Battery devices, energy storage devices and power consumption devices

Abstract

Embodiments of the present application provide a battery device, an energy storage device, and an electrical device. The battery device includes a housing, a battery cell assembly, a heat exchange assembly, and a connector. The housing includes a first wall. The battery cell assembly is disposed in the housing and supported by the first wall. The heat exchange assembly is disposed along the thickness direction of the first wall, and at least a portion of the heat exchange assembly is disposed between the first wall and the battery cell assembly, and the heat exchange assembly is used to adjust the temperature of the battery cell assembly. The connector connects the heat exchange assembly and the first wall, and on a projection plane perpendicular to the thickness direction of the first wall, the orthographic projection of the connector does not overlap with the orthographic projection of the battery cell assembly. The technical solution provided in the present application can improve the reliability of the battery device.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to 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. Summary of the invention

[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, which includes a housing, a battery cell assembly, a heat exchange assembly, and a connector. The housing includes a first wall. The battery cell assembly is disposed in the housing and supported by the first wall. Along the thickness direction of the first wall, at least a portion of the heat exchange assembly is disposed between the first wall and the battery cell assembly, and the heat exchange assembly is used to adjust the temperature of the battery cell assembly. The connector connects the heat exchange assembly and the first wall, and on a projection plane perpendicular to the thickness direction of the first wall, the orthographic projection of the connector does not overlap with the orthographic projection of the battery cell assembly.

[0007] In the technical solution of the embodiment of the present application, the charge and discharge performance of the battery device is related to the temperature. By setting a heat exchange assembly to adjust the temperature of the battery cell assembly, the battery device can have better charge and discharge performance and improve the reliability of the battery device. In addition, the connector and the battery cell assembly do not overlap, and the battery cell assembly and the heat exchange assembly and the heat exchange assembly and the first wall can be assembled at the same time, which is conducive to improving the assembly efficiency, thereby improving the production efficiency of the battery device.

[0008] In some embodiments, the battery cell assembly includes a plurality of battery cells arranged along a first direction, the connector is located on at least one side of the plurality of battery cells in the first direction, and the first direction is perpendicular to the thickness direction of the first wall.

[0009] The technical solution of the embodiment of the present application can reduce the risk of interference between the connector and the battery cell, thereby reducing the risk of damage to the battery cell, thereby improving the reliability of the battery device, and can simultaneously assemble the battery cell assembly and the heat exchange assembly, and the heat exchange assembly and the first wall, which is beneficial to improving the assembly efficiency, thereby facilitating improving the production efficiency of the battery device.

[0010] In some embodiments, the heat exchange assembly includes a first heat exchange member, a second heat exchange member and a plurality of third heat exchange members, the first heat exchange member and the second heat exchange member both extend along the second direction and are spaced apart along the first direction. The third heat exchange member extends along the first direction, the plurality of third heat exchange members are spaced apart along the second direction, and the two ends of the plurality of third heat exchange members in the first direction are connected to the first heat exchange member and the second heat exchange member, so that the first heat exchange member and the second heat exchange member are respectively connected to the interior of the plurality of third heat exchange members, and in the thickness direction of the first wall, the third heat exchange member is located between the first wall and the plurality of battery cells. The connecting member includes a first connecting member and a second connecting member, the first connecting member connects the first heat exchange member and the first wall to fix the first heat exchange member to the first wall, the second connecting member connects the second heat exchange member and the first wall to fix the second heat exchange member to the first wall, and the first direction, the second direction and the thickness direction of the first wall are perpendicular to each other.

[0011] The technical solution of the embodiment of the present application is to connect the two ends of multiple third heat exchangers respectively through the first heat exchanger and the second heat exchanger, so that the heat exchange medium flows from the first heat exchanger to the third heat exchanger, and then flows back to the first heat exchanger through the third heat exchanger after being collected at the second heat exchanger, so as to facilitate the circulation of the heat exchange medium in the third heat exchanger, so that the third heat exchanger has a better heat exchange effect, thereby facilitating the improvement of the temperature regulation effect of the third heat exchanger on the battery cell. At the same time, the third heat exchanger extends along the first direction, and multiple third heat exchangers are arranged at intervals along the second direction, which can increase the heat exchange area between the third heat exchanger and the multiple battery cells, and make the area where the third heat exchanger exchanges heat with the multiple battery cells more uniform, further facilitating the improvement of the temperature regulation effect of the third heat exchanger on the battery cell. In addition, the first heat exchanger and the first wall are connected by the first connecting member, and the second heat exchanger and the first wall are connected by the second connecting member, which is conducive to further improving the reliability of the connection between the heat exchange assembly and the first wall.

[0012] In some embodiments, a mounting beam is provided on the surface of the first wall facing the battery cell assembly, and the number of the mounting beams is two, and the two mounting beams include a first mounting beam and a second mounting beam, and the first mounting beam and the second mounting beam are arranged at intervals along the first direction. Each mounting beam includes a protrusion, and the protrusion of the first mounting beam is located on one side of the plurality of battery cells in the first direction, and the first heat exchanger is located on the side of the protrusion of the first mounting beam away from the plurality of battery cells. The protrusion of the second mounting beam is located on the other side of the plurality of battery cells in the first direction, and the second heat exchanger is located on the side of the protrusion of the second mounting beam away from the plurality of battery cells.

[0013] The technical solution of the embodiment of the present application is to reduce the risk of interference between the connecting member and the battery cell, thereby reducing the risk of damage to the battery cell, and further improving the reliability of the battery device by arranging the first heat exchanger on the side of the protrusion of the first mounting beam away from the multiple battery cells, and arranging the second heat exchanger on the side of the protrusion of the second mounting beam away from the multiple battery cells, and connecting the first heat exchanger and the first wall through a first connecting member, and connecting the second heat exchanger and the first wall through a second connecting member.

[0014] In some embodiments, each mounting beam includes a main body connected to the outer periphery of the protruding portion, the main body having a first surface facing away from the first wall, and the protruding portion protruding from the first surface. The first heat exchange member is disposed in the main body of the first mounting beam, and the first connecting member connects the first heat exchange member and the first wall. The second heat exchange member is disposed in the main body of the second mounting beam, and the second connecting member connects the second heat exchange member and the main body of the second mounting beam.

[0015] The technical solution of the embodiment of the present application connects the first heat exchange component and the first wall through a first connecting member, and connects the second heat exchange component and the main body of the second mounting beam through a second connecting member, thereby realizing the connection between the heat exchange component and the first wall, thereby facilitating improving the reliability of the connection between the heat exchange component and the first wall.

[0016] In some embodiments, the first connecting member includes a first section, a second section, and a third section connected in sequence, the first section and the third section extend along a first direction, and the first section and the third section are arranged in parallel, the second section connects the first section and the third section, the first section is connected to a side of the first heat exchange member facing away from the first wall in the thickness direction of the first wall, and the third section is connected to the first wall.

[0017] The technical solution of the embodiment of the present application connects the first section to the side of the first heat exchanger facing away from the first wall, so that the first section can be overlapped with the first heat exchanger, thereby helping to improve the reliability of the connection between the first section and the first heat exchanger, thereby helping to improve the reliability of the connection between the heat exchange assembly and the first wall.

[0018] In some embodiments, the battery device includes a mounting seat and a first fastener, wherein the mounting seat is disposed on a surface of the first wall facing the battery cell assembly. The third section is provided with a first mounting hole, the first mounting hole passes through two end surfaces of the third section in the thickness direction of the first wall, the mounting seat is provided with a second mounting hole corresponding to the first mounting hole, and the first fastener passes through the first mounting hole and is connected to the second mounting hole.

[0019] The technical solution of the embodiment of the present application connects the first mounting hole and the second mounting hole by a first fastener, thereby realizing that the first connecting member connects the heat exchange component and the first wall, which is beneficial to improving the convenience and reliability of the connection.

[0020] In some embodiments, a water inlet and a water outlet are provided on the side of the first heat exchange element facing away from the plurality of third heat exchange elements, and the heat exchange assembly includes a water inlet pipe and a water outlet pipe, one end of the water inlet pipe is connected to the water inlet, and one end of the water outlet pipe is connected to the water outlet.

[0021] The technical solution of the embodiment of the present application realizes the circulation of the heat exchange medium in the heat exchange component by setting the water inlet pipe and the water outlet pipe, so that the heat exchange component can have a better heat exchange effect, thereby facilitating the improvement of the temperature regulation effect of the heat exchange component on the battery cell. At the same time, the water inlet and the water outlet are set on the side of the first heat exchange component away from the plurality of third heat exchange components, and the water inlet pipe is connected to the water inlet, and the water outlet pipe is connected to the water outlet, which can reduce the risk of interference between the water inlet pipe and the water outlet pipe and the plurality of battery cells, thereby facilitating the improvement of the reliability of the battery device.

[0022] In some embodiments, the second connecting member includes a fourth section, a fifth section, and a sixth section connected in sequence, the fourth section and the sixth section extend along the second direction, and the fourth section and the sixth section are arranged in parallel, the fifth section connects the fourth section and the sixth section, the fourth section is connected to the side of the second heat exchanger away from the first wall in the thickness direction of the first wall, and the sixth section is connected to the main body of the second mounting beam.

[0023] The technical solution of the embodiment of the present application connects the fourth section to the side of the second heat exchanger away from the first wall, so that the fourth section can overlap the second heat exchanger, thereby facilitating the improvement of the reliability of the connection between the fourth section and the second heat exchanger, thereby facilitating the improvement of the reliability of the connection between the heat exchange assembly and the first wall. At the same time, by setting the fourth section and the sixth section to extend along the second direction, the space occupied by the second connection member in the first direction of the box can be reduced, thereby reducing the size of the box in the first direction, and further improving the space utilization of the battery device in the first direction.

[0024] In some embodiments, the battery device includes a second fastener. The sixth section is provided with a third mounting hole, the third mounting hole passes through two end surfaces of the sixth section in the thickness direction of the first wall, the main body of the second mounting beam is provided with a fourth mounting hole corresponding to the third mounting hole, and the second fastener passes through the third mounting hole and is connected to the fourth mounting hole.

[0025] The technical solution of the embodiment of the present application connects the third mounting hole and the fourth mounting hole through the second fastener, so that the second connecting member connects the heat exchange component and the first wall, which is beneficial to improving the convenience and reliability of the connection.

[0026] In some embodiments, the material of the first connecting member, the material of the second connecting member, the material of the mounting seat, and the material of the second mounting beam are all metal materials, the material of the first connecting member is different from the material of the mounting seat, and the material of the second connecting member is different from the material of the second mounting beam. The outer surface of the first fastener is provided with a first protective layer, and the outer surface of the second fastener is provided with a second protective layer, and the material of the first protective layer and the material of the second protective layer are both anti-potential corrosion materials.

[0027] According to the technical solution of the embodiment of the present application, the internal space of the box of the battery device is a high-pressure environment, the mounting seat and the first connecting piece are made of different metal materials, the second mounting beam and the second connecting piece are made of different metal materials, and a first protective layer of anti-potential corrosion material is provided on the outer surface of the first fastener, and a second protective layer of anti-potential corrosion material is provided on the outer surface of the second fastener, so that when the first fastener is connected to the first connecting piece and the mounting seat, the first connecting piece and the mounting seat can be connected at the same potential, and when the second fastener is connected to the second connecting piece and the second mounting beam, the second connecting piece and the second mounting beam can be connected at the same potential, thereby reducing the risk of potential corrosion between the first fastener and the second fastener, thereby reducing the risk of potential corrosion affecting the structural strength of the first fastener and the second fastener, thereby facilitating improving the reliability of the connection between the heat exchange component and the first wall.

[0028] In some embodiments, the first connecting member is provided with a third protective layer, and the third protective layer is arranged between the first connecting member and the first fastener. The second connecting member is provided with a fourth protective layer, and the fourth protective layer is arranged between the second connecting member and the second fastener. The material of the third protective layer and the material of the fourth protective layer are both anti-potential corrosion materials.

[0029] The technical solution of the embodiment of the present application reduces the risk of potential corrosion between the first connecting member and the second connecting member, thereby reducing the risk of potential corrosion affecting the structural strength of the first connecting member and the second connecting member due to potential corrosion, thereby facilitating improving the reliability of the connection between the heat exchange component and the first wall.

[0030] In some embodiments, the battery cell assembly includes a first end plate and a second end plate, the first end plate and the second end plate are respectively connected to both sides of the plurality of battery cells in a first direction. The first end plate is connected to the protrusion of the first mounting beam, and the second end plate is connected to the protrusion of the second mounting beam.

[0031] The technical solution of the embodiment of the present application is to facilitate the arrangement of multiple battery cells by connecting the first end plate and the second end plate to the two sides of multiple battery cells in the first direction respectively. In addition, the protrusion of the first mounting beam is connected to the first end plate, and the protrusion of the second mounting beam is connected to the second end plate, so as to facilitate the reliability of the installation of the battery cell assembly.

[0032] In some embodiments, the protrusion is a hollow structure, a first opening is formed on the side of the protrusion facing the first wall, the first wall closes the first opening, and forms a cavity with the protrusion. The battery device includes a third fastener and a fourth fastener, the first end plate is arranged on the protrusion of the first mounting beam at one end away from the first wall in the thickness direction of the first wall, the third fastener connects the first end plate and the protrusion of the first mounting beam, and one end of the third fastener is arranged in the cavity of the first mounting beam. The second end plate is arranged on the protrusion of the second mounting beam at one end away from the first wall in the thickness direction of the first wall, the fourth fastener connects the second end plate and the protrusion of the second mounting beam, and one end of the fourth fastener is arranged in the cavity of the second mounting beam.

[0033] The technical solution of the embodiment of the present application is to form a cavity by the protrusion and the first wall, and set the first end plate at the end of the protrusion of the first mounting beam away from the first wall in the thickness direction of the first wall, and set the second end plate at the end of the protrusion of the second mounting beam away from the first wall in the thickness direction of the first wall, so that the cavity can provide an accommodating space, so that when the third fastener connects the first end plate and the protrusion of the first mounting beam and the fourth fastener connects the second end plate and the protrusion of the second mounting beam, a part of the third fastener can extend into the cavity of the first mounting beam, and the fourth fastener can extend into the cavity of the second mounting beam, thereby providing installation space for the third fastener and the fourth fastener, which is beneficial to improving the convenience of installing the first end plate and the second end plate.

[0034] In some embodiments, the protrusion has multiple first grooves, the multiple first grooves are arranged at intervals along the second direction, the first grooves penetrate the protrusion along the first direction, at least part of the third heat exchange element is arranged in the first groove, and at least one third heat exchange element is arranged in a first groove.

