet joint, thereby realizing the circulation of the heat exchange medium in the second flow channel and improving the heat exchange effect of the second battery cell assembly. At the same time, on the same projection plane perpendicular to the first direction, the orthographic projection of the connector is located between the orthographic projection of the first water inlet branch pipe and the orthographic projection of the first water outlet branch pipe, which can reduce the risk of interference between the first water inlet branch pipe and the first water outlet branch pipe and the connector, and also reduce the leakage of the heat exchange medium in the connecting pipe or the contact of condensed water generated on the outer surface of the connecting pipe with the connector, thereby reducing the risk of the connector short-circuiting and improving the reliability of the battery device. In some embodiments, the third sub-side wall is connected to the top wall by a circular arc transition.

[0022] According to the technical solution of the embodiment of the present application, the third sub-side wall is connected to the top wall by a circular arc transition, and the first sub-side wall closes the opening, that is, the surface connecting the first sub-side wall and the third sub-side wall and the surface connecting the first sub-side wall and the top wall are also connected by a circular arc transition, so that the connection between the corners is an arc, so that the connection between the first sub-side wall and the second sub-box body has better sealing, thereby improving the sealing of the box body.

[0023] In some embodiments, the first sub-sidewall includes an inner surface facing the second battery cell assembly, an outer surface facing away from the second battery cell assembly, and a connecting surface connecting the inner and outer surfaces. The connecting surface includes a first straight region, a second straight region, and a transition region, with the first and second straight regions connected at both ends of the transition region, the first straight region connected to the top wall, the second straight region connected to the third sub-sidewall, and the transition region connected to the arc to close the opening.

[0024] The technical solution of the embodiment of the present application is to connect the top wall with the first straight area, connect the third sub-side wall with the second straight area, and connect the arc with the transition area, so that the connection between the first sub-side wall and the second sub-box body has better sealing, further improving the sealing of the box body.

[0025] In some embodiments, the first sub-sidewall includes a first portion and a second portion. On a projection plane perpendicular to the first direction, an orthographic projection of the first portion at least partially overlaps with an orthographic projection of the first battery cell assembly, and an orthographic projection of the second portion at least partially overlaps with an orthographic projection of the second battery cell assembly. The connector is disposed on the second portion.

[0026] According to the technical solution of the embodiment of the present application, on the projection plane perpendicular to the first direction, the orthographic projection of the first part at least partially overlaps with the orthographic projection of the first battery cell assembly, and the orthographic projection of the second part at least partially overlaps with the orthographic projection of the second battery cell assembly, that is, the second part is located above the first part, and the connector is arranged in the second part, that is, the connector is arranged at a higher position, which reduces the risk of the connector contacting the liquid and causing a short circuit, thereby improving the reliability of the battery device.

[0027] In some embodiments, the first portion and the second portion are integrally formed.

[0028] According to the technical solution of the embodiment of the present application, the first part and the second part are integrally formed, which facilitates the processing and installation of the first wall.

[0029] In a second aspect, the present application further provides an electrical device, comprising a battery device according to any one of the embodiments of the first aspect, wherein the battery device is used to provide electrical energy to the electrical device.

[0030] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0033] Figure 2 A schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application;

[0034] Figure 3 A schematic diagram of the installation of a connector provided in some embodiments of the present application;

[0035] Figure 4 A schematic diagram of a battery device provided in some embodiments of the present application from another perspective;

[0036] Figure 5 A schematic diagram of a battery device according to some embodiments of the present application from another perspective;

[0037] Figure 6 This is a partial structural diagram of the first sub-sidewall in some embodiments of the present application.

[0038] Icons: 1-battery device; 10-first battery cell assembly; 20-second battery cell assembly; 30-box; 31-bottom wall; 311-first flow channel; 32-side wall; 321-first wall; 3211-through hole; 3212-first part; 3213-second part; 322-first sub-side wall; 3221-inner surface; 3222-outer surface; 3223-connecting surface; 32231-first flat area; 32232-second flat area; 32233-transition area; 323-second sub-side wall; 324-third sub-side wall; 33-first sub-box; 34- Second sub-box; 35-arc; 36-top wall; 37-opening; 40-connector; 41-connecting piece; 411-first sub-connecting piece; 412-second sub-connecting piece; 42-mounting plate; 50-bracket; 51-second flow channel; 60-first water inlet connector; 61-first water outlet connector; 62-first water inlet branch pipe; 63-first water outlet branch pipe; 64-second water inlet connector; 65-second water outlet connector; 66-second water inlet branch pipe; 67-second water outlet branch pipe; 100-vehicle; 110-controller; 120-motor; X-direction of gravity; Y-first direction; Z-second direction. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0041] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0043] In this application, the term "and / or" simply describes the relationship between related objects, indicating that three possible relationships exist. For example, "A and / or the second direction" can represent: A exists alone, A and the second direction exist simultaneously, and the second direction exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0044] The term "multiple" in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0045] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0046] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. For example, the battery cell assembly may be a battery module, which is a battery module formed by arranging and securing multiple battery cells to form a single module. For example, a battery module may be formed by bundling multiple battery cells using cable ties.

[0047] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0048] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box by fixing the battery module in the box.

[0049] As an example, the battery cell assembly can also be accommodated in the box by fixing a plurality of battery cells directly to the box.

[0050] As an example, the box forms a closed space to accommodate the battery cell assembly. Here, closed means covered or closed, which can be sealed or unsealed.

[0051] As an example, the box can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected with the frame, so that the box forms a closed space inside to accommodate the battery cell assembly.

[0052] As an example, the box can be part of the chassis structure of the vehicle. For example, the top cover of the box can be at least part of the floor of the vehicle, or the frame of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0053] In some embodiments, the battery device refers to an energy storage device, and the energy storage device includes a box, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0054] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0055] The battery cell can be, but is not limited to, 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.

[0056] The development of battery technology needs to consider many design factors, such as energy density, cycle life, discharge capacity, charge-discharge rate, and other performance parameters. In addition, the reliability of the battery device is also one of the key factors to be considered as the environmental conditions and / or the internal conditions of the battery change.

[0057] At present, the battery cell assembly is arranged in the box and carried on the bottom wall, thereby forming a battery device. The connector is arranged on the wall of the box and used to connect the battery cell assembly and the external device.

