Battery device and electric device

Abstract

The utility model relates to the technical field of batteries and discloses a battery device and a power utilization device.The battery device comprises a battery pack, a plurality of heat exchange parts and a heat conduction reinforcing part, the battery pack comprises a plurality of battery monomers which are sequentially arranged in the first direction, and the heat exchange parts are arranged on different sides of the battery pack correspondingly; each heat exchange part extends in the first direction and is in heat conduction fit with a plurality of single batteries of the battery pack, a cavity for accommodating a heat exchange medium is formed in each heat exchange part and is used for adjusting the temperature of the single batteries, and the heat conduction reinforcing part is fixed and in heat conduction fit with the single batteries of the battery pack; a heat-conducting reinforcing part is arranged between at least one heat exchange part and the battery pack, so that at least one of the plurality of heat exchange parts is fixed with the battery pack through the heat-conducting reinforcing part and is in heat-conducting fit with the battery pack. Therefore, the plurality of heat exchange pieces can better dissipate heat of the battery pack, and meanwhile, the heat conduction reinforcing piece can enhance the structural strength of the battery device, so that the reliability of the battery device is improved, and the failure risk of the heat exchange pieces is reduced.

Description

Technical Field

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

[0002] With the development of society and advancements in technology, battery devices are becoming increasingly widely used. During use, the battery cells within these devices generate heat, which typically requires a heat exchanger to dissipate heat. However, the heat dissipation efficiency and overall structural strength of battery devices with heat exchangers remain to be improved. Utility Model Content

[0003] The present application proposes a battery device and an electrical device, wherein the battery device is provided with multiple heat exchange components, each of which has a large heat exchange area to better dissipate heat from the battery pack. At the same time, a thermal conductive reinforcement component is provided between at least one heat exchange component and the battery pack. The thermal conductive reinforcement component can enhance the structural strength of the battery device and facilitate improving the reliability of the battery device.

[0004] In a first aspect, an embodiment of the present application provides a battery device comprising: a battery pack, a plurality of heat exchange elements and a thermally conductive reinforcement element, the battery pack comprising a plurality of battery cells arranged in sequence along a first direction, the plurality of heat exchange elements being respectively arranged on different sides of the battery pack, each heat exchange element extending along the first direction and thermally cooperating with the plurality of battery cells of the battery pack, each heat exchange element having a cavity therein for accommodating a heat exchange medium for regulating the temperature of the battery cell, the thermally conductive reinforcement element being fixed and thermally cooperating with the plurality of battery cells of the battery pack, a thermally conductive reinforcement element being provided between at least one heat exchange element and the battery pack so that at least one of the plurality of heat exchange elements is fixed and thermally cooperating with the battery pack through the thermally conductive reinforcement element.

[0005] In the above technical solution, the battery device includes multiple heat exchange elements, and the multiple heat exchange elements are arranged on different sides of the battery pack so that different sides of the battery pack can exchange heat with the heat exchange elements, so as to increase the heat exchange area of ​​the battery pack. At the same time, the battery pack includes multiple battery cells arranged in sequence along a first direction, and each heat exchange element also extends along the first direction so that the heat exchange element can thermally cooperate with each of the multiple battery cells to further increase the heat exchange area of ​​the battery pack, which is conducive to better regulating the temperature of the battery cells and improving the reliability of the battery device. In addition, a thermal conductive reinforcement element is provided between at least one heat exchange element and the battery pack. The thermal conductive reinforcement element is fixed and thermally cooperated with the multiple battery cells of the battery pack, so that the thermal conductive reinforcement element is not easy to affect the heat exchange between the heat exchange element and the battery cells. At the same time, the thermal conductive reinforcement element can also enhance the structural strength of the battery device, which can further improve the reliability of the battery device.

[0006] In some embodiments, the multiple heat exchange elements include a first heat exchange element and a second heat exchange element, and the first heat exchange element and the second heat exchange element are respectively arranged on opposite sides of the battery pack in the second direction, and the second direction is perpendicular to the first direction; and / or, the multiple heat exchange elements include a first heat exchange element and a third heat exchange element, the first heat exchange element is arranged on one side of the battery pack in the second direction, and the third heat exchange element is arranged on one side of the battery pack in the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0007] In the above technical solution, the first heat exchange element and the second heat exchange element can respectively contact different sides of the battery pack, so as to increase the heat exchange area of ​​the battery pack; and / or, the first heat exchange element and the third heat exchange element can cooperate with different sides of the battery pack to conduct heat, so as to increase the heat exchange area of ​​the battery pack.

[0008] In some embodiments, the plurality of heat exchange members include a first heat exchange member and a second heat exchange member, and the plurality of thermally conductive reinforcement members include a first thermally conductive reinforcement member and a second thermally conductive reinforcement member. The first thermally conductive reinforcement member is disposed between the first heat exchange member and the battery pack, and the second thermally conductive reinforcement member is disposed between the second heat exchange member and the battery pack. In the above technical solution, the first thermally conductive reinforcement member and the second thermally conductive reinforcement member are disposed on opposite sides of the battery pack in the second direction, respectively, to further improve the structural stability of the battery device. Furthermore, when the battery pack needs to be mounted on other components, the first thermally conductive reinforcement member and the second thermally conductive reinforcement member can be used to more conveniently mount the battery pack on the other components.

[0009] In some embodiments, each of the first and second thermally conductive reinforcement members has a mounting portion that is fixedly engaged with a load beam of the battery device. In the above technical solution, the mounting portion on the first and second thermally conductive reinforcement members are also located on opposite sides of the battery pack in the second direction, so that after the mounting portion is fixedly engaged with the load beam of the battery device, the battery pack can be more stably positioned.

[0010] In some embodiments, each battery cell has a first wall, which is the wall with the largest area in the battery cell, and the first wall is perpendicular to the first direction, or the first wall is perpendicular to the second direction. The poles of multiple battery cells in the battery pack are all located at one end of the battery cell in the third direction. The distance between each of the first heat exchange member and the second heat exchange member and the other end of the battery cell in the third direction is less than the distance between it and the above-mentioned end of the battery cell in the third direction. In the third direction, the height of each of the first heat exchange member and the second heat exchange member is less than or equal to 60% of the height of the battery cell and greater than or equal to 30% of the height of the battery cell. The first direction and the second direction are respectively perpendicular to the third direction; and / or the first heat exchange member and the second heat exchange member are both arranged adjacent to one end of the battery cell in the third direction, and the distance between one end of the battery cell in the third direction and the mounting portion in the third direction is less than or equal to 80% of the height of the battery cell and greater than or equal to 50% of the height of the battery cell.

[0011] In the above technical solution, the height of each of the first heat exchange member and the second heat exchange member is set within 30% to 60% of the height of the battery cell, so that the first heat exchange member and the second heat exchange member have sufficient coverage, and the first heat exchange member and the second heat exchange member will not excessively restrict the height of the mounting portion; and / or, the first heat exchange member and the second heat exchange member are both arranged adjacent to one end of the battery cell in the third direction, and the distance between the above-mentioned one end of the battery cell and the mounting portion in the third direction is set within the range of 50% to 80% of the height of the battery cell, so as to reduce the restriction on the height of the load beam, and the battery pack has good stability after being installed on the load beam through the mounting portion.

[0012] In some embodiments, at least one of the first thermal conductive reinforcement member and the second thermal conductive reinforcement member includes a side plate and a pull plate, the side plate is arranged between the corresponding heat exchange member and the battery pack, the pull plate is bent and connected to the side plate and extends from the side plate in the second direction toward the direction away from the battery pack, the corresponding heat exchange member is located on the side of the pull plate in the third direction, the mounting portion is formed on the pull plate, and the first direction and the second direction are respectively perpendicular to the third direction.

[0013] In the above technical solution, the pull plate and the corresponding heat exchange component are arranged to avoid each other, and the corresponding heat exchange component is located on one side of the pull plate, so that when the mounting portion is assembled with the load-bearing beam, the corresponding heat exchange component is not likely to affect the assembly of the battery pack, thereby improving the reliability of the battery device.

[0014] In some embodiments, the side panel includes a first plate portion and a second plate portion that are integrally connected, the first plate portion and the second plate portion are respectively located on both sides of the pull plate in the third direction, the pull plate is connected at the connection position of the first plate portion and the second plate portion, and the first direction and the second direction are respectively perpendicular to the third direction.

[0015] In the above technical solution, the structures of the side plates and the pull plates are relatively simple and easy to manufacture. At the same time, the pull plates have good connection strength so that the pull plates can better bear the gravity or external impact of the battery device.

[0016] In some embodiments, the battery cell includes a shell, and the two ends of the shell in the third direction are respectively a first end and a second end. In the third direction, the distance between the heat exchange element corresponding to the side plate and the first end is smaller than the distance between it and the second end, and the side plate extends to be flush with the second end or beyond the second end.

[0017] In the above technical solution, the side panel extends to be flush with the second end or beyond the second end, so that the side panel has a larger coverage area, thereby improving the protection and support capabilities of the side panel.

[0018] In some embodiments, each of the first thermally conductive reinforcement member and the second thermally conductive reinforcement member has a supporting portion, the supporting portion abuts against one end of the battery pack in the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0019] In the above technical solution, the supporting portion can be used to support multiple battery cells, so that when the battery pack is hoisted from a third direction, the weight of the multiple battery cells can be effectively supported by the supporting portion, and the multiple battery cells are not likely to sag or fall off.

[0020] In some embodiments, the multiple heat exchange elements further include a third heat exchange element, which is disposed on the same side of the battery pack as the supporting portion, and is disposed between the two supporting portions and spaced apart from the first heat exchange element and the second heat exchange element.

[0021] In the above technical solution, the third heat exchange element is spaced apart from the first heat exchange element and the second heat exchange element. When the above three heat exchange elements need to be replaced or maintained, they can be maintained or replaced separately; the third heat exchange element and the two supporting parts are spaced apart so that the third heat exchange element is not likely to affect the bearing of the battery pack by the two supporting parts.

[0022] In some embodiments, in the second direction, the width of the third heat exchange element is less than or equal to 85% of the width of the battery cell and greater than or equal to 60% of the width of the battery cell. In the above technical solution, by setting the width of the third heat exchange element within the range of 60% to 85% of the width of the battery cell, the two supporting portions have sufficient structural strength, and the third heat exchange element can have a relatively large heat exchange area, thereby improving the reliability of the battery device.

[0023] In some embodiments, the battery assembly further includes two end plates, one disposed on each side of the battery pack in the first direction, and each end plate being secured to the first thermally conductive reinforcement member and the second thermally conductive reinforcement member. In the above technical solution, each end plate is secured to the first thermally conductive reinforcement member and the second thermally conductive reinforcement member, thereby providing the battery assembly with greater structural strength and improving the reliability of the battery assembly.

[0024] In some embodiments, on a preset plane, the orthographic projection area of ​​the cavity of each of the first heat exchange member and the second heat exchange member is less than or equal to 80% of the orthographic projection area of ​​the first thermal conductive reinforcement member or the second thermal conductive reinforcement member, and greater than or equal to 50% of the orthographic projection area of ​​the first thermal conductive reinforcement member or the second thermal conductive reinforcement member, and the preset plane is perpendicular to the second direction.

[0025] In the above technical solution, the ratio of the orthographic projection area of ​​the cavity to the orthographic projection area of ​​the first heat-conducting reinforcement or the second heat-conducting reinforcement is set in the range of 50% to 80%, so that the cavity has sufficient area for the flow of heat exchange medium. At the same time, the dimensions of the first heat exchange member and the second heat exchange member in the third direction do not need to be too large, thereby reducing the possibility of interference between the first heat exchange member and the second heat exchange member and the mounting portion.

[0026] In some embodiments, the battery device further includes a first load-bearing beam and a second load-bearing beam, wherein the first load-bearing beam and the second load-bearing beam are respectively arranged on opposite sides of the battery pack in the second direction, the first load-bearing beam is fixed to the mounting portion of the first thermal conductive reinforcement member, and the second load-bearing beam is fixed to the mounting portion of the second thermal conductive reinforcement member.

[0027] In the above technical solution, the mounting portion on the first thermally conductive reinforcement member and the mounting portion on the second thermally conductive reinforcement member are also located on both sides of the battery pack in the second direction. By fixing the opposite sides of the battery pack to the first load-bearing beam and the second load-bearing beam respectively, the setting position of the battery pack is made more stable, thereby facilitating improving the reliability of the battery device.

