Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment. The battery device comprises a box body, a battery monomer, a heat exchange piece and a conductive fastening assembly, the box body comprises wall parts and connecting beams, the wall parts define a containing cavity, and the connecting beams are connected to the sides, facing the containing cavity, of the wall parts. The battery monomers are arranged in the accommodating cavity; the heat exchange piece is arranged in the accommodating cavity and is configured to exchange heat with the battery monomers; the conductive fastening assembly connecting beam and the heat exchange piece are fixedly connected through a conductive fastening assembly, and the conductive fastening assembly is configured to enable the box body and the heat exchange piece to be electrically connected. At least parts of the heat exchange piece and the connecting beam are provided with gaps in the height direction of the box body, and part of the conductive fastening assembly is arranged in the gaps. The reliability of the battery device is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a battery device and an electrical equipment. Background Art

[0002] With the development of new energy technologies, battery devices are being used more and more widely, for example, in mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools.

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

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which are beneficial to improving the reliability of the battery device.

[0005] In a first aspect, the present application provides a battery device, comprising: a box body, comprising a wall portion and a connecting beam, the wall portion enclosing a accommodating cavity, and the connecting beam being connected to a side of the wall portion facing the accommodating cavity; a battery cell, arranged in the accommodating cavity; a heat exchanger, arranged in the accommodating cavity and configured to exchange heat with the battery cell; a conductive fastening assembly, the connecting beam and the heat exchanger being fixedly connected via the conductive fastening assembly, the conductive fastening assembly being configured to electrically connect the box body and the heat exchanger; the heat exchanger and the connecting beam having at least partially a gap in the height direction of the box body, and part of the conductive fastening assembly being arranged in the gap.

[0006] In some embodiments of the first aspect, the housing and the heat exchanger can be electrically connected via a conductive fastening assembly to achieve an equipotential connection between the housing and the heat exchanger, which is beneficial to improving the safety performance of the battery device. In addition, the housing and the heat exchanger can also be fixedly connected via a conductive fastening assembly, which is beneficial to improving the stability of the connection between the three, thereby ensuring the stability of the equipotential connection between the housing and the heat exchanger, and further improving the reliability of the battery device.

[0007] The connecting beam and the heat exchanger can be connected through a conductive fastening assembly to electrically connect the connecting beam and the heat exchanger, and then electrically connect the box body and the heat exchanger, which can not only meet the reliability of the equipotential connection between the box body and the heat exchanger, but also reduce the impact on the wall strength, thereby ensuring the structural strength of the box body.

[0008] By arranging part of the conductive fastening assembly in the gap, it is convenient to connect the heat exchange component and the connecting beam through the conductive fastening assembly.

[0009] In some embodiments, the connecting beam includes a first beam and a second beam arranged to intersect each other, the first beam divides the accommodating cavity into at least two sub-cavities, the battery cell is arranged in the sub-cavity and supported by the second beam, and at least one of the first beam and the second beam is connected to the heat exchange member through a conductive fastening assembly. This arrangement is conducive to improving the structural strength of the box body and the flexibility of use of the battery device.

[0010] In some embodiments, the conductive fastening assembly includes an adapter bracket and a fastener, the adapter bracket is located in the gap and connected to the heat exchange element, and the fastener is connected to the adapter bracket and the connecting beam.

[0011] In the above solution, the fasteners are connected to the adapter bracket and the connecting beam so that the heat exchange element and the connecting beam are fixedly connected and electrically connected, which helps to reduce the difficulty of assembly.

[0012] In some embodiments, the adapter bracket has a first hole, and the fastener is inserted through the first hole. This arrangement is conducive to improving the connection stability between the fastener and the adapter bracket, thereby facilitating improving the reliability of the electrical connection between the connecting beam and the heat exchanger.

[0013] In some embodiments, the heat exchanger has a groove connected to the gap, and in the height direction, the orthographic projection of the fastener located in the gap falls into the groove. This arrangement can prevent the fastener from interfering with the heat exchanger, which is conducive to ensuring the reliability of the heat exchanger.

[0014] In some embodiments, the adapter bracket includes an adapter portion and a convex portion connected and arranged, the adapter portion is connected to the heat exchanger, the convex portion protrudes from the adapter portion in the height direction, and the fastener is connected to the convex portion. This arrangement is convenient for processing and helps reduce stress concentration of the adapter bracket.

[0015] In some embodiments, the surface of the heat exchanger has a first insulating portion and a first positioning portion, the first insulating portion is arranged around the first positioning portion, the first insulating portion is provided with a first insulating layer, and the adapter bracket is connected to the first positioning portion and is electrically connected to the heat exchanger through the first positioning portion. This arrangement facilitates the effectiveness of the electrical connection between the adapter bracket and the heat exchanger.

[0016] In some embodiments, the conductive fastening assembly includes an adapter plate and a fastener, the adapter plate is connected to the side of the connecting beam facing toward or away from the heat exchanger, and the fastener is connected to the adapter plate and the heat exchanger.

[0017] In the above solution, the fasteners are connected to the heat exchange element and the adapter plate so that the heat exchange element and the connecting beam are fixedly connected and electrically connected, which helps to reduce the difficulty of assembly.

[0018] In some embodiments, the connecting beam has a second hole, and the fastener is inserted through the second hole. By setting in this way, the connection stability between the fastener and the adapter is improved, thereby facilitating the improvement of the reliability of the electrical connection between the connecting beam and the heat exchanger.

[0019] In some embodiments, the adapter plate includes a first connection portion and a second connection portion, the fastener is connected to the first connection portion, and the first connection portion and the second connection portion have different areas. By setting in this way, the layout is reasonable, which is conducive to reducing the area occupied by the adapter plate on the connecting beam.

[0020] In some embodiments, the surface of the connecting beam has a second insulating portion and a second positioning portion, the second insulating portion is arranged around the second positioning portion, the second insulating portion is provided with a second insulating layer, and the adapter is connected to the second positioning portion and electrically connected to the connecting beam through the second positioning portion. This arrangement facilitates the effectiveness of the electrical connection between the adapter and the connecting beam.

[0021] In some embodiments, the conductive fastening assembly includes at least one of a bolt, a rivet, a nut, and a screw. This arrangement can make the electrical connection between the box and the heat exchange element more reliable and also help improve the flexibility of the battery device.

[0022] In some embodiments, the number of the conductive fastening components is set to at least two, and the at least two conductive fastening components are spaced apart from each other. By setting in this way, the reliability of the electrical connection between the box body and the heat exchange element can be further ensured.

[0023] In a second aspect, the present application provides an electrical device, comprising a battery device provided according to any embodiment of the first aspect, the battery device being used to store or provide electrical energy.