[0058] The battery device is provided with a heat exchange component, such as a heat exchange flow channel, for heat exchange with the battery monomer assembly. The heat exchange component exchanges heat with the battery monomer assembly through the flow of a heat exchange medium, which can be a liquid. However, there is a risk of leakage of the heat exchange medium. In addition, there is a risk that the sealing of the box body fails, causing liquid from the outside to enter the box body. Under the action of gravity, the liquid entering the box body collects at the bottom of the box body, i.e., at the bottom wall, and there is a risk of contact with the connector, causing the connector to short circuit, resulting in poor reliability of the battery device.

[0059] Based on the above considerations, in order to solve the problem of contact between the liquid entering the box body and the connector causing the connector to short circuit and affecting the reliability of the battery device, an embodiment of the present application provides a battery device. The battery device comprises a first battery monomer assembly, a second battery monomer assembly, a box body and a connector. The first battery monomer assembly and the second battery monomer assembly are arranged along the direction of gravity, and the second battery monomer assembly is located above the first battery monomer assembly. The first battery monomer assembly and the second battery monomer assembly are arranged in the box body, the box body comprises a bottom wall and a side wall, the bottom wall is used to bear the first battery monomer assembly, the side wall is arranged around the bottom wall, and one end of the side wall is connected with the bottom wall. The connector is used to connect external devices. The side wall comprises a first wall, the first wall is located on one side of the first battery monomer assembly and the second battery monomer assembly in a first direction, the connector is arranged on the first wall, and the orthogonal projection of the connector at least partially overlaps the orthogonal projection of the second battery monomer assembly on a projection plane perpendicular to the first direction. The first direction is perpendicular to the direction of gravity.

[0060] When liquid appears in the box body, the liquid will collect at the bottom wall of the box body due to gravity. On the projection plane perpendicular to the first direction, the orthogonal projection of the connector at least partially overlaps the orthogonal projection of the second battery monomer assembly, and the second battery monomer assembly is located above the first battery monomer assembly, i.e., the connector is arranged at a higher position, reducing the risk of contact between the connector and the liquid and thus short circuit, and improving the reliability of the battery device.

[0061] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery monomers and battery devices, such as electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes airplanes, rockets, space shuttles and spacecraft, etc.

[0062] The following embodiments are described with reference to a vehicle as an example of an electric device according to an embodiment of the present application for convenience of description.

[0063] Please refer to Figure 1 , Figure 1Schematic diagram of the structure of a vehicle provided in some embodiments of the present application. Vehicle 100 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 1 is provided inside the vehicle 100. The battery device 1 can be provided at the bottom, head, or tail of the vehicle 100. The battery device 1 can be used to power the vehicle 100. For example, the battery device 1 can serve as the operating power source of the vehicle 100 and be used for the circuit system of the vehicle 100, such as for the working power requirements during the startup, navigation, and operation of the vehicle 100.

[0064] The vehicle 100 may further include a controller 110 and a motor 120 . The controller 110 is used to control the battery device 1 to supply power to the motor 120 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 100 .

[0065] In some embodiments of the present application, the battery device 1 can serve not only as an operating power source for the vehicle 100 , but also as a driving power source for the vehicle 100 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100 .

[0066] The battery device includes a battery cell assembly and a power management system. The battery management system is connected to the battery cell assembly and is used to manage the charging and discharging of the battery cell assembly.

[0067] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of the present application. The battery device 1 may further include a housing 30, in which the first battery cell assembly 10 and the second battery cell assembly 20 are housed. The housing 30 is used to provide a storage space for the first battery cell assembly 10 and the second battery cell assembly 20, and the housing 30 may adopt a variety of structures. In some embodiments, the housing 30 may include a first sub-housing 33 and a second sub-housing 34, which cover each other and together define a storage space for accommodating the first battery cell assembly 10 and the second battery cell assembly 20. The first sub-box 33 can be a hollow structure with one end open, and the second sub-box 34 can be a plate-like structure. The second sub-box 34 covers the open side of the first sub-box 33, so that the first sub-box 33 and the second sub-box 34 jointly define a storage space; the first sub-box 33 and the second sub-box 34 can also be hollow structures with one side open, and the open side of the first sub-box 33 covers the open side of the second sub-box 34.

[0068] In the battery device 1, there may be multiple first battery cell assemblies 10. These multiple first battery cell assemblies 10 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections within the multiple first battery cell assemblies 10. The multiple first battery cell assemblies 10 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire assembly of the multiple first battery cell assemblies 10 is housed within the housing 30. Alternatively, the battery device 1 may comprise multiple first battery cell assemblies 10 first connected in series, in parallel, or in a hybrid connection to form a battery module. The multiple battery modules are then connected in series, in parallel, or in a hybrid connection to form a single assembly, which is then housed within the housing 30.

[0069] There may be multiple second battery cell assemblies 20, and these multiple second battery cell assemblies 20 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections within the multiple second battery cell assemblies 20. The multiple second battery cell assemblies 20 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire assembly of the multiple second battery cell assemblies 20 is housed within the housing 30. Alternatively, the battery device 1 may comprise multiple second battery cell assemblies 20 first connected in series, in parallel, or in a hybrid connection to form a battery module, which is then further connected in series, in parallel, or in a hybrid connection to form a single assembly and housed within the housing 30.

[0070] Finally, the first battery cell assembly 10 and the second battery cell assembly 20 are connected to the outside or are connected to the outside respectively.

[0071] The first battery cell assembly 10 and the second battery cell assembly 20 may each include a plurality of battery cells, which may be secondary batteries or primary batteries; the battery cells may also be lithium-sulfur batteries, sodium-ion batteries or magnesium-ion batteries, but are not limited thereto.

[0072] Please refer to Figure 2 , and refer to Figure 3 and Figure 4 , Figure 3 A schematic diagram of the installation of a connector provided in some embodiments of the present application; Figure 4 A schematic diagram of a battery device from another perspective provided in some embodiments of the present application, wherein Figure 4The wall of the box hides part of the box. Embodiments of the present application provide a battery device 1. The battery device 1 comprises a first battery monomer assembly 10, a second battery monomer assembly 20, a box 30 and a connector 40. The first battery monomer assembly 10 and the second battery monomer assembly 20 are arranged along a gravity direction X, and the second battery monomer assembly 20 is located above the first battery monomer assembly 10. The first battery monomer assembly 10 and the second battery monomer assembly 20 are arranged in the box 30, and the box 30 comprises a bottom wall 31 and a side wall 32. The bottom wall 31 is used to support the first battery monomer assembly 10, and the side wall 32 is arranged around the bottom wall 31. One end of the side wall 32 is connected to the bottom wall 31. The connector 40 is used to connect external devices. The side wall 32 comprises a first wall 321, which is located on one side of the first battery monomer assembly 10 and the second battery monomer assembly 20 in a first direction Y. The connector 40 is arranged on the first wall 321. In a projection plane perpendicular to the first direction Y, the orthogonal projection of the connector 40 at least partially overlaps the orthogonal projection of the second battery monomer assembly 20. The first direction Y is perpendicular to the gravity direction X.