[0028] In some embodiments, at least one of the first load-bearing beam and the second load-bearing beam is fixed to the mounting portion by threaded fasteners; and / or, at least one of the first load-bearing beam and the second load-bearing beam includes a first beam body and a second beam body fixedly connected to each other, and the first beam body and the second beam body are clamped on opposite sides of the mounting portion in a third direction, and the first direction and the second direction are respectively perpendicular to the third direction.

[0029] In the above technical solution, at least one of the first load-bearing beam and the second load-bearing beam is fixed to the mounting portion by threaded fasteners to facilitate assembly and disassembly of the battery device; and / or, the first beam body and the second beam body are clamped on opposite sides of the corresponding mounting portion in the third direction to make the setting position of the battery device more stable.

[0030] In some embodiments, the multiple heat exchange elements include a first heat exchange element, a second heat exchange element, and a third heat exchange element. At least one of the first and second heat exchange elements is integrally connected to the third heat exchange element. A thermally conductive reinforcement element corresponding to at least one of the first and second heat exchange elements is spaced apart from an end of the battery cell corresponding to the third heat exchange element in the third direction. In the above technical solution, when multiple adjacent heat exchange elements located on different sides of the battery pack are bent and connected, complex bending is not required to avoid the corresponding thermally conductive reinforcement element, thereby reducing the bending requirements of the heat exchange elements.

[0031] In some embodiments, the multiple heat exchange elements include a first heat exchange element, a second heat exchange element, and a third heat exchange element. The terminals of the multiple battery cells in the battery pack are located on a side of the battery cells facing away from the third heat exchange element. In the above technical solution, the terminals of the multiple battery cells and the third heat exchange element are located on opposite sides of the battery cells. This eliminates the need for the third heat exchange element to avoid the terminals and require a different design, thus simplifying the structure of the third heat exchange element.

[0032] In some embodiments, at least two adjacent heat exchangers are integrally connected; and / or, two adjacent heat exchangers are spaced apart. In the above technical solution, at least two adjacent heat exchangers are integrally connected, thereby improving the manufacturing efficiency of the multiple heat exchangers and facilitating their assembly into the battery pack; and / or, two adjacent heat exchangers are separately provided, thereby simplifying the structure of the heat exchangers and improving the manufacturing efficiency of the heat exchangers.

[0033] In some embodiments, at least one heat exchange element includes a flat plate and a flow channel plate stacked along its thickness direction, the flow channel plate having a flat portion and a protruding portion, the flat portion being fixed to the flat plate, the protruding portion being arranged to protrude away from the flat plate relative to the flat portion and spaced apart from the flat plate, so that a cavity is defined between the flow channel plate and the flat plate, the flat plate being arranged between the battery pack and the flow channel plate, the flat plates of two adjacent heat exchange elements being integrally connected, and the flow channel plates of two adjacent heat exchange elements being integrally connected. In the above technical solution, the medium in the cavity can exchange heat with the battery pack through the flat plate, and the heat exchange surface is relatively flat, so that the heat exchange uniformity of the heat exchange element is better. At the same time, the structure of the above heat exchange element is relatively simple, which is convenient for improving the processing and manufacturing efficiency of the heat exchange element. Moreover, the flat plates of two adjacent heat exchange elements can be integrally formed, and the flow channel plates of two adjacent heat exchange elements can be integrally formed, which is convenient for improving the processing efficiency of the heat exchange element.

[0034] In some embodiments, a transition portion is formed at the connection point between two adjacent heat exchange elements, and a communication channel is formed within the transition portion. The communication channel connects the cavities of the two adjacent heat exchange elements. In the above technical solution, the communication channel allows the heat exchange medium in the cavities of the two adjacent heat exchange elements to flow and exchange with each other, allowing the higher and lower temperature heat exchange media to fully mix, thereby achieving more uniform heat exchange between the heat exchange elements and the battery cells.

[0035] In some embodiments, the cavities within multiple heat exchange elements are separated or connected, and the cavity of at least one heat exchange element has a first interface and a second interface, one of the first interface and the second interface is a medium inlet, and the other is a medium outlet, and the battery device is configured to meet at least one of the following conditions: Condition A1, the heat exchange element with the first interface extends beyond the battery pack in the first direction, and the first interface and the second interface are provided on the portion of the heat exchange element that extends beyond the battery pack; Condition A2, the cavity includes multiple flow channels connected in parallel between the first interface and the second interface, each flow channel extends along the first direction, and each battery cell is respectively opposite to a portion of each flow channel; Condition A3, each cavity has a medium inlet and a medium outlet, respectively, the medium inlets of the multiple cavities are all located on one side of the battery pack in the first direction, and the medium outlets of the multiple cavities are located on the other side of the battery pack in the first direction.

[0036] In the above technical solution, in condition A1, part of the area of ​​the heat exchanger where the first interface and the second interface are located will not contact the battery pack, so that when the first interface and the second interface are connected to the external pipeline, it is not easy to interfere with the battery pack; in condition A2, each flow channel can exchange heat with each battery cell of the battery pack at a different position, so that different areas of multiple battery cells can have a relatively good heat exchange effect, which is convenient for improving the reliability of the battery device; in condition A3, the medium inlet and the medium outlet are respectively located on the opposite sides of the battery pack in the first direction, so that the flow path of the heat exchange medium is clearer, thereby improving the heat exchange efficiency of the heat exchanger.

[0037] In some embodiments, the battery device satisfies at least conditions A1 and A3, and the first interface of each heat exchange element is located on its side facing the battery pack; and / or the second interface of each heat exchange element is located on its side facing the battery pack.

[0038] In the above technical solution, the first interface is located between the heat exchanger and the battery pack so as to shorten the spatial spacing between multiple first interfaces, so that the structure of the battery device can be more compact; and / or, the second interface is located between the heat exchanger and the battery pack so as to shorten the spatial spacing between multiple second interfaces, so that the structure of the battery device can be more compact.

[0039] In a second aspect, an embodiment of the present application provides an electrical device, comprising the battery device of the embodiment of the first aspect.

[0040] In the above technical solution, since the battery device has good reliability, the use of the battery device can improve the reliability of the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0042] Figure 1 A schematic diagram of the structure of a vehicle is provided as the electrical device provided in some embodiments of the present application;

[0043] Figure 2 An exploded view of the structure of a battery device provided in some embodiments of the present application;

[0044] Figure 3 Schematic diagram of a battery device provided in some embodiments of the present application;

[0045] Figure 4 for Figure 3 An exploded view of the battery assembly shown;

[0046] Figure 5 for Figure 3 Another schematic diagram of the battery arrangement shown;

[0047] Figure 6 for Figure 3 Schematic diagram of the heat exchange element shown;

[0048] Figure 7 Schematic diagram of a battery device provided in some embodiments of the present application.

[0049] Figure numerals: battery device 200, electrical device 300, battery pack 1, battery cell 10, first wall 11, shell 12, first end 12a, second end 12b, pole 13, heat exchange element 2, cavity 20, flow channel 20a, first heat exchange element 21, second heat exchange element 22, third heat exchange element 23, flat plate 24, flow channel plate 25, flat portion 25a, protrusion 25b, first interface 26, second interface 27, transition portion 28, connecting channel 29, thermal reinforcement 3, side plate 31, first plate portion 31a, second plate portion 31b, pull plate 32, supporting portion 33, first thermal reinforcement 34, second thermal reinforcement 35, end plate 4, controller 60, motor 62, box 64, first box 64a, second box 64b, accommodating chamber 66. DETAILED DESCRIPTION

[0050] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0051] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0052] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0053] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0054] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood broadly. For example, they can refer to direct connection or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0055] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0056] 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 dimensions of the various components in the embodiments of the present application shown in the drawings are for illustrative purposes only and should not constitute any limitation on the present application.

[0057] The term "plurality" used in this application refers to two or more (including two).

[0058] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0059] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. For example, a battery cell assembly can be a battery module, which is a single module formed by arranging and securing multiple battery cells. For example, a battery module can be formed by bundling multiple battery cells using cable ties.

[0060] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0061] 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. Of course, the battery device may also not include a box.

[0062] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0063] As an example, the housing may include a first housing and a second housing. The first housing and the second housing engage to form an enclosed space within the housing to house the battery cell assembly. Enclosed here means covered or closed, and can be either sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0064] As an example, the box may include a top cover, a frame, and a bottom plate, wherein the top cover and the bottom plate are respectively connected to the frame to form a closed space inside the box to accommodate the battery cell assembly.

[0065] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0066] In the embodiments of this application, battery cells may include secondary batteries, primary batteries, etc. Secondary batteries refer to battery cells that can be recharged to activate active materials after discharge and continue to be used; battery cells may be lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, and the embodiments of this application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0067] For example, a battery cell may generally include a housing, a bottom support plate, an electrode assembly, and an electrolyte. The housing is used to accommodate the electrode assembly and the electrolyte, and is provided with at least one positive electrode post and at least one negative electrode post. The bottom support plate is placed within the housing and is located at one end of the electrode assembly to support the electrode assembly. The electrode assembly includes one or more electrode assemblies, which are formed by stacking or winding positive and negative electrode sheets and separators.

[0068] The positive electrode sheet generally includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is directly or indirectly coated on the positive electrode current collector. The positive electrode current collector not coated with the positive electrode active material layer protrudes from the positive electrode current collector coated with the positive electrode active material layer. The positive electrode current collector not coated with the positive electrode active material layer serves as a positive electrode tab. Multiple positive electrode tabs are stacked together and electrically connected to the positive electrode post. For example, the stacked multiple positive electrode tabs can be directly welded to the positive electrode post to form an electrical connection. Alternatively, the electrode assembly may further include a positive electrode adapter. The stacked multiple positive electrode tabs are welded to one end of the positive electrode adapter, and the other end of the positive electrode adapter is welded to the positive electrode post to form an electrical connection between the positive electrode tab and the positive electrode post.

[0069] The negative electrode sheet can generally include a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is directly or indirectly coated on the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab. Multiple negative electrode tabs are stacked together and electrically connected to the negative electrode column. For example, the multiple stacked negative electrode tabs can be directly welded to the negative electrode column to form an electrical connection; alternatively, the electrode assembly can further include a negative electrode adapter. The multiple stacked negative electrode tabs are welded to one end of the negative electrode adapter, and the other end of the negative electrode adapter is welded to the negative electrode column to form an electrical connection between the negative electrode tab and the negative electrode column. The material of the separator is not limited, and can be, for example, polypropylene or polyethylene.

[0070] With the development of society and advancements in technology, the application of battery devices is becoming increasingly widespread. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application of battery devices continues to expand, market demand is also growing.

[0071] During use, the battery cells within a battery device generate heat, typically requiring a heat exchange element to dissipate the heat. However, in some technologies, the heat exchange element is located only on one side of the battery pack, resulting in a smaller heat exchange area and hindering rapid heat transfer in the battery device. In other technologies, the heat exchange element serves to connect the battery pack or to support its installation, while also dissipating heat from the battery pack. However, if the heat exchange element fails or ruptures, the heat exchange medium within the element can leak, potentially leading to failures such as short circuits in the battery device.

[0072] Based on the above considerations, in order to improve the reliability of the battery device, an embodiment of the present application proposes a battery device including: a battery pack, multiple heat exchangers and a thermally conductive reinforcement member, the battery pack including multiple battery cells arranged in sequence along a first direction, and multiple heat exchangers are respectively arranged on different sides of the battery pack, each heat exchanger extends along the first direction and each heat exchanger is thermally coordinated with multiple battery cells in the battery pack, each heat exchanger has a cavity for accommodating a heat exchange medium for regulating the temperature of the battery cell, the thermally conductive reinforcement member is fixed to the multiple battery cells of the battery pack and the thermally conductive reinforcement member is thermally coordinated with the multiple battery cells of the battery pack, a thermally conductive reinforcement member is provided between at least one heat exchanger and the battery pack, so that at least one of the multiple heat exchangers is fixed to the battery pack through the thermally conductive reinforcement member and at least one of the multiple heat exchangers is thermally coordinated with the battery pack through the thermally conductive reinforcement member.