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0027] Figure 2A schematic diagram of the structure of a battery cell assembly provided in some embodiments of the present application;

[0028] Figure 3 A schematic diagram of an exploded structure of a battery device provided in some embodiments of the present application;

[0029] Figure 4 A schematic diagram of an exploded structure of a battery cell provided in some embodiments of the present application;

[0030] Figure 5 A schematic diagram of a partial structure of a battery device provided in some embodiments of the present application;

[0031] Figure 6 A partial cross-sectional view of a battery device provided in some embodiments of the present application;

[0032] Figure 7 Based Figure 5 Enlarged schematic diagram of point P in the middle.

[0033] The reference numerals of the specific embodiments are as follows:

[0034] 100. Vehicle; 1. Battery device; 2. Controller; 3. Motor; 4. Battery cell assembly;

[0035] 10, box body; 110, first box body; 120, second box body; 101, accommodating cavity; 1011, sub-cavity; 102, gap;

[0036] 11. wall portion; 12. connecting beam; 121. first beam; 122. second beam; 1201. second insulating portion; 1202. second positioning portion;

[0037] 20. Battery cell; 21. Shell; 211. End cap; 212. Shell; 22. Electrode assembly; 23. Electrode terminal; 24. Pressure relief mechanism;

[0038] 30. heat exchange element; 301. first insulating portion; 302. first positioning portion; 303. groove;

[0039] 40. Conductive fastening assembly; 41. Fastener; 411. Rivet nut; 412. Bolt; 42. Adapter bracket; 402. First hole; 421. Adapter portion; 422. Protrusion; 43. Adapter sheet; 403. Third hole; 431. First connecting portion; 432. Second connecting portion;

[0040] X-height direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0041] 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 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.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings 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.

[0043] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places 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.

[0044] 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.

[0045] 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.

[0046] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0047] The term “plurality” used in this application refers to two or more (including two).

[0048] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of battery devices, the market demand is also constantly expanding.

[0049] 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.

[0050] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0051] In order to achieve heat dissipation and cooling of battery cells, water cooling plates and other structures are usually installed inside the battery device to keep the temperature of the battery cells within a safe range. During the charging and discharging process of the battery cells, current is likely to flow between the water cooling plate and the battery device box, which may cause leakage and other phenomena, resulting in the risk of electric shock.

[0052] Based on the above technical problems, the present application provides a battery device, including a box, a battery cell, a heat exchanger and a conductive fastening assembly. The box includes a wall portion and a connecting beam, the wall portion encloses a receiving cavity, and the connecting beam is connected to the side of the wall portion facing the receiving cavity. The battery cell is arranged in the receiving cavity. The heat exchanger is arranged in the receiving cavity and is configured to exchange heat with the battery cell. The conductive fastening assembly connecting beam and the heat exchanger are fixedly connected by a conductive fastening assembly, and the conductive fastening assembly is configured to electrically connect the box and the heat exchanger. The heat exchanger and the connecting beam have a gap at least partially in the height direction of the box, and part of the conductive fastening assembly is arranged in the gap.

[0053] The box body and the heat exchanger can be electrically connected via a conductive fastening assembly to achieve equipotential connection between the box body and the heat exchanger, which is beneficial to improving the safety performance of the battery device. In addition, the connecting beam of the box body and the heat exchanger can also be fixedly connected via a conductive fastening assembly, which is beneficial to improving the stability of the connection between the three, thereby ensuring the stability of the equipotential connection between the box body and the heat exchanger, and further improving the reliability of the battery device.

[0054] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using 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.

[0055] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices using battery devices. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0056] For example, Figure 1 As shown, Figure 1 This is a structural schematic diagram of a vehicle 100 according to an embodiment of the present application. The vehicle 100 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 3, a controller 2 and a battery device 1 may be provided inside the vehicle 100. The controller 2 is used to control the battery device 1 to power the motor 3. For example, a battery device 1 may be provided at the bottom, front or rear 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, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 100. In another embodiment of the present application, the battery device 1 may not only be used as an operating power source for the vehicle 100, but also as a driving power source for the vehicle 100, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100.

[0057] See also Figure 2 and Figure 3 The battery apparatus 1 mentioned in the embodiment of the present application may include one or more battery cell assemblies 4 for providing voltage and capacity. The battery cell assembly 4 may include a plurality of battery cells 20, and the plurality of battery cells 20 are connected in series, in parallel or in mixed connection through a busbar component.

[0058] In some embodiments, the battery cell assembly 4 is generally formed by arranging a plurality of battery cells 20 .

[0059] As an example, the battery cell assembly 4 may be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells 20 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 20 by a cable tie.

[0060] See also Figure 4The battery cell 20 includes a housing 21 , an electrode assembly 22 and an electrode terminal 23 .

[0061] The housing 21 is a component used to form an internal environment of the battery cell 20. The internal environment formed by the housing 21 can be used to accommodate the electrode assembly 22, and can also be used to accommodate electrolyte and other components. Optionally, the housing 21 can be made of, but not limited to, metal or non-metal materials. For example, the metal material can be copper, aluminum or stainless steel, etc.; the non-metal material can be polyethylene, polypropylene or polyvinyl chloride, etc.

[0062] For example, the housing 21 may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0063] In some embodiments, the housing 21 may be a sealed structure or a non-sealed structure. As an example, when the housing 21 is a non-sealed structure, the housing 21 plays a role in protecting the electrode assembly 22, and a sealed bag is also included between the housing 21 and the electrode assembly 22, and the sealed bag is used to encapsulate the electrode assembly 22 and the electrolyte. Specifically, the sealed bag can be a bag-shaped insulating member or an aluminum-plastic film. When the housing 21 is a sealed structure, it is used to encapsulate the electrode assembly 22, the electrolyte and other components.

[0064] In some embodiments, the housing 21 includes an end cap 211 and a shell 212. The shell 212 is provided with an opening, and the end cap 211 is provided to cover the opening. The shell 212 may be provided with one or more openings. One or more end caps 211 may also be provided.

[0065] The shape of the shell 21 can be determined according to the specific shape of the electrode assembly 22. For example, if the electrode assembly 22 is a rectangular parallelepiped structure, a rectangular shell can be selected; if the electrode assembly 22 is a cylindrical structure, a cylindrical shell can be selected.

[0066] The electrode assembly 22 is a component in the battery cell 20 where electrochemical reactions occur. The housing 21 may contain one or more electrode assemblies 22 .

[0067] In some embodiments, the shape of the electrode assembly 22 can be cylindrical, flat, or polygonal.

[0068] The electrode assembly 22 may be a wound structure, a laminated structure, or a mixed structure of a wound structure and a laminated structure.