[0073] In some embodiments, the first battery monomer assembly 10 and the second battery monomer assembly 20 are arranged along the gravity direction X. The structure of the first battery monomer assembly 10 and the structure of the second battery monomer assembly 20 can be the same or different.

[0074] In some embodiments, the projection of the first battery monomer assembly 10 and the projection of the second battery monomer assembly 20 can completely overlap or partially overlap in the gravity direction X.

[0075] In some embodiments, the gravity direction can be represented by the direction indicated by the letter X in the figure.

[0076] In some embodiments, the gravity direction X can be the height direction of the battery device 1.

[0077] In some embodiments, the box 30 comprises a bottom wall 31 and a side wall 32. The bottom wall 31 can be a box wall located below the box 30. The side wall 32 can extend along the gravity direction X. One end of the side wall 32 is connected to the bottom wall 31.

[0078] In some embodiments, the connection between the side wall 32 and the bottom wall 31 can be one-piece forming, welding or bolt locking, etc.

[0079] In some embodiments, a connector 40 is disposed on the first wall 321 and is used to connect to an external device. When the external device is an electrical device, the connector 40 is connected to the electrical device to transmit power from the battery device 1 to the electrical device, thereby providing power to the electrical device. When the external device is an energy storage device or a power supply, the connector 40 is connected to the energy storage device or power supply to transmit power from the energy storage device or power supply to the battery device 1, thereby charging the battery device 1.

[0080] In some embodiments, the sidewall 32 includes a first wall 321 , and the first wall 321 may be located on one side of the first and second battery cell assemblies 10 and 20 in the first direction Y.

[0081] In some embodiments, the first direction may be represented by the direction indicated by the letter Y in the figure.

[0082] In some embodiments, the first direction Y may be the length direction of the battery device 1 or the width direction of the battery device 1 .

[0083] In some embodiments, the first direction Y may be parallel to the gravity direction X.

[0084] In some embodiments, the connector 40 is disposed on the first wall 321 , and the arrangement may be by bolt locking or welding.

[0085] In some embodiments, on a projection plane perpendicular to the first direction Y, that is, with the first direction Y as the projection direction, the connector 40 and the second battery cell assembly 20 are projected onto a projection plane parallel to the gravity direction X.

[0086] In some embodiments, the orthographic projection of the connector 40 may completely overlap with the orthographic projection of the second battery cell assembly 20, or a portion of the orthographic projection of the connector 40 may overlap with the orthographic projection of the second battery cell assembly 20, while another portion may not overlap with the orthographic projection of the second battery cell assembly 20. The portion that does not overlap with the orthographic projection of the second battery cell assembly 20 may be located below the portion that overlaps with the orthographic projection of the second battery cell assembly 20, or the portion that does not overlap with the orthographic projection of the second battery cell assembly 20 may be located above the portion that overlaps with the orthographic projection of the second battery cell assembly 20.

[0087] In some embodiments, in the direction of gravity X, at least a portion of the connector 40 corresponds to the second battery cell assembly 20, that is, at least a portion of the first battery cell assembly 10 is located between the connector 40 and the bottom wall 31, and there is a certain distance between the connector 40 and the bottom wall 31. When liquid exists in the box 30, the liquid collects on the bottom wall 31 of the box 30, and there is also a certain distance between the liquid and the connector 40.

[0088] The technical scheme of the embodiment of the present application is that the first battery monomer assembly 10 and the second battery monomer assembly 20 are arranged along the gravity direction X, and the first battery monomer assembly 10 and the second battery monomer assembly 20 are arranged in the same box 30, so that the battery device 1 has better space utilization and the energy density of the battery device 1 is improved. At the same time, when liquid (such as condensed water or leaked electrolyte) appears in the box 30, the liquid will gather on the bottom wall 31 of the box 30 due to gravity. On the projection plane perpendicular to the first direction Y, the orthographic projection of the connector 40 at least partially overlaps the orthographic projection of the second battery monomer assembly 20, and the second battery monomer assembly 20 is located above the first battery monomer assembly 10, that is, the connector 40 is arranged at a higher position, which can reduce the risk of contact between the connector 40 and the liquid and thus short circuit, thereby improving the reliability of the battery device 1.

[0089] Please refer to Figures 2 to 4 In some embodiments, in the gravity direction X, the connector 40 and the bottom wall 31 have a distance D, which satisfies: 160mm≤D≤500mm.

[0090] In order to arrange the first battery monomer assembly 10 and the second battery monomer assembly 20 in the box 30 along the gravity direction X, in the gravity direction X, the size of the box 30 can be greater than the sum of the size of the first battery monomer assembly 10 and the size of the second battery monomer assembly 20, so as to reduce the risk of interference between the box 30 and the first battery monomer assembly 10 and the second battery monomer assembly 20 in the gravity direction X. At the same time, in order to improve the space utilization of the battery device 1 and make the battery device 1 have higher energy density, the size of the box 30 in the gravity direction X is not set too large, so as to reduce the waste of space in the box 30. In the gravity direction X, the size of the box 30 can be the size of the first wall 321, and the connector 40 is arranged on the first wall 321, the distance between the connector 40 and the end of the first wall 321 away from the bottom wall 31 can be small, and the maximum distance between the connector 40 and the bottom wall 31 depends on the size of the first wall 321.

[0091] Therefore, in some embodiments, in the gravity direction X, the distance D between the connector 40 and the bottom wall 31 satisfies the condition: 160mm≤D≤500mm. D can be any value or a value between any two values of 160mm, 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, 500mm.

[0092] In some embodiments, when the battery device 1 is set in an electrical device, there may be a scenario where the battery device 1 is tilted. When tilted, the bottom wall 31 of the box 30 is at an angle to the horizontal direction, and the angle can range from 0° to 20°. At this time, if there is liquid in the box 30, due to the tilt, the liquid gathers in one corner of the box 30. Compared with the case where the battery device 1 is placed horizontally, the height of the liquid in the direction of gravity increases. Because the distance D between the connector 40 and the bottom wall 31 meets the condition: 160mm≤D≤500mm, when the battery device 1 is tilted, the risk of the connector 40 contacting the liquid and causing a short circuit can be reduced, thereby improving the reliability of the battery device 1.