[0073] In the above technical solution, the battery device includes multiple heat exchange elements, and the multiple heat exchange elements are arranged on different sides of the battery pack so that different sides of the battery pack can exchange heat with the heat exchange elements, so as to increase the heat exchange area of ​​the battery pack. At the same time, the battery pack includes multiple battery cells arranged in sequence along a first direction, and each heat exchange element also extends along the first direction so that the heat exchange element can thermally cooperate with each of the multiple battery cells, which is conducive to better regulating the temperature of the battery cells and improving the reliability of the battery device. In addition, a thermal conductive reinforcement element is provided between at least one heat exchange element and the battery pack. The thermal conductive reinforcement element is fixed and thermally cooperates with the multiple battery cells of the battery pack, so that the thermal conductive reinforcement element is not easy to affect the heat exchange between the heat exchange element and the battery cells. At the same time, the thermal conductive reinforcement element can also enhance the structural strength of the battery device, so that the thermal conductive reinforcement element can play a role of stabilizing support for the battery pack, which can further improve the reliability of the battery device and is conducive to reducing the load borne by at least one heat exchange element and reducing the risk of heat exchange medium leakage due to damage to the heat exchange element.

[0074] The present application provides an electric device using the present disclosure, the electric device including the battery device described above, the electric device using the battery device as a power source, and the electric device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., the spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc., and the electric tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0075] For the convenience of description, the following embodiments take the electric device 300 as a vehicle as an example to introduce the structures of the electric device 300 and the battery device 200 of the present application in detail.

[0076] Please refer to Figure 1 , Figure 1The power-consuming device 300 provided for some embodiments of the present application is a structural diagram of a vehicle. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The vehicle is provided with a battery device 200, and the battery device 200 can be arranged at the bottom, head or tail of the vehicle. The battery device 200 can be used to power the vehicle, for example, the battery device 200 can be used as an operating power source for the vehicle. The vehicle may also include a controller 60 and a motor 62, and the controller 60 is used to control the battery device 200 to power the motor 62, for example, for the starting, navigation and working power requirements of the vehicle during driving. In some embodiments of the present application, the battery device 200 can not only serve as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0077] Please refer to Figure 2 , Figure 2 The battery cell 10 provided in some embodiments of the present application is used for a structural explosion diagram of a battery device 200. The battery device 200 includes a case 64 and a plurality of battery cells 10, and the battery cells 10 are accommodated in the case 64. The case 64 is used to provide an assembly space for the battery cells 10, and the case 64 can adopt a variety of structures. In some embodiments, the case 64 may include a first case 64a and a second case 64b, and the first case 64a and the second case 64b cover each other, and the first case 64a and the second case 64b jointly define a receiving cavity 66 for accommodating the battery cells 10. The second case 64b can be a hollow structure with one end open, and the first case 64a can be a plate-like structure, and the first case 64a covers the open side of the second case 64b, so that the first case 64a and the second case 64b jointly define the receiving cavity 66; or the first case 64a and the second case 64b can also be hollow structures with one side open (for example Figure 2 As shown in FIG, the open side of the first box body 64a is covered with the open side of the second box body 64b. Of course, the box body 64 formed by the first box body 64a and the second box body 64b can be a variety of shapes, such as a cylinder or a cuboid.

[0078] In the battery device 200, multiple battery cells 10 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 10. Multiple battery cells 10 can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery unit 10 can be housed within the housing 64. Alternatively, the battery device 200 can be constructed by first connecting multiple battery cells 10 in series, in parallel, or in a hybrid connection to form a battery module. The multiple battery modules are then connected in series, in parallel, or in a hybrid connection to form an entire battery unit, which is then housed within the housing 64. The battery device 200 can also include other structures. For example, the battery device 200 can also include a busbar for electrically connecting the multiple battery cells 10.

[0079] Please refer to Figure 3-Figure 7 In an embodiment of the present application, a battery device 200 includes: a battery pack 1, multiple heat exchange elements 2 and a thermal conductive reinforcement element 3. The battery pack 1 includes multiple battery cells 10 arranged in sequence along a first direction. The multiple heat exchange elements 2 are respectively arranged on different sides of the battery pack 1. Each heat exchange element 2 extends along the first direction and each heat exchange element 2 is thermally coordinated with the multiple battery cells 10 of the battery pack 1. Each heat exchange element 2 has a cavity 20 for accommodating a heat exchange medium to regulate the temperature of the battery cell 10.

[0080] It can be seen that multiple heat exchange components 2 are respectively arranged on different sides of the battery pack 1. For example, taking the first direction as the front-to-back direction, heat exchange components 2 are respectively provided on at least two sides of the upper side, lower side, left side and right side of the battery pack 1, so that different sides of the battery pack 1 can better cooperate with the corresponding heat exchange components 2 for heat conduction, which is convenient for increasing the heat exchange area of ​​the battery pack 1. At the same time, each heat exchange component 2 extends along the arrangement direction of the multiple battery cells 10, so that each heat exchange component 2 can cooperate with each battery cell 10 in the battery pack 1 for heat conduction, so as to further increase the heat exchange area of ​​the battery pack 1, so that the heat exchange component 2 can efficiently dissipate the heat generated by the battery cell 10 when used for cooling, and can heat the battery cell 10 when used for heating, which is conducive to better regulating the temperature of the battery cell 10, so that the battery cell 10 can operate within a certain operating temperature range, thereby extending the service life of the battery device 200. Figure 5 In the example shown in FIG, three heat exchange components 2 are respectively arranged on the left side, right side and bottom side of the battery pack 1 .

[0081] In the related art, the heat exchange element is only provided on one side of the battery pack, so that the heat exchange area of ​​the battery pack is small, and the heat exchange capacity of the heat exchange element for the battery cell is weak, which affects the working performance and service life of the battery device. According to the battery device of the present application, multiple heat exchange elements 2 are respectively provided on different sides of the battery pack 1, so that at least two sides of the battery pack 1 can respectively exchange heat with the corresponding heat exchange element 2, and each heat exchange element 2 is convenient for heat exchange with each battery cell 10 of the battery pack 1, which is convenient for increasing the heat exchange area of ​​the battery pack 1, which is beneficial to improving the working performance and service life of the battery device.

[0082] Among them, the thermal conductive reinforcement 3 is fixed to the multiple battery cells 10 of the battery pack 1, and the thermal conductive reinforcement 3 is thermally coordinated with the multiple battery cells 10 of the battery pack 1. A thermal conductive reinforcement 3 is provided between at least one heat exchange component 2 and the battery pack 1, so that at least one of the multiple heat exchange components 2 is fixed to the battery pack 1 through the thermal conductive reinforcement 3, and the above-mentioned at least one of the multiple heat exchange components 2 is thermally coordinated with the battery pack 1 through the thermal conductive reinforcement 3.

[0083] It can be seen that the thermally conductive reinforcement 3 is arranged between the heat exchange element 2 and the battery pack 1. The heat exchange element 2 can exchange heat with the battery cell 10 through the thermally conductive reinforcement 3, so that the thermally conductive reinforcement 3 is not likely to affect the heat exchange between the heat exchange element 2 and the battery cell 10. At the same time, the thermally conductive reinforcement 3 can strengthen the battery pack 1 to a certain extent, facilitate the connection of multiple battery cells 10 of the battery pack 1 into a whole, facilitate the assembly and installation of the battery device 200, and facilitate the enhancement of the structural strength of the battery device 200, so as to improve the operating stability of the battery device 200 under different operating conditions. For example, when the battery cell 10 in the battery pack 1 expands during the charge and discharge process, the thermally conductive reinforcement 3 can play a certain role in limiting the expansion of the battery cell 10, thereby improving the stability of the battery device 200. For example, when the battery pack 1 needs to be installed on other components (such as the load beam described later), the battery pack 1 can be installed on other components through the thermally conductive reinforcement 3 without adjusting the heat exchange element 2. Obviously, the provision of the heat-conducting reinforcement member 3 reduces the load borne by at least one heat exchange element 2, so that the heat exchange element 2 is less susceptible to damage, thereby reducing the possibility of leakage of the heat exchange medium.

[0084] In the related art, the battery device is not provided with a thermally conductive reinforcement member, and a heat exchange member is used to support and limit the battery pack. At the same time, the heat exchange member also dissipates heat for the battery pack. The load-bearing requirements of the heat exchange member are relatively high. For example, the manufacturing material of the heat exchange member is aluminum, and the elastic modulus and tensile strength are low, which is not suitable for use as a strength-bearing function. When the battery pack is installed on other components through the heat exchange member, if the heat exchange member is subjected to a large load, the structural strength of the heat exchange member may fail, which will cause the heat exchange medium to leak, and thus easily cause an insulation short circuit in the battery device.

[0085] In the battery device 200 of the present application, the heat exchange component 2 and the thermal conductive reinforcement component 3 are separately arranged. The heat exchange component 2 is used to exchange heat for the battery pack 1. The thermal conductive reinforcement component 3 only needs to support the battery pack 1 to share the load of the heat exchange component 2, and it is convenient to group multiple battery cells 10 of the battery pack 1. When the battery pack 1 is installed on other components through the thermal conductive reinforcement component 3, even if the thermal conductive reinforcement component 3 is subjected to a certain large load, the problem of heat exchange medium leakage is not likely to occur, thereby improving the reliability of the battery device 200.

[0086] It can be understood that a thermal conductive reinforcement member 3 is provided between at least one heat exchange member 2 and the battery pack 1, including: Example 1, a thermal conductive reinforcement member 3 is provided between one of the heat exchange members 2 and the battery pack 1, and the above-mentioned heat exchange member 2 is indirectly fixed to the battery pack 1 through the thermal conductive reinforcement member 3, and other heat exchange members 2 can be directly fixed to the battery pack 1, and the above-mentioned heat exchange member 2 indirectly exchanges heat with the battery pack 1 through the thermal conductive reinforcement member 3, and other heat exchange members 2 can directly exchange heat with the battery pack 1; Example 2, a thermal conductive reinforcement member 3 is provided between each heat exchange member 2 and the battery pack 1, each heat exchange member 2 is indirectly fixed to the battery pack 1 through the thermal conductive reinforcement member 3, and each heat exchange member 2 indirectly exchanges heat with the battery pack 1 through the thermal conductive reinforcement member 3.

[0087] Therefore, the present application does not limit the number of heat-conducting reinforcement members 3 and heat-exchanging members 2. The number of heat-exchanging members 2 and the number of heat-conducting reinforcement members 3 can be equal or different. For example, the number of heat-conducting reinforcement members 3 can be less than or equal to the number of heat-exchanging members 2. The staff can make a choice based on the actual usage to improve the flexibility of the battery device 200. Figure 5 In the example, the left and right sides of the battery pack 1 are provided with heat exchange components 2 and thermally conductive reinforcement components 3, and the lower side of the battery pack 1 is provided with a heat exchange component 2 but not with a thermally conductive reinforcement component 3.

[0088] In addition, since the thermal conductive reinforcement 3 is arranged between the heat exchange component 2 and the battery pack 1, the internal force of the battery pack 1 can act on the thermal conductive reinforcement 3 without passing through the heat exchange component 2, so that the thermal conductive reinforcement 3 can better share the load of the heat exchange component 2 and effectively reduce the risk of leakage of the heat exchange medium due to damage to the heat exchange component 2.

[0089] It is understood that in the embodiments of the present application, the thermal coordination of two components means that heat exchange occurs between the two components. The two components can achieve heat transfer by direct contact or indirectly by abutting each other, for example, through the use of thermally conductive adhesive. Furthermore, there are no restrictions on the method of securing the thermally conductive reinforcement member 3 to the battery pack 1, nor on the method of securing the heat exchange member 2 to the corresponding thermally conductive reinforcement member 3. For example, the thermally conductive reinforcement member 3 can be bonded to the battery pack 1 using thermally conductive adhesive, and the heat exchange member 2 can be bonded to the thermally conductive reinforcement member 3 using thermally conductive adhesive.

[0090] Please refer to Figure 3-Figure 7 , in some embodiments, the plurality of heat exchange members 2 includes a first heat exchange member 21 and a second heat exchange member 22. The first heat exchange member 21 and the second heat exchange member 22 are respectively disposed on opposite sides of the battery pack 1 in the second direction, and the second direction is perpendicular to the first direction. By disposing the first heat exchange member 21 and the second heat exchange member 22 on opposite sides of the battery pack 1 in the second direction, the first heat exchange member 21 and the second heat exchange member 22 can respectively contact different sides of the battery pack 1, facilitating an increase in the heat exchange area of the battery pack 1, improving the heat exchange efficiency of the battery pack 1, facilitating better control of the operating temperature of each battery cell 10, and improving the stability of the battery device 200; and / or, the plurality of heat exchange members 2 includes a first heat exchange member 21 and a third heat exchange member 23. The first heat exchange member 21 is disposed on one side of the battery pack 1 in the second direction, and the third heat exchange member 23 is disposed on one side of the battery pack 1 in the third direction. The first direction, the second direction, and the third direction are perpendicular to each other pairwise, that is, the first heat exchange member 21 and the third heat exchange member 23 can conduct heat with different sides of the battery pack 1, facilitating an increase in the heat exchange area of the battery pack 1, improving the heat exchange efficiency of the battery pack 1, facilitating better control of the operating temperature of each battery cell 10, and improving the stability of the battery device 200. Thus, the arrangement of the plurality of heat exchange members 2 is relatively flexible, facilitating the satisfaction of actual differentiated requirements. It can be understood that at least two of the plurality of heat exchange members 2 can be respectively disposed on opposite sides of the battery pack 1, and / or, at least two of the plurality of heat exchange members 2 can be respectively disposed on adjacent sides of the battery pack 1.