[0069] The electrode assembly 22 includes a positive electrode, a negative electrode, and a separator, and the separator is disposed between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell 20, active ions (such as lithium ions) are embedded and released back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0070] In some embodiments, at least one electrode terminal 23 is disposed on the housing 21, and the electrode terminal 23 is electrically connected to the tab of the electrode assembly 22. The electrode terminal 23 may be directly connected to the tab, or may be indirectly connected to the tab through a current collecting member.

[0071] The electrode terminal 23 can be used to electrically connect to the electrode assembly 22 to output or input the electrical energy of the battery cell 20. The electrode terminal 23 can be electrically connected to the electrode assembly 22 by connecting to the tab. The tab electrically connected to the electrode terminal 23 can be a positive tab or a negative tab.

[0072] In some embodiments, a pressure relief mechanism 24 is disposed on the housing 21 . The pressure relief mechanism 24 is used to discharge the internal gas of the battery cell 20 .

[0073] As an example, the battery cell 20 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery.

[0074] like Figure 3 As shown, in some embodiments, the battery device 1 may be a battery pack, which includes a box 10 and one or more battery cell assemblies 4 , wherein the battery cell assemblies 4 are accommodated in the box 10 .

[0075] As an example, the battery cell assembly 4 may be a battery module, and the battery cell assembly 4 may be accommodated in the box body 10 by fixing the battery module in the box body 10 .

[0076] As an example, the battery cell assembly 4 may also be accommodated in the case 10 by directly fixing the plurality of battery cells 20 to the case 10 .

[0077] As an example, the box 10 may include a first box 110 and a second box 120. The first box 110 and the second box 120 are buckled together to form a receiving chamber 101, so that a closed space is formed inside the box 10 to accommodate the battery cell assembly 4. The closed here means covered or closed, which can be sealed or unsealed. The first box 110 can be a top cover or a bottom plate.

[0078] As an example, the box body 10 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 10 to accommodate the battery cell assembly 4.

[0079] In some embodiments, the box 10 may be a part of the chassis structure of the vehicle 100. For example, part of the box 10 may become at least a part of the floor of the vehicle 100, or part of the box 10 may become at least a part of the cross beam and longitudinal beam of the vehicle 100.

[0080] The box body 10 may be a simple three-dimensional structure such as a single cuboid or a cylinder, or may be a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids or cylinders, which is not limited in the embodiments of the present application.

[0081] Specifically, the box body 10 can be a metal shell made of alloy steel, alloy aluminum, etc., or a composite material shell made of metal and polypropylene, etc.

[0082] Please also read Figures 3 to 7 According to an embodiment of the present application, a battery device 1 is provided, comprising a housing 10, a battery cell 20, a heat exchanger 30 and a conductive fastening assembly 40. The housing 10 comprises a wall portion 11 and a connecting beam 12, the wall portion 11 encloses a receiving cavity 101, and the connecting beam 12 is connected to a side of the wall portion 11 facing the receiving cavity 101. The battery cell 20 is disposed in the receiving cavity 101. The heat exchanger 30 is disposed in the receiving cavity 101 and is configured to exchange heat with the battery cell 20. The connecting beam 12 and the heat exchanger 30 are fixedly connected by a conductive fastening assembly 40, and the conductive fastening assembly 40 is configured to electrically connect the housing 10 and the heat exchanger 30. The heat exchanger 30 and the connecting beam 12 have a gap 102 at least partially in the height direction X of the housing 10, and part of the conductive fastening assembly 40 is disposed in the gap 102.

[0083] In the embodiment of the present application, the height direction X, the second direction Y and the third direction Z are respectively arranged to intersect, wherein the height direction X can be the height direction X of the box 10, the second direction Y can be the width direction of the box 10, and the third direction Z can be the length direction of the box 10; or, the second direction Y can be the length direction of the box 10, and the third direction Z can be the width direction of the box 10.

[0084] The box body 10 is used to accommodate and protect the battery cells 20 and the heat exchanger 30. The battery cells 20 and the heat exchanger 30 can be placed in the accommodating cavity 101 enclosed by the box body 10. Specifically, the wall portion 11 is used to protect the battery cells 20 and the heat exchanger 30 in the accommodating cavity 101. The wall portion 11 can be a wall of the first box body 110 or a wall of the second box body 120. The connecting beam 12 is disposed in the accommodating cavity 101 and connected to the wall portion 11. The connecting beam 12 can support the wall portion 11 to improve the overall structural strength of the box body 10.

[0085] The heat exchanger 30 is used to perform heat exchange with the battery cell 20. It can be understood that the heat between the heat exchanger 30 and the battery cell 20 can be transferred between them. For example, the heat exchanger 30 is directly in contact with the battery cell 20 to achieve contact heat exchange, or a heat conductive structure (such as heat conductive glue) is set between the heat exchanger 30 and the battery cell 20 for heat exchange. Specifically, the heat exchanger 30 dissipates heat, cools or heats the battery cell 20, controls the temperature of the battery cell 20 within a suitable range, and improves the service life and safety performance of the battery cell 20. In addition, when a battery cell 20 has thermal runaway, the heat generated by the thermal runaway battery cell 20 will be taken away by the heat exchanger 30 in contact with it, reducing the temperature of the thermal runaway battery cell 20, avoiding the thermal runaway problem of the adjacent battery cell 20, thereby ensuring the safety performance of the battery cell 20. The heat exchanger 30 can be used to perform thermal management on the battery cell 20 to ensure that the battery cell 20 is within a suitable temperature range, thereby ensuring the safety performance of the battery device 1.

[0086] The box 10 is provided to contain the battery cell 20 to limit its position, which is conducive to ensuring the stability of the operation of the battery cell 20. In addition, the heat exchanger 30 capable of heat exchange with the battery cell 20 is provided so that the battery cell 20 can operate within a preset temperature range, thereby improving the reliability of the battery cell 20.

[0087] The conductive fastening assembly 40 is used to electrically connect the box body 10 and the heat exchanger 30 to ensure the equipotential connection between the heat exchanger 30 and the box body 10, thereby ensuring the safety performance of the battery device 1. In addition, the conductive fastening assembly 40 is fixedly connected to the connecting beam 12 of the box body 10 and is also fixedly connected to the heat exchanger 30 to connect the box body 10 and the heat exchanger 30 as a whole, which is beneficial to improve the stability of the conductive connection between the box body 10 and the heat exchanger 30.