[0035] The technical solution of the embodiment of the present application can reduce the space occupied by the third heat exchanger and the protrusion in the thickness direction of the first wall by arranging the third heat exchanger in the groove portion, thereby saving space, and at the same time enabling the third heat exchanger to pass through the protrusion in the first direction, so that the first heat exchanger can be arranged on the side of the protrusion of the first mounting beam away from the multiple battery cells, and the second heat exchanger can be arranged on the side of the protrusion of the second mounting beam away from the multiple battery cells, so as to facilitate the first heat exchanger and the second heat exchanger to be respectively connected to the third heat exchanger.

[0036] In some embodiments, the surface of the first wall facing the battery cell assembly includes a first portion and a second portion, the first portion is provided with a second groove, at least a portion of the third heat exchange element is disposed in the second groove, and the second portion is connected to a plurality of battery cells.

[0037] The technical solution of the embodiment of the present application is to set a second groove portion in the first part of the first wall and set the third heat exchange element in the second groove portion, thereby reducing the risk of interference between the third heat exchange element and multiple battery cells, thereby reducing the risk of damage to the battery cells, and thus improving the reliability of the battery device.

[0038] In some embodiments, the battery device includes an adhesive layer, and in the thickness direction of the first wall, the adhesive layer connects the plurality of battery cells and the second portion. The battery device includes a filler, and the filler is disposed between the third heat exchange member and the inner wall of the second groove portion.

[0039] The technical solution of the embodiment of the present application can help improve the reliability of the battery monomers being arranged on the first wall by setting an adhesive layer to connect multiple battery cells and the second part of the first wall. At the same time, the adhesive layer has a certain fluidity. By setting the filler between the third heat exchange member and the second groove portion, the probability of the adhesive layer flowing to the second groove portion can be reduced, thereby reducing the risk of the adhesive layer running off and causing the reliability of the battery monomers being bonded to the second part to be reduced, which further helps improve the reliability of the battery monomers being arranged on the first wall.

[0040] In some embodiments, the box body includes a bottom wall, side walls and a box cover, the bottom wall and the box cover are arranged opposite to each other, one end of the side wall is arranged around the outer periphery of the bottom wall, and the other end forms an opening, and the box cover closes the opening, the bottom wall, the side wall and the box cover jointly define a accommodating cavity for accommodating the battery cell assembly, and the bottom wall is the first wall.

[0041] The technical solution of the embodiment of the present application defines a housing cavity for accommodating a battery cell assembly by means of the bottom wall, the side wall and the box cover, which can reduce the risk of damage to the battery cell assembly, thereby improving the reliability of the battery device. At the same time, by providing a connector to connect the heat exchange assembly and the bottom wall of the box, the reliability of the installation of the heat exchange assembly can be improved.

[0042] In a second aspect, an embodiment of the present application further provides an energy storage device, comprising a battery device as in any one of the embodiments of the first aspect.

[0043] In a third aspect, an embodiment of the present application further provides an electrical device, comprising a battery device as in any one of the embodiments of the first aspect, the battery device being used to provide electrical energy to the electrical device.

[0044] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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 related drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0047] Figure 2 A schematic diagram of the structural decomposition of a battery device provided in some embodiments of the present application;

[0048] Figure 3 A schematic diagram of the internal structure of a battery device provided in some embodiments of the present application;

[0049] Figure 4 A schematic diagram of a battery cell assembly provided for some embodiments of the present application;

[0050] Figure 5 Schematic diagram of the internal structure of a battery device provided in some other embodiments of the present application;

[0051] Figure 6 A schematic diagram of the structure of a heat exchange assembly provided in some embodiments of the present application;

[0052] Figure 7 A schematic diagram of a first connecting member connecting a mounting seat and a first heat exchange member provided in some embodiments of the present application;

[0053] Figure 8 A schematic diagram of the internal structure of a battery device provided in some other embodiments of the present application;

[0054] Fig. 9 is a structural schematic diagram of a first connecting member;

[0055] Fig.10 is a schematic structural diagram of a second connecting member;

[0056] Fig.11 A schematic diagram of a second connecting member connecting a first wall and a second heat exchange member provided in some embodiments of the present application.

[0057] Icons: 1-battery device; 10-box; 11-first wall; 111-mounting beam; 1111-first mounting beam; 1112-second mounting beam; 1113-protrusion; 1113a-first groove; 1114-main body; 1114a-first surface; 1114b-fourth mounting hole; 1115-cavity; 113-first part; 1131-second groove; 114-second part; 12-second wall; 13-mounting cavity; 14-bottom wall; 15-side wall; 16-box cover; 17-first sub-box; 18-second sub-box; 20-battery monomer assembly; 21-battery monomer; 22-first end plate; 23-second end plate; 30-heat exchange assembly; 31-first heat exchange element; 311-water inlet; 312-water outlet; 32-second heat exchange element; 3 3-third heat exchange member; 34-water inlet pipe; 35-water outlet pipe; 40-connecting member; 41-first connecting member; 411-first section; 412-second section; 413-third section; 4131-first mounting hole; 414-third protective layer; 42-second connecting member; 421-fourth section; 422-fifth section; 423-sixth section; 4231-third mounting hole; 424-fourth protective layer; 50-mounting seat; 51-second mounting hole; 60-first fastener; 61-first protective layer; 62-second fastener; 63-second protective layer; 64-third fastener; 65-fourth fastener; 70-adhesive layer; 80-filling member; 100-vehicle; 110-controller; 120-motor; X-first direction; Y-second direction; Z-thickness direction of the first wall. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0059] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; 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" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. 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 and secondary relationship.

[0060] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0061] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0063] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0064] 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, in parallel or in mixed connection through a busbar component.

[0065] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, a battery cell assembly may be a battery module, and a battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, a battery module may be formed by bundling a plurality of battery cells with a cable tie.

[0066] 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 accommodated in the case.

[0067] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0068] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0069] As an example, the box may include a first sub-box and a second sub-box. The first sub-box and the second sub-box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first sub-box can be a top cover or a bottom plate.

[0070] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0071] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0072] In some embodiments, the battery device refers to an energy storage device, which includes a box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0073] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0074] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0075] At present, from the perspective of market development, batteries have been widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as electric tools, drones, energy storage equipment, etc. With the continuous expansion of battery application areas, the market demand is also constantly expanding.

[0076] The development of battery technology must take into account many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, as environmental conditions and / or internal conditions of the battery change, the reliability of the battery device is also one of the key factors to consider.

[0077] At present, a battery cell assembly is contained in a box to form a battery device. The charge and discharge performance of the battery cell assembly is related to the temperature. In order to make the battery device have better charge and discharge performance, a heat exchange assembly is provided in the box to adjust the temperature of the battery cell assembly.

[0078] Usually, the heat exchange assembly and the housing are two independent components. During the assembly of the battery device, the heat exchange assembly needs to be installed in the housing, and then the battery cell assembly needs to be placed in the housing. The two steps take a long time and the production efficiency is low.

[0079] Based on the above considerations, in order to solve the problem that the installation efficiency of the heat exchange assembly and the battery cell assembly is low, thereby affecting the production efficiency of the battery device, an embodiment of the present application provides a battery device, the battery device includes a box, a battery cell assembly, a heat exchange assembly and a connector. The box includes a first wall. The battery cell assembly is arranged in the box and supported by the first wall. Along the thickness direction of the first wall, at least part of the heat exchange assembly is arranged between the first wall and the battery cell assembly, and the heat exchange assembly is used to adjust the temperature of the battery cell assembly. The connector connects the heat exchange assembly and the first wall, and on the projection plane perpendicular to the thickness direction of the first wall, the orthographic projection of the connector does not overlap with the orthographic projection of the battery cell assembly.

[0080] By setting a heat exchange assembly to adjust the temperature of the battery cell assembly, the battery device can have better charging and discharging performance and improve the reliability of the battery device. In addition, the connector and the battery cell assembly do not overlap, so the battery cell assembly and the heat exchange assembly, and the heat exchange assembly and the first wall can be assembled at the same time, which is conducive to improving the assembly efficiency, thereby improving the production efficiency of the battery device.

[0081] The battery device disclosed in the embodiment of the present application can be used in, but is not limited to, electrical equipment such as vehicles, ships, or aircraft. The battery device disclosed in the present application can also be used to form a power supply system for the electrical equipment.

[0082] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0083] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle 100 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 1 is provided inside the vehicle 100, and the battery device 1 may be provided at the bottom, head or tail of the vehicle 100. The battery device 1 may be used to power the vehicle 100. For example, the battery device 1 may be used as an operating power source for the vehicle 100, 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.

[0084] The vehicle 100 may further include a controller 110 and a motor 120 , wherein 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 .

[0085] In some embodiments of the present application, the battery device 1 can not only serve as an operating power source for the vehicle 100 , but also serve 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 .

[0086] Please refer to Figure 2 , Figure 2 A schematic diagram of the structure of a battery device provided in some embodiments of the present application. The battery device 1 includes a box 10 and a battery cell assembly 20, and the battery cell assembly 20 is accommodated in the box 10. Among them, the box 10 is used to provide a storage space for the battery cell assembly 20, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first sub-box 17 and a second sub-box 18, and the first sub-box 17 and the second sub-box 18 cover each other, and the first sub-box 17 and the second sub-box 18 jointly define a storage space for accommodating the battery cell assembly 20. The second sub-box 18 can be a hollow structure with one end open, and the first sub-box 17 can be a plate-like structure. The first sub-box 17 covers the open side of the second sub-box 18, so that the first sub-box 17 and the second sub-box 18 jointly define a storage space; the first sub-box 17 and the second sub-box 18 can also be hollow structures with one side open, and the open side of the first sub-box 17 covers the open side of the second sub-box 18.

[0087] In the battery device 1, the battery cell assembly 20 may include a plurality of battery cells 21, and the plurality of battery cells 21 may be connected in series, in parallel, or in a mixed connection. The mixed connection means that the plurality of battery cells 21 are both connected in series and in parallel. The plurality of battery cells 21 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the plurality of battery cells 21 is accommodated in the box 10; of course, the battery device 1 may also be a battery module formed by first connecting the plurality of battery cells 21 in series, in parallel, or in a mixed connection, and then the plurality of battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and then accommodated in the box 10. The battery device 1 may also include other structures, for example, the battery device 1 may also include a busbar component for realizing electrical connection between the plurality of battery cells 21.

[0088] The battery cell 21 may be a secondary battery or a primary battery; the battery cell 21 may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.

[0089] Please refer to Figure 2 , and refer to Figure 3 , Figure 3 A schematic diagram of the internal structure of a battery device provided in some embodiments of the present application, wherein: Figure 3 Part of the box wall of the box is hidden in order to show the internal structure of the battery device. The embodiment of the present application provides a battery device 1, which includes a box 10, a battery cell assembly 20, a heat exchange assembly 30 and a connector 40. The box 10 includes a first wall 11. The battery cell assembly 20 is arranged in the box 10 and supported by the first wall 11. Along the thickness direction Z of the first wall, at least part of the heat exchange assembly 30 is arranged between the first wall 11 and the battery cell assembly 20, and the heat exchange assembly 30 is used to adjust the temperature of the battery cell assembly 20. The connector 40 connects the heat exchange assembly 30 and the first wall 11, and on the projection plane perpendicular to the thickness direction Z of the first wall, the orthographic projection of the connector 40 does not overlap with the orthographic projection of the battery cell assembly 20.

[0090] In some embodiments, the material of the box body 10 may be steel, and the box body 10 may be formed by welding several box walls. Since the hardness of steel is relatively high, it is difficult to form a heat exchange flow channel by extrusion molding inside the box wall. Therefore, the heat exchange assembly 30 formed independently from the box body 10 is arranged in the box body 10 to achieve temperature regulation of the battery cell assembly 20, thereby facilitating the improvement of the charging and discharging performance of the battery device 1, and further facilitating the improvement of the reliability of the battery device 1.

[0091] In some embodiments, the heat exchange assembly 30 may have a flow channel inside for accommodating a heat exchange medium. The heat exchange medium may be a heating medium. When the temperature of the battery cell assembly 20 is low, the heating medium exchanges heat with the battery cell assembly 20 to heat the battery cell assembly 20. The heat exchange medium may be a cooling medium. When the temperature of the battery cell assembly 20 is high, the cooling medium exchanges heat with the battery cell assembly 20 to cool the battery cell assembly 20.

[0092] The heat exchange medium may be liquid, solid or gas.

[0093] In some embodiments, the connector 40 may be in the form of a sheet or a plate, one end of the connector 40 may be connected to the heat exchange assembly 30, and the connector 40 and the heat exchange assembly 30 may be connected by welding, and the welding position does not overlap with the flow channel; the other end of the connector 40 may be connected to the housing 10, and the connection method may be welding, or bolt connection, etc., so as to realize the integration of the heat exchange assembly 30 on the housing 10, which is convenient for the installation of the heat exchange assembly 30. It should be noted that the connection between the connector 40 and the housing 10 may be a direct connection, or an indirect connection through other components connected to the housing 10.

[0094] In some embodiments, the box 10 may include a first wall 11, and the first wall 11 supports the battery cell assembly 20. The first wall 11 may be the bottom wall 14 of the box 10, that is, when the battery device 1 is installed in an electrical device, the first wall 11 may be the bottom wall of the box 10.

[0095] In some embodiments, the thickness direction of the first wall can be represented by the direction indicated by the letter Z in the figure.

[0096] In some embodiments, the thickness direction Z of the first wall may be parallel to the gravity direction, and the thickness direction Z of the first wall may be the height direction of the battery device 1 .

[0097] In some embodiments, a portion of the heat exchange assembly 30 may be disposed between the first wall 11 and the battery cell assembly 20, wherein the heat exchange assembly 30 may be disposed on the first wall 11 and support the battery cell assembly 20 through the heat exchange assembly 30. A portion of the heat exchange assembly 30 may contact the lower surface of the battery cell assembly 20 to facilitate heat exchange between the heat exchange medium in the heat exchange assembly 30 and the battery cell assembly 20.

[0098] In some embodiments, the heat exchange assembly 30 may be entirely located between the first wall 11 and the battery cell assembly 20 .

[0099] In some embodiments, with the thickness direction Z of the first wall as the projection direction, the heat exchange assembly 30 and the battery cell assembly 20 are projected onto a projection plane perpendicular to the thickness direction Z of the first wall, a portion of the orthographic projection of the heat exchange assembly 30 overlaps with at least a portion of the orthographic projection of the battery cell assembly 20, which may be located between the first wall 11 and the battery cell assembly 20, and another portion of the orthographic projection of the heat exchange assembly 30 does not overlap with the orthographic projection of the battery cell assembly 20.

[0100] In some embodiments, the heat exchange assembly 30 may include two parts, one part is used for heat exchange with the battery cell assembly 20, and the other part is used for communicating with the outside world, so as to input the heat exchange medium from the outside world into the heat exchange assembly 30, and output the heat exchange medium from the heat exchange assembly 30 to the outside world after heat exchange, thereby realizing the circulation of the heat exchange medium. In the thickness direction Z of the first wall, the part of the heat exchange assembly 30 used for heat exchange with the battery cell assembly 20 may be located between the first wall 11 and the battery cell assembly 20.