[0091] For example, the plurality of heat exchange members 2 can include a first heat exchange member 21, a second heat exchange member 22, and a third heat exchange member 23. The first heat exchange member 21 and the second heat exchange member 22 are respectively disposed on opposite sides of the battery pack 1 in the second direction, and the third heat exchange member 23 is disposed on one side of the battery pack 1 in the third direction, so that the plurality of heat exchange members 2 can conduct heat with different sides of the battery pack 1. For example, in the orthographic projection of the battery device 200 in the first direction, the first heat exchange member 21, the second heat exchange member 22, and the third heat exchange member 23 are configured as a "U" shape, a "凵" shape, etc., facilitating an increase in the heat exchange area of the battery pack 1, enabling better control of the operating temperature of each battery cell 10, and thus improving the stability of the battery device 200.

[0092] Please refer to Figure 3-Figure 7In some embodiments, the plurality of heat exchange elements 2 include a first heat exchange element 21 and a second heat exchange element 22, the plurality of heat conductive reinforcement elements 3 include a first heat conductive reinforcement element 34 and a second heat conductive reinforcement element 35, the first heat conductive reinforcement element 34 is provided between the first heat exchange element 21 and the battery pack 1, that is, the first heat exchange element 21 is fixed to the battery pack 1 through the first heat conductive reinforcement element 34 and the second heat conductive reinforcement element 35 is provided between the second heat exchange element 22 and the battery pack 1, that is, the second heat exchange element 22 is fixed to the battery pack 1 through the second heat conductive reinforcement element 35 and the first heat conductive reinforcement element 34 and the second heat conductive reinforcement element 35 are provided between the second heat exchange element 22 and the battery pack 1. The reinforcement members 35 are respectively arranged on two opposite sides of the battery pack 1 in the second direction, so that the multiple battery cells 10 of the battery pack 1 can be better connected into a whole, thereby improving the reliability of the group, so as to further improve the structural stability of the battery device 200; and if the battery pack 1 needs to be installed on other components, the first thermal conductive reinforcement member 34 and the second thermal conductive reinforcement member 35 are respectively arranged on two opposite sides of the battery pack 1 in the second direction, so that the battery pack 1 can be more conveniently installed on other components through the first thermal conductive reinforcement member 34 and the second thermal conductive reinforcement member 35, so that the installation position of the battery pack 1 after installation is more stable and reliable.

[0093] Please refer to Figure 3-Figure 7 In some embodiments, each of the first thermally conductive reinforcement member 34 and the second thermally conductive reinforcement member 35 has a mounting portion, and the mounting portion is fixedly matched with the load-bearing beam of the battery device 200 .

[0094] It can be seen that the first thermal conductive reinforcement 34 and the second thermal conductive reinforcement 35 are respectively arranged on the opposite sides of the battery pack 1 in the second direction, that is, the mounting portion on the first thermal conductive reinforcement 34 and the mounting portion on the second thermal conductive reinforcement 35 are also respectively located on both sides of the battery pack 1 in the second direction, so that after the mounting portion is fixedly matched with the load-bearing beam, the setting position of the battery pack 1 can be more stable, and even if the battery pack 1 is subjected to impact or vibration, the battery pack 1 is not easy to separate from the load-bearing beam, thereby improving the reliability of the battery device 200.

[0095] It can be understood that each of the first thermal conductive reinforcement member 34 and the second thermal conductive reinforcement member 35 can have one or more mounting portions, respectively, and the number of mounting portions on the first thermal conductive reinforcement member 34 and the number of mounting portions on the second thermal conductive reinforcement member 35 can be equal or different to further improve the installation reliability of the battery device 200.

[0096] Please refer to Figure 3-Figure 7 In some embodiments, each battery cell 10 has a first wall 11 , which is the wall with the largest area in the battery cell 10 , and the first wall 11 is perpendicular to the first direction, or the first wall 11 is perpendicular to the second direction.

[0097] Among them, the poles 13 of the multiple battery cells 10 of the battery pack 1 are all located at one end of the battery cell 10 in the third direction. In the third direction, the distance between each of the first heat exchange member 21 and the second heat exchange member 22 and the other end of the battery cell 10 in the third direction is less than the distance between it and the above-mentioned end of the battery cell 10 in the third direction. The distance between the first heat exchange member 21 and the other end of the battery cell 10 in the third direction is less than the distance between the first heat exchange member 21 and the above-mentioned end of the battery cell 10 in the third direction, and the distance between the second heat exchange member 22 and the other end of the battery cell 10 in the third direction is less than the distance between the second heat exchange member 22 and the above-mentioned end of the battery cell 10 in the third direction. In the third direction, the height of each of the first heat exchange member 21 and the second heat exchange member 22 (such as Figure 7 L1 in) is less than or equal to the height of the battery cell 10 (such as Figure 7 60% of L2 in the figure, and the height of each of the first heat exchange member 21 and the second heat exchange member 22 (such as Figure 7 L1 in) is greater than or equal to the height of the battery cell 10 (such as Figure 7 30% of L2 in the third direction), the first direction and the second direction are respectively perpendicular to the third direction; and / or the first heat exchange member 21 and the second heat exchange member 22 are both arranged adjacent to one end of the battery cell 10 in the third direction, and the distance between the above-mentioned one end of the battery cell 10 and the mounting portion in the third direction (such as Figure 7 L3) is less than or equal to the height of the battery cell 10 (such as Figure 7 80% of L2 in the figure, and the distance between the above-mentioned one end of the battery cell 10 and the mounting portion in the third direction (such as Figure 7 L3) is greater than or equal to the height of the battery cell 10 (such as Figure 7 50% of L2 in .

[0098] The first wall 11 is the largest wall in the battery cell 10 and is perpendicular to the first direction. Multiple battery cells 10 in the battery pack 1 are arranged sequentially along the first direction. For example, the first walls 11 of multiple battery cells 10 are positioned in close proximity, with the first heat exchange element 21 and the second heat exchange element 22 respectively thermally cooperating with the side walls of the multiple battery cells 10. Alternatively, the first wall 11 is perpendicular to the second direction. For example, the side walls of multiple battery cells 10 are positioned in close proximity, with the first heat exchange element 21 and the second heat exchange element 22 respectively thermally cooperating with the first walls 11 of the multiple battery cells 10. This allows for greater flexibility in the arrangement of the multiple battery cells 10 in the battery pack 1, allowing personnel to freely select the arrangement based on actual heat exchange requirements and space constraints.

[0099] The poles 13 of the multiple battery cells 10 in the battery pack 1 are all located at one end of the battery cell 10 in the third direction. In the third direction, the distance between the first heat exchange member 21 and the second heat exchange member 22 and the end of the battery cell 10 without the pole 13 is smaller than the distance between the first heat exchange member 21 and the second heat exchange member 22 and the end of the battery cell 10 with the pole 13, that is, in the third direction, the first heat exchange member 21 and the second heat exchange member 22 are closer to the end of the battery cell 10 without the pole 13, so that the first heat exchange member 21 and the second heat exchange member 22 are not likely to affect the pole 13 of the battery cell 10. At the same time, the first heat exchange member 21 and the second heat exchange member 22 There will be no significant restriction on the position of the mounting portion in the third direction; when the height of each of the first heat exchange member 21 and the second heat exchange member 22 is greater than 60% of the height of the battery cell 10, so that the first heat exchange member 21 and the second heat exchange member 22 have a larger coverage range, but a first heat conductive reinforcement member 34 is further provided between the first heat exchange member 21 and the battery pack 1, and a second heat conductive reinforcement member 35 is further provided between the second heat exchange member 22 and the battery pack 1, and the first heat conductive reinforcement member 34 and the second heat conductive reinforcement member 35 are respectively provided with mounting portions that cooperate with the load-bearing beam of the battery device 200, the height settings of the first heat exchange member 21 and the second heat exchange member 22 will be Increasing the restriction on the height position of the mounting portion, the mounting portion may also need to be set at a higher position to reduce the possibility of interference between the mounting portion and the load-bearing beam and the first heat exchange member 21 and the second heat exchange member 22 when assembled. However, if the mounting portion is set too high, it will affect the stability of the battery device 200 when installed on the battery device 200, thereby reducing the reliability of the battery device 200; when the height of each of the first heat exchange member 21 and the second heat exchange member 22 is less than 30% of the height of the battery cell 10, the coverage of the first heat exchange member 21 and the second heat exchange member 22 is small, reducing the first heat exchange member 21 and the second heat exchange member 22 and the battery pack 1, thereby reducing the heat exchange efficiency of the battery pack 1, being unfavorable for better regulating the operating temperatures of the multiple battery cells 10, and reducing the reliability of the battery device 200; by setting the height of each of the first heat exchange element 21 and the second heat exchange element 22 within 30% to 60% of the height of the battery cell 10, so that the first heat exchange element 21 and the second heat exchange element 22 have a sufficient coverage range, it is convenient to better regulate the operating temperatures of the multiple battery cells 10, and at the same time, the first heat exchange element 21 and the second heat exchange element 22 will not excessively limit the height of the installation portion, so as to improve the stability of the battery device 200 installed on the battery device 200.

[0100] The first heat exchange member 21 and the second heat exchange member 22 are both arranged adjacent to one end of the battery cell 10 in the third direction. For example, the battery device 200 further includes a third heat exchange member 23, and the third heat exchange member 23 is arranged on the side of the battery pack 1 in the third direction where the pole 13 is not provided, that is, the poles 13 of the multiple battery cells 10 of the battery pack 1 are all located on the side of the battery cell 10 away from the third heat exchange member 23, and the poles 13 of the multiple battery cells 10 and the third heat exchange member 23 are respectively located on both sides of the battery cell 10 in the third direction, so that the third heat exchange member 23 does not need to be designed to avoid the pole 13, making the structure of the third heat exchange member 23 simpler. The first heat exchange member 21 and the second heat exchange member 22 are both arranged adjacent to the end of the battery cell 10 in the third direction where the third heat exchange member 23 is provided; when the above-mentioned end of the battery cell 10 is between the mounting portion When the spacing in the third direction is greater than 80% of the height of the battery cell 10, the mounting portion is located at a higher position, thereby increasing the requirement for the height of the load-bearing beam. When the spacing between the above-mentioned one end of the battery cell 10 and the mounting portion in the third direction is less than 50% of the height of the battery cell 10, the mounting portion is located at a lower position. When the battery pack 1 is installed on the load-bearing beam through the mounting portion, the fixing point of the mounting portion and the load-bearing beam is located at a lower position, so that the battery pack 1 may be prone to shaking, affecting the reliability of the battery device 200. By setting the spacing between the above-mentioned one end of the battery cell 10 and the mounting portion in the third direction within the range of 50% to 80% of the height of the battery cell 10, the restriction on the height of the load-bearing beam is reduced, and at the same time, the battery pack 1 has good stability after being installed on the load-bearing beam through the mounting portion.

[0101] Please refer to Figure 3-Figure 5 and Figure 7 In some embodiments, at least one of the first thermal conductive reinforcement member 34 and the second thermal conductive reinforcement member 35 includes a side plate 31 and a pull plate 32. The side plate 31 is arranged between the corresponding heat exchange component 2 and the battery pack 1. The pull plate 32 is bent and connected to the side plate 31, and the pull plate 32 extends from the side plate 31 in the second direction toward a direction away from the battery pack 1. The corresponding heat exchange component 2 is located on one side of the pull plate 32 in the third direction to achieve an avoidance setting between the corresponding heat exchange component 2 and the pull plate 32. The mounting portion is formed on the pull plate 32, and the first direction and the second direction are respectively perpendicular to the third direction.