[0093] According to the technical solution of the embodiment of the present application, in the gravity direction X, the distance between the connector 40 and the bottom wall 31 meets the above conditions, so that the distance between the connector 40 and the bottom wall 31 is larger, which can reduce the risk of the connector 40 contacting the liquid and causing a short circuit, thereby improving the reliability of the battery device 1. At the same time, when 160mm≤D≤500mm, the distance between the connector 40 and the first battery cell assembly 10 is smaller, which facilitates the connection between the connector and the first battery cell assembly 10.

[0094] Please refer to Figures 2 to 4 , in some embodiments, 160mm≤D≤400mm.

[0095] In some embodiments, in the gravity direction X, the distance D between the connector 40 and the bottom wall 31 satisfies the condition: 160 mm ≤ D ≤ 400 mm. D can be any value among 160 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, or a value between any two values.

[0096] According to the technical solution of the embodiment of the present application, in the direction of gravity X, the distance between the connector 40 and the bottom wall 31 meets the above conditions, which can further reduce the risk of the connector 40 coming into contact with the liquid and causing a short circuit, thereby improving the reliability of the battery device 1 and further improving the convenience of connecting the connector 40 to the first battery cell assembly 10.

[0097] Please refer to Figure 4 In some embodiments, the first wall 321 is provided with a through hole 3211, and the connector 40 includes a connector 41 and a mounting plate 42. The connector 41 is disposed on the mounting plate 42, which is disposed on the first wall 321 and closes the through hole 3211, thereby isolating the interior of the box 30 from the outside. The connector 41 passes through the through hole 3211. One end of the connector 41 is located inside the box 30 to electrically connect to the first battery cell assembly 10 and the second battery cell assembly 20. The other end of the connector 41 is located outside the box 30 for electrical connection to an external device.

[0098] In some embodiments, the first wall 321 is provided with a through hole 3211, which may penetrate the inner and outer surfaces of the first wall 321. The inner surface of the first wall 321 may be a surface facing the first battery cell assembly 10 and the second battery cell assembly 20 in the first direction Y, and the outer surface of the first wall 321 may be a surface facing away from the first battery cell assembly 10 and the second battery cell assembly 20 in the first direction Y.

[0099] In some embodiments, the first wall 321 may be an integrally formed plate, and the through hole 3211 may be generated in the first wall 321 by machining, or may be formed in the first wall 321 by casting.

[0100] In some embodiments, a connector 41 is disposed through the through-hole 3211, with one end of the connector 41 extending into the housing 30 to connect the first battery cell assembly 10 and the second battery cell assembly 20, thereby achieving electrical connection between the connector 41 and the first battery cell assembly 10 and the second battery cell assembly 20. Alternatively, the connector 41 may be connected to the first battery cell assembly 10 and the second battery cell assembly 20 by connecting the combined currents of the first battery cell assembly 10 and the second battery cell assembly 20. Alternatively, the connector 41 may be connected to each of the first battery cell assembly 10 and the second battery cell assembly 20.

[0101] In some embodiments, the number of the connector 41 may be one, and the first battery cell assembly 10 and the second battery cell assembly 20 are electrically connected to an external device at the same time through the one connector 41 .

[0102] In some embodiments, the connector 41 may be a component composed of a wire and a conductive terminal, the wire is connected to the conductive terminal, the wire connects the first battery cell assembly 10 and the second battery cell assembly 20, and the conductive terminal is connected to an external device through an external circuit.

[0103] In some embodiments, the mounting plate 42 is disposed on the first wall 321 , and the mounting plate 42 can be connected to the first wall 321 by welding, gluing, bolt locking, etc.

[0104] In some embodiments, the mounting plate 42 may close the through hole 3211 by having the same size as the through hole 3211, with the edge of the mounting plate 42 abutting against the wall of the through hole 3211. Alternatively, the mounting plate 42 may be larger than the through hole 3211, and the mounting plate 42 may be disposed on the inner or outer surface of the first wall 321, completely covering the through hole 3211.

[0105] In some embodiments, the connector 41 is disposed on the mounting plate 42. The connector 41 can be integrally formed with the mounting plate 42, or the mounting hole can be provided with a passage for the connector 41 to pass through, so that the connector 41 can connect the first battery cell assembly 10, the second battery cell assembly 20, and an external device. The connector 41 and the mounting plate 42 can be isolated by an insulating material, or the mounting plate 42 can be made of an insulating material.

[0106] In some embodiments, the connector 41 includes a first sub-connector 411 and a second sub-connector 412 . The first sub-connector 411 and the second sub-connector 412 have opposite polarities and are both disposed on the mounting plate 42 .

[0107] In some embodiments, the first sub-connector 411 may connect the positive electrode of the first battery cell assembly 10 and the positive electrode of the second battery cell assembly 20 , and the second sub-connector 412 may connect the negative electrode of the first battery cell assembly 10 and the negative electrode of the second battery cell assembly 20 .

[0108] Alternatively, the second sub-connector 412 may connect the positive electrode of the first battery cell assembly 10 and the positive electrode of the second battery cell assembly 20 , and the first sub-connector 411 may connect the negative electrode of the first battery cell assembly 10 and the negative electrode of the second battery cell assembly 20 .

[0109] In some embodiments, the first sub-connector 411 and the second sub-connector 412 can both be arranged on the same connecting plate, that is, the positive output terminal and the negative output terminal of the battery device 1 are arranged on the same mounting plate 42, avoiding the positive output terminal and the negative output terminal of the battery device 1 being arranged on different plates, thereby saving installation steps.

[0110] The first sub-connector 411 and the second sub-connector 412 are both arranged on the mounting plate 42. The first sub-connector 411 and the second sub-connector 412 can be fixed together on the fixing mounting plate 42, which facilitates the installation of the first sub-connector 411 and the second sub-connector 412 and improves the installation convenience.

[0111] The technical solution of the embodiment of the present application isolates the interior of the housing 30 from the outside by providing a mounting plate 42 to seal the through-hole 3211. This improves the sealing performance of the housing 30, reduces the risk of damage to the electrical components within the housing 30, and enhances the reliability of the battery device 1. A connector 40 is disposed through the through-hole 3211, with one end located inside the housing 30 and electrically connected to the first battery cell assembly 10 and the second battery cell assembly 20, and the other end located outside the housing 30 and electrically connected to an external device. This allows for the convergence of the first and second battery cell assemblies 10, 20, preventing the first and second battery cell assemblies 10, 20 from being electrically connected to external devices separately, thereby enhancing the convenience of connecting the battery device 1 to external devices.