[0101] In some embodiments, the thickness direction Z of the first wall is used as the projection direction, and the connector 40 and the battery cell assembly 20 are projected on a projection plane perpendicular to the thickness direction Z of the first wall, and the orthographic projection of the connector 40 does not overlap with the orthographic projection of the battery cell assembly 20. The connector 40 may be disposed on another part of the heat exchange assembly 30, and the thickness direction Z of the first wall is used as the projection direction, and the heat exchange assembly 30 and the battery cell assembly 20 are projected on a projection plane perpendicular to the thickness direction Z of the first wall, and the other part of the orthographic projection of the heat exchange assembly 30 does not overlap with the orthographic projection of the battery cell assembly 20. The connector does not overlap with the battery cell assembly, and the battery cell assembly and the heat exchange assembly, and the heat exchange assembly and the first wall can be assembled at the same time.

[0102] According to the technical solution of the embodiment of the present application, the charge and discharge performance of the battery device 1 is related to the temperature. By setting the heat exchange assembly 30 to adjust the temperature of the battery cell assembly 20, the battery device 1 can have better charge and discharge performance and improve the reliability of the battery device 1. In addition, the connector 40 does not overlap with the battery cell assembly 20, so the battery cell assembly 20 and the heat exchange assembly 30 can be assembled, and the heat exchange assembly 30 and the first wall 11 can be assembled at the same time, which is conducive to improving the assembly efficiency, thereby improving the production efficiency of the battery device 1.

[0103] Please refer to Figure 3 , and refer to Figure 4 , Figure 4 Schematic diagram of a battery cell assembly provided for some embodiments of the present application. In some embodiments, the battery cell assembly 20 includes a plurality of battery cells 21 arranged along a first direction X, and the connector 40 is located on at least one side of the plurality of battery cells 21 in the first direction X.

[0104] In some embodiments, the first direction may be represented by the direction indicated by the letter X in the figure.

[0105] In some embodiments, the first direction X may be a length direction of the battery device 1 .

[0106] In some embodiments, the first direction X may be perpendicular to the thickness direction Z of the first wall.

[0107] In some embodiments, the plurality of battery cells 21 are arranged along the first direction X, and the plurality of battery cells 21 may be wrapped around the outer circumferences of the plurality of battery cells 21 by a binding member to fix the plurality of battery cells 21 .

[0108] Alternatively, an end plate may be provided on one side of the plurality of battery cells 21 in the first direction X, and the plurality of battery cells 21 may be fixed by a binding. Alternatively, two end plates may be provided on both sides of the plurality of battery cells 21 in the first direction X, and the plurality of battery cells 21 may be fixed by a binding. The plurality of battery cells 21 may also be fixed by providing two mounting beams on the first wall 11 of the box body 10, and the mounting beams contact both sides of the plurality of battery cells 21 in the first direction X, so as to clamp the plurality of battery cells 21.

[0109] In some embodiments, the connector 40 may be located at one side of the plurality of battery cells 21 in the first direction X.

[0110] In some embodiments, the number of the connectors 40 may be at least two, and the at least two connectors 40 are respectively located on both sides of the plurality of battery cells 21 in the first direction X.

[0111] In some embodiments, with the thickness direction Z of the first wall as the projection direction, the connector 40 and the multiple battery cells 21 are projected onto a projection plane perpendicular to the thickness direction Z of the first wall. The orthographic projection of the connector 40 can be located on one side of the orthographic projection of the multiple battery cells 21 on the first direction X, or the orthographic projections of the two connectors 40 can be located on both sides of the orthographic projection of the multiple battery cells 21 on the first direction X.

[0112] It should be noted that the orthographic projection of the connector 40 does not overlap with the orthographic projections of the plurality of battery cells 21 .

[0113] In some embodiments, the number of the connector 40 may be one, and the connector 40 is located at one side of the plurality of battery cells 21 in the first direction X.

[0114] In some embodiments, the number of the connectors 40 may be two, and the two connectors 40 are respectively located on two sides of the plurality of battery cells 21 in the first direction X.

[0115] In some embodiments, the number of the connectors 40 may be more than two, a portion of the connectors 40 is located on one side of the plurality of battery cells 21 in the first direction X, and another portion of the connectors 40 is located on the other side of the plurality of battery cells 21 in the first direction X. The connectors 40 located on the same side may be one or more, and the multiple connectors 40 may be arranged at intervals.

[0116] The technical solution of the embodiment of the present application can reduce the risk of interference between the connector 40 and the battery cell 21 by arranging the connector 40 on one side of the plurality of battery cells 21 in the first direction X, thereby reducing the risk of damage to the battery cell 21, thereby improving the reliability of the battery device 1, and can simultaneously assemble the battery cell assembly 20 and the heat exchange assembly 30, and assemble the heat exchange assembly 30 and the first wall 11, which is beneficial to improving the assembly efficiency, thereby facilitating improving the production efficiency of the battery device 1.

[0117] Please refer to Figure 3 , and refer to Figure 5 and Figure 6 , Figure 5 Schematic diagram of the internal structure of a battery device provided in some other embodiments of the present application, wherein Figure 5 Part of the box wall and battery monomer components are hidden in the Figure 6 A schematic diagram of the structure of a heat exchange assembly provided for some embodiments of the present application. In some embodiments, the heat exchange assembly 30 includes a first heat exchange member 31, a second heat exchange member 32 and a plurality of third heat exchange members 33, the first heat exchange member 31 and the second heat exchange member 32 both extend along the second direction Y and are arranged at intervals along the first direction X, the third heat exchange member 33 extends along the first direction X, and the plurality of third heat exchange members 33 are arranged at intervals along the second direction Y, and the two ends of the plurality of third heat exchange members 33 in the first direction X are respectively connected to the first heat exchange member 31 and the second heat exchange member 32, so that the first heat exchange member 31 and the second heat exchange member 32 are respectively connected to the interior of the plurality of third heat exchange members 33, and in the thickness direction Z of the first wall, the third heat exchange member 33 is located between the first wall 11 and the battery cell assembly 20. The connector 40 includes a first connector 41 and a second connector 42, and the first connector 41 connects the first heat exchange member 31 and the first wall 11 to fix the first heat exchange member 31 to the first wall 11. The second connecting member 42 connects the second heat exchange member 32 and the first wall 11, and fixes the second heat exchange member 32 to the first wall 11. The first direction X, the second direction Y, and the thickness direction Z of the first wall are perpendicular to each other.

[0118] In some embodiments, the second direction may be represented by the direction indicated by the letter Y in the figure.

[0119] In some embodiments, the second direction Y may be a width direction of the battery device.

[0120] In some embodiments, the first heat exchange element 31 may be a heat exchange tube, a heat exchange plate, etc., and a first flow channel for accommodating a heat exchange medium is provided inside the first heat exchange element 31 .

[0121] In some embodiments, the second heat exchange element 32 may be a heat exchange tube, a heat exchange plate, etc., and a flow channel for accommodating a heat exchange medium is provided inside the second heat exchange element 32 .

[0122] In some embodiments, the third heat exchange element 33 may be a heat exchange tube, a heat exchange plate, etc., and a second flow channel for accommodating a heat exchange medium is provided inside the third heat exchange element 33 .

[0123] It should be noted that the outer surface of the heat exchange plate is relatively flat, and the heat exchange tube has a good confluence capacity. In some embodiments, the first heat exchange element 31 and the second heat exchange element 32 can be heat exchange tubes, and the first heat exchange element 31 can be provided with a water inlet 311 and a water outlet 312, so as to better transport the heat exchange medium to the third heat exchange element 33. The third heat exchange element 33 can be a heat exchange plate, and the third heat exchange element 33 is located between the first wall 11 and the battery cell assembly 20, so that the third heat exchange element 33 can better contact with the battery cell assembly 20.

[0124] In some embodiments, the structure of the second heat exchange element 32 may be the same as that of the first heat exchange element 31. It should be noted that the second heat exchange element 32 may not have the water inlet 311 and the water outlet 312.

[0125] In some embodiments, the first heat exchange element 31 may have a water inlet 311, and the second heat exchange element 32 may have a water outlet 312, so that the heat exchange medium can be transported from the first heat exchange element 31 to the third heat exchange element 33 and output from the second heat exchange element 32 to realize the circulation of the heat exchange medium.

[0126] In some embodiments, the first heat exchange element 31 may have a water outlet 312, and the second heat exchange element 32 may have a water inlet 311, so that the heat exchange medium can be transported from the second heat exchange element 32 to the third heat exchange element 33 and output from the first heat exchange element 31 to realize the circulation of the heat exchange medium.

[0127] In some embodiments, a first flow channel may be formed inside the first heat exchange element 31 , a second flow channel may be formed inside the second heat exchange element 32 , and a third flow channel may be formed inside the third heat exchange element 33 .

[0128] In some embodiments, one end of the third heat exchange element 33 in the first direction X may be connected to the first heat exchange element 31 , so that the third flow channel of the third heat exchange element 33 is in communication with the first flow channel of the first heat exchange element 31 .

[0129] In some embodiments, the other end of the third heat exchange element 33 in the first direction X may be connected to the second heat exchange element 32 , so that the third flow channel of the third heat exchange element 33 is in communication with the second flow channel of the second heat exchange element 32 .

[0130] In some embodiments, the first flow channel of the first heat exchanger 31 may be a hollow flow channel formed by splicing various plates of the first heat exchanger 31, or may be formed by integral extrusion when the first heat exchanger 31 is formed.

[0131] In some embodiments, the second flow channel of the second heat exchanger 32 may be a hollow flow channel formed by splicing various plates of the second heat exchanger 32, or may be formed by integral extrusion when the second heat exchanger 32 is formed.

[0132] In some embodiments, the third flow channel of the third heat exchange element 33 may be a hollow flow channel formed by splicing various plates of the third heat exchange element 33, or may be formed by integral extrusion when the third heat exchange element 33 is formed.

[0133] In some embodiments, in the first direction X, the surface of the first heat exchange element 31 facing the multiple battery cells 21 can be connected to the third heat exchange element 33, and the surface of the first heat exchange element 31 facing away from the multiple battery cells 21 can be provided with a water inlet 311 and a water outlet 312 to facilitate the connection of the first heat exchange element 31 with the outside world.

[0134] In some embodiments, the water inlet 311 and the water outlet 312 may be spaced apart along the second direction Y.

[0135] In some embodiments, the water inlet 311 may be disposed at one end of the first heat exchange element 31 in the second direction Y, and the water outlet 312 may be disposed at the other end of the first heat exchange element 31 in the second direction Y.

[0136] The heat exchange medium is transported to the first flow channel of the first heat exchange element 31 through the water inlet 311, and the first flow channel of the first heat exchange element 31 flows the heat exchange medium from the end of the third heat exchange element 33 close to the first heat exchange element 31 into the third flow channel of the third heat exchange element 33. The heat exchange medium flows along the first direction X to the end of the third heat exchange element 33 away from the first heat exchange element 31, and flows from the end of the third heat exchange element 33 away from the first heat exchange element 31 to the second flow channel of the second heat exchange element 32, and flows back in the second flow channel of the second heat exchange element 32 to the end of the third heat exchange element 33 close to the first heat exchange element 31, and then flows out through the water outlet 312, thereby realizing heat exchange with multiple battery cells 21 and circulation of the heat exchange medium.

[0137] In some embodiments, the plurality of third heat exchange members 33 may be disposed at intervals along the second direction Y, so that the plurality of third heat exchange members 33 can contact lower surfaces of the plurality of battery cells 21 in the second direction Y.

[0138] In some embodiments, the structures and sizes of the plurality of third heat exchange elements 33 may be the same or different.

[0139] In some embodiments, the size of the third heat exchange member 33 in the first direction X may be greater than the size of the multiple battery cells 21 in the first direction X. The two ends of the third heat exchange member 33 in the first direction X respectively exceed the two ends of the multiple battery cells 21 in the first direction X, that is, in the first direction X, the distance between the end of the third heat exchange member 33 facing the first heat exchange member 31 and the end of the multiple battery cells 21 away from the first heat exchange member 31 is greater than the size of the multiple battery cells 21 in the first direction X; the distance between the end of the third heat exchange member 33 away from the first heat exchange member 31 and the end of the multiple battery cells 21 facing the first heat exchange member 31 is greater than the size of the multiple battery cells 21 in the first direction X, so that the third heat exchange member 33 can cover the area of ​​the multiple battery cells 21 in the first direction X, which is conducive to improving the heat exchange effect.

[0140] The technical solution of the embodiment of the present application is to connect the two ends of the plurality of third heat exchangers 33 through the first heat exchanger 31 and the second heat exchanger 32 respectively, so that the heat exchange medium flows from the first heat exchanger 31 to the third heat exchanger 33, and then flows back to the first heat exchanger 31 through the third heat exchanger 33 after being collected at the second heat exchanger 32, so as to facilitate the circulation of the heat exchange medium in the third heat exchanger 33, so that the third heat exchanger 33 has a better heat exchange effect, thereby facilitating the improvement of the temperature regulation effect of the third heat exchanger 33 on the battery cell 21. At the same time, the third heat exchanger 33 extends along the first direction X, and the plurality of third heat exchangers 33 are arranged at intervals along the second direction Y, so that the heat exchange area between the third heat exchanger 33 and the plurality of battery cells 21 is increased, and the area for heat exchange between the third heat exchanger 33 and the plurality of battery cells 21 is relatively uniform, which further facilitates the improvement of the temperature regulation effect of the third heat exchanger 33 on the battery cell 21. In addition, the first heat exchanger 31 and the first wall 11 are connected by the first connecting member 41, and the second heat exchanger 32 and the first wall 11 are connected by the second connecting member 42, which is conducive to further improving the reliability of the connection between the heat exchange assembly 30 and the first wall 11.

[0141] Please refer to Figure 5 , and refer to Figure 7 and Fig.11 , Figure 7 A schematic diagram of a first connecting member connecting a mounting seat and a first heat exchange member provided in some embodiments of the present application, Fig.11Schematic diagram of a second connecting member connecting a first wall and a second heat exchange member provided in some embodiments of the present application. In some embodiments, a mounting beam 111 is provided on the surface of the first wall 11 facing the battery cell assembly 20, and the number of the mounting beams 111 is two, and the two mounting beams 111 include a first mounting beam 1111 and a second mounting beam 1112, and the first mounting beam 1111 and the second mounting beam 1112 are arranged at intervals along the first direction X. Each mounting beam 111 includes a protrusion 1113, and the protrusion 1113 of the first mounting beam 1111 is located on one side of the plurality of battery cells 21 in the first direction X, and the first heat exchange member 31 is located on the side of the protrusion 1113 of the first mounting beam 1111 away from the plurality of battery cells 21. The protrusion 1113 of the second mounting beam 1112 is located on the other side of the plurality of battery cells 21 in the first direction X, and the second heat exchange member 32 is located on the other side of the protrusion 1113 of the second mounting beam 1112 away from the plurality of battery cells 21.