[0102] It can be seen that the side plate 31 is arranged between the heat exchange element 2 and the battery pack 1, the pull plate 32 is bent and connected to the side plate 31, and the pull plate 32 extends from the side plate 31 in the second direction toward the direction away from the battery pack 1, so that the structure of the pull plate 32 and the side is relatively simple, for example, the pull plate 32 and the side plate 31 are formed into a "┎" shape, a "├" shape, etc., which is convenient for processing and manufacturing; the corresponding heat exchange element 2 is located on the side of the pull plate 32 in the third direction, for example, the first heat conductive reinforcement 34 includes the pull plate 32 and the side plate 31, the second heat conductive reinforcement 34 includes the pull plate 32 and the side plate 31, and the second heat conductive reinforcement 34 includes the pull plate 32 and the side plate 31. A heat exchange component 21 is located on one side of the above-mentioned pull plate 32 in the third direction. For example, the second heat conductive reinforcement member 35 includes a pull plate 32 and a side plate 31. The second heat exchange component 22 is located on one side of the above-mentioned pull plate 32 in the third direction. The mounting portion is formed on the pull plate 32. Since the corresponding heat exchange components 2 are all located on one side of the pull plate 32 in the third direction, when the mounting portion is assembled with the load-bearing beam, the corresponding heat exchange components 2 are not likely to affect the assembly of the battery device 200, thereby improving the reliability of the battery device 200.

[0103] Exemplarily, the first thermal conductive reinforcement 34 and the second thermal conductive reinforcement 35 both include a pull plate 32 and a side plate 31, the first heat exchange member 21 and the pull plate 32 of the first thermal conductive reinforcement 34 are spaced apart in the third direction, and the first heat exchange member 21 is located on the side of the pull plate 32 of the first thermal conductive reinforcement 34 in the third direction, so that the first heat exchange member 21 does not need to bypass the pull plate 32 of the first thermal conductive reinforcement 34, the second heat exchange member 22 and the pull plate 32 of the second thermal conductive reinforcement 35 are spaced apart in the third direction, and the second heat exchange member 22 is located on the side of the pull plate 32 of the second thermal conductive reinforcement 35 in the third direction, so that the second heat exchange member 22 does not need to bypass the pull plate 32 of the second thermal conductive reinforcement 35, so that the first heat exchange member 21 and the second heat exchange member 22 are not likely to affect the assembly of the battery device 200, thereby improving the reliability of the battery device 200.

[0104] Please refer to Figure 3-Figure 5 and Figure 7 In some embodiments, the side plate 31 includes a first plate portion 31a and a second plate portion 31b that are integrally connected. The first plate portion 31a and the second plate portion 31b are respectively located on both sides of the pull plate 32 in the third direction. The pull plate 32 is connected at the connection position of the first plate portion 31a and the second plate portion 31b. For example, the side plate 31 and the pull plate 32 are configured as a "├" shape, so that the structure of the pull plate 32 and the side plate 31 is relatively simple, which is convenient for improving manufacturing efficiency. At the same time, the pull plate 32 is connected at the connection position of the first plate portion 31a and the second plate portion 31b, and the mounting portion is located on the pull plate 32, so that after the battery pack 1 is fixed to the battery device 200 through the mounting portion, the pull plate 32 has better connection strength, so that the pull plate 32 can better bear the gravity or external impact of the battery pack 1, thereby improving the reliability of the battery device 200.

[0105] Please refer to Figure 5 and Figure 7In some embodiments, the battery cell 10 includes a shell 12, and the two ends of the shell 12 in the third direction are respectively a first end 12a and a second end 12b. In the third direction, the distance between the heat exchange element 2 corresponding to the side plate 31 and the first end 12a is smaller than the distance between the above-mentioned heat exchange element 2 and the second end 12b. For example, the distance between the first heat exchange element 21 and the first end 12a is smaller than the distance between the first heat exchange element 21 and the second end 12b, and / or the distance between the second heat exchange element 22 and the first end 12a is smaller than the distance between the second heat exchange element 22 and the second end 12b. The side plate 31 extends to be flush with or beyond the second end 12b.

[0106] It can be seen that the distance between the heat exchange element 2 corresponding to the side plate 31 and the first end 12a is smaller than the distance between the above-mentioned heat exchange element 2 and the second end 12b. Compared with the second end 12b, the heat exchange element 2 corresponding to the side plate 31 is arranged closer to the first end 12a, and the corresponding heat exchange element 2 is located on the side of the pull plate 32 in the third direction. Through the arrangement of the above-mentioned heat exchange element 2, the restriction on the setting position of the pull plate 32 in the third direction is reduced; the other end of the side plate 31 extends to the second end 12b and is flush with or exceeds the second end 12b, so that the side plate 31 has a larger coverage area, which is convenient for improving the protection and support capabilities of the side plate 31, and is beneficial to improving the reliability of the battery device 200.

[0107] For example, in the third direction, the pole 13 of the battery cell 10 is arranged adjacent to the second end 12b, the heat exchange component 2 corresponding to the side plate 31 is arranged adjacent to the first end 12a, and the other end of the side plate 31 extends to the second end 12b and is flush with or exceeds the second end 12b. Then, the other end of the side plate 31 can be arranged flush with or exceed the pole 13, so that the side plate 31 can play a certain protective role on the pole 13, so that the side plate 31 has a larger coverage range, which is convenient for improving the protection and support capabilities of the side plate 31, and is beneficial to improving the reliability of the battery device 200.

[0108] Please refer to Figure 7 In some embodiments, each of the first thermally conductive reinforcement member 34 and the second thermally conductive reinforcement member 35 has a supporting portion 33, and the supporting portion 33 is stopped at one end of the battery pack 1 in the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0109] It can be seen that the supporting portion 33 stops at one end of the battery pack 1 in the third direction. The supporting portion 33 can be used to support multiple battery cells 10, so that when the battery pack 1 is hoisted from the third direction, the weight of the multiple battery cells 10 can be effectively supported by the supporting portion 33, and the multiple battery cells 10 are not prone to sagging or falling off, which facilitates improving the structural stability of the battery device 200 and thus improving the reliability of the battery device 200.

[0110] Please refer to Figure 7In some embodiments, the multiple heat exchange elements 2 further include a third heat exchange element 23, the third heat exchange element 23 and the supporting portion 33 are arranged on the same side of the battery pack 1, the third heat exchange element 23 is arranged between the two supporting portions 33, and the third heat exchange element 23 is spaced apart from the first heat exchange element 21 and the second heat exchange element 22.

[0111] As can be seen, the third heat exchange element 23 is spaced apart from the first heat exchange element 21 and the second heat exchange element 22, i.e., the first heat exchange element 21, the second heat exchange element 22, and the third heat exchange element 23 are separately provided. When the three heat exchange elements 2 require replacement or maintenance, they can be maintained or replaced individually, reducing the maintenance cost of the battery device 200. Specifically, the third heat exchange element 23 is disposed between the two supporting portions 33. The third heat exchange element 23 is located on one side of the battery pack 1 in the third direction, so that the third heat exchange element 23 can further increase the heat exchange area of ​​the battery pack 1. At the same time, the third heat exchange element 23 is spaced apart from the two supporting portions 33 so that the third heat exchange element 23 is less likely to affect the support provided by the two supporting portions 33 to the battery pack 1, thereby improving the reliability of the battery device 200.

[0112] Please refer to Figure 7 In some embodiments, in the second direction, the width of the third heat exchange element 23 (eg Figure 7 L4 in) is less than or equal to the width of the battery cell 10 (such as Figure 7 85% of L5 in FIG, and the width of the third heat exchange element 23 (such as Figure 7 L4 in) is greater than or equal to the width of the battery cell 10 (such as Figure 7 60% of L5 in the .

[0113] It can be seen that when the width of the third heat exchange element 23 is greater than 85% of the width of the battery cell 10, the third heat exchange element 23 has a larger coverage range, but the third heat exchange element 23 will impose certain restrictions on the width of the two supporting parts 33, which may weaken the bearing capacity of the two supporting parts 33 and affect the reliability of the battery device 200. When the width of the third heat exchange element 23 is less than 60% of the width of the battery cell 10, the coverage range of the third heat exchange element 23 is smaller, which reduces the heat exchange area of ​​the battery pack 1 and affects the heat exchange efficiency of the battery pack 1. By setting the width of the third heat exchange element 23 within the range of 60% to 85% of the width of the battery cell 10, the two supporting parts 33 have sufficient structural strength, and the third heat exchange element 23 can have a relatively good heat exchange area, which is convenient for improving the reliability of the battery device 200.

[0114] Please refer to Figure 3 and Figure 4 In some embodiments, the battery device 200 further includes an end plate 4, two end plates 4, and the two end plates 4 are respectively arranged on both sides of the battery pack 1 in the first direction, and each end plate 4 is respectively fixed to the first thermal conductive reinforcement 34 and the second thermal conductive reinforcement 35.

[0115] It can be seen that the two end plates 4 are respectively arranged on both sides of the battery pack 1 in the first direction, and the first thermal conductive reinforcement 34 and the second thermal conductive reinforcement 35 are respectively arranged on both sides of the battery pack 1 in the second direction. Each end plate 4 is fixed to the first thermal conductive reinforcement 34 and the second thermal conductive reinforcement 35, respectively. The two end plates 4, the first thermal conductive reinforcement 34 and the second thermal conductive reinforcement 35 can define an annular structure so that the battery device 200 can have better structural strength, can effectively limit the expansion of multiple battery cells 10, play a certain restraining role, and improve the reliability of the battery device 200.

[0116] It is understandable that there is no specific limitation on the fixing method between the end plate 4 and the first heat-conducting reinforcement member 34 , and the fixing method between the end plate 4 and the second heat-conducting reinforcement member 35 . For example, they can be connected by bolts, rivets, welding, gluing, etc.

[0117] Please refer to Figure 5 and Figure 7 In some embodiments, on a preset plane, the orthographic projection area of ​​the cavity 20 of each of the first heat exchange member 21 and the second heat exchange member 22 is less than or equal to 80% of the orthographic projection area of ​​the first thermal conductive reinforcement member 34 or the second thermal conductive reinforcement member 35, and greater than or equal to 50% of the orthographic projection area of ​​the first thermal conductive reinforcement member 34 or the second thermal conductive reinforcement member 35, and the preset plane is perpendicular to the second direction.

[0118] It can be seen that the preset plane is perpendicular to the second direction. For example, the preset plane is a longitudinal section of the battery device 200. The orthographic projection area of ​​the cavity 20 of each of the first heat exchange member 21 and the second heat exchange member 22 is less than or equal to 80% of the orthographic projection area of ​​the first thermal conductive reinforcement member 34 or the second thermal conductive reinforcement member 35, and the orthographic projection area of ​​the cavity 20 of each of the first heat exchange member 21 and the second heat exchange member 22 is greater than or equal to 50% of the orthographic projection area of ​​the first thermal conductive reinforcement member 34 or the second thermal conductive reinforcement member 35, so that the cavity 20 has sufficient area for the heat exchange medium to flow, so that the battery pack 1 can have a relatively good heat exchange capacity. At the same time, the dimensions of the first heat exchange member 21 and the second heat exchange member 22 in the third direction do not need to be too large, which reduces the possibility of interference between the first heat exchange member 21 and the second heat exchange member 22 and the mounting portion, thereby improving the reliability of the battery device 200.

[0119] In some embodiments, each of the first thermal conductive reinforcement 34 and the second thermal conductive reinforcement 35 has a mounting portion, and the battery device 200 also includes a first load-bearing beam and a second load-bearing beam. The first load-bearing beam and the second load-bearing beam are respectively arranged on opposite sides of the battery pack 1 in the second direction. The first load-bearing beam is fixed to the mounting portion of the first thermal conductive reinforcement 34, and the second load-bearing beam is fixed to the mounting portion of the second thermal conductive reinforcement 35. The second direction is perpendicular to the first direction.

[0120] It can be seen that the first load-bearing beam is fixed to the mounting portion of the first thermally conductive reinforcement 34, and the second load-bearing beam is fixed to the mounting portion of the second thermally conductive reinforcement 35. The first thermally conductive reinforcement 34 and the second thermally conductive reinforcement 35 are respectively located on opposite sides of the battery pack 1 in the second direction, that is, the mounting portion on the first thermally conductive reinforcement 34 and the mounting portion on the second thermally conductive reinforcement 35 are also located on both sides of the battery pack 1 in the second direction. By fixing the opposite sides of the battery pack 1 to the first load-bearing beam and the second load-bearing beam respectively, the setting position of the battery pack 1 is made more stable, thereby improving the reliability of the battery device 200.