[0088] Among them, "fixed connection" means that after the connecting beam 12 and the heat exchanger 30 are fixed by the conductive fastening assembly 40, there is no relative movement of the connection. "Equipotential connection" means that it can prevent people from suffering electric shock, protect human safety, prevent static electricity hazards, and ensure the normal operation of the electrical system in the battery device 1. In the case of equipotential connection, all exposed metal parts have reached the same potential through equipotential connection. When the human body touches these metal parts, no current will be generated, thereby avoiding electric shock accidents and protecting personnel safety.

[0089] By configuring in the above manner, the connecting beam 12 and the heat exchanger 30 can be fixedly connected through the conductive fastening assembly 40, so that the connecting beam 12 and the heat exchanger 30 are electrically connected, and then the box body 10 and the heat exchanger 30 are electrically connected. This can not only meet the equipotential connection of the box body 10 and the heat exchanger 30, but also reduce the impact on the strength of the wall 11, so that the wall 11 has sufficient strength to resist external impact or collision, so as to ensure the structural strength of the box body 10, and when the box body 10 is impacted or collided from the outside, the impact force will not directly act on the conductive fastening assembly 40, thereby reducing the risk of connection failure, which is beneficial to improving the reliability of the equipotential connection between the box body 10 and the heat exchanger 30, thereby helping to improve the reliability of the battery device 1.

[0090] The heat exchanger 30 as a whole and the connecting beam 12 as a whole have a gap 102 in the height direction X, or a portion of the heat exchanger 30 and a portion of the connecting beam 12 have a gap 102 in the height direction X. This arrangement facilitates assembly of the conductive fastening assembly 40 so that the heat exchanger 30 and the connecting beam 12 can be connected via the conductive fastening assembly 40.

[0091] The conductive fastening assembly 40 may include a fastening component with conductive properties. The conductive fastening assembly 40 can not only provide a conductive path between the box body 10 and the heat exchanger 30, thereby achieving equipotential connection between the two and improving the safety of the battery device 1, but also fasten the connecting beam 12 of the box body 10 and the heat exchanger 30 to improve the connection reliability between the two.

[0092] In the related art, elastic components such as springs are used to achieve electrical connection between internal components of the battery device 1. This connection method is usually pressure contact, which is unreliable and may also increase contact resistance and affect conductive efficiency.

[0093] The embodiment of the present application is different from that. In the embodiment of the present application, a conductive fastening assembly 40 is provided to fix the connecting beam 12 and the heat exchanger 30 together, thereby fixing the housing 10 and the heat exchanger 30 together, which is beneficial to improving the reliability and stability of the connection between the housing 10 and the heat exchanger 30. The conductive fastening assembly 40 can also electrically connect the housing 10 and the heat exchanger 30, thereby improving the stability and reliability of the equipotential connection between the housing 10 and the heat exchanger 30.

[0094] In summary, the battery device 1 provided in some embodiments of the present application, by setting a conductive fastening assembly 40 to fix and electrically connect the case 10 and the heat exchanger 30, is beneficial to improving the reliability of the connection between the case 10 and the heat exchanger 30, thereby improving the reliability of the equipotential connection between the case 10 and the heat exchanger 30, and is beneficial to improving the safety performance and reliability of the battery device 1.

[0095] Specifically, when the battery device 1 is applied to the vehicle 100, the box 10 and the heat exchanger 30 are at the same potential, and the box 10 and the frame of the vehicle 100 are connected at the same potential, and the frame is grounded. By setting it in this way, the battery device 1 and the metal parts of the vehicle 100 can be connected at the same potential to reduce the risk of electric shock, prevent safety problems from occurring in the battery device 1, and help improve the protection of people on the vehicle.

[0096] In some embodiments, the connecting beam 12 and the heat exchange member 30 are detachably fixedly connected by a conductive fastening assembly 40. Figure 6 As shown, optionally, the conductive fastening group may include a fastener 41 , and the fastener 41 includes but is not limited to any one of a screw, a spline, a wedge pin, a bolt, a screw, a rivet, and the like.

[0097] Optionally, the conductive fastening assembly 40 includes a fastener 41 , which is fixedly connected to the connecting beam 12 and the heat exchange element 30 , and is electrically connected to the housing 10 and the heat exchange element 30 .

[0098] Optionally, the conductive fastening assembly 40 may further include an adapter, at least one of the connecting beam 12 and the heat exchange component 30 is connected to the adapter, and the fastener 41 is fixedly connected to the adapter so as to be fixedly connected to at least one of the connecting beam 12 and the heat exchange component 30.

[0099] Specifically, both the connecting beam 12 and the heat exchanger 30 are connected with adapters, and the fastener 41 fixedly connects the adapter provided on the connecting beam 12 and the adapter provided on the heat exchanger 30 to be fixedly connected to the connecting beam 12 and the heat exchanger 30 .

[0100] In some embodiments, the connection beam 12 and the heat exchange member 30 may also be non-detachably fixedly connected via the conductive fastening assembly 40. Optionally, the connection beam 12 and the heat exchange member 30 are welded, riveted, or tenoned via the conductive fastening assembly 40.

[0101] Optionally, the conductive fastening assembly 40 may be connected to the heat exchange element 30 and the first box body 110 . Of course, it may also be connected to the heat exchange element 30 and the second box body 120 .

[0102] In some embodiments, the heat exchange element 30 is disposed in contact with the battery cell 20. In other embodiments, there is a gap between the heat exchange element 30 and the battery cell 20.

[0103] Optionally, the number of heat exchangers 30 can be one, two, or more. The heat exchangers 30 can be configured as a plate structure or a tube structure. For example, the heat exchangers 30 are configured as a plate, which is beneficial to increase the area for heat exchange with the battery cell 20 and improve the thermal management efficiency of the battery cell 20.

[0104] A medium flow channel may be provided in the heat exchange element 30 so that a heat exchange medium (such as water, air, phase change material, etc.) can flow in the medium flow channel to exchange heat with the battery cell 20 , so that the heat exchange element 30 completes the thermal management of the battery cell 20 .

[0105] The number of the connecting beams 12 can be one, two, or more. Optionally, the number of the connecting beams 12 is at least two, so as to better improve the overall strength of the box body 10.

[0106] The connecting beam 12 may be extended in any direction. Optionally, the connecting beam 12 may extend in the second direction Y or in the third direction Z.

[0107] In other embodiments, the conductive fastening assembly 40 may also be fixedly connected to the wall portion 11 and the heat exchange element 30 .

[0108] In some embodiments, there is one heat exchange element 30 , which is disposed on the same side of the battery cell 20 and the connecting beam 12 along the height direction X, specifically below the battery cell 20 and the connecting beam 12 along the height direction X.