[0142] In some embodiments, the first heat exchange member 31 may be located on a side of the plurality of battery cells 21 away from the second heat exchange member 32 and disposed on the first mounting beam 1111 , and the first connecting member 41 connects the first heat exchange member 31 and the first mounting beam 1111 .

[0143] The second heat exchange member 32 may be located on a side of the plurality of battery cells 21 away from the first heat exchange member 31 and disposed on the second mounting beam 1112 , and the second connecting member 42 connects the second heat exchange member 32 and the second mounting beam 1112 .

[0144] In some embodiments, in the thickness direction Z of the first wall, the surface of the first wall 11 facing the battery cell assembly 20 is provided with a first mounting beam 1111 and a second mounting beam 1112. It should be noted that the structures of the first mounting beam 1111 and the second mounting beam 1112 of this embodiment may be the same.

[0145] In some embodiments, the structures and arrangements of the first mounting beam 1111 and the second mounting beam 1112 may be the same or different.

[0146] In some embodiments, the first mounting beam 1111 and the second mounting beam 1112 may be spaced apart along the first direction X.

[0147] In some embodiments, the first heat exchange element 31 may be disposed on the first mounting beam 1111 , and the second heat exchange element 32 may be disposed on the third mounting beam.

[0148] In some embodiments, the connector 40 may include a first connector 41 and a second connector 42. The structure of the first connector 41 may be the same as that of the second connector 42.

[0149] In some embodiments, the surface of the first wall 11 facing the battery cell assembly 20 may be the inner surface of the first wall 11 , that is, the inner surface of the first wall 11 is the surface forming the accommodating space of the box body 10 , and the battery cell assembly 20 is arranged in the accommodating space of the box body 10 .

[0150] In some embodiments, the first mounting beams 1111 may be entirely located on one side of the plurality of battery cells 21 in the first direction X. The second mounting beams 1112 may be entirely located on the other side of the plurality of battery cells 21 in the first direction X.

[0151] In some embodiments, a portion of the first mounting beam 1111 may be located on one side of the plurality of battery cells 21 in the first direction X, and another portion may be located between the plurality of battery cells 21 and the first wall 11, that is, taking the thickness direction Z of the first wall as the projection direction, the plurality of battery cells 21 and the first mounting beam 1111 are projected onto a projection plane perpendicular to the thickness direction Z of the first wall, and a portion of the orthographic projection of the plurality of battery cells 21 overlaps with a portion of the orthographic projection of the first mounting beam 1111. A portion of the second mounting beam 1112 may be located on the other side of the plurality of battery cells 21 in the first direction X, and another portion may be located between the plurality of battery cells 21 and the first wall 11, that is, taking the thickness direction Z of the first wall as the projection direction, the plurality of battery cells 21 and the second mounting beam 1112 are projected onto a projection plane perpendicular to the thickness direction Z of the first wall, and a portion of the orthographic projection of the plurality of battery cells 21 overlaps with a portion of the orthographic projection of the second mounting beam 1112.

[0152] It should be noted that one of the two mounting beams 111 is a first mounting beam 1111 , and the other mounting beam 111 is a second mounting beam 1112 .

[0153] In some embodiments, taking the first mounting beam 1111 as an example, taking the first direction X as the projection direction, the first heat exchange member 31 and the protrusion 1113 of the first mounting beam 1111 are projected onto a projection plane perpendicular to the first direction X, and the orthographic projection of the first heat exchange member 31 partially overlaps with the orthographic projection of the protrusion 1113 of the first mounting beam 1111. The orthographic projection of the first heat exchange member 31 may completely cover the orthographic projection of the protrusion 1113 of the first mounting beam 1111, or the orthographic projection of the protrusion 1113 of the first mounting beam 1111 may completely cover the orthographic projection of the first heat exchange member 31, and the orthographic projection of the protrusion 1113 of the first mounting beam 1111 may coincide with the orthographic projection of the first heat exchange member 31.

[0154] In some embodiments, the first heat exchange member 31, the protrusion 1113 of the first mounting beam 1111, and the plurality of battery cells 21 are arranged in sequence along the first direction X. That is, the protrusion 1113 of the first mounting beam 1111 separates the first heat exchange member 31 from the plurality of battery cells 21, thereby reducing the risk of the first heat exchange member 31 moving close to the plurality of battery cells 21 along the first direction X and thereby interfering with the plurality of battery cells 21, and also reducing the risk of the protrusion 1113 of the first mounting beam 1111 moving away from the plurality of battery cells 21 along the first direction X and thereby interfering with other electrical components in the housing 10.

[0155] In some embodiments, the second heat exchange member 32, the protrusion 1113 of the second mounting beam 1112, and the plurality of battery cells 21 are arranged in sequence along the first direction X. That is, the protrusion 1113 of the second mounting beam 1112 separates the second heat exchange member 32 from the plurality of battery cells 21, thereby reducing the risk of the second heat exchange member 32 moving close to the plurality of battery cells 21 along the first direction X and thereby interfering with the plurality of battery cells 21, and also reducing the risk of the protrusion 1113 of the second mounting beam 1112 moving away from the plurality of battery cells 21 along the first direction X and thereby interfering with other electrical components in the housing 10.

[0156] The technical solution of the embodiment of the present application is to further improve the reliability of the connection between the heat exchange component 30 and the first wall 11 by disposing the first heat exchange component 31 on the side of the protrusion 1113 of the first mounting beam 1111 away from the multiple battery cells 21, and to dispose the second heat exchange component 32 on the side of the protrusion 1113 of the second mounting beam 1112 away from the multiple battery cells 21, and to connect the first heat exchange component 31 and the first wall 11 by the first connecting component 41, and to connect the second heat exchange component 32 and the first wall 11 by the second connecting component 42.

[0157] Please refer to Figure 5 , Figure 7 and Fig.11 In some embodiments, each mounting beam 111 includes a main body 1114, the main body 1114 is connected to the outer periphery of the protrusion 1113, the main body 1114 has a first surface 1114a away from the first wall, and the protrusion 1113 protrudes from the first surface 1114a. The first heat exchange member 31 is disposed on the main body 1114 of the first mounting beam 1111, and the first connecting member 41 connects the first heat exchange member 31 and the first wall 11. The second heat exchange member 32 is disposed on the main body 1114 of the second mounting beam 1112, and the second connecting member 42 connects the second heat exchange member 32 and the main body 1114 of the second mounting beam 1112.

[0158] In some embodiments, the main body 1114 of the first mounting beam 1111 can be connected to the surface of the first wall 11 facing the battery cell assembly 20 in the thickness direction Z of the first wall. In the thickness direction Z of the first wall, the surface is arranged opposite to the first surface 1114a, and the surface can be connected to the first wall 11 by bolting or welding.

[0159] The main body 1114 of the second mounting beam 1112 can be connected to the surface of the first wall 11 facing the battery cell assembly 20 in the thickness direction Z of the first wall. In the thickness direction Z of the first wall, the surface is arranged opposite to the first surface 1114a, and the surface can be connected to the first wall 11 by bolt connection or welding.

[0160] In some embodiments, the main body 1114 of the first mounting beam 1111 is connected to the outer periphery of the protrusion 1113 of the first mounting beam 1111, that is, a portion of the main body 1114 of the first mounting beam 1111 can be connected to the two ends of the protrusion 1113 of the first mounting beam 1111 in the second direction Y, and the other portion of the main body 1114 of the first mounting beam 1111 can be connected to the two ends of the protrusion 1113 of the first mounting beam 1111 in the first direction X.

[0161] The main body 1114 of the second mounting beam 1112 is connected to the outer periphery of the protrusion 1113 of the second mounting beam 1112, that is, a part of the main body 1114 of the second mounting beam 1112 can be connected to the two ends of the protrusion 1113 of the second mounting beam 1112 in the second direction Y, and the other part of the main body 1114 of the second mounting beam 1112 can be connected to the two ends of the protrusion 1113 of the second mounting beam 1112 in the first direction X.

[0162] Among them, a part of the main body 1114 is connected to one end of the protrusion 1113 facing the multiple battery cells 21 in the first direction X. This part of the main body 1114 can be arranged between the first wall 11 and the multiple battery cells 21, so that the multiple battery cells 21 can abut against the main body 1114, making the main body 1114 more reliably installed on the first wall 11.

[0163] In some embodiments, a portion of the main body 1114 of the first mounting beam 1111 is connected to an end of the protrusion 1113 of the first mounting beam 1111 that is away from the multiple battery cells 21 in the first direction X, and the first heat exchange member 31 is disposed on the main body 1114 of the first mounting beam 1111 and is connected through the first connecting member 41.

[0164] In some embodiments, a portion of the main body 1114 of the second mounting beam 1112 is connected to an end of the protrusion 1113 of the second mounting beam 1112 that is away from the multiple battery cells 21 in the first direction X, and the second heat exchange member 32 is disposed on the main body 1114 of the second mounting beam 1112 and is connected through a second connecting member 42.

[0165] In some embodiments, the protrusion 1113 of the first mounting beam 1111 protrudes from the first surface 1114a, that is, in the thickness direction Z of the first wall, the protrusion 1113 of the first mounting beam 1111 is away from one end of the first wall 11 and exceeds the first surface 1114a.

[0166] The protruding portion 1113 of the second mounting beam 1112 protrudes from the first surface 1114 a , that is, in the thickness direction Z of the first wall, the protruding portion 1113 of the second mounting beam 1112 faces away from one end of the first wall 11 and exceeds the first surface 1114 a .

[0167] In some embodiments, the main body 1114 and the protrusion 1113 may be integrally formed, or may be bolted or welded.

[0168] In some embodiments, the first heat exchange member 31 may contact a surface of the main body 1114 of the first mounting beam 1111 away from the first wall 11 in the thickness direction Z of the first wall, that is, the first heat exchange member 31 may contact the first surface 1114a.

[0169] In some embodiments, the second heat exchange member 32 may contact a surface of the main body 1114 of the second mounting beam 1112 away from the first wall 11 in the thickness direction Z of the first wall, that is, the second heat exchange member 32 may contact the first surface 1114a.

[0170] In some embodiments, the connector 40 includes a first connector 41 and a second connector 42. It should be noted that there may be multiple connectors 40, a portion of which is referred to as the first connector 41, and another portion of which is referred to as the second connector 42.

[0171] The technical solution of the embodiment of the present application is to connect the first heat exchange component 31 and the first wall 11 through the first connecting member 41, and connect the second heat exchange component 32 and the main body 1114 of the second mounting beam 1112 through the second connecting member 42, so as to realize the connection between the heat exchange component 30 and the first wall 11, thereby facilitating the improvement of the reliability of the connection between the heat exchange component 30 and the first wall 11.

[0172] Please refer to Figure 5 , Figure 7 , and refer to Fig. 9 , Fig. 9Schematic diagram of the structure of the first connecting member. In some embodiments, the first connecting member 41 includes a first section 411, a second section 412, and a third section 413 connected in sequence, the first section 411 and the third section 413 extend along the first direction X, and the first section 411 and the third section 413 are arranged in parallel, the second section 412 connects the first section 411 and the third section 413, the first section 411 is connected to the side of the first heat exchange member 31 away from the first wall 11 in the thickness direction Z of the first wall, and the third section 413 is connected to the first wall 11.

[0173] In some embodiments, the first connecting member 41 may be a bent member, and the first section 411 , the second section 412 and the third section 413 are integrally formed.

[0174] In some embodiments, the first section 411 and the third section 413 can extend along the first direction X, and the first section 411 is connected to the end surface of the first heat exchange element 31 that is away from the first wall 11 in the thickness direction Z of the first wall. It should be noted that the end surface can extend along the first direction X so that the first section 411 can better fit the end surface.

[0175] The first section 411 and the first heat exchange element 31 may be connected by welding.

[0176] In some embodiments, the third section 413 is connected to the first wall 11 , and the connection method may be direct connection or indirect connection. The third section 413 is connected to a component connected to the first wall 11 .

[0177] In some embodiments, the second section 412 may extend along the thickness direction Z of the first wall, and the second section 412 may be spaced apart from the first heat exchange member 31, or the second section 412 may be attached to the side of the first heat exchange member 31 away from the plurality of battery cells 21 in the first direction X to improve the reliability of the connection of the first connecting member 41.

[0178] In some embodiments, the number of the first connecting member 41 may be one, and one first connecting member 41 is connected to the middle position of the first heat exchange member 31 in the second direction Y.

[0179] In some embodiments, the number of the first connecting members 41 may be two, and the two first connecting members 41 are connected to two ends of the first heat exchange member 31 in the second direction Y, respectively.

[0180] In some embodiments, there may be a plurality of first connecting members 41 , and the plurality of first connecting members 41 are arranged at intervals along the second direction Y and connected to the first heat exchange member 31 .

[0181] The technical solution of the embodiment of the present application is to connect the first section 411 to the side of the first heat exchanger 31 facing away from the first wall 11, so that the first section 411 can overlap the first heat exchanger 31, thereby helping to improve the reliability of the connection between the first section 411 and the first heat exchanger 31, thereby helping to improve the reliability of the connection between the heat exchange assembly 30 and the first wall 11.

[0182] Please refer to Figures 5 to 9 , Figure 8 Schematic diagram of the internal structure of a battery device provided for some other embodiments of the present application. In some embodiments, the battery device 1 includes a mounting seat 50 and a first fastener 60, and the mounting seat 50 is arranged on the surface of the first wall 11 facing the battery cell assembly 20. The third section 413 is provided with a first mounting hole 4131, and the first mounting hole 4131 passes through the two end surfaces of the third section 413 in the thickness direction Z of the first wall, and the mounting seat 50 is provided with a second mounting hole 51 corresponding to the first mounting hole 4131, and the first fastener 60 passes through the first mounting hole 4131 and is connected to the second mounting hole 51.

[0183] In some embodiments, the first fastener 60 can be a bolt, which passes through the first mounting hole 4131 along the thickness direction Z of the first wall, and one end of the first fastener 60 abuts against the end surface of the third section 413 facing away from the first wall 11 in the thickness direction Z of the first wall, and the other end of the first fastener 60 passes through the first mounting hole 4131 and is connected to the second mounting hole 51.

[0184] Among them, the mounting seat 50 can be a solid component, the second mounting hole 51 can be arranged on the surface of the mounting seat 50 facing the third section 413 in the thickness direction Z of the first wall, and is located inside the mounting seat 50, the second mounting hole 51 can have a larger size in the thickness direction Z of the first wall, and a thread is set on the inner wall of the second mounting hole 51, and one end of the first fastener 60 is threadedly connected to the second mounting hole 51.