[0112] Please refer to Figures 2 to 4 In some embodiments, the housing 30 includes a first sub-housing 33 and a second sub-housing 34. The first sub-housing 33 and the second sub-housing 34 are disposed opposite each other along the gravity direction X and are engaged with each other. The battery device 1 further includes a bracket 50 disposed within the housing 30. The first sub-housing 33 and the bracket 50 form a first accommodation space, in which the first battery cell assembly 10 is accommodated. The second sub-housing 34 and the bracket 50 form a second accommodation space, in which the second battery cell assembly 20 is accommodated.

[0113] In some embodiments, the structures of the first sub-box 33 and the second sub-box 34 may be the same or different.

[0114] In some embodiments, the bracket 50 may be made of metal, such as copper, aluminum, etc.

[0115] In some embodiments, the bracket 50 is disposed in the box body 30 , and can divide the internal space of the box body 30 into a first accommodation space and a second accommodation space.

[0116] In some embodiments, the bracket 50 and the first sub-box 33 form a first accommodation space in which the first battery cell assembly 10 is accommodated, and the bracket 50 and the second sub-box 34 form a second accommodation space in which the second battery cell assembly 20 is accommodated.

[0117] The second battery cell assembly 20 is located above the first battery cell assembly 10 , that is, the second sub-box 34 may be the upper box 30 , and the first sub-box 33 may be the lower box 30 .

[0118] In some embodiments, the bracket 50 may be mounted on the box body 30 by bolting, welding, or the like.

[0119] According to the technical solution of the embodiment of the present application, the first sub-box 33 and the bracket 50 form a first accommodating space to accommodate the first battery cell assembly 10, and the second sub-box 34 and the bracket 50 form a second accommodating space to accommodate the second battery cell assembly 20, so as to facilitate the stacking arrangement of the first battery cell assembly 10 and the second battery cell assembly 20 along the gravity direction X, reduce the risk of interference between the first battery cell assembly 10 and the second battery cell assembly 20, and improve the reliability of the battery device 1.

[0120] Please refer to Figures 2 to 4 , and refer to Figure 5 , Figure 5 This is a schematic diagram of another perspective of a battery device provided in some embodiments of the present application. Figure 5 Part of the wall of the box is hidden in it. In some embodiments, the side wall 32 includes two first sub-side walls 322 arranged opposite to each other along the first direction Y, two second sub-side walls 323 arranged opposite to each other along the second direction Z, and two third sub-side walls 324 arranged opposite to each other along the second direction Z. The first direction Y, the second direction Z, and the gravity direction X are perpendicular to each other. The box 30 also includes a top wall 36. The two second sub-side walls 323 are arranged at both ends of the bottom wall 31 in the second direction Z to form a first sub-box 33. The two third sub-side walls 324 are arranged at both ends of the top wall 36 in the second direction Z to form a second sub-box 34. The first sub-box 33 and the second sub-box 34 are buckled together and form openings 37 at both ends in the first direction Y. The two first sub-side walls 322 respectively close the two openings 37. The first wall 321 is the first sub-side wall 322.

[0121] In some embodiments, the second direction may be represented by the direction indicated by the letter Z in the figure.

[0122] In some embodiments, the gravity direction X may be the height direction of the battery device 1, the first direction Y may be the length direction of the battery device 1, and the second direction Z may be the width direction of the battery device 1. The gravity direction X, the first direction Y, and the second direction Z are perpendicular to each other.

[0123] In some embodiments, the lower end of the second sub-side wall 323 in the gravity direction X is connected to the bottom wall 31, and the two second sub-side walls 323 are arranged at the two ends of the bottom wall 31 in the second direction Z to form a first sub-box body 33, that is, the two ends of the first sub-box body 33 in the first direction Y are not closed.

[0124] In some embodiments, the upper end of the third sub-side wall 324 in the gravity direction X is connected to the top wall 36, and the two third sub-side walls 324 are arranged at the two ends of the top wall 36 in the second direction Z to form a second sub-box body 34, that is, the two ends of the second sub-box body 34 in the first direction Y are not closed.

[0125] When the first sub-box 33 and the second sub-box 34 are fastened together, the top wall 36 and the bottom wall 31 are arranged opposite each other in the gravity direction X. The upper end of one second sub-side wall 323 in the gravity direction X is connected to the lower end of one third sub-side wall 324 in the gravity direction X. The upper end of the other second sub-side wall 323 in the gravity direction X is connected to the lower end of the other third sub-side wall 324 in the gravity direction X. Openings 37 are formed at both ends of the box 30 in the first direction Y. The second sub-side walls 323 and the third sub-side walls 324 can be connected by welding or bolts.

[0126] In some embodiments, one first sub-sidewall 322 closes the opening 37 at one end of the box body 30 in the first direction Y, and another first sub-sidewall 322 closes the opening 37 at the other end of the box body 30 in the first direction Y.

[0127] The technical solution of the embodiment of the present application provides a first sub-side wall 322 to facilitate installation of the connector 40 and other components, such as an explosion-proof valve and a water-cooling connector 40, on the first sub-side wall 322, thereby facilitating normal charging and discharging of the battery device 1. The first sub-side wall 322 also seals the opening 37, improving the sealing performance of the box body 30.

[0128] Please refer to Figure 4 In some embodiments, a first flow channel 311 is formed inside the bottom wall 31 for accommodating a heat exchange medium. A second flow channel 51 is formed inside the bracket 50 for accommodating a heat exchange medium.

[0129] In some embodiments, the heat exchange medium can be liquid, gas, etc.

[0130] In some embodiments, the heat exchange medium may be a coolant to cool the first battery cell assembly 10 and the second battery cell assembly 20 . The heat exchange medium may also be a heating medium to heat the first battery cell assembly 10 and the second battery cell assembly 20 .

[0131] The technical solution of the embodiment of the present application regulates the temperature of the first battery cell assembly 10 by the heat exchange medium in the first flow channel 311 and regulates the temperature of the second battery cell assembly 20 by the heat exchange medium in the second flow channel 51, thereby reducing the impact of temperature on the charge and discharge performance of the battery device 1.