[0109] By arranging in this manner, on the basis of being able to satisfy the heat exchange between the heat exchange component 30 and the battery cell 20, the number of heat exchange components 30 used can be reduced to reduce costs. In addition, no heat exchange component 30 is sandwiched between two adjacent battery cells 20, which is beneficial to increasing the number of battery cells 20 accommodated in the accommodating cavity 101, thereby facilitating the improvement of the energy density of the battery device 1, and also helping to reduce the difficulty of assembly and improve the assembly efficiency. In addition, by arranging in this manner, the connecting beam 12 can also be connected to the side with a larger area of ​​the heat exchange component 30 by setting a conductive fastening component 40, which is convenient for assembly.

[0110] Among them, the heat exchanger 30 can be a plate-like structure, and the projection area of ​​the heat exchanger 30 in the height direction X is larger than its projection area in the second direction Y and the third direction Z. That is to say, the heat exchanger 30 has sufficient installation space on the side surface facing the connecting beam 12 in the height direction X to be assembled and fixed with the connecting beam 12.

[0111] In some other optional embodiments, a plurality of heat exchange components 30 are provided, and a heat exchange component 30 is sandwiched between each two adjacent battery cells 20. By arranging in this way, the heat exchange component 30 can perform thermal management on two battery cells 20 at the same time, which is beneficial to improving the thermal management efficiency of the heat exchange component 30 and the thermal management effect of the heat exchange component 30 on the battery cells 20.

[0112] Please continue reading Figure 5 and Figure 6In some embodiments, the connecting beam 12 includes a first beam 121 and a second beam 122 that are intersectingly arranged, the first beam 121 divides the accommodating cavity 101 into at least two sub-cavities 1011, the battery cell 20 is arranged in the sub-cavity 1011 and supported by the second beam 122, and at least one of the first beam 121 and the second beam 122 is connected to the heat exchange component 30 through a conductive fastening assembly 40.

[0113] The first beam 121 is used to divide the accommodating cavity 101 into at least two sub-cavities 1011 for accommodating the battery cell 20, and the second beam 122 is used to support the battery cell 20. The battery cell 20 can be protected by the first beam 121, the second beam 122 and the wall portion 11 at the same time to further improve the safety performance of the battery cell 20, thereby further improving the reliability of the battery device 1.

[0114] “Intersecting arrangement” means that there is a certain angle between the extension direction of the first beam 121 and the extension direction of the second beam 122. Specifically, the first beam 121 can be extended along the third direction Z, and the second beam 122 can be extended along the second direction Y. The extension direction of the first beam 121 and the extension direction of the second beam 122 are both perpendicular to the height direction X.

[0115] The battery device 1 provided in some embodiments of the present application is configured in the above manner, which is beneficial to improving the structural strength of the box body 10 and also beneficial to improving the use flexibility of the battery device 1.

[0116] The number of the first beams 121 may be one, two, or even more than one, and the number of the second beams 122 may be one, two, or even more than one.

[0117] Exemplarily, the number of the first beam 121 and the number of the second beam 122 are both set to two, which can not only improve the structural strength of the box body 10, but also reduce the impact on the overall weight of the box body 10 to achieve a lightweight design.

[0118] Optionally, the first beam 121 is extended along the third direction Z, and the two ends of the first beam 121 along the third direction Z are respectively connected to the second beam 122 and the wall portion 11, and the second beam 122 is extended along the second direction Y, and the two ends of the second beam 122 along the second direction Y are respectively connected to the wall portion 11.

[0119] As an example, the first beam 121 may be integrally formed with the second beam 122 .

[0120] As an example, the first beam 121 may also be separately provided and connected to the second beam 122 .

[0121] In some embodiments, in the height direction X, the height position of the surface of the first beam 121 facing away from the heat exchanger 30 is higher than the height position of the surface of the second beam 122 facing away from the heat exchanger 30. This arrangement facilitates the first beam 121 to separate the battery cells 20, and also facilitates the second beam 122 to support the battery cells 20, with a reasonable layout and space saving.

[0122] like Figure 6 As shown, in some embodiments, the conductive fastening assembly 40 includes an adapter bracket 42 and a fastener 41 . The adapter bracket 42 is located in the gap 102 and connected to the heat exchange element 30 . The fastener 41 is connected to the adapter bracket 42 and the connecting beam 12 .

[0123] The adapter bracket 42 may be made of, but not limited to, aluminum, stainless steel, or other metal materials. The adapter bracket 42 is disposed in the gap 102, that is, disposed on the side of the heat exchanger 30 facing the connecting beam 12 along the height direction X, which is conducive to saving space and reducing the impact on the strength of the heat exchanger 30.

[0124] The fastener 41 may be completely located in the gap 102 , or may be partially located in the gap 102 and the other partially located on the side of the connecting beam 12 along the height direction X facing away from the heat exchange element 30 .

[0125] In the related art, in order to achieve electrical connection between the heat exchanger and the casing, it is necessary to connect the component that achieves the electrical connection to a conductive position on the heat exchanger. In actual applications, in order to ensure the insulation of the heat exchanger, the surface of the heat exchanger is electrophoresed or coated with insulating paint. In order to reserve a conductive area on the heat exchanger that can be electrically connected, it is necessary to mask the corresponding position in advance before electrophoresis or coating with insulating paint. The operation is cumbersome and prone to errors.

[0126] However, the embodiment of the present application is different from this. In the embodiment of the present application, an adapter bracket 42 is pre-connected to the heat exchanger 30, and then the area of ​​the heat exchanger 30 to which the adapter bracket 42 is not connected is electrophoresed or coated with insulating paint, which facilitates operation.

[0127] Furthermore, by providing an adapter bracket 42 on the heat exchanger 30, the fastener 41 is connected to the adapter bracket 42 and the connecting beam 12, so that the heat exchanger 30 and the connecting beam 12 are fixedly connected and electrically connected, which is convenient for positioning and helps to reduce the difficulty of assembly. In addition, it can also reduce the impact on the structural strength of the heat exchanger 30.

[0128] In some optional embodiments, the adapter bracket 42 is welded to the heat exchanger 30. Connecting the adapter bracket 42 and the heat exchanger 30 by welding is conducive to improving the connection strength between the two, and also to improving the reliability of the electrical connection between the two. Of course, the adapter bracket 42 and the heat exchanger 30 can also be fixedly connected by a fastening member.

[0129] For example, Figure 6 As shown, the adapter bracket 42 is connected to the heat exchange element 30 , and the fastener 41 is connected to the adapter bracket 42 and the second beam 122 .

[0130] It can be understood that the second beam 122 is used to support the battery cell 20. Therefore, the area of ​​the second beam 122 used to connect with the heat exchanger 30 in the height direction X is larger than the area of ​​the first beam 121 used to connect with the heat exchanger 30 in the height direction X. Therefore, the above-mentioned arrangement facilitates assembly and helps to improve the reliability of the connection.