[0185] Alternatively, the mounting seat 50 may be a hollow component, that is, the mounting seat 50 has a plate member with a second mounting hole 51, and one end of the mounting seat 50 is disposed on the main body 1114 of the first mounting beam 1111, and the mounting method may be welding, bolt connection, or integrally formed with the main body 1114 of the first mounting beam 1111. In the thickness direction Z of the first wall, the plate member is spaced apart from the main body 1114 of the first mounting beam 1111, so as to form a space for accommodating the first fastener 60 between the plate member and the main body 1114 of the first mounting beam 1111, and one end of the first fastener 60 away from the first mounting hole 4131 is penetrated through the second mounting hole 51 and accommodated in the space between the plate member and the main body 1114 of the first mounting beam 1111. The first fastener 60 may be sleeved with a nut, and the nut contacts the surface of the plate member away from the third section 413 in the thickness direction Z of the first wall.

[0186] The technical solution of the embodiment of the present application connects the first mounting hole 4131 and the second mounting hole 51 through the first fastener 60, so that the first connecting member 41 connects the heat exchange component 30 and the first wall 11, which is beneficial to improving the convenience and reliability of the connection.

[0187] Please refer to Figures 5 to 7 In some embodiments, a water inlet 311 and a water outlet 312 are provided on the side of the first heat exchange element 31 facing away from the plurality of third heat exchange elements 33, and the heat exchange assembly 30 includes a water inlet pipe 34 and a water outlet pipe 35, one end of the water inlet pipe 34 is connected to the water inlet 311, and one end of the water outlet pipe 35 is connected to the water outlet 312.

[0188] It should be noted that the water inlet 311 and the water outlet 312 in this embodiment are the same as the water inlet 311 and the water outlet 312 mentioned in the above embodiment, and no further introduction is given here.

[0189] In some embodiments, one end of the water inlet pipe 34 can be connected to the water inlet 311 of the first heat exchange element 31, so that the water inlet pipe 34 is connected to the first flow channel inside the first heat exchange element 31, and the other end of the water inlet pipe 34 is connected to the outside world, so that heat exchange medium can be transported from the outside world to the first flow channel of the first heat exchange element 31 through the water inlet pipe 34.

[0190] In some embodiments, one end of the water outlet pipe 35 can be connected to the water outlet 312 of the first heat exchange element 31, so that the water outlet pipe 35 is connected to the first flow channel inside the first heat exchange element 31, and the other end of the water outlet pipe 35 is connected to the outside world, so that the heat exchange medium in the first flow channel inside the first heat exchange element 31 can be transported to the outside world.

[0191] It should be noted that one or two walls of the box body 10 may be provided with openings for accommodating the water inlet pipe 34 and the water outlet pipe 35. In order to improve the sealing inside the box body 10, the opening may be provided with a sealing ring, or a flange may be provided at the opening, and the water inlet pipe 34 and the water outlet pipe 35 are connected to the outside through the flange.

[0192] In some embodiments, the box body 10 may include a plurality of second walls 12, and the plurality of second walls 12 are disposed around the outer periphery of the first wall 11. The first wall 11 may be a bottom wall 14, and the second wall 12 may be a side wall 15.

[0193] In some embodiments, the number of the second walls 12 may be four.

[0194] In some embodiments, the plurality of second walls 12 include two second walls 12 spaced apart along the first direction X and two second walls 12 spaced apart along the second direction Y. The two ends of the protrusion 1113 of the first mounting beam 1111 in the second direction Y can be respectively connected to the two second walls 12 spaced apart along the second direction Y, so as to divide the internal space of the box body 10 into two areas, wherein the plurality of battery cells 21 are located in one area, and the water inlet pipe 34 and the water outlet pipe 35 are located in the other area. That is, one of the two second walls 12 spaced apart along the first direction X, a portion of the first wall 11, a portion of the two second walls 12 spaced apart along the second direction Y, and the protrusion 1113 of the first mounting beam 1111 together enclose the mounting cavity 13.

[0195] In some embodiments, the battery device 1 further includes other electrical components, such as a wiring harness, etc., which can also be accommodated in the installation cavity 13 .

[0196] Since the installation cavity 13 still has residual space after the water inlet pipe 34, the water outlet pipe 35 and other electrical components are installed in the installation cavity 13, in order to reasonably utilize the space, in some embodiments, the installation seat 50 is also disposed in the installation cavity 13, so that the installation seat 50 is located on the side of the first heat exchange element 31 away from the plurality of third heat exchange elements 33. It should be noted that the installation seat 50 can avoid the water inlet pipe 34 and the water outlet pipe 35 to reduce the risk of interference with the water inlet pipe 34 and the water outlet pipe 35.

[0197] In some embodiments, at least part of the mounting seat 50 may be disposed on a side of the first heat exchanger 31 away from the third heat exchangers 33. A second mounting hole 51 is disposed on a portion of the mounting seat 50 located on a side of the first heat exchanger 31 away from the third heat exchangers 33.

[0198] The technical solution of the embodiment of the present application realizes the circulation of the heat exchange medium in the heat exchange assembly 30 by setting the water inlet pipe 34 and the water outlet pipe 35, so that the heat exchange assembly 30 can have a better heat exchange effect, thereby facilitating the improvement of the temperature regulation effect of the heat exchange assembly 30 on the battery cell 21. At the same time, the water inlet 311 and the water outlet 312 are set on the side of the first heat exchange element 31 away from the plurality of third heat exchange elements 33, and the water inlet pipe 34 is connected to the water inlet 311, and the water outlet pipe 35 is connected to the water outlet 312, which can reduce the risk of interference between the water inlet pipe 34 and the water outlet pipe 35 and the plurality of battery cells 21, thereby facilitating the improvement of the reliability of the battery device 1.

[0199] Please refer to Figure 5 , Fig.10 and Fig.11 , Fig.10 Schematic diagram of the structure of the second connecting member. In some embodiments, the second connecting member 42 includes a fourth section 421, a fifth section 422 and a sixth section 423 connected in sequence, the fourth section 421 and the sixth section 423 extend along the second direction Y, and the fourth section 421 and the sixth section 423 are arranged in parallel, the fifth section 422 connects the fourth section 421 and the sixth section 423, the fourth section 421 is connected to the side of the second heat exchange member 32 away from the first wall 11 in the thickness direction Z of the first wall, and the sixth section 423 is connected to the main body 1114 of the second mounting beam 1112.

[0200] In some embodiments, the second connecting member 42 may be a bent member, and the fourth section 421 , the fifth section 422 and the sixth section 423 may be integrally formed.

[0201] In some embodiments, the fourth section 421 and the sixth section 423 can extend along the second direction Y, and the fourth section 421 is connected to the end surface of the second heat exchange element 32 that is away from the first wall 11 in the thickness direction Z of the first wall. It should be noted that the end surface can extend along the first direction X so that the fourth section 421 can better fit the end surface.

[0202] The fourth section 421 and the second heat exchange element 32 may be connected by welding.

[0203] In some embodiments, the sixth section 423 is connected to the main body 1114 of the second mounting beam 1112 . The connection method can be direct or indirect. The sixth section 423 is connected to the component connected to the main body 1114 of the second mounting beam 1112 .

[0204] In some embodiments, the fifth section 422 can extend along the thickness direction Z of the first wall, the fifth section 422 can be spaced apart from the second heat exchange element 32, or the fifth section 422 can also be attached to one side of the second heat exchange element 32 in the second direction Y to improve the reliability of the connection of the second connecting member 42.

[0205] In some embodiments, the number of the second connecting member 42 may be one, and one second connecting member 42 is connected to one side of the second heat exchange member 32 in the second direction Y.

[0206] In some embodiments, the number of the second connecting members 42 may be two, and the two second connecting members 42 are connected to two ends of the second heat exchange member 32 in the second direction Y, respectively.

[0207] In some embodiments, the number of the second connectors 42 may be more than two, a portion of the plurality of second connectors 42 is connected to one end of the second heat exchange member 32 in the second direction Y, and the plurality of second connectors 42 are arranged along the first direction X. Another portion of the plurality of second connectors 42 is connected to the other end of the second heat exchange member 32 in the second direction Y, and the plurality of second connectors 42 are arranged along the first direction X.

[0208] In some embodiments, the sixth section 423 may be connected to the main body 1114 of the second mounting beam 1112 located at the protrusion 1113 of the second mounting beam 1112 in the second direction Y.

[0209] The technical solution of the embodiment of the present application connects the fourth section 421 to the side of the second heat exchange member 32 away from the first wall 11, so that the fourth section 421 can overlap the second heat exchange member 32, thereby facilitating the reliability of the connection between the fourth section 421 and the second heat exchange member 32, thereby facilitating the reliability of the connection between the heat exchange assembly 30 and the first wall 11. At the same time, by setting the fourth section 421 and the sixth section 423 to extend along the second direction Y, the space occupied by the second connecting member 42 in the first direction X in the box body 10 can be reduced, thereby reducing the size of the box body 10 in the first direction X, and then improving the space utilization rate of the battery device 1 in the first direction X.

[0210] Please refer to Figure 5 , Fig.10 and Fig.11 In some embodiments, the battery device 1 includes a second fastener 62. The sixth section 423 is provided with a third mounting hole 4231, the third mounting hole 4231 penetrates through two end surfaces of the sixth section 423 in the thickness direction Z of the first wall, the main body 1114 of the second mounting beam 1112 is provided with a fourth mounting hole 1114b corresponding to the third mounting hole 4231, and the second fastener 62 passes through the third mounting hole 4231 and is connected to the fourth mounting hole 1114b.

[0211] In some embodiments, the sixth section 423 may be provided with a third mounting hole 4231, the main body 1114 of the second mounting beam 1112 may be provided with a fourth mounting hole 1114b corresponding to the mounting hole of the sixth section 423, and the third mounting hole 4231 and the fourth mounting hole 1114b are connected by a second fastener 62. The second fastener 62 may be a bolt.

[0212] It should be noted that in order to allow the second fastener 62 to have sufficient installation space, the main body 1114 of the second mounting beam 1112 provided with the fourth mounting hole 1114b can protrude along the thickness direction Z of the first wall, so that in the thickness direction Z of the first wall, the main body 1114 of the second mounting beam 1112 is spaced apart from the first wall 11, and an installation space for the second fastener 62 is formed between the main body 1114 of the second mounting beam 1112 and the first wall 11.

[0213] The technical solution of the embodiment of the present application connects the third mounting hole 4231 and the fourth mounting hole 1114b through the second fastener 62, so that the second connecting member 42 connects the heat exchange assembly 30 and the first wall 11, which is beneficial to improving the convenience and reliability of the connection.

[0214] Please refer to Figure 7 and Fig.11 In some embodiments, the material of the first connecting member 41, the material of the second connecting member 42, the material of the mounting seat 50, and the material of the second mounting beam 1112 are all metal materials, the material of the first connecting member 41 is different from the material of the mounting seat 50, and the material of the second connecting member 42 is different from the material of the second mounting beam 1112. The outer surface of the first fastener 60 is provided with a first protective layer 61, and the outer surface of the second fastener 62 is provided with a second protective layer 63, and the material of the first protective layer 61 and the material of the second protective layer 63 are both anti-potential corrosion materials.

[0215] In some embodiments, the material of the first connecting member 41 may be metal material, and the material of the first connecting member 41 may be aluminum.

[0216] In some embodiments, the material of the first connecting member 41 may be the same as the material of the first heat exchange member 31 .

[0217] In some embodiments, the material of the mounting base 50 may be metal, or the material of the mounting base 50 may be steel.

[0218] In some embodiments, the material of the mounting base 50 may be the same as the material of the main body 1114 of the first mounting beam 1111 and the material of the first wall 11 .

[0219] In some embodiments, the first connection member 41 can achieve equipotential connection between the mounting base 50 and the first connection member 41 .

[0220] In some embodiments, the outer surface of the first fastener 60 may be provided with a first protective layer 61. It should be noted that the first fastener 60 may be a bolt, and the first fastener 60 is threadedly connected with the first mounting hole 4131 and the second mounting hole 51. Since there is a large stress between the threaded portion of the first fastener 60 and the first mounting hole 4131 and the second mounting hole 51 during the installation process, the first protective layer 61 may not be provided on the threaded portion of the first fastener 60, or the threaded portion of the first fastener 60 is provided with the first protective layer 61, but due to the stress, the first protective layer 61 is destroyed, so that the threaded portion of the first fastener 60 has less first protective layer 61.

[0221] In some embodiments, the first protective layer 61 may be a zinc-nickel layer plated on the outer surface of the first fastener 60 , wherein the zinc-nickel material has a better performance in preventing potential corrosion.

[0222] It should be noted that a nut may be provided at the other end of the first fastener 60 away from the first mounting hole 4131 , and a protective layer may be provided on the outer surface of the nut, which may also be a zinc-nickel layer plated on the outer surface of the nut.

[0223] In some embodiments, the first protective layer 61 may be disposed on the first fastener 60 by dipping or electroplating.

[0224] Similarly, the cooperation between the first connecting member 41 and the first fastening member 60 is the same. In some embodiments, the material of the second connecting member 42 can be metal material, and the material of the second connecting member 42 can be aluminum.

[0225] In some embodiments, the material of the second connecting member 42 may be the same as the material of the second mounting beam 1112 .

[0226] In some embodiments, the material of the main body 1114 of the second mounting beam 1112 may be metal, or the material of the main body 1114 of the second mounting beam 1112 may be steel.

[0227] In some embodiments, the material of the main body 1114 of the second mounting beam 1112 may be the same as the material of the first wall 11 .

[0228] In some embodiments, the second connecting member 42 can achieve equipotential connection between the main body 1114 of the second mounting beam 1112 and the second connecting member 42 .

[0229] In some embodiments, the second fastener 62 is used to realize the connection between the second connector 42 and the main body 1114 of the second mounting beam 1112. The outer surface of the second fastener 62 may be provided with a second protective layer 63. It should be noted that the second fastener 62 is threadedly connected with the third mounting hole 4231 of the sixth section 423 and the fourth mounting hole 1114b of the main body 1114 of the second mounting beam 1112. Since there is a large stress between the threaded portion of the second fastener 62 and the third mounting hole 4231 of the sixth section 423 and the fourth mounting hole 1114b of the main body 1114 of the second mounting beam 1112 during the installation process, the second protective layer 63 may not be provided on the threaded portion of the second fastener 62, or the threaded portion of the second fastener 62 is provided with the second protective layer 63, but due to the stress, the second protective layer 63 is destroyed, so that the threaded portion of the second fastener 62 has less second protective layer 63.