[0132] Please refer to Figure 6 , Figure 6 This is a schematic diagram of a battery device from another perspective provided in some other embodiments of the present application, wherein Figure 6The first sub-sidewall is hidden in the figure. In some embodiments, the battery device 1 further includes a first water inlet connector 60, a first water outlet connector 61, a first water inlet branch pipe 62, and a first water outlet branch pipe 63. One end of the first water inlet connector 60 is connected to the bracket 50 and communicates with the second flow channel 51. The other end of the first water inlet connector 60 is connected to the first water inlet branch pipe 62. One end of the first water outlet connector 61 is connected to the bracket 50 and communicates with the second flow channel 51. The other end of the first water outlet connector 61 is connected to the first water outlet branch pipe 63. The first water inlet branch pipe 62 and the first water outlet branch pipe 63 are spaced apart along the second direction Z. On the same projection plane perpendicular to the first direction Y, the orthographic projection of the connector 40 is located between the orthographic projections of the first water inlet branch pipe 62 and the orthographic projections of the first water outlet branch pipe 63.

[0133] In some embodiments, one end of the first water inlet branch pipe 62 is connected to the outside world, and the other end is connected to the second flow channel 51 through the first water inlet joint 60, so that the heat exchange medium is transported from the outside world through the first water inlet branch pipe 62 to the second flow channel 51 to exchange heat with the second battery cell assembly 20.

[0134] After the heat exchange medium exchanges heat with the second battery cell assembly 20, for example, if the heat exchange medium is a cooling medium, the temperature of the heat exchange medium after heat exchange with the second battery cell assembly 20 will increase, and the cooling effect will be reduced. For example, if the heat exchange medium is a warming medium, the temperature of the heat exchange medium after heat exchange with the second battery cell assembly 20 will decrease, and the warming effect will be reduced. Therefore, in some embodiments, one end of the first water outlet branch pipe 63 is connected to the outside world, and the other end is connected to the second flow channel 51 through the first water outlet connector 61, so that the heat exchange medium after heat exchange with the second battery cell assembly 20 is discharged from the second flow channel 51, thereby achieving the replacement of the heat exchange medium.

[0135] Similarly, in some embodiments, the battery device further includes a second water inlet connector 64, a second water outlet connector 65, a second water inlet branch pipe 66, and a second water outlet branch pipe 67. One end of the second water inlet connector 64 is connected to the bottom wall 31 and communicates with the first flow channel 311, the other end of the second water inlet connector 64 is connected to the second water inlet branch pipe 66, one end of the second water outlet connector 65 is connected to the bottom wall and communicates with the first flow channel, and the other end of the second water outlet connector 65 is connected to the second water outlet branch pipe 67.

[0136] In some embodiments, one end of the second water inlet branch 66 is connected to the outside world, and the other end is connected to the first flow channel 311 through the second water inlet joint 64, so that the heat exchange medium is transported from the outside world through the second water inlet branch 66 to the first flow channel 311 to exchange heat with the first battery cell assembly 10.

[0137] In some embodiments, one end of the second water outlet branch pipe 67 is connected to the outside world, and the other end is connected to the first flow channel 311 through the second water outlet joint 65 to discharge the heat exchange medium after heat exchange with the first battery cell assembly 10 from the first flow channel 311, thereby realizing the replacement of the heat exchange medium.

[0138] In some embodiments, one end of the first water inlet branch pipe 62 away from the first water inlet joint 60 and one end of the second water inlet branch pipe 66 away from the second water inlet joint 64 can be connected to the same water inlet pipe in the box body 30, and the water inlet pipe is connected to the water inlet on the box body 30, thereby achieving communication with the outside world.

[0139] Similarly, in some embodiments, one end of the first water outlet branch pipe 63 away from the first water outlet joint 61 and one end of the second water outlet branch pipe 67 away from the second water outlet joint 65 can be connected to the same water outlet pipe in the box body 30, and the water outlet pipe is connected to the water outlet on the box body 30, thereby achieving communication with the outside world.

[0140] In some embodiments, the first water inlet joint 60 and the first water outlet joint 61 may be spaced apart along the second direction Z, and correspondingly, the first water inlet branch pipe 62 and the first water outlet branch pipe 63 may be spaced apart along the second direction Z.

[0141] In some embodiments, a portion of the connector 40 may be located at the same height as the first water inlet connector 60 and the first water outlet connector 61 in the gravity direction X. Therefore, on the same projection plane perpendicular to the first direction Y, the orthographic projection of the connector 40 is located between the orthographic projections of the first water inlet branch 62 and the orthographic projections of the first water outlet branch 63, that is, a portion of the connector 40 is located between the first water inlet branch 62 and the first water outlet branch 63.

[0142] In some embodiments, the first water inlet branch pipe 62 and the connector 40 may be spaced apart, and the minimum distance between the first water inlet branch pipe 62 and the connector 40 may be 10 mm, 20 mm, or the like.

[0143] In some embodiments, the first water outlet branch pipe 63 and the connector 40 may be spaced apart, and the minimum distance between the first water outlet branch pipe 63 and the connector 40 may be 10 mm, 20 mm, or the like.

[0144] In the technical solution of the embodiment of the present application, the first water inlet branch 62 inputs heat exchange medium into the second flow channel 51 through the first water inlet connector 60, and the first water outlet branch 63 outputs the heat exchange medium in the second flow channel 51 through the first water outlet connector 61, thereby circulating the heat exchange medium in the second flow channel 51 and improving the heat exchange effect on the second battery cell assembly 20. Furthermore, on the same projection plane perpendicular to the first direction Y, the orthographic projection of the connector 40 is located between the orthographic projections of the first water inlet branch 62 and the first water outlet branch 63. This reduces the risk of interference between the first water inlet branch 62 and the first water outlet branch 63 and the connector 40, as well as the risk of heat exchange medium leakage in the first water inlet branch 62 and the first water outlet branch 63, or condensed water generated on the outer surfaces of the first water inlet branch 62 and the first water outlet branch 63 coming into contact with the connector 40. This reduces the risk of short circuiting the connector 40 and improves the reliability of the battery device 1.

[0145] In some embodiments, the connection between the third sub-sidewall 324 and the top wall 36 may be an arc 35 .

[0146] Correspondingly, the first sub-sidewall 322 closes the opening 37. That is, the upper end of the first sub-sidewall 322 in the direction of gravity X is connected to the top wall 36, and the upper portion of one end of the first sub-sidewall 322 in the second direction Z is connected to a third sub-sidewall 324, and the lower portion is connected to a second sub-sidewall 323. The upper portion of the other end of the first sub-sidewall 322 in the second direction Z is connected to another third sub-sidewall 324, and the lower portion is connected to another second sub-sidewall 323. Therefore, the surface where the first sub-sidewall 322 connects to the third sub-sidewall 324 and the surface where the first sub-sidewall 322 connects to the top wall 36 are also connected by a circular arc 35, so that the first sub-sidewall 322 can effectively close the opening 37.