[0131] like Figure 6 As shown, in some embodiments, the adapter bracket 42 has a first hole 402 , and the fastener 41 is passed through the first hole 402 .

[0132] The first hole 402 can limit and stabilize the fastener 41 to prevent the fastener 41 from shaking or shifting, and it is also convenient for the connection and assembly between the fastener 41 and the adapter bracket 42. In addition, the setting of the first hole 402 can also reduce the stress concentration of the adapter bracket 42 to improve the strength of the adapter bracket 42.

[0133] The battery device 1 provided in some embodiments of the present application is configured in the above manner, which is beneficial to improving the connection stability between the fastener 41 and the adapter bracket 42, thereby facilitating improving the reliability of the electrical connection between the connecting beam 12 and the heat exchange element 30.

[0134] The shape of the first hole 402 may include, but is not limited to, any one of a circle, a rectangle, and a triangle.

[0135] In some embodiments, the heat exchange element 30 has a groove 303 communicating with the gap 102 . In the height direction X, the orthographic projection of the fastener 41 located in the gap 102 falls into the groove 303 .

[0136] The fastener 41 is passed through the first hole 402 and connected to the adapter bracket 42, so that at least part of the fastener 41 is located in the gap 102. By providing a groove 303 on the heat exchanger 30, the groove 303 can play a avoiding role for the fastener 41, which is beneficial to prevent the fastener 41 from interfering with the heat exchanger 30, thereby ensuring the reliability of the heat exchanger 30.

[0137] Specifically, the heat exchange element 30 has a concave groove 303 on one side surface facing the second beam 122 along the height direction X.

[0138] Please continue reading Figure 6 In some embodiments, the adapter bracket 42 includes an adapter portion 421 and a protrusion 422 that are connected and arranged, the adapter portion 421 is connected to the heat exchange element 30, the protrusion 422 protrudes from the adapter portion 421 along the height direction X, and the fastener 41 is connected to the protrusion 422.

[0139] Specifically, the protrusion 422 protrudes from the adapter 421 along the height direction X toward the side where the second beam 122 is located. The protrusion 422 is used to connect with the fastener 41 , and the adapter 421 is used to connect with the heat exchange component 30 .

[0140] There is a gap 102 between the heat exchanger 30 and the second beam 122 of the connecting beam 12. By setting the adapter bracket 42 to the above structure, it is beneficial to ensure that it does not crack after being fastened to the fastener 41, so as to improve its own strength. In addition, the battery device 1 provided in some embodiments of the present application is arranged in the above manner, which is convenient for processing and helps to reduce stress concentration on the adapter bracket 42.

[0141] Illustratively, the protrusion 422 has a first hole 402 .

[0142] In some embodiments, both sides of the convex portion 422 along the second direction Y are connected to the transition portion 421 , or both sides of the convex portion 422 along the third direction Z are connected to the transition portion 421 .

[0143] In some embodiments, the transition portion 421 is disposed on a peripheral side of the convex portion 422 and surrounds the convex portion 422 .

[0144] In some embodiments, the protrusion 422 is disposed at a middle position of the transition portion 421 .

[0145] In some embodiments, the surface of the heat exchanger 30 has a first insulating portion 301 and a first positioning portion 302, the first insulating portion 301 is arranged around the first positioning portion 302, the first insulating portion 301 is provided with a first insulating layer, and the adapter bracket 42 is connected to the first positioning portion 302 and is electrically connected to the heat exchanger 30 through the first positioning portion 302.

[0146] The heat exchanger 30 may be made of a metal structure, and a first insulating layer may be provided on its surface to achieve insulation between the metal structure and the battery cell 20, so as to prevent the battery cell 20 from contacting the metal structure and causing a short circuit during the charging and discharging process. The first insulating layer may be made of, but is not limited to, insulating materials such as silicone, rubber, and polyethylene.

[0147] By configuring in the above manner, the adapter bracket 42 can be first connected to the first positioning portion 302, and then the first insulating layer can be provided on the first insulating portion 301. This can not only ensure the effectiveness of the electrical connection between the adapter bracket 42 and the heat exchanger 30, but also facilitate operation. There is no need to mask the surface of the heat exchanger 30 in advance to reserve a position for conductive connection, which helps to reduce the difficulty of work and improve the accuracy of electrical connection.

[0148] See also Figure 6 and Figure 7 In some embodiments, the conductive fastening assembly 40 includes an adapter plate 43 and a fastener 41 , the adapter plate 43 is connected to the side of the connecting beam 12 facing toward or away from the heat exchanger 30 , and the fastener 41 is connected to the adapter plate 43 and the heat exchanger 30 .

[0149] In the related art, in order to achieve electrical connection between the heat exchanger 30 and the housing 10, the component for achieving electrical connection needs to be connected to a conductive position on the housing 10. In actual applications, in order to ensure the insulation of the housing 10, the surface of the housing 10 is electrophoresed or coated with insulating paint. In order to reserve a conductive area on the housing 10 that can be electrically connected, the corresponding position needs to be masked in advance before electrophoresis or coating with insulating paint. The operation is cumbersome and prone to errors.

[0150] The embodiment of the present application is different from that. In the embodiment of the present application, an adapter plate 43 is pre-connected to the connecting beam 12 of the box body 10, and then the area of ​​the box body 10 to which the adapter bracket 42 is not connected is electrophoresed or coated with insulating paint to facilitate operation.

[0151] Furthermore, by providing an adapter bracket 42 on the connecting beam 12, the fastener 41 is connected to the heat exchanger 30 and the adapter bracket 42, so that the heat exchanger 30 and the connecting beam 12 are fixedly connected and electrically connected, which is convenient for positioning and helps to reduce the difficulty of assembly. In addition, it can also reduce the impact on the structural strength of the heat exchanger 30.

[0152] In some optional embodiments, the adapter plate 43 is welded to the connecting beam 12. Connecting the adapter plate 43 and the connecting beam 12 by welding is conducive to improving the connection strength between the two, and also to improving the reliability of the electrical connection between the two. Of course, the adapter plate 43 and the connecting beam 12 can also be fixedly connected by a fastening member.

[0153] The material of the adapter plate 43 may be the same as or different from that of the connecting beam 12. Optionally, the adapter plate 43 and the connecting beam 12 are made of the same material so that they have the same melting point and are easy to weld into one. Optionally, the adapter plate 43 and the connecting beam 12 are both made of stainless steel.