[0230] In some embodiments, the second protective layer 63 disposed on the second fastener 62 may be a zinc-nickel layer plated on the outer surface of the second fastener 62 , wherein the zinc-nickel material has a better performance in preventing potential corrosion.

[0231] It should be noted that a nut may be provided at the other end of the second fastener 62 away from the sixth section 423 , and a protective layer may be provided on the outer surface of the nut, which may also be a zinc-nickel layer plated on the outer surface of the nut.

[0232] It should be noted that the second protective layer 63 can be provided on the second fastener 62 by means of infiltration or electroplating.

[0233] According to the technical solution of the embodiment of the present application, the internal space of the box 10 of the battery device 1 is a high-pressure environment, the mounting seat 50 and the first connecting member 41 are made of different metal materials, and the second mounting beam 1112 and the second connecting member 42 are made of different metal materials. By setting a first protective layer 61 of anti-potential corrosion material on the outer surface of the first fastener 60, and setting a second protective layer 63 of anti-potential corrosion material on the outer surface of the second fastener 62, the first fastener 60 can achieve equipotential connection between the first connecting member 41 and the mounting seat 50 when connecting the first connecting member 41 and the mounting seat 50, and the second fastener 62 can achieve equipotential connection between the second connecting member 42 and the second mounting beam 1112 when connecting the second connecting member 42 and the second mounting beam 1112, thereby reducing the risk of potential corrosion of the first fastener 60 and the second fastener 62, thereby reducing the risk of potential corrosion affecting the structural strength of the first fastener 60 and the second fastener 62, thereby facilitating improving the reliability of the connection between the heat exchange assembly 30 and the first wall 11.

[0234] Please refer to Figure 7 and Fig. 9In some embodiments, the first connecting member 41 is provided with a third protective layer 414, and the third protective layer 414 is disposed between the first connecting member 41 and the first fastener 60. The second connecting member 42 is provided with a fourth protective layer 424, and the fourth protective layer 424 is disposed between the second connecting member 42 and the second fastener 62. The material of the third protective layer 414 and the material of the fourth protective layer 424 are both anti-potential corrosion materials.

[0235] In some embodiments, the first fastener 60 can be a bolt, wherein the first fastener 60 is passed through the first mounting hole 4131 of the third section 413. In order to achieve the fixation of the first fastener 60, a part of the first fastener 60 that is away from the second mounting hole 51 can abut against the surface of the third section 413 away from the first wall 11 in the thickness direction Z of the first wall.

[0236] In order to reduce the risk of potential corrosion of the first connecting member 41, in some embodiments, a third protective layer 414 is provided between the first connecting member 41 and the first fastener 60. The third protective layer 414 can be provided on the surface of the third section 413 facing away from the first wall 11 in the thickness direction Z of the first wall.

[0237] It should be noted that the first fastener 60 can be a bolt, and the first fastener 60 is threadedly connected to the first mounting hole 4131. Since there is a large stress between the threaded portion of the first fastener 60 and the threaded portion of the first mounting hole 4131 during the installation process, the third protective layer 414 may not be provided on the threaded portion of the first mounting hole 4131, or the threaded portion of the first mounting hole 4131 is provided with the third protective layer 414, but due to the stress, the third protective layer 414 is destroyed, so that there is less third protective layer 414 on the threaded portion of the first mounting hole 4131.

[0238] In some embodiments, the third protective layer 414 may be a protective layer formed after the third segment 413 of the first connector 41 is subjected to electrophoresis treatment.

[0239] The same is true for the third protective layer 414 of the first connecting member 41. In some embodiments, the second fastener 62 is inserted into the third mounting hole 4231 of the sixth section 423. To fix the second fastener 62, a portion of the main body 1114 of the second fastener 62 that is away from the second mounting beam 1112 can abut against the surface of the sixth section 423 that is away from the first wall 11 in the thickness direction Z of the first wall.

[0240] In order to reduce the risk of potential corrosion of the second connecting member 42, in some embodiments, a fourth protective layer 424 is provided between the second connecting member 42 and the second fastener 62. The fourth protective layer 424 can be provided on the surface of the sixth section 423 away from the first wall 11 in the thickness direction Z of the first wall.

[0241] It should be noted that the second fastener 62 is threadedly connected to the mounting hole of the sixth section 423. Since there is a large stress between the threaded portion of the second fastener 62 and the threaded portion of the third mounting hole 4231 of the sixth section 423 during the installation process, the fourth protective layer 424 may not be provided on the threaded portion of the third mounting hole 4231 of the sixth section 423, or the threaded portion of the third mounting hole 4231 of the sixth section 423 is provided with the fourth protective layer 424, but due to the stress, the fourth protective layer 424 is destroyed, so that there is less fourth protective layer 424 on the threaded portion of the third mounting hole 4231 of the sixth section 423.

[0242] In some embodiments, the fourth protection layer 424 may be formed by performing electrophoresis treatment on the sixth segment 423 of the second connector 42 .

[0243] The technical solution of the embodiment of the present application reduces the risk of potential corrosion of the first connector 41 and the second connector 42 by providing a third protective layer 414 of an anti-potential corrosion material between the first connector 41 and the first fastener 60, and provides a fourth protective layer 424 of an anti-potential corrosion material between the second connector 42 and the second fastener 62, thereby reducing the risk of potential corrosion affecting the structural strength of the first connector 41 and the second connector 42 due to potential corrosion, thereby facilitating the improvement of the reliability of the connection between the heat exchange assembly 30 and the first wall 11. Please refer to Figure 5 and Fig.11 , and refer to Fig.10 , Fig.10 Schematic diagram of the structure of the first connector. In some embodiments, the battery cell assembly 20 includes a first end plate 22 and a second end plate 23, and the first end plate 22 and the second end plate 23 are respectively connected to two sides of the plurality of battery cells 21 in the first direction X. The first end plate 22 is connected to the protrusion 1113 of the first mounting beam 1111, and the second end plate 23 is connected to the protrusion 1113 of the second mounting beam 1112.

[0244] In some embodiments, the first end plate 22 is connected to one side of the multiple battery cells 21 in the first direction X, wherein one end of the third heat exchange element 33 in the first direction X is connected to the first heat exchange element 31, the third heat exchange element 33 is located between the multiple battery cells 21 and the first wall 11, and the first end plate 22 can be connected to the side of the multiple battery cells 21 in the first direction X facing the first heat exchange element 31.

[0245] The second end plate 23 is connected to the other side of the multiple battery cells 21 in the first direction X, wherein one end of the third heat exchange element 33 in the first direction X is connected to the second heat exchange element 32, the third heat exchange element 33 is located between the multiple battery cells 21 and the first wall 11, and the second end plate 23 can be connected to the side of the multiple battery cells 21 in the first direction X facing the second heat exchange element 32.

[0246] In some embodiments, the battery cell assembly 20 may include a second end plate 23 and a first end plate 22 , and the first end plate 22 and the second end plate 23 are respectively disposed on both sides of the plurality of battery cells 21 in the first direction X.

[0247] In some embodiments, the structures of the first end plate 22 and the second end plate 23 may be the same or different.

[0248] In some embodiments, the first end plate 22 and the plurality of battery cells 21 may be connected by bolts, adhesives, or by binding members.

[0249] In some embodiments, the second end plate 23 and the plurality of battery cells 21 may be connected by bolts, adhesive bonding, or by a binding member.

[0250] In some embodiments, the first end plate 22 is disposed at one end of the plurality of battery cells 21 close to the first heat exchange element 31 , and the second end plate 23 is disposed at one end of the plurality of battery cells 21 close to the second heat exchange element 32 .

[0251] In some embodiments, the manner in which the first end plate 22 is connected to the plurality of battery cells 21 may be the same as or different from the manner in which the second end plate 23 is connected to the plurality of battery cells 21 .

[0252] In some embodiments, the first end plate 22 and the second end plate 23 are respectively disposed on both sides of the plurality of battery cells 21 in the first direction X to clamp the plurality of battery cells 21 .

[0253] In some embodiments, the first wall 11 is provided with a first mounting beam 1111 , and the first end plate 22 is connected to the first mounting beam 1111 , and the connection method may be welding, bolt locking, or the like.

[0254] In some embodiments, the first wall 11 is provided with a second mounting beam 1112 , and the second end plate 23 is connected to the second mounting beam 1112 , and the connection method may be welding, bolt locking, or the like.

[0255] In some embodiments, the third heat exchange member 33 may include a plurality of parts in the thickness direction Z of the first wall. A portion of the third heat exchange member 33 may be located between the first mounting beam 1111 and the plurality of battery cells 21, a portion may be located between the second mounting beam 1112 and the plurality of battery cells 21, a portion may be located between the first mounting beam 1111 and the first end plate 22, a portion may be located between the second mounting beam 1112 and the second end plate 23, and a portion may be located between the second mounting beam 1112 and the plurality of battery cells.

[0256] In some embodiments, the first mounting beam 1111 may include a protrusion 1113, and the first end plate 22 is connected to the protrusion 1113 of the first mounting beam 1111, thereby achieving the connection between the first end plate 22 and the first mounting beam 1111. The first end plate 22 may be disposed on the surface of the protrusion 1113 of the first mounting beam 1111 away from the first wall 11 in the thickness direction Z of the first wall, and the connection may be bolted, welded, or the like.

[0257] The second mounting beam 1112 may include a protrusion 1113, and the second end plate 23 is connected to the protrusion 1113 of the second mounting beam 1112, thereby achieving connection between the second end plate 23 and the second mounting beam 1112. The second end plate 23 may be disposed on the surface of the protrusion 1113 of the second mounting beam 1112 that is away from the first wall 11 in the thickness direction Z of the first wall, and the connection may be by bolt connection, welding, or the like.

[0258] In some embodiments, the protrusion 1113 of the first mounting beam 1111 may be located at one side of the plurality of battery cells 21 in the first direction X, and a surface of the protrusion 1113 of the first mounting beam 1111 facing the plurality of battery cells 21 in the first direction X may contact a portion of one end of the plurality of battery cells 21 in the first direction X. At the same time, a surface of the first end plate 22 facing the plurality of battery cells 21 in the first direction X may contact another portion of one end of the protrusion 1113 of the plurality of battery cells 21 in the first direction X facing the first mounting beam 1111.

[0259] The protrusion 1113 of the second mounting beam 1112 may be located at the other side of the plurality of battery cells 21 in the first direction X, and the surface of the protrusion 1113 of the second mounting beam 1112 facing the plurality of battery cells 21 in the first direction X may contact a portion of the other end of the plurality of battery cells 21 in the first direction X. At the same time, the surface of the second end plate 23 facing the plurality of battery cells 21 in the first direction X may contact another portion of one end of the plurality of battery cells 21 in the first direction X facing the protrusion 1113 of the second mounting beam 1112.

[0260] In some embodiments, the first wall 11 may include three parts, a part of the first wall 11 supports multiple battery cells 21, another part of the first wall 11 may be recessed along the thickness direction Z of the first wall away from the multiple battery cells 21, so that the protrusion 1113 of the first mounting beam 1111 is set in the recessed area, and another part of the first wall 11 may be recessed along the thickness direction Z of the first wall away from the multiple battery cells 21, so that the protrusion 1113 of the second mounting beam 1112 is set in the recessed area.

[0261] The first end plate 22 is arranged on the protrusion 1113 of the first mounting beam 1111, and the surface of the first end plate 22 facing the multiple battery cells 21 in the first direction X can be in contact with one end of the multiple battery cells 21 in the first direction X, and the surface of the protrusion 1113 of the first mounting beam 1111 facing the multiple battery cells 21 in the first direction X does not contact the multiple battery cells 21, and the end of the protrusion 1113 of the first mounting beam 1111 facing away from the first wall 11 in the thickness direction Z of the first wall can be flush with one end of the multiple battery cells 21 facing the first wall 11 in the thickness direction Z of the first wall.

[0262] The second end plate 23 is arranged on the protrusion 1113 of the second mounting beam 1112, and the surface of the second end plate 23 facing the multiple battery cells 21 in the first direction X can be in contact with the other ends of the multiple battery cells 21 in the first direction X, and the surface of the protrusion 1113 of the second mounting beam 1112 facing the multiple battery cells 21 in the first direction X does not contact the multiple battery cells 21, and the end of the protrusion 1113 of the second mounting beam 1112 facing away from the first wall 11 in the thickness direction Z of the first wall can be flush with the end of the multiple battery cells 21 facing the first wall 11 in the thickness direction Z of the first wall.

[0263] In some embodiments, the first heat exchange element 31 can be located on the side of the protrusion 1113 of the first mounting beam 1111 that is away from the multiple battery cells 21, that is, in the first direction X, the first heat exchange element 31, the protrusion 1113 of the first mounting beam 1111 and the multiple battery cells 21 are distributed in sequence, and the first heat exchange element 31 can be located on the side of the first end plate 22 that is away from the multiple battery cells 21 in the first direction X.

[0264] The second heat exchange member 32 can be located on the side of the protrusion 1113 of the second mounting beam 1112 that is away from the multiple battery cells 21, that is, in the first direction X, the second heat exchange member 32, the protrusion 1113 of the second mounting beam 1112 and the multiple battery cells 21 are distributed in sequence, and the second heat exchange member 32 can be located on the side of the second end plate 23 that is away from the multiple battery cells 21 in the first direction X.

[0265] The technical solution of the embodiment of the present application is that the first end plate 22 and the second end plate 23 are respectively connected to the two sides of the plurality of battery cells 21 in the first direction X, which can facilitate the arrangement of the plurality of battery cells 21. In addition, the protrusion 1113 of the first mounting beam 1111 is connected to the first end plate 22, and the protrusion 1113 of the second mounting beam 1112 is connected to the second end plate 23, thereby facilitating the reliability of the installation of the battery cell assembly 20.

[0266] Please refer to Figures 5 to 7 In some embodiments, the protrusion 1113 is a hollow structure, a first opening is formed on the side of the protrusion 1113 facing the first wall 11, the first wall 11 closes the first opening, and forms a cavity 1115 with the protrusion. The battery device 1 includes a third fastener 64 and a fourth fastener 65, the first end plate 22 is disposed at one end of the protrusion 1113 of the first mounting beam 1111 away from the first wall 11 in the thickness direction Z of the first wall, the third fastener 64 connects the first end plate 22 and the protrusion 1113 of the first mounting beam 1111, and one end of the third fastener 64 is disposed in the cavity 1115 of the first mounting beam 1111. The second end plate 23 is arranged on the protrusion 1113 of the second mounting beam 1112 at one end away from the first wall 11 in the thickness direction Z of the first wall, and the fourth fastener 65 connects the second end plate 23 and the protrusion 1113 of the second mounting beam 1112, and one end of the fourth fastener 65 is arranged in the cavity 1115 of the second mounting beam 1112.