[0121] In some embodiments, at least one of the first load-bearing beam and the second load-bearing beam is fixed to the mounting portion by threaded fasteners; and / or, at least one of the first load-bearing beam and the second load-bearing beam includes a first beam body and a second beam body fixedly connected to each other, and the first beam body and the second beam body are clamped on opposite sides of the mounting portion in a third direction, and the first direction and the second direction are respectively perpendicular to the third direction.

[0122] Illustratively, the first load-bearing beam is fixed to the mounting portion by threaded fasteners, or the second load-bearing beam is fixed to the mounting portion by threaded fasteners, or both the first load-bearing beam and the second load-bearing beam are fixed to the corresponding mounting portions by threaded fasteners, so that the assembly and disassembly of the battery device 200 are more convenient. At the same time, under the tightening force of the threaded fasteners, the first load-bearing beam and the second load-bearing beam are not easily separated from the mounting portion, thereby improving the reliability of the battery device 200.

[0123] Optionally, the threaded fastener is a screw to facilitate assembly and disassembly of the battery device 200 .

[0124] Exemplarily, the first load-bearing beam includes a first beam body and a second beam body fixedly connected, or the second load-bearing beam includes a first beam body and a second beam body fixedly connected, or both the first beam body and the second beam body include a first beam body and a second beam body fixedly connected. By clamping the first beam body and the second beam body on opposite sides of the corresponding mounting portion in the third direction, the setting position of the battery device 200 is made more stable. Even when the battery device 200 is subjected to external force, the battery device 200 is not prone to shaking, falling off, etc., thereby improving the reliability of the battery device 200.

[0125] Please refer to Figure 3-Figure 6 In some embodiments, the plurality of heat exchange elements 2 include a first heat exchange element 21 , a second heat exchange element 22 and a third heat exchange element 23 , and at least one of the first heat exchange element 21 and the second heat exchange element 22 is integrally connected to the third heat exchange element 23 .

[0126] It can be seen that at least one of the first heat exchanger 21 and the second heat exchanger 22 is integrally connected to the third heat exchanger 23. For example, the first heat exchanger 21 is integrally connected to the third heat exchanger 23, so that the first heat exchanger 21 and the third heat exchanger 23 are formed into an L shape, or the second heat exchanger 22 and the third heat exchanger 23 are integrally connected, so that the second heat exchanger 22 and the third heat exchanger 23 are formed into an L shape, or the first heat exchanger 21 and the second heat exchanger 22 are integrally connected to the third heat exchanger 23, so that the first heat exchanger 21, the second heat exchanger 22 and the third heat exchanger 23 are formed into a U shape.

[0127] The thermally conductive reinforcement member 3 corresponding to at least one of the first heat exchange member 21 and the second heat exchange member 22 is spaced apart from the end of the battery cell 10 corresponding to the third heat exchange member 23 in the third direction. For example, the first heat exchange member 21 and the third heat exchange member 23 are integrally connected. In the third direction, the thermally conductive reinforcement member 3 corresponding to the first heat exchange member 21 is spaced apart from the end of the battery pack 1 corresponding to the third heat exchange member 23. This allows the thermally conductive reinforcement member 3 corresponding to the first heat exchange member 21 to be bent and connected when the first and third heat exchange members 21, 23 on different sides of the battery pack 1 are bent and connected without requiring complex bending to avoid the thermally conductive reinforcement member 3 corresponding to the first heat exchange member 21. This reduces the bending requirements for the first and third heat exchange members 21, 23, and improves the assembly efficiency of the battery device 200. For another example, the second heat exchanger 22 is integrally connected to the third heat exchanger 23. In the third direction, the thermal conductive reinforcement member 3 corresponding to the second heat exchanger 22 is spaced apart from one end of the battery pack 1 corresponding to the third heat exchanger 23, so that when the second heat exchanger 22 and the third heat exchanger 23 located on different sides of the battery pack 1 are bent and connected, more complicated bending is not required, and the thermal conductive reinforcement member 3 corresponding to the second heat exchanger 22 can be avoided, thereby reducing the bending requirements for the second heat exchanger 22 and the third heat exchanger 23 and improving the assembly efficiency of the battery device 200. For another example, the first heat exchanger 21 and the second heat exchanger 22 are both integrally connected to the third heat exchanger 23. In the third direction, the thermal conductive reinforcement 3 corresponding to the first heat exchanger 21 is spaced apart from the end of the battery pack 1 corresponding to the third heat exchanger 23. At the same time, the thermal conductive reinforcement 3 corresponding to the second heat exchanger 22 is also spaced apart from the end of the battery pack 1 corresponding to the third heat exchanger 23. This allows the first heat exchanger 21, the second heat exchanger 22 and the third heat exchanger 23 located on different sides of the battery pack 1 to be bent and connected without the need for more complicated bending. The thermal conductive reinforcement 3 corresponding to the first heat exchanger 21 and the thermal conductive reinforcement 3 corresponding to the second heat exchanger 22 can be avoided, thereby reducing the bending requirements for the first heat exchanger 21, the second heat exchanger 22 and the third heat exchanger 23 and improving the assembly efficiency of the battery device 200.

[0128] Please refer to Figure 3-Figure 7In some embodiments, the multiple heat exchange elements 2 include a first heat exchange element 21, a second heat exchange element 22 and a third heat exchange element 23, and the poles 13 of the multiple battery cells 10 of the battery pack 1 are all located on the side of the battery cell 10 away from the third heat exchange element 23, that is, the poles 13 of the multiple battery cells 10 and the third heat exchange element 23 are respectively located on opposite sides of the battery cell 10.

[0129] Exemplarily, the third direction is the up and down direction of the battery device 200. On the cross section of the battery device 200, the first heat exchanger 21 and the second heat exchanger 22 are respectively on the left and right sides of the battery device 200. The poles 13 of the multiple battery cells 10 of the battery pack 1 are respectively located on the upper side of the battery device 200, and the third heat exchanger 23 is located on the lower side of the battery device 200. The pole 13 can be electrically connected with other components to realize the charging and discharging of the battery device 200. By arranging the third heat exchanger 23 and the pole 13 on the upper and lower sides of the battery device 200 respectively, the third heat exchanger 23 does not need to avoid the pole 13 and make other designs, so that the structure of the third heat exchanger 23 can be simpler. For example, the third heat exchanger 23 can be a plate-like structure, which is convenient for improving the manufacturing efficiency of the third heat exchanger 23.

[0130] Please refer to Figure 3-Figure 7 In some embodiments, at least two adjacent heat exchange elements 2 are integrally connected, for example, the first heat exchange element 21 and the third heat exchange element 23 are integrally connected, or the second heat exchange element 22 and the third heat exchange element 23 are integrally connected, or the first heat exchange element 21, the second heat exchange element 22 and the third heat exchange element 23 are integrally connected, so as to improve the manufacturing efficiency of the plurality of heat exchange elements 2, so as to make it more convenient to assemble the plurality of heat exchange elements 2 in the battery pack 1, and to improve the assembly efficiency of the battery device 200; and / or, two adjacent heat exchange elements 2 are arranged at intervals, that is, The first heat exchanger 21, the second heat exchanger 22 and the third heat exchanger 23 are all separately arranged to make the structures of the first heat exchanger 21, the second heat exchanger 22 and the third heat exchanger 23 simpler. For example, the heat exchanger 2 is a plate-shaped structure, which is convenient for improving the manufacturing efficiency of the heat exchanger 2. At the same time, when the first heat exchanger 21, the second heat exchanger 22 and the third heat exchanger 23 are assembled in the battery pack 1, they do not need to be matched with the corners of the battery pack 1, so that the assembly of the heat exchanger 2 is simpler, which is convenient for improving the assembly efficiency of the battery device 200.

[0131] For example, the first heat exchanger 21, the second heat exchanger 22 and the third heat exchanger 23 are connected as a whole. The staff can first make the first heat exchanger 21, the second heat exchanger 22 and the third heat exchanger 23 into an integral plate structure, and then bend the above-mentioned whole into a U shape, and then match it to the battery pack 1 through adhesive or other fixing methods; and / or, the first heat exchanger 21, the second heat exchanger 22 and the third heat exchanger 23 are all split parts. The staff can first make the first heat exchanger 21, the second heat exchanger 22 and the third heat exchanger 23 into a split plate structure, and then respectively match the first heat exchanger 21, the second heat exchanger 22 and the third heat exchanger 23 to the battery pack 1 through adhesive or other fixing methods.

[0132] Please refer to Figure 5 and Figure 7 In some embodiments, at least one heat exchange element 2 includes a flat plate 24 and a flow channel plate 25 stacked along its thickness direction. The flow channel plate 25 has a flat portion 25a and a protruding portion 25b. The flat portion 25a is fixed to the flat plate 24 to make the mating surface of the flow channel plate 25 and the flat plate 24 more flat, thereby improving the structural stability of the heat exchange element 2; the protruding portion 25b is protruded relative to the flat portion 25a in a direction away from the flat plate 24 and is spaced from the flat plate 24 so that a cavity 20 is defined between the flow channel plate 25 and the flat plate 24. The flat plate 24 is provided between the battery pack 1 and the flow channel plate 25. By protruding the protruding portion 25b, the flow channel plate 25 and the flat plate 24 are formed. 5b is provided to protrude in the direction away from the flat plate 24, that is, the protrusion 25b is provided to protrude in the direction away from the battery pack 1, so that the protrusion 25b is not likely to affect the arrangement of the battery pack 1, and at the same time, the protrusion 25b and the flat plate 24 are spaced apart to define a cavity 20, that is, the medium in the cavity 20 can exchange heat with the battery pack 1 through the flat plate 24, and the heat exchange surface is relatively flat, so that the heat exchange uniformity of the heat exchange component 2 is better, and the overall operating temperature of the battery cell 10 is more balanced, which is convenient for improving the reliability of the battery device 200. At the same time, the structure of the above-mentioned heat exchange component 2 is relatively simple, which is convenient for improving the processing and manufacturing efficiency of the heat exchange component 2.

[0133] It can be understood that the battery device 200 includes multiple heat exchange elements 2, wherein one heat exchange element 2 includes a flat plate 24 and a flow channel plate 25 stacked along its thickness direction, or multiple heat exchange elements 2 include flat plates 24 stacked along its thickness direction. Figure 5 In the example, the thickness direction of the first heat exchange element 21 and the second heat exchange element 22 is the second direction, and the first heat exchange element 21 and the second heat exchange element 22 both include a flat plate 24 and a flow channel plate 25 stacked along the second direction; the thickness direction of the third heat exchange element 23 is the third direction, and the third heat exchange element 23 includes a flat plate 24 and a flow channel plate 25 stacked along the third direction.

[0134] Please refer to Figure 3-Figure 6In some embodiments, the flat plates 24 of two adjacent heat exchange elements 2 are integrally connected, and the flat plates 24 of the two adjacent heat exchange elements 2 can be integrally formed, which is convenient for improving the processing efficiency of the flat plates 24; the flow channel plates 25 of two adjacent heat exchange elements 2 are integrally connected, and the flow channel plates 25 of the two adjacent heat exchange elements 2 can be integrally formed, which is convenient for improving the processing efficiency of the flat plates 24.

[0135] As can be seen, since the multiple heat exchange elements 2 are located on different sides of the battery pack 1, the flat plates 24 and flow channel plates 25 of two adjacent heat exchange elements 2 can be first fixed together, then the flat plates 24 and flow channel plates 25 can be bent together, and then the flat plates 24 can be attached to the battery pack 1 using adhesive or other fixing methods. This simplifies the assembly process of the heat exchange elements 2 and improves the production efficiency of the battery device 200.

[0136] Of course, in other embodiments of the present application, the flat plate 24 and the flow channel plate 25 of the heat exchanger 2 can also be integrally formed. For example, the flat plate 24 and the flow channel plate 25 of two adjacent heat exchangers 2 can be integrally formed, so that the above-mentioned flat plate 24 and the flow channel plate 25 are formed into an integral part. The staff only needs to bend the integrally formed flat plate 24 and the flow channel plate 25 to assemble them into the battery pack 1, which is beneficial to further improve the production efficiency of the battery device 200.