[0147] In some embodiments, the connection between the second sub-side wall 323 and the bottom wall 31 may be an arc 35 .

[0148] In some embodiments, the first wall 321 may be a first sub-side wall 322 , and the first wall 321 closes the opening 37 . There may be two first walls 321 , and a connector 40 may be disposed on one of the first walls 321 .

[0149] According to the technical solution of the embodiment of the present application, the third sub-side wall 324 is transitionally connected to the top wall 36 by the arc 35, and the first sub-side wall 322 closes the opening 37, that is, the surface connecting the first sub-side wall 322 and the third sub-side wall 324 and the surface connecting the first sub-side wall 322 and the top wall 36 are also transitionally connected by the arc 35, so that the connection at the corner is the arc 35, so that the connection between the first sub-side wall 322 and the second sub-box body 34 has better sealing, thereby improving the sealing of the box body 30.

[0150] Please refer to Figure 6 , Figure 6 This is a partial structural diagram of the first sub-sidewall in some embodiments of the present application. In some embodiments, the first sub-sidewall 322 includes an inner surface 3221 facing the second battery cell assembly 20, an outer surface 3222 facing away from the second battery cell assembly 20, and a connecting surface 3223 connecting the inner surface 3221 and the outer surface 3222. The connecting surface 3223 includes a first straight region 32231, a second straight region 32232, and a transition region 32233. The two ends of the transition region 32233 respectively connect the first straight region 32231 and the second straight region 32232. The first straight region 32231 is connected to the top wall 36, the second straight region 32232 is connected to the third sub-sidewall 324, and the transition region 32233 is connected to the arc 35 to close the opening 37.

[0151] In some embodiments, the thickness direction of the top wall 36 can be parallel to the gravity direction X, and the extension direction of the first straight region 32231 can be parallel to the extension direction of the top wall 36, so that the first straight region 32231 can be well-fitted and connected to the top wall 36. The third sub-sidewall 324 can extend along the gravity direction X, and the extension direction of the second straight region 32232 can be parallel to the extension direction of the third sub-sidewall 324, so that the second straight region 32232 can be well-fitted and connected to the third sub-sidewall 324.

[0152] In some embodiments, there may be two second straight regions 32232, each of which is connected to two third sub-sidewalls 324. Correspondingly, there may be two transition regions 32233, one of which connects one second straight region 32232 and one end of the first straight region 32231, and the other of which connects another second straight region 32232 and the other end of the first straight region 32231.

[0153] In some embodiments, the transition area 32233 can be connected to the arc 35 in a corresponding manner, thereby improving the sealing performance when the first sub-side wall 322 closes the opening 37 .

[0154] The technical solution of the embodiment of the present application is to connect the top wall 36 through the first straight area 32231, connect the third sub-side wall 324 through the second straight area 32232, and connect the arc 35 through the transition area 32233, so that the connection between the first sub-side wall 322 and the second sub-box body 34 has better sealing performance, further improving the sealing performance of the box body 30.

[0155] Please refer to Figure 3In some embodiments, the first sub-sidewall 322 includes a first portion 3212 and a second portion 3213. On a projection plane perpendicular to the first direction Y, the orthographic projection of the first portion 3212 at least partially overlaps with the orthographic projection of the first battery cell assembly 10, and the orthographic projection of the second portion 3213 at least partially overlaps with the orthographic projection of the second battery cell assembly 20. The connector 40 is disposed on the second portion 3213.

[0156] In some embodiments, with the first direction Y as the projection direction, the projection of the first portion 3212 may partially overlap or completely overlap with the projection of the first battery cell assembly 10 , and the projection of the second portion 3213 may partially overlap or completely overlap with the projection of the second battery cell assembly 20 .

[0157] In some embodiments, the first portion 3212 may enclose a portion of the first sub-box 33 in the first direction Y, and the second portion 3213 may enclose a portion of the second sub-box 34 in the first direction Y.

[0158] In some embodiments, the second portion 3213 can be located above the first portion 3212.

[0159] According to the technical solution of the embodiment of the present application, on the projection plane perpendicular to the first direction Y, the orthographic projection of the first part 3212 at least partially overlaps with the orthographic projection of the first battery cell assembly 10, and the orthographic projection of the second part 3213 at least partially overlaps with the orthographic projection of the second battery cell assembly 20, that is, the second part 3213 is located above the first part 3212, and the connector 40 is arranged in the second part 3213, that is, the connector 40 is arranged at a higher position, which reduces the risk of the connector 40 contacting the liquid and causing a short circuit, thereby improving the reliability of the battery device 1.

[0160] In some embodiments, the first portion 3212 and the second portion 3213 are integrally formed.

[0161] In some embodiments, the first sub-sidewall 322 may be a complete plate, the portion of the first sub-sidewall 322 corresponding to the first sub-box body 33 is the first portion 3212 , and the portion corresponding to the second sub-box body 34 is the second portion 3213 .

[0162] In the technical solution of the embodiment of the present application, the first part 3212 and the second part 3213 are integrally formed, which facilitates the processing and installation of the first wall 321.

[0163] An embodiment of the present application further provides an electrical device, comprising the battery device 1 according to any one of the above embodiments, wherein the battery device 1 is used to provide electrical energy to the electrical device.

[0164] Please refer to Figures 2 to 5In some embodiments, the battery device 1 includes a first battery cell assembly 10, a second battery cell assembly 20, a housing 30, a bracket 50, and a connector 40. The housing 30 includes a first sub-housing 33 and a second sub-housing 34. The first sub-housing 33 includes a bottom wall 31 and two second sub-side walls 323. The two second sub-side walls 323 are arranged opposite each other along the second direction Z, and the two second sub-side walls 323 are arranged at both ends of the bottom wall 31 in the second direction Z. The second sub-housing 34 includes a top wall 36 and two third sub-side walls 324. The two third sub-side walls 324 are arranged opposite each other along the second direction Z, and the two third sub-side walls 324 are arranged at both ends of the top wall 36 in the second direction Z.

[0165] The first sub-box 33 and the second sub-box 34 are interlocked with each other, the bottom wall 31 and the top wall 36 are arranged opposite to each other in the gravity direction X, and the end of the second sub-side wall 323 facing away from the bottom wall 31 is connected to the end of the third sub-side wall 324 facing away from the top wall 36. The first sub-box 33 and the second sub-box 34 form a box 30, and the box 30 has openings 37 at both ends in the first direction Y.