[0267] In some embodiments, the mounting beam 111 may be a plate, and the protrusion 1113 of the mounting beam 111 may be formed by bending the mounting beam 111, and the bending direction is to bend away from the first wall 11 along the thickness direction Z of the first wall, so that the protrusion 1113 protrudes from the main body 1114. In particular, since the protrusion 1113 protrudes away from the first wall 11 along the thickness direction Z of the first wall, the protrusion 1113 and the first wall 11 are spaced apart in the thickness direction Z of the first wall, so that a cavity 1115 is formed between the protrusion 1113 and the first wall 11.

[0268] In some embodiments, the first end plate 22 may be disposed on a surface of the protrusion 1113 of the first mounting beam 1111 away from the first wall 11 in the thickness direction Z of the first wall, and the surface may be a relatively flat surface to facilitate connection with the first end plate 22 .

[0269] The second end plate 23 may be disposed on a surface of the protruding portion 1113 of the second mounting beam 1112 that is away from the first wall 11 in the thickness direction Z of the first wall. The surface may be a relatively flat surface to facilitate connection with the second end plate 23 .

[0270] In some embodiments, the first end plate 22 can be connected to the surface of the first wall 11 away from the protrusion 1113 of the first mounting beam 1111 in the thickness direction Z of the first wall through a third fastener 64. The third fastener 64 can be a bolt. One end of the third fastener 64 passes through the surface and enters the cavity 1115 of the first mounting beam 1111. The cavity 1115 of the first mounting beam 1111 provides an installation space for the nut, so that the bolt entering the cavity 1115 of the first mounting beam 1111 can cooperate with the nut.

[0271] In some embodiments, the second end plate 23 can be connected to the surface of the first wall 11 away from the protrusion 1113 of the second mounting beam 1112 in the thickness direction Z of the first wall through a fourth fastener 65. The fourth fastener 65 can be a bolt. One end of the fourth fastener 65 passes through the surface and enters the cavity 1115 of the second mounting beam 1112. The cavity 1115 of the second mounting beam 1112 provides an installation space for the nut, so that the fourth fastener 65 entering the cavity 1115 of the second mounting beam 1112 can cooperate with the nut.

[0272] In some embodiments, the protrusion 1113 is a hollow structure, which can reduce the weight of the mounting beam 111 , thereby reducing the weight of the battery device 1 and improving the energy density of the battery device 1 .

[0273] The technical solution of the embodiment of the present application is that the cavity 1115 is surrounded by the protrusion 1113 and the first wall 11, and the first end plate 22 is arranged on the surface of the protrusion 1113 of the first mounting beam 1111 away from the first wall 11 in the thickness direction Z of the first wall, and the second end plate 23 is arranged on the surface of the protrusion 1113 of the second mounting beam 1112 away from the first wall 11 in the thickness direction Z of the first wall, so that the cavity 1115 can provide an accommodating space, so that the third fastener 64 is connected When the first end plate 22 and the protrusion 1113 of the first mounting beam 1111 and the fourth fastener 65 connect the second end plate 23 and the protrusion 1113 of the second mounting beam 1112, a portion of the third fastener 64 can extend into the cavity 1115 of the first mounting beam 1111, and the fourth fastener 65 can extend into the cavity 1115 of the second mounting beam 1112, providing installation space for the third fastener 64 and the fourth fastener 65, which is conducive to improving the convenience of installation of the first end plate 22.

[0274] Please refer to Figure 5 and Figure 7 , and refer to Figure 8 ,in Figure 8Part of the box wall, the battery cell assembly and part of the third heat exchanger are hidden in the box. In some embodiments, the protrusion 1113 has a plurality of first grooves 1113a, and the plurality of first grooves 1113a are arranged at intervals along the second direction Y. The first grooves 1113a penetrate the protrusion 1113 of the first mounting beam 1111 along the first direction X, and at least one third heat exchanger 33 is arranged in one first groove 1113a.

[0275] A portion of the third heat exchange element 33 is located between the multiple battery cells 21 and the first wall 11. In order to connect the third heat exchange element 33 to the first heat exchange element 31 and the second heat exchange element 32, the end of the third heat exchange element 33 used to connect with the first heat exchange element 31 needs to pass through the protrusion 1113 of the first mounting beam 1111, and the end of the third heat exchange element 33 used to connect with the second heat exchange element 32 needs to pass through the protrusion 1113 of the second mounting beam 1112. One end of the third heat exchange member 33 can be arranged at the end of the protrusion 1113 of the first mounting beam 1111 away from the first wall 11 in the thickness direction Z of the first wall, and the other end of the third heat exchange member 33 can be arranged at the end of the protrusion 1113 of the second mounting beam 1112 away from the first wall 11 in the thickness direction Z of the first wall, that is, taking the first direction X as the projection direction, the third heat exchange member 33, the protrusion 1113 of the first mounting beam 1111 and the protrusion 1113 of the second mounting beam 1112 are projected onto a projection plane perpendicular to the first direction X, the orthographic projection of one end of the third heat exchange member 33 and the orthographic projection of the protrusion 1113 of the first mounting beam 1111 may intersect, but do not overlap with each other, and the orthographic projection of the other end of the third heat exchange member 33 and the orthographic projection of the protrusion 1113 of the second mounting beam 1112 may intersect, but do not overlap with each other.

[0276] In order to save the installation space of the third heat exchanger 33 in the thickness direction Z of the first wall, the first end plate 22 is arranged on the protrusion 1113 of the first mounting beam 1111, and the second end plate 23 is arranged on the protrusion 1113 of the second mounting beam 1112. In order to reduce the risk of interference between the third heat exchanger 33 and the first end plate 22 and the third heat exchanger 33 and the second end plate 23, thereby reducing the risk of damage to the third heat exchanger 33, in some embodiments, the protrusion 1113 of the first mounting beam 1111 and the protrusion 1113 of the second mounting beam 1112 can be both provided with a first groove portion 1113a, and the third heat exchanger 33 is arranged in the first groove portion 1113a to be connected to the first heat exchanger 31 and the second heat exchanger 32.

[0277] In some embodiments, the first groove 1113a penetrates the protrusion 1113 along the first direction X, that is, the first groove 1113a has two openings, one opening is located on one side of the protrusion 1113 in the first direction X, and the other opening is located on the other side of the protrusion 1113 in the first direction X.

[0278] The third heat exchange member 33 is arranged in the first groove portion 1113a, so that the third heat exchange member 33 can be arranged along the first direction X, and is passed through the protrusion 1113 of the first mounting beam 1111 from the side of the protrusion 1113 away from the first heat exchange member 31 in the first direction X to the side of the protrusion 1113 of the first mounting beam 1111 facing the first heat exchange member 31 in the first direction X, so that the third heat exchange member 33 is connected to the first heat exchange member 31.

[0279] The third heat exchanger 33 can be arranged along the first direction X, and is passed through the protrusion 1113 of the second mounting beam 1112 from the side away from the second heat exchanger 32 in the first direction X to the side facing the second heat exchanger 32 in the first direction X, so that the third heat exchanger 33 is connected to the second heat exchanger 32.

[0280] In some embodiments, the first groove portion 1113 a may be disposed inside the protruding portion 1113 , that is, the first groove portion 1113 a has no opening in the thickness direction Z of the first wall.

[0281] In some embodiments, the first groove 1113a can be arranged at one end of the protrusion 1113 away from the first wall 11 in the thickness direction Z of the first wall, that is, the first groove 1113a is provided with an opening at one end of the protrusion 1113 of the first mounting beam 1111 away from the first wall 11 in the thickness direction Z of the first wall, and the third heat exchange member 33 can move from the opening to the first groove 1113a along the thickness direction Z of the first wall. The first end plate 22 is arranged on the protrusion 1113 of the first mounting beam 1111, and the first end plate 22 closes the opening of the first groove 1113a of the first mounting beam 1111. The second end plate 23 is arranged on the protrusion 1113 of the second mounting beam 1112, and the second end plate 23 closes the opening of the first groove 1113a of the second mounting beam 1112.

[0282] It should be noted that, in the thickness direction Z of the first wall, the size of the third heat exchanger 33 can be smaller than the size of the first groove 1113a, or the size of the third heat exchanger 33 can be equal to the size of the first groove 1113a, so that the third heat exchanger 33 does not exceed the first groove 1113a, thereby reducing the risk of interference between the third heat exchanger 33 and the first end plate 22 and the third heat exchanger 33 and the second end plate 23.

[0283] In some embodiments, the number of the first groove portions 1113 a of a mounting beam 111 may be one, or may be two or more.

[0284] In some embodiments, the number of the first groove portions 1113 a of one mounting beam 111 may be multiple, and the multiple first groove portions 1113 a are arranged along the second direction Y at intervals.

[0285] In some embodiments, one first groove 1113 a may accommodate one third heat exchange element 33 , or may accommodate two or more third heat exchange elements 33 .

[0286] In some embodiments, among the plurality of first grooves 1113a, the size of each first groove 1113a in the second direction Y may be the same, partially the same, or completely different. That is, among the plurality of first grooves 1113a, the number of third heat exchange elements 33 accommodated in each first groove 1113a may be the same, partially the same, or completely different.

[0287] The technical solution of the embodiment of the present application can reduce the space occupied by the third heat exchange member 33 and the protrusion 1113 in the thickness direction Z of the first wall by setting the third heat exchange member 33 in the first groove portion 1113a, thereby saving space, and at the same time allowing the third heat exchange member 33 to pass through the protrusion 1113 in the first direction X, so that the first heat exchange member 31 can be set on the side of the protrusion 1113 of the first mounting beam 1111 away from the multiple battery cells 21, and the second heat exchange member 32 can be set on the side of the protrusion 1113 of the second mounting beam 1112 away from the multiple battery cells 21, so that the first heat exchange member 31 and the second heat exchange member 32 are connected to the third heat exchange member 33 respectively.

[0288] Please refer to Figure 8 In some embodiments, the surface of the first wall 11 facing the battery cell assembly 20 includes a first portion 113 and a second portion 114, the first portion 113 is provided with a second groove portion 1131, at least a portion of the third heat exchange member 33 is disposed in the second groove portion 1131, and the second portion 114 is connected to a plurality of battery cells 21.

[0289] In some embodiments, the surface of the first wall 11 facing the battery cell assembly 20 is the inner surface of the first wall 11. The inner surface of the first wall 11 is the surface forming the accommodation space of the box body 10.

[0290] In some embodiments, the first part 113 is provided with a second groove 1131, the number of the first parts 113 can be multiple, the number of the second parts 114 can be multiple, the first parts 113 and the second parts 114 can be staggered along the second direction Y, that is, the two ends of a first part 113 in the second direction Y are respectively connected to the two second parts 114, and the two ends of a second part 114 in the second direction Y are respectively connected to the two first parts 113.

[0291] It should be noted that the two ends of the inner surface of the first wall 11 in the second direction Y can be two second parts 114. The second part 114 located at the end of the first wall 11 in the second direction Y can be connected to the first part 113 at one end in the second direction Y, and the other end in the second direction Y is the edge of the inner surface of the first wall 11.

[0292] In some embodiments, the first part 113 is provided with a second groove portion 1131, and the number of the first part 113 can be multiple, that is, the number of the second groove portions 1131 can be multiple, and the number of the third heat exchange elements 33 can also be multiple. One second groove portion 1131 can be provided with one third heat exchange element 33, or one second groove portion 1131 can also be provided with multiple third heat exchange elements 33.

[0293] In some embodiments, in the first direction X, the size of the first portion 113 may be the same as the size of the second portion 114 . Also, in the first direction X, the size of the plurality of battery cells 21 may be the same as the size of the first portion 113 .

[0294] In some embodiments, after the third heat exchange member 33 is disposed in the second groove portion 1131 , in the thickness direction Z of the first wall, one end of the third heat exchange member 33 facing the plurality of battery cells 21 may be flush with the second portion 114 .

[0295] In some embodiments, the plurality of battery cells 21 face the surface of the first wall 11 in the thickness direction Z of the first wall, a portion of the surface may contact the second portion 114 , and another portion of the surface may contact the third heat exchange member 33 .

[0296] In some embodiments, the plurality of battery cells 21 may be adhesively connected to the second portion 114 .

[0297] In some embodiments, the plurality of battery cells 21 may be adhesively connected to the third heat exchange element 33 .

[0298] The technical solution of the embodiment of the present application is to set a second groove 1131 in the first part 113 of the first wall 11, and set the third heat exchange member 33 in the second groove 1131, so as to reduce the risk of interference between the third heat exchange member 33 and multiple battery cells 21, thereby reducing the risk of damage to the battery cells 21, thereby improving the reliability of the battery device 1.

[0299] Please refer to Figure 8 In some embodiments, the battery device 1 includes an adhesive layer 70, which connects the plurality of battery cells 21 and the second portion 114 in the thickness direction Z of the first wall. The battery device 1 includes a filler 80, which is disposed between the third heat exchange member 33 and the inner wall of the second groove portion 1131.

[0300] In some embodiments, the adhesive layer 70 may be structural glue.

[0301] In some embodiments, the adhesive layer 70 may have good waterproof and insulating properties.

[0302] In some embodiments, the adhesive layer 70 may be disposed between the surface of the plurality of battery cells 21 facing the first wall 11 in the thickness direction Z of the first wall and the second portion 114 .

[0303] In some embodiments, the adhesive layer 70 may be disposed between a surface of the plurality of battery cells 21 facing the first wall 11 in the thickness direction Z of the first wall and a surface of the third heat exchange member 33 facing the plurality of battery cells 21 in the thickness direction Z of the first wall.

[0304] In some embodiments, the filling member 80 may be made of a foaming material, such as rubber, foam, etc.

[0305] In some embodiments, the filler 80 may have good elasticity. The filler 80 may be first disposed in the second groove 1131 , and after the third heat exchange member 33 is disposed in the second groove 1131 , the filler 80 is compressed so that the filler 80 is disposed between the third heat exchange member 33 and the inner wall of the second groove 1131 .

[0306] Since the adhesive layer 70 may have a certain fluidity, the filler 80 can eliminate the gap between the third heat exchange component 33 and the inner wall of the second groove portion 1131, making it more difficult for the adhesive layer 70 to flow into the second groove portion 1131, thereby reducing the risk of the adhesive layer 70 being lost.

[0307] The technical solution of the embodiment of the present application can help improve the reliability of the battery cells 21 being arranged on the first wall 11 by setting an adhesive layer 70 to connect the multiple battery cells 21 and the second part 114 of the first wall 11. At the same time, the adhesive layer 70 has a certain fluidity, and by setting the filler 80 between the third heat exchange member 33 and the second groove 1131, the probability of the adhesive layer 70 flowing to the second groove 1131 can be reduced, thereby reducing the risk of the adhesive layer 70 running off and causing the reliability of the battery cells 21 and the second part 114 to be reduced, which further helps improve the reliability of the battery cells 21 being arranged on the first wall 11.