[0137] For example, the plurality of heat exchange elements 2 include a first heat exchange element 21, a second heat exchange element 22 and a third heat exchange element 23. The first heat exchange element 21 and the second heat exchange element 22 are respectively arranged on opposite sides of the battery pack 1 in the second direction, and the third heat exchange element 23 is arranged on one side of the battery pack 1 in the third direction. The first direction, the second direction and the third direction are perpendicular to each other, and the flat plates 24 of the two adjacent heat exchange elements 2 are integrally connected, and the flow channel plates 25 of the two adjacent heat exchange elements 2 are integrally connected, which may include: Example 1, the first heat exchange element 21 and the third heat exchange element The flat plate 24 of the first heat exchange element 23 is connected as a whole, and the flow channel plate 25 of the first heat exchange element 21 and the third heat exchange element 23 is also connected as a whole; Example 2, the flat plate 24 of the second heat exchange element 22 and the third heat exchange element 23 is connected as a whole, and the flow channel plate 25 of the second heat exchange element 22 and the third heat exchange element 23 is also connected as a whole; Example 3, the flat plate 24 of the first heat exchange element 21, the second heat exchange element 22 and the third heat exchange element 23 are all connected as a whole, and the flow channel plate 25 of the first heat exchange element 21, the second heat exchange element 22 and the third heat exchange element 23 are also connected as a whole.

[0138] Please refer to Figure 5In some embodiments, a transition portion 28 is provided at the connection position of two adjacent heat exchange elements 2, and a connecting channel 29 is formed in the transition portion 28. The connecting channel 29 connects the cavities 20 of the two adjacent heat exchange elements 2. That is, the connecting channel 29 allows the heat exchange medium in the cavities 20 of the two adjacent heat exchange elements 2 to flow and exchange with each other, so that the heat exchange medium with higher or lower temperature can mix, reducing the local temperature difference, so that the heat exchange of the heat exchange element 2 to the battery cell 10 is more uniform, which is beneficial to reducing the situation where the local temperature difference of the battery cell 10 is too large, and facilitates improving the reliability of the battery device 200.

[0139] Exemplarily, the plurality of heat exchange elements 2 include a first heat exchange element 21, a second heat exchange element 22, and a third heat exchange element 23. The first heat exchange element 21 and the second heat exchange element 22 are respectively arranged on opposite sides of the battery pack 1 in the second direction, and the third heat exchange element 23 is arranged on one side of the battery pack 1 in the third direction. The first direction, the second direction, and the third direction are perpendicular to each other. The connecting position of the flat plates 24 of the two adjacent heat exchange elements 2 has a transition portion 28, which may include: Example 1, the connecting position of the first heat exchange element 21 and the third heat exchange element 23 has a transition portion 28, so that the cavity 20 of the first heat exchange element 21 and the cavity of the third heat exchange element 23 are spaced apart. 20, the heat exchange medium can flow and exchange; Example 2, a transition portion 28 is provided at the connection position of the second heat exchange member 22 and the third heat exchange member 23, so that the heat exchange medium in the cavity 20 of the second heat exchange member 22 and the cavity 20 of the third heat exchange member 23 can flow and exchange; Example 3, a transition portion 28 is provided at the connection position of the first heat exchange member 21 and the third heat exchange member 23, and a transition portion 28 is provided at the connection position of the second heat exchange member 22 and the third heat exchange member 23, so that the heat exchange medium in the cavity 20 of the first heat exchange member 21, the cavity 20 of the second heat exchange member 22 and the cavity 20 of the third heat exchange member 23 can flow and exchange. Among them, the flat plates 24 of two adjacent heat exchange components 2 are connected as one piece, and the flat plates 24 of the two adjacent heat exchange components 2 can be formed as one piece, which is convenient for improving the processing efficiency of the flat plates 24. The flow channel plates 25 of two adjacent heat exchange components 2 are connected as one piece, and the flow channel plates 25 of the two adjacent heat exchange components 2 can be formed as one piece. Since multiple heat exchange components 2 are respectively arranged on different sides of the battery pack 1, the flat plates 24 and flow channel plates 25 of the above-mentioned two adjacent heat exchange components 2 can be fixed as one piece first, and then the flat plates 24 and flow channel plates 25 are bent together, and a certain space is left in the bent area to form a connecting channel 29, so that the processing and manufacturing of the connecting channel 29 is more convenient.

[0140] Of course, in other embodiments of the present application, regardless of whether two adjacent heat exchange elements 2 are connected, the cavities 20 of the two adjacent heat exchange elements 2 can also be separated and arranged, so that the cavities 20 of the two adjacent heat exchange elements 2 are not connected.

[0141] Please refer to Figure 3-Figure 7In some embodiments, the cavities 20 in multiple heat exchange elements 2 are separated or connected, and the cavity 20 of at least one heat exchange element 2 has a first interface 26 and a second interface 27. One of the first interface 26 and the second interface 27 is a medium inlet, and the other is a medium outlet. For example, the cavities 20 of multiple heat exchange elements 2 are connected, and multiple heat exchange elements 2 share the first interface 26 and the second interface 27 to achieve the input and output of the heat exchange medium. For another example, the cavities 20 of multiple heat exchange elements 2 are separated, and each heat exchange element 2 includes a first interface 26 and a second interface 27 to achieve the input and output of the heat exchange medium.

[0142] The first interface 26 and the second interface 27 can be connected to external pipelines. For example, the first interface 26 is a medium inlet and the second interface 27 is a medium outlet. That is, the external pipeline can input heat exchange medium into the cavity 20 through the first interface 26, and the heat exchange medium in the cavity 20 can be output to the external pipeline through the second interface 27. This achieves directional flow of the heat exchange medium, thereby improving the reliability of the battery device 200. Of course, the first interface 26 can also be a medium outlet and the second interface 27 can be a medium inlet.

[0143] The battery device 200 is configured to satisfy at least one of the following conditions A1 to A3:

[0144] In condition A1, the heat exchanger 2 with the first interface 26 extends in the first direction beyond the battery pack 1, and the first interface 26 and the second interface 27 are arranged on the portion of the heat exchanger 2 that extends beyond the battery pack 1. Part of the area of ​​the heat exchanger 2 where the first interface 26 and the second interface 27 are located will not contact the battery pack 1, so that when the first interface 26 and the second interface 27 are connected to the external pipeline, it is not easy to interfere with the battery pack 1, which is convenient for improving the reliability of the battery device 200, and at the same time improves the assembly efficiency of the first interface 26 and the second interface 27 and the external pipeline.

[0145] Exemplarily, the battery device 200 includes two end plates 4, and the two end plates 4 are respectively arranged on both sides of the battery pack 1 in the first direction. The first interface 26 and the second interface 27 are arranged on the part of the heat exchange component 2 that extends beyond the end plate 4, so that the first interface 26 and the second interface 27 are not easy to affect the assembly of the end plate 4, and at the same time it is convenient to improve the assembly efficiency of the first interface 26 and the second interface 27 with the external pipeline.

[0146] It can be understood that the first interface 26 and the second interface 27 can be located on the same side of the heat exchange element 2 in the first direction, or the first interface 26 and the second interface 27 can be located on opposite sides of the heat exchange element 2 in the first direction.

[0147] In condition A2, the cavity 20 includes multiple flow channels 20a connected in parallel between the first port 26 and the second port 27. The multiple flow channels 20a are arranged at intervals, each flow channel 20a extends along the first direction, and each battery cell 10 is opposite to a portion of each flow channel 20a.

[0148] It can be seen that each flow channel 20a can exchange heat with each battery cell 10 of the battery pack 1 at a different position, so that different areas of the multiple battery cells 10 can have a relatively good heat exchange effect, making the overall operating temperature of the battery cell 10 more balanced, which is convenient for improving the reliability of the battery device 200. At the same time, through the multiple flow channels 20a arranged at intervals, the battery cells 10 can have a relatively stable flow at different height positions, and it is not easy for the heat exchange medium to accumulate in the lower part of the flow channel 20a. Moreover, the multiple flow channels 20a arranged at intervals can improve the structural strength of the heat exchange element 2. Compared with the heat exchange element forming a larger cavity, when the battery device 200 is impacted by external force, the area with the cavity on the above-mentioned heat exchange element may have a risk of collapse, affecting the heat exchange effect of the heat exchange element. In the present application, the multiple flow channels 20a are arranged at intervals so that each flow channel 20a of the heat exchange element 2 is supported by a solid structure, which can improve the structural strength of the heat exchange element 2, facilitate improving the impact resistance of the heat exchange element 2, and thereby improve the reliability of the battery device 200.

[0149] In condition A3, each cavity 20 has a medium inlet and a medium outlet, the medium inlets of the plurality of cavities 20 are located on one side of the battery pack 1 in the first direction, and the medium outlets of the plurality of cavities 20 are located on the other side of the battery pack 1 in the first direction.

[0150] It can be seen that the medium inlet and the medium outlet are respectively located on opposite sides of the battery pack 1 in the first direction, then one of the first interface 26 and the second interface 27 is located on one side of the battery pack 1 in the first direction, and the other of the first interface 26 and the second interface 27 is located on the other side of the battery pack 1 in the first direction, so that the flow path of the heat exchange medium is clearer, so as to reduce the possibility of turbulence or eddy current generated by the heat exchange medium in the cavity 20, improve the heat exchange efficiency of the heat exchange component 2, and facilitate more convenient regulation of the temperature of the battery cell 10, thereby improving the reliability of the battery device 200.

[0151] Please refer to Figure 3 、 Figure 4 and Figure 6In some embodiments, the battery device 200 satisfies at least conditions A1 and A3, and the first interface 26 of each heat exchange element 2 is located on the side thereof facing the battery pack 1, that is, the first interface 26 is located between the heat exchange element 2 and the battery pack 1, so as to shorten the spatial spacing between the multiple first interfaces 26, so that the connection points of the first interfaces 26 and the external pipeline can be more concentrated, and at the same time, the external pipeline does not need to bypass the heat exchange element 2 to connect with each first interface 26, so that the structure of the battery device 200 can be more compact, which facilitates the miniaturization design of the battery device 200; and / or, the second interface 27 of each heat exchange element 2 is located on the side thereof facing the battery pack 1, that is, the second interface 27 is located between the heat exchange element 2 and the battery pack 1, so as to shorten the spatial spacing between the multiple second interfaces 27, so that the connection points of the second interface 27 and the external pipeline can be more concentrated, and at the same time, the external pipeline does not need to bypass the heat exchange element 2 to connect with each second interface 27, so that the structure of the battery device 200 can be more compact, which facilitates the miniaturization design of the battery device 200.

[0152] It can be seen that the first interface 26 of each heat exchanger 2 and the second interface 27 of each heat exchanger 2 can be located on the side facing the battery pack 1, so that an external pipeline can be connected to multiple first interfaces 26 at the same time, and an external pipeline can be connected to multiple second interfaces 27 at the same time, so that the structure of the battery device 200 is more compact, which facilitates the miniaturization design of the battery device 200.

[0153] In a second aspect, an embodiment of the present application provides an electric device 300 , comprising the battery device 200 of the first aspect.

[0154] In the above technical solution, since the battery device 200 has good reliability, the use of the battery device 200 can improve the reliability of the power-consuming device 300.

[0155] A specific embodiment of the battery device 200 of the present application is described below.

[0156] Example 1, please refer to Figure 3-Figure 6 The battery device 200 includes: a battery pack 1, three heat exchange components 2, two heat conductive reinforcement components 3, two end plates 4, a first load beam and a second load beam.

[0157] The battery pack 1 includes a plurality of battery cells 10 sequentially arranged along a first direction. Each battery cell 10 has a first wall 11 . The first wall 11 is the wall with the largest area in the battery cell 10 and is perpendicular to the first direction.

[0158] The three heat exchange members 2 include a first heat exchange member 21, a second heat exchange member 22 and a third heat exchange member 23. Each heat exchange member 2 extends along the first direction and each heat exchange member 2 is thermally coordinated with multiple battery cells 10 of the battery pack 1. Each heat exchange member 2 has a cavity 20 for accommodating a heat exchange medium to adjust the temperature of the battery cell 10. The first heat exchange member 21 and the second heat exchange member 22 are respectively arranged on opposite sides of the battery pack 1 in the second direction, and the third heat exchange member 23 is arranged on one side of the battery pack 1 in the third direction. The first direction, the second direction and the third direction are perpendicular to each other. The distance between each of the first heat exchange member 21 and the second heat exchange member 22 and the end of the battery cell 10 in the third direction without the pole 13 is less than the distance between the first heat exchange member 21 and the second heat exchange member 22. The distance between each of the second heat exchange elements 22 and the end of the battery cell 10 provided with the pole 13 in the third direction is such that the first heat exchange element 21, the second heat exchange element 22 and the third heat exchange element 23 are integrally connected, and the heat conductive reinforcement element 3 corresponding to at least one of the first heat exchange element 21 and the second heat exchange element 22 is spaced apart from the end of the battery cell 10 corresponding to the third heat exchange element 23 in the third direction. A transition portion 28 is provided at the connection position of the first heat exchange element 21 and the third heat exchange element 23, and a transition portion 28 is also provided at the connection position of the second heat exchange element 22 and the third heat exchange element 23. A connecting channel 29 is formed in the transition portion 28, and the connecting channel 29 connects the cavities 20 of the first heat exchange element 21, the second heat exchange element 22 and the third heat exchange element 23.