[0166] The bracket 50 is connected to the two second sub-side walls 323 to form a first accommodation space. The first battery cell assembly 10 is disposed in the first accommodation space, and the bottom wall 31 supports the first battery cell assembly 10.

[0167] The bracket 50 is connected to the two third sub-side walls 324 to form a second accommodation space. The second battery cell assembly 20 is disposed in the second accommodation space, and the bracket 50 supports the second battery cell assembly 20.

[0168] The housing 30 also includes two first sub-side walls 322, which enclose openings 37 at both ends of the housing 30 in the first direction Y. A connector 40 is disposed on the first sub-side walls 322, and its projection, projected in the first direction Y, at least partially overlaps with the projection of the second battery cell assembly 20. In other words, the connector 40 is positioned in correspondence with the second sub-housing 34, ensuring a greater distance from the bottom wall 31 in the direction of gravity X.

[0169] The technical solution of the embodiment of the present application places the first battery cell assembly 10 and the second battery cell assembly 20 within the same housing 30, thereby improving the space utilization of the battery device 1 and increasing the energy density of the battery device 1. Furthermore, when liquid appears within the housing 30, it will collect on the bottom wall 31 of the housing 30 due to gravity. Positioning the connector 40 higher reduces the risk of short circuits caused by contact between the connector 40 and the liquid, thereby improving the reliability of the battery device 1.

[0170] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A battery device, characterized in that: include: a first battery cell assembly and a second battery cell assembly, wherein the first battery cell assembly and the second battery cell assembly are arranged along the direction of gravity, and the second battery cell assembly is located above the first battery cell assembly; a box body, wherein the first battery cell assembly and the second battery cell assembly are disposed within the box body, the box body comprising a bottom wall and a side wall, the bottom wall being configured to support the first battery cell assembly, the side wall being disposed around the bottom wall, and one end of the side wall being connected to the bottom wall; A connector for charging and discharging the battery device; In which, the side wall includes a first wall, the first wall is located on one side of the first battery cell assembly and the second battery cell assembly in a first direction, the connector is arranged on the first wall, and on the projection plane perpendicular to the first direction, the orthographic projection of the connector at least partially overlaps with the orthographic projection of the second battery cell assembly, and the first direction is perpendicular to the direction of gravity.

2. The battery device according to claim 1, wherein: In the gravity direction, there is a distance D between the connector and the bottom wall, which satisfies: 160 mm ≤ D ≤ 500 mm.

3. The battery device according to claim 2, characterized in that 160mm≤D≤400mm.

4. The battery device according to claim 1, wherein: The first wall is provided with a through hole, and the connector includes a connector and a mounting plate, the connector is arranged on the mounting plate, the mounting plate is arranged on the first wall and closes the through hole to separate the interior of the box from the outside; the connector is passed through the through hole, one end of the connector is located inside the box to be electrically connected to the first battery cell assembly and the second battery cell assembly, and the other end of the connector is located outside the box for electrical connection to an external device.

5. The battery device according to claim 1, wherein: The box includes a first sub-box and a second sub-box, the first sub-box and the second sub-box are arranged opposite to each other along the direction of gravity, and the first sub-box and the second sub-box are buckled together; The battery device also includes a bracket, which is arranged in the box body. The first sub-box body and the bracket form a first accommodating space, and the first battery monomer assembly is accommodated in the first accommodating space. The second sub-box body and the bracket form a second accommodating space, and the second battery monomer assembly is accommodated in the second accommodating space.

6. The battery device according to claim 5, characterized in that The sidewalls include two first sub-sidewalls arranged opposite to each other along the first direction, two second sub-sidewalls arranged opposite to each other along the second direction, and two third sub-sidewalls arranged opposite to each other along the second direction, wherein the first direction, the second direction, and the direction of gravity are perpendicular to each other; The box body further includes a top wall, two second sub-side walls are arranged at both ends of the bottom wall in the second direction to form the first sub-box body, and two third sub-side walls are arranged at both ends of the top wall in the second direction to form the second sub-box body. The first sub-box body and the second sub-box body are buckled together and form openings at both ends in the first direction, and the two first sub-side walls respectively close the two openings. The first wall is the first sub-side wall.

7. The battery device according to claim 6, characterized in that A first flow channel is formed inside the bottom wall, and the first flow channel is used to accommodate a heat exchange medium; a second flow channel is formed inside the bracket, and the second flow channel is used to accommodate a heat exchange medium.

8. The battery device according to claim 7, characterized in that The battery device also includes a first water inlet joint, a first water outlet joint, a first water inlet branch pipe, and a first water outlet branch pipe. One end of the first water inlet joint is connected to the bracket and communicates with the second flow channel, the other end of the first water inlet joint is connected to the first water inlet branch pipe, one end of the first water outlet joint is connected to the bracket and communicates with the first flow channel, and the other end of the first water outlet joint is connected to the first water outlet branch pipe. The first water inlet branch pipe and the first water outlet branch pipe are arranged at intervals along the second direction. On the same projection plane perpendicular to the first direction, the orthographic projection of the connector is located between the orthographic projection of the first water inlet branch pipe and the orthographic projection of the first water outlet branch pipe.

9. The battery device according to claim 6, characterized in that The third sub-side wall is transitionally connected to the top wall in an arc shape.

10. The battery device according to claim 9, characterized in that The first sub-side wall includes an inner surface facing the second battery cell assembly, an outer surface facing away from the second battery cell assembly, and a connecting surface connecting the inner surface and the outer surface; The connecting surface includes a first straight area, a second straight area and a transition area, the two ends of the transition area are respectively connected to the first straight area and the second straight area, the first straight area is connected to the top wall, the second straight area is connected to the third sub-side wall, and the transition area is connected to the arc to close the opening.

11. The battery device according to claim 1, wherein: The first wall includes a first portion and a second portion, and on a projection plane perpendicular to the first direction, an orthographic projection of the first portion at least partially overlaps with an orthographic projection of the first battery cell assembly, and an orthographic projection of the second portion at least partially overlaps with an orthographic projection of the second battery cell assembly; The connector is disposed on the second portion.

12. The battery device according to claim 11, wherein: The first portion and the second portion are integrally formed.

13. An electrical device, characterized in that: The battery device comprises the battery device according to any one of claims 1 to 12, wherein the battery device is used to provide electrical energy to the electrical device.

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