[0308] Please refer to Figure 2 In some embodiments, the box body 10 includes a bottom wall 14, a side wall 15 and a box cover 16. The bottom wall 14 and the box cover 16 are arranged opposite to each other. One end of the side wall 15 is arranged around the outer periphery of the bottom wall 14, and the other end forms a second opening. The box cover 16 closes the second opening. The bottom wall 14, the side wall 15 and the box cover 16 jointly define a accommodating cavity for accommodating the battery cell assembly 20. The bottom wall 14 is the first wall 11.

[0309] In some embodiments, there may be a plurality of side walls 15 .

[0310] In some embodiments, the number of the side walls 15 may be four, of which two side walls 15 may be arranged opposite to each other along the first direction X, and the other two side walls 15 may be arranged opposite to each other along the second direction Y. The four side walls 15 are connected to the bottom wall 14 at one end in the thickness direction Z of the first wall, and are enclosed at the other end in the thickness direction Z of the first wall to form an opening, and the box cover 16 closes the opening.

[0311] In some embodiments, the side wall 15 may be the second wall 12 in the above embodiment, and the bottom wall 14 may be the first wall 11 in the above embodiment.

[0312] In some embodiments, the side wall 15 , the bottom wall 14 and the box cover 16 may be connected by welding.

[0313] The technical solution of the embodiment of the present application defines a receiving cavity for receiving the battery cell assembly 20 by the bottom wall 14, the side wall 15 and the box cover 16, which can reduce the risk of damage to the battery cell assembly 20, thereby facilitating the improvement of the reliability of the battery device 1. At the same time, by providing a connector 40 to connect the heat exchange assembly 30 and the bottom wall 14 of the box body 10, the reliability of the installation of the heat exchange assembly 30 is improved.

[0314] An embodiment of the present application further provides an energy storage device, comprising the battery device 1 of any of the above embodiments.

[0315] An embodiment of the present application further provides an electrical device, comprising the battery device 1 of any of the above embodiments, wherein the battery device 1 is used to provide electrical energy to the electrical device.

[0316] Please refer to Figures 2 to 11 In some embodiments, the battery device 1 may include a box body 10, a battery cell assembly 20, a heat exchange assembly 30 and a connector 40. The box body 10 includes a bottom wall 14, a side wall 15 and a box cover 16. The bottom wall 14 and the box cover 16 are arranged opposite to each other. One end of the side wall 15 is arranged around the outer periphery of the bottom wall 14, and the other end forms an opening. The box cover 16 closes the opening. The bottom wall 14, the side wall 15 and the box cover 16 jointly define a receiving cavity for receiving the battery cell assembly 20. The battery cell assembly 20 and the heat exchange assembly 30 are both received in the receiving cavity and are both supported by the bottom wall 14.

[0317] In some embodiments, the heat exchange assembly 30 may include a first heat exchange member 31, a second heat exchange member 32, and a plurality of third heat exchange members 33. The first heat exchange member 31 and the second heat exchange member 32 may be heat exchange tubes, and the third heat exchange member 33 may be a heat exchange plate. The first heat exchange member 31 and the second heat exchange member 32 both extend along the second direction Y, the third heat exchange member 33 extends along the first direction X, and the plurality of third heat exchange members 33 are arranged at intervals along the second direction Y. One end of the plurality of third heat exchange members 33 in the first direction X is connected to the first heat exchange member 31, and the other end is connected to the second heat exchange member 32, so that the internal flow channel of the third heat exchange member 33 is connected to the internal flow channel of the first heat exchange member 31 and the internal flow channel of the second heat exchange member 32.

[0318] The thickness direction Z of the first wall is parallel to the thickness direction of the bottom wall 14. In the thickness direction Z of the first wall, the third heat exchange component 33 is located between the first wall 11 and the plurality of battery cells 21. The temperature of the plurality of battery cells 21 is adjusted by the third heat exchange component 33. By providing the heat exchange component 30 to adjust the temperature of the battery cell assembly 20, the battery device 1 can have better charging and discharging performance and improve the reliability of the battery device 1.

[0319] The first direction X, the second direction Y and the thickness direction Z of the first wall are perpendicular to each other.

[0320] The first heat exchange element 31 is provided with a water inlet 311 and a water outlet 312, so that the heat exchange medium can flow into the third heat exchange element 33 through the first heat exchange element 31, and flow back through the second heat exchange element 32 through the third heat exchange element 33 to the first heat exchange element 31 and out, thereby realizing the circulation of the heat exchange medium, and enabling the third heat exchange element 33 to have a better heat exchange effect, thereby facilitating improving the effect of the third heat exchange element 33 in regulating the temperature of the battery cell 21.

[0321] In some embodiments, the battery cell assembly 20 includes a first end plate 22, a second end plate 23 and a plurality of battery cells 21, the plurality of battery cells 21 are arranged along a first direction X, and the first end plate 22 and the second end plate 23 are respectively disposed at both ends of the plurality of battery cells 21 in the first direction X.

[0322] The first wall 11 is provided with a first mounting beam 1111 and a second mounting beam 1112 . The first mounting beam 1111 and the second mounting beam 1112 are arranged opposite to each other along the first direction X. The first end plate 22 is connected to the first mounting beam 1111 , and the second end plate 23 is connected to the second mounting beam 1112 .

[0323] In some embodiments, the first heat exchange member 31 is located on the first mounting beam 1111, and the first heat exchange member 31 is disposed on a side of the first end plate 22 away from the plurality of battery cells 21 in the first direction X. The second heat exchange member 32 is located on the second mounting beam 1112, and the second heat exchange member 32 is disposed on a side of the second end plate 23 away from the plurality of battery cells 21 in the first direction X.

[0324] In some embodiments, the connector 40 includes two first connectors 41 and two second connectors 42, one end of the first connector 41 is connected to the first heat exchanger 31, and the other end is located on the side of the first heat exchanger 31 away from the first end plate 22 in the first direction X, and is indirectly connected to the first mounting beam 1111, and the connection method is bolt connection. The two first connectors 41 are connected to the two ends of the first heat exchanger 31 in the second direction Y.

[0325] One end of the second connecting member 42 is connected to the second heat exchanger 32, and the other end is located at one end of the second heat exchanger 32 in the second direction Y and is directly connected to the second mounting beam 1112 by bolt connection. The two second connecting members 42 are connected to both ends of the second heat exchanger 32 in the second direction Y.

[0326] By setting a first connector 41 to connect the first heat exchanger 31 and the first wall 11, and setting a second connector 42 to connect the third heat exchanger and the first wall 11, the reliability of the installation of the heat exchange assembly 30 is improved. At the same time, the first heat exchanger 31 is arranged on the side of the first end plate 22 away from the multiple battery cells 21, and the second heat exchanger 32 is arranged on the side of the second end plate 23 away from the multiple battery cells 21, that is, on the projection plane perpendicular to the thickness direction Z of the first wall, the orthographic projection of the first connector 41 and the orthographic projection of the third connector 40 do not overlap with the orthographic projection of the multiple battery cells 21, which can reduce the risk of interference between the connector 40 and the battery cell assembly 20. In addition, the assembly of the battery cell assembly 20 and the heat exchange assembly 30, and the assembly of the heat exchange assembly 30 and the box 10 can be carried out at the same time, which is conducive to improving the assembly efficiency, thereby facilitating the improvement of the production efficiency of the battery device 1.

[0327] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned 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 includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body including a first wall; A battery cell assembly is disposed in the box and supported by the first wall, wherein the battery cell assembly includes a plurality of battery cells, and the plurality of battery cells are arranged along a first direction; A heat exchange component, comprising a first heat exchange element, a second heat exchange element and a plurality of third heat exchange elements, wherein the first heat exchange element and the second heat exchange element both extend along a second direction and are arranged at intervals along the first direction; the third heat exchange element extends along the first direction, and the plurality of third heat exchange elements are arranged at intervals along the second direction, and the plurality of third heat exchange elements are connected to the first heat exchange element and the second heat exchange element at both ends in the first direction, so that the first heat exchange element and the second heat exchange element are respectively connected to the interior of the plurality of third heat exchange elements, and in the thickness direction of the first wall, the third heat exchange element is located between the first wall and the plurality of battery cells, and the first direction, the second direction and the thickness direction of the first wall are perpendicular to each other, and a water inlet and a water outlet are provided on a side of the first heat exchange element that is away from the plurality of third heat exchange elements; A connecting member, comprising a first connecting member and a second connecting member, wherein the first connecting member extends along the first direction, and the second connecting member extends along the second direction; Wherein, a mounting beam is provided on a surface of the first wall facing the battery monomer assembly, the mounting beam comprising a protruding portion and a main body portion, the main body portion is connected to the outer periphery of the protruding portion, the main body portion has a first surface facing away from the first wall, and the protruding portion protrudes from the first surface; The number of the mounting beams is two, and the two mounting beams include a first mounting beam and a second mounting beam, and the first mounting beam and the second mounting beam are arranged at intervals along the first direction; the protrusion of the first mounting beam is located on one side of the plurality of battery cells in the first direction, the first heat exchange member is arranged on the main body of the first mounting beam, and is located on a side of the protrusion of the first mounting beam away from the plurality of battery cells, the protrusion of the second mounting beam is located on the other side of the plurality of battery cells in the first direction, and the second heat exchange member is arranged on the main body of the second mounting beam, and is located on a side of the protrusion of the second mounting beam away from the plurality of battery cells; The first connecting member connects the first heat exchange member and the first wall, the second connecting member connects the second heat exchange member and the main body of the second mounting beam, and on a projection plane perpendicular to a thickness direction of the first wall, an orthographic projection of the connecting member does not overlap with an orthographic projection of the battery cell assembly.

2. The battery device according to claim 1, characterized in that: The first connecting member includes a first section, a second section and a third section connected in sequence, the first section and the third section extend along the first direction, and the first section and the third section are arranged in parallel, the second section connects the first section and the third section, the first section is connected to a side of the first heat exchange member away from the first wall in the thickness direction of the first wall, and the third section is connected to the first wall.

3. The battery device according to claim 2, characterized in that: The battery device comprises a mounting seat and a first fastener, wherein the mounting seat is arranged on a surface of the first wall facing the battery monomer assembly; The third section is provided with a first mounting hole, the first mounting hole passes through the two end faces of the third section in the thickness direction of the first wall, the mounting seat is provided with a second mounting hole corresponding to the first mounting hole, and the first fastener passes through the first mounting hole and is connected to the second mounting hole.

4. The battery device according to claim 1, characterized in that: The heat exchange component comprises a water inlet pipe and a water outlet pipe, one end of the water inlet pipe is connected to the water inlet, and one end of the water outlet pipe is connected to the water outlet.

5. The battery device according to claim 3, characterized in that: The second connecting member includes a fourth section, a fifth section and a sixth section connected in sequence, the fourth section and the sixth section extend along the second direction, and the fourth section and the sixth section are arranged in parallel, the fifth section connects the fourth section and the sixth section, the fourth section is connected to a side of the second heat exchange member away from the first wall in the thickness direction of the first wall, and the sixth section is connected to the main body of the second mounting beam.

6. The battery device according to claim 5, characterized in that: The battery device includes a second fastener; The sixth section is provided with a third mounting hole, and the third mounting hole passes through the two end faces of the sixth section in the thickness direction of the first wall. The main body of the second mounting beam is provided with a fourth mounting hole corresponding to the third mounting hole, and the second fastener passes through the third mounting hole and is connected to the fourth mounting hole.

7. The battery device according to claim 6, characterized in that: The material of the first connecting member, the material of the second connecting member, the material of the mounting seat, and the material of the second mounting beam are all metal materials, the material of the first connecting member is different from the material of the mounting seat, and the material of the second connecting member is different from the material of the second mounting beam; A first protective layer is disposed on the outer surface of the first fastener, and a second protective layer is disposed on the outer surface of the second fastener. The material of the first protective layer and the material of the second protective layer are anti-potential corrosion materials.

8. The battery device according to claim 6, characterized in that: The first connecting member is provided with a third protective layer, and the third protective layer is arranged between the first connecting member and the first fastener; the second connecting member is provided with a fourth protective layer, and the fourth protective layer is arranged between the second connecting member and the second fastener; The material of the third protective layer and the material of the fourth protective layer are both anti-potential corrosion materials.

9. The battery device according to claim 1, characterized in that: The battery cell assembly comprises a first end plate and a second end plate, wherein the first end plate and the second end plate are respectively connected to two sides of the plurality of battery cells in the first direction; The first end plate is connected to the protruding portion of the first mounting beam, and the second end plate is connected to the protruding portion of the second mounting beam.

10. The battery device according to claim 9, characterized in that: The protrusion is a hollow structure, a first opening is formed on a side of the protrusion facing the first wall, the first wall closes the first opening and forms a cavity with the protrusion; The battery device includes a third fastener and a fourth fastener, the first end plate is arranged at an end of the protrusion of the first mounting beam away from the first wall in the thickness direction of the first wall, the third fastener connects the first end plate and the protrusion of the first mounting beam, and one end of the third fastener is arranged in the cavity of the first mounting beam, the second end plate is arranged at an end of the protrusion of the second mounting beam away from the first wall in the thickness direction of the first wall, the fourth fastener connects the second end plate and the protrusion of the second mounting beam, and one end of the fourth fastener is arranged in the cavity of the second mounting beam.

11. The battery device according to claim 1, characterized in that: The protrusion has a plurality of first grooves, the plurality of first grooves are spaced apart along the second direction, the first grooves penetrate the protrusion along the first direction, at least a portion of the third heat exchange element is disposed in the first grooves, and at least one third heat exchange element is disposed in one of the first grooves.

12. The battery device according to claim 1, characterized in that: The surface of the first wall facing the battery cell assembly includes a first portion and a second portion, the first portion is provided with a second groove, at least a portion of the third heat exchange member is disposed in the second groove, and the second portion is connected to the plurality of battery cells.

13. The battery device according to claim 12, characterized in that: The battery device includes an adhesive layer, and in the thickness direction of the first wall, the adhesive layer connects the plurality of battery cells and the second portion; The battery device includes a filling member disposed between the third heat exchange member and an inner wall of the second groove portion.

14. The battery device according to claim 1, characterized in that: The box body includes a bottom wall, a side wall and a top wall, the bottom wall and the top wall are arranged opposite to each other, one end of the side wall is arranged around the outer periphery of the bottom wall, and the other end forms a second opening, the top wall closes the second opening, the bottom wall, the side wall and the top wall jointly define a accommodating cavity for accommodating the battery cell assembly, and the bottom wall is the first wall.

15. An energy storage device, characterized in that: Comprising the battery device according to any one of claims 1-14.

16. An electrical device, characterized in that: It comprises the battery device as described in any one of claims 1 to 14, wherein the battery device is used to provide electrical energy to the electrical device.

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