[0154] Exemplarily, the adapter plate 43 is connected to a side of the second beam 122 that is away from the heat exchange element 30 along the height direction X. This arrangement facilitates assembly of the adapter plate 43 .

[0155] Optionally, the conductive fastening assembly 40 may include only the fastener 41, or may include the fastener 41 and an adapter bracket 42, or may include the fastener 41 and an adapter plate 43, or may include the fastener 41, the adapter bracket 42, and the adapter plate 43 simultaneously.

[0156] For example, Figure 6 As shown, the adapter plate 43 is connected to the second beam 122 , and the fastener 41 is connected to the adapter plate 43 and the heat exchange element 30 .

[0157] In some embodiments, the connecting beam 12 has a second hole, and the fastener 41 is passed through the second hole.

[0158] The second hole can limit and stabilize the fastener 41 to prevent the fastener 41 from shaking or shifting, and it also facilitates the connection and assembly between the fastener 41 and the connecting beam 12. In addition, the setting of the second hole can also reduce the stress concentration of the connecting beam 12 to improve the strength of the connecting beam 12.

[0159] The battery device 1 provided in some embodiments of the present application is configured in the above manner to improve the connection stability between the fastener 41 and the adapter plate 43, thereby facilitating improving the reliability of the electrical connection between the box body 10 and the heat exchange element 30.

[0160] like Figure 6 As shown, in some embodiments, the adapter plate 43 has a third hole 403 , and the fastener 41 is inserted through the second hole and the third hole 403 .

[0161] The shape of the second hole may include but is not limited to any one of a circle, a rectangle, and a triangle; the shape of the third hole 403 may include but is not limited to any one of a circle, a rectangle, and a triangle.

[0162] Specifically, the second beam 122 is provided with a second hole, and the second hole and the third hole 403 are arranged opposite to each other along the height direction X.

[0163] In some embodiments, the adapter plate 43 includes a first connection portion 431 and a second connection portion 432 , the fastener 41 is connected to the first connection portion 431 , and the first connection portion 431 and the second connection portion 432 have different areas.

[0164] By configuring in the above manner, the area occupied by the adapter plate 43 on the connecting beam 12 can be reduced, that is, the connection area between the adapter plate 43 and the connecting beam 12 can be reduced, so that more positions of the box body 10 can be insulated to improve safety performance.

[0165] Optionally, the area of ​​the first connection portion 431 is greater than the area of ​​the second connection portion 432 , so as to improve the connection reliability between the fastener 41 and the adapter plate 43 .

[0166] Optionally, the second connection portion 432 is connected to the peripheral side of the first connection portion 431 and welded to the connection beam 12 .

[0167] For example, Figure 6 and Figure 7 As shown, the adapter plate 43 includes a first connection part 431 and a second connection part 432 alternately arranged along the second direction Y, and the first connection part 431 is respectively connected to a second connection part 432 on both sides along the second direction Y, each first connection part 431 is provided with a third hole 403, and the fastener 41 is passed through the third hole 403 and fixedly connected to the first connection part 431.

[0168] By configuring in the above manner, the stability and reliability of the connection between the fastener 41 and the connecting beam 12 can be improved.

[0169] In some embodiments, the surface of the connecting beam 12 has a second insulating portion 1201 and a second positioning portion 1202, the second insulating portion 1201 is arranged around the second positioning portion 1202, the second insulating portion 1201 is provided with a second insulating layer, and the adapter plate 43 is connected to the second positioning portion 1202 and is electrically connected to the connecting beam 12 through the second positioning portion 1202.

[0170] Specifically, the connecting beam 12 can be made of a metal structure, and a second insulating layer is provided on one side of its surface to achieve insulation between the metal structure and the battery cell 20, so as to prevent the battery cell 20 from contacting the metal structure and causing a short circuit during the charging and discharging process. The second insulating layer can be made of, but is not limited to, insulating materials such as silicone, rubber, and polyethylene.

[0171] By configuring in the above manner, the adapter plate 43 can be first connected to the second positioning portion 1202, and then the second insulating layer can be provided on the second insulating portion 1201. This can not only ensure the effectiveness of the electrical connection between the adapter plate 43 and the connecting beam 12, but also facilitate operation. There is no need to mask the surface of the connecting beam 12 in advance to reserve a position for conductive connection, which helps to reduce the difficulty of work and improve the accuracy of electrical connection.

[0172] See also Figure 6 In some embodiments, the conductive fastening assembly 40 includes at least one of a bolt 412, a rivet, a nut, and a screw.

[0173] Among them, the bolts 412 may include but are not limited to hexagonal head bolts, square head bolts, T-slot bolts, etc.; the rivets may include but are not limited to flat head rivets, semi-circular head rivets, flat cone head rivets, etc.; the nuts may include but are not limited to hexagonal head nuts, pull rivet nuts 411, square nuts, flange nuts, screw-in nuts, etc.; the screws may include but are not limited to self-tapping screws, set screws, hexagonal screws, etc.

[0174] The conductive fastening assembly 40 may include any one of the above-mentioned fastening components, and may also be provided with a combination of any two or more of the above-mentioned components.

[0175] The battery device 1 provided in some embodiments of the present application is configured in the above manner, which can make the electrical connection between the connecting beam 12 and the heat exchange element 30 more reliable and help improve the flexibility of use of the battery device 1.

[0176] Illustratively, the conductive fastening assembly 40 includes a fastener 41 , and the fastener 41 may include at least one of a bolt 412 , a rivet, a nut, and a screw.

[0177] like Figure 6 As shown, as an example, the fastener 41 includes a detachably connected rivet nut 411 and a bolt 412. Specifically, the rivet nut 411 and the adapter bracket 42 on the heat exchanger 30 can be first locked and connected, and then the adapter bracket 42 and the adapter plate 43 on the second beam 122 are positioned to relative positions, and the adapter plate 43 and the rivet nut 411 are locked and connected using the bolt 412.

[0178] The battery device 1 provided in some embodiments of the present application can weld an adapter bracket 42 on the heat exchanger 30, set a rivet nut 411 on the adapter bracket 42, and weld an adapter plate 43 on the second beam 122 of the box 10 for supporting the battery cell 20, and use bolts 412 to lock the adapter plate 43 and the rivet nut 411 to fix the heat exchanger 30 and the box 10 to connect them, so as to achieve the same potential between them. When the heat exchanger 30 is coated with a first insulating layer and the box 10 is electrophoresed to set a second insulating layer, no additional shielding is required, so that the connecting beam 12 can use non-galvanized steel, which can meet the salt spray corrosion requirements and reduce material costs. At the same time, using non-galvanized steel instead of galvanized steel can reduce welding defects and improve welding yield.

[0179] In some embodiments, the number of the conductive fastening components 40 is set to at least two, and the at least two conductive fastening components 40 are distributed at intervals.

[0180] By configuring in this manner, the reliability of the electrical connection between the second beam 122 and the heat exchanger 30 can be further ensured, thereby further ensuring the reliability of the electrical connection between the housing 10 and the heat exchanger 30 .

[0181] Optionally, at least two conductive fastening components 40 may be distributed along the second direction Y at intervals.

[0182] According to some embodiments of the present application, the present application provides an electrical device, including the battery device 1 provided in any of the above embodiments, and the battery device 1 is used to store or provide electrical energy.

[0183] Please also read Figures 4 to 7 The embodiment of the present application provides a battery device 1, including a box body 10, a battery cell 20, a heat exchange component 30, and a conductive fastening assembly 40.

[0184] The box body 10 includes a wall portion 11 and a connecting beam 12. The wall portion 11 encloses a receiving cavity 101. The connecting beam 12 is connected to the side of the wall portion 11 facing the receiving cavity 101. The connecting beam 12 includes a first beam 121 and a second beam 122 arranged to intersect. The first beam 121 divides the receiving cavity 101 into at least two sub-cavities 1011. The battery cell 20 is arranged in the sub-cavity 1011 and supported by the second beam 122. The surface of the second beam 122 has a second insulating portion and a second positioning portion 1202. The second insulating portion is arranged around the second positioning portion 1202. The second insulating portion is provided with a second insulating layer. The second beam 122 also has a second hole.

[0185] The heat exchange element 30 is arranged in the accommodating cavity 101 and is configured to exchange heat with the battery cell 20. The heat exchange element 30 and the second beam 122 have a gap 102 at least partially in the height direction X of the box body 10. The surface of the heat exchange element 30 has a first insulating portion and a first positioning portion 302. The first insulating portion is arranged around the first positioning portion 302. The first insulating portion is provided with a first insulating layer. The heat exchange element 30 also has a groove 303 connected to the gap 102.

[0186] The conductive fastening assembly 40 includes an adapter bracket 42, a fastener 41, and an adapter plate 43. The adapter bracket 42 is located in the gap 102 and includes an adapter portion 421 and a convex portion 422 that are connected and arranged. The adapter portion 421 is connected to the first positioning portion 302 so that the adapter bracket 42 is electrically connected to the heat exchanger 30 through the first positioning portion 302. The convex portion 422 has a first hole 402 and protrudes from the adapter portion 421 along the height direction X. The adapter plate 43 includes a first connecting portion 431 and a second connecting portion 432. The first connecting portion 431 has a third hole 403 and its area is larger than that of the second connecting portion 432. The adapter plate 43 is connected to the second positioning portion 1202 and is electrically connected to the second beam 122 through the second positioning portion 1202.

[0187] The orthographic projection of the fastener 41 located in the gap 102 falls into the groove 303. The fastener 41 is inserted into the first hole 402, the second hole and the third hole 403, and is fixedly connected to the protrusion 422 of the adapter bracket 42 and the first connecting portion 431 of the adapter plate 43, so that the second beam 122 and the heat exchanger 30 are fixedly connected through the conductive fastening assembly 40, so that the second beam 122 and the heat exchanger 30 are electrically connected through the conductive fastening assembly 40, and then the box body 10 and the heat exchanger 30 are electrically connected through the conductive fastening assembly 40.

[0188] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0189] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery device, characterized in that: include: The box body comprises a wall portion and a connecting beam, wherein the wall portion encloses a receiving cavity, and the connecting beam is connected to a side of the wall portion facing the receiving cavity; A battery cell, disposed in the accommodation cavity; a heat exchange member, disposed in the accommodating cavity and configured to exchange heat with the battery cell; A conductive fastening assembly, through which the connecting beam and the heat exchange element are fixedly connected, and the conductive fastening assembly is configured to electrically connect the box body and the heat exchange element; The heat exchange member and the connecting beam at least partially have a gap in the height direction of the box body, and part of the conductive fastening assembly is arranged in the gap.

2. The battery device according to claim 1, characterized in that: The connecting beam includes a first beam and a second beam arranged to intersect each other, the first beam divides the accommodating cavity into at least two sub-cavities, the battery cell is arranged in the sub-cavity and supported by the second beam, and at least one of the first beam and the second beam is connected to the heat exchange component through the conductive fastening assembly.

3. The battery device according to claim 1, characterized in that: The conductive fastening assembly includes an adapter bracket and a fastener. The adapter bracket is located in the gap and connected to the heat exchange component. The fastener is connected to the adapter bracket and the connecting beam.

4. The battery device according to claim 3, characterized in that: The adapter bracket has a first hole, and the fastener is passed through the first hole.

5. The battery device according to claim 4, characterized in that: The heat exchange member has a groove communicating with the gap, and in the height direction, the orthographic projection of the fastener located in the gap falls into the groove.

6. The battery device according to claim 3, characterized in that: The adapter bracket includes an adapter portion and a convex portion which are connected to each other. The adapter portion is connected to the heat exchange element. The convex portion protrudes from the adapter portion along the height direction. The fastener is connected to the convex portion.

7. The battery device according to claim 6, characterized in that: The surface of the heat exchanger has a first insulating portion and a first positioning portion, the first insulating portion is arranged around the first positioning portion, the first insulating portion is provided with a first insulating layer, and the adapter bracket is connected to the first positioning portion and is electrically connected to the heat exchanger through the first positioning portion.

8. The battery device according to claim 1, characterized in that: The conductive fastening assembly includes an adapter plate and a fastener. The adapter plate is connected to a side of the connecting beam facing toward or away from the heat exchanger. The fastener is connected to the adapter plate and the heat exchanger.

9. The battery device according to claim 8, characterized in that: The connecting beam has a second hole, and the fastener is passed through the second hole.

10. The battery device according to claim 9, characterized in that: The adapter plate includes a first connecting portion and a second connecting portion, the fastener is connected to the first connecting portion, and the first connecting portion and the second connecting portion have different areas.

11. The battery device according to claim 8, characterized in that: The surface of the connecting beam has a second insulating portion and a second positioning portion, the second insulating portion is arranged around the second positioning portion, the second insulating portion is provided with a second insulating layer, and the adapter is connected to the second positioning portion and is electrically connected to the connecting beam through the second positioning portion.

12. The battery device according to any one of claims 1 to 11, characterized in that: The conductive fastening assembly includes at least one of a bolt, a rivet, a nut, and a screw.

13. The battery device according to any one of claims 1 to 11, characterized in that: The number of the conductive fastening components is set to at least two, and at least two of the conductive fastening components are distributed at intervals.

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

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