[0159] The first heat exchanger 21, the second heat exchanger 22 and the third heat exchanger 23 all include a flat plate 24 and a flow channel plate 25 stacked along the thickness direction thereof. The flow channel plate 25 has a flat portion 25a and a protruding portion 25b. The flat portion 25a is fixed to the flat plate 24. The protruding portion 25b is protruded relative to the flat portion 25a in a direction away from the flat plate 24 and is spaced from the flat plate 24 so that a cavity 20 is defined between the flow channel plate 25 and the flat plate 24. The cavity 20 includes a plurality of parallel-connected first and second heat exchangers. The flow channel 20a between the interface 26 and the second interface 27, each flow channel 20a extends along the first direction, and each battery cell 10 is respectively opposite to a portion of each flow channel 20a, the flat plate 24 is provided between the battery pack 1 and the flow channel plate 25, the first heat exchange element 21, the second heat exchange element 22 and the third heat exchange element 23 are integrally connected to the flat plate 24, the first heat exchange element 21, the second heat exchange element 22 and the third heat exchange element 23 are also integrally connected to the flow channel plate 25, the first heat exchange element 21, the second heat exchange element 22 and the third heat exchange element 23 are also integrally connected to the flow channel plate 25, the first heat exchange element 21, the second heat exchange element The cavities 20 in the first heat exchange member 22 and the third heat exchange member 23 are all separated and arranged. The cavities 20 of the first heat exchange member 21, the second heat exchange member 22 and the third heat exchange member 23 have a first interface 26 and a second interface 27. One of the first interface 26 and the second interface 27 is a medium inlet and the other is a medium outlet. The first heat exchange member 21, the second heat exchange member 22 and the third heat exchange member 23 with the first interface 26 extend beyond the battery pack 1 in the first direction. The first interface 26 and the second interface 27 are provided on the part of the heat exchange member 2 that exceeds the battery pack 1. The medium inlets of the multiple cavities 20 are all located on one side of the battery pack 1 in the first direction, and the medium outlets of the multiple cavities 20 are located on the other side of the battery pack 1 in the first direction. The first interface 26 of the first heat exchange member 21, the second heat exchange member 22 and the third heat exchange member 23 are located on the side thereof facing the battery pack 1, and the second interface 27 of the first heat exchange member 21, the second heat exchange member 22 and the third heat exchange member 23 are located on the side thereof facing the battery pack 1.

[0160] There are two thermally conductive reinforcement members 3, each comprising a first thermally conductive reinforcement member 34 and a second thermally conductive reinforcement member 35. The first thermally conductive reinforcement member 34 is disposed between the first heat exchange member 21 and the battery pack 1, with the first heat exchange member 21 secured to the battery pack 1 and thermally coordinated therewith via the first thermally conductive reinforcement member 34. The second thermally conductive reinforcement member 35 is disposed between the second heat exchange member 22 and the battery pack 1, with the second heat exchange member 22 secured to the battery pack 1 and thermally coordinated therewith via the second thermally conductive reinforcement member 35. Each of the first thermally conductive reinforcement member 34 and the second thermally conductive reinforcement member 35 has a mounting portion that is secured to the support beam of the battery device 200. For example, the third heat exchange member 23 is adhesively secured to the battery pack 1, the first heat exchange member 21 is adhesively secured to the first thermally conductive reinforcement member 34, and the second heat exchange member 22 is adhesively secured to the second thermally conductive reinforcement member 35.

[0161] The first load beam and the second load beam are respectively arranged on opposite sides of the battery pack 1 in the second direction. The first load beam is fixed to the mounting portion of the first thermal reinforcement 34 , and the second load beam is fixed to the mounting portion of the second thermal reinforcement 35 .

[0162] Both the first thermal conductive reinforcement 34 and the second thermal conductive reinforcement 35 include a side plate 31 and a pull plate 32. The side plate 31 of the first thermal conductive reinforcement 34 is arranged between the corresponding first heat exchange member 21 and the battery pack 1, and the side plate 31 of the second thermal conductive reinforcement 35 is arranged between the corresponding second heat exchange member 22 and the battery pack 1. The side plate 31 includes a first plate portion 31a and a second plate portion 31b that are integrally connected. The first plate portion 31a and the second plate portion 31b are respectively located on both sides of the pull plate 32 in the third direction. The pull plate 32 is connected at the connection position of the first plate portion 31a and the second plate portion 31b. The pull plate 32 extends from the side plate 31 in the second direction toward a direction away from the battery pack 1. The pull plate 32 is avoided from the corresponding heat exchange member 2 so that the corresponding heat exchange member 2 is located on one side of the pull plate 32, and the mounting portion is formed on the pull plate 32.

[0163] The battery cell 10 includes a shell 12, and the two ends of the shell 12 in the third direction are respectively a first end 12a and a second end 12b. The distance between the first heat exchange element 21 and the second heat exchange element 22 and the first end 12a is smaller than the distance between the first heat exchange element 21 and the second heat exchange element 22 and the second end 12b. The side plate 31 extends beyond the second end 12b. The poles 13 of the multiple battery cells 10 of the battery pack 1 are all located on the side of the battery cell 10 away from the third heat exchange element 23.

[0164] There are two end plates 4 , which are respectively arranged on both sides of the battery pack 1 in the first direction. Each end plate 4 is fixed to a corresponding battery cell 10 , and each end plate 4 is respectively fixed to the first thermal reinforcement 34 and the second thermal reinforcement 35 .

[0165] Example 2

[0166] Please refer to Figure 7 The structure of the battery device 200 provided in the second embodiment is substantially the same as that of the battery device 200 in the first embodiment, except that: each of the first heat-conducting reinforcement member 34 and the second heat-conducting reinforcement member 35 has a supporting portion 33, and the supporting portion 33 abuts against one end of the battery pack 1 in the third direction; the first heat exchange member 21, the second heat exchange member 22, and the third heat exchange member 23 are all spaced apart; the third heat exchange member 23 is disposed between the two supporting portions 33; and the flat plate 24 and the flow channel plate 25 of each heat exchange member 2 are spaced apart from the flat plate 24 and the flow channel plate 25 of the other heat exchange members 2.

[0167] It can be seen that in the above-mentioned embodiment 1 and embodiment 2, the battery device 200 includes multiple heat exchange elements 2, and the multiple heat exchange elements 2 are arranged on different sides of the battery pack 1, so that different sides of the battery pack 1 can exchange heat with the heat exchange elements 2, so as to increase the heat exchange area of ​​the battery pack 1. At the same time, the battery pack 1 includes multiple battery cells 10 arranged in sequence along the first direction, and each heat exchange element 2 also extends along the first direction, so that the heat exchange element 2 can cooperate with each battery cell 10 in the multiple battery cells 10 in a heat-conducting manner, so as to further increase the heat exchange area of ​​the battery pack 1, which is conducive to better regulating the temperature of the battery cells 10 and improving the reliability of the battery device 200. A first thermally conductive reinforcement member 34 is provided between the first heat exchange member 21 and the battery pack 1. The first thermally conductive reinforcement member 34 is fixed to and thermally cooperates with the multiple battery cells 10 of the battery pack 1. A second thermally conductive reinforcement member 35 is provided between the second heat exchange member 22 and the battery pack 1. The second thermally conductive reinforcement member 35 is fixed to and thermally cooperates with the multiple battery cells 10 of the battery pack 1, so that the first thermally conductive reinforcement member 34 and the second thermally conductive reinforcement member 35 are not likely to affect the heat exchange between the heat exchange member 2 and the battery cells 10. At the same time, the first thermally conductive reinforcement member 34 and the second thermally conductive reinforcement member 35 can also enhance the structural strength of the battery device 200, which can further improve the reliability of the battery device 200.

[0168] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The above are only preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, unless otherwise specified, all embodiments and optional embodiments of this application can be combined with each other to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form new technical solutions. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A battery device, characterized in that: include: A battery pack, the battery pack comprising a plurality of battery cells arranged sequentially along a first direction; a plurality of heat exchange members, each of which is disposed on different sides of the battery pack, each extending along the first direction and thermally cooperating with the plurality of battery cells of the battery pack, each heat exchange member having a cavity therein for accommodating a heat exchange medium for regulating the temperature of the battery cells; A thermally conductive reinforcement member is fixed and thermally coordinated with the multiple battery cells of the battery pack. The thermally conductive reinforcement member is provided between at least one of the multiple heat exchange members and the battery pack, so that at least one of the multiple heat exchange members is fixed and thermally coordinated with the battery pack through the thermally conductive reinforcement member.

2. The battery device according to claim 1, wherein: The plurality of heat exchange elements include a first heat exchange element and a second heat exchange element, wherein the first heat exchange element and the second heat exchange element are respectively arranged on opposite sides of the battery pack in a second direction, and the second direction is perpendicular to the first direction; and / or, The multiple heat exchange elements include a first heat exchange element and a third heat exchange element. The first heat exchange element is arranged on one side of the battery pack in the second direction, and the third heat exchange element is arranged on one side of the battery pack in the third direction. The first direction, the second direction and the third direction are perpendicular to each other.

3. The battery device according to claim 2, characterized in that The multiple heat exchange members include a first heat exchange member and a second heat exchange member, and the multiple heat conductive reinforcement members include a first heat conductive reinforcement member and a second heat conductive reinforcement member. The first heat conductive reinforcement member is arranged between the first heat exchange member and the battery pack, and the second heat conductive reinforcement member is arranged between the second heat exchange member and the battery pack.

4. The battery device according to claim 3, characterized in that Each of the first heat-conducting reinforcement member and the second heat-conducting reinforcement member has a mounting portion, and the mounting portion is fixedly matched with the load beam of the battery device.

5. The battery device according to claim 4, characterized in that Each of the battery cells has a first wall, the first wall being the wall with the largest area in the battery cell, and the first wall being perpendicular to the first direction, or the first wall being perpendicular to the second direction. The poles of the plurality of battery cells of the battery pack are all located at one end of the battery cell in the third direction, the distance between each of the first heat exchange element and the other end of the battery cell in the third direction is shorter than the distance between each of the first heat exchange element and the second heat exchange element and the one end of the battery cell in the third direction, and in the third direction, the height of each of the first heat exchange element and the second heat exchange element is less than or equal to 60% of the height of the battery cell and greater than or equal to 30% of the height of the battery cell, and the first direction and the second direction are respectively perpendicular to the third direction; and / or, The first heat exchange member and the second heat exchange member are both arranged adjacent to one end of the battery cell in the third direction, and the distance between the one end of the battery cell in the third direction and the mounting portion in the third direction is less than or equal to 80% of the height of the battery cell and greater than or equal to 50% of the height of the battery cell.

6. The battery device according to claim 4, characterized in that At least one of the first thermally conductive reinforcement member and the second thermally conductive reinforcement member includes a side plate and a pull plate, the side plate is arranged between the corresponding heat exchange member and the battery pack, the pull plate is bent and connected to the side plate and extends from the side plate in the second direction toward a direction away from the battery pack, the corresponding heat exchange member is located on the side of the pull plate in the third direction, the mounting portion is formed on the pull plate, and the first direction and the second direction are respectively perpendicular to the third direction.

7. The battery device according to claim 6, characterized in that The side plate includes a first plate portion and a second plate portion that are integrally connected. The first plate portion and the second plate portion are respectively located on both sides of the pull plate in the third direction. The pull plate is connected at a connection position between the first plate portion and the second plate portion.

8. The battery device according to claim 7, characterized in that The battery cell includes a shell, and the two ends of the shell in the third direction are respectively a first end and a second end. In the third direction, the distance between the heat exchange element corresponding to the side plate and the first end is smaller than the distance between the heat exchange element and the second end, and the side plate extends to be flush with the second end or beyond the second end.

9. The battery device according to claim 4, characterized in that Each of the first heat-conducting reinforcement member and the second heat-conducting reinforcement member has a supporting portion, and the supporting portion abuts against one end of the battery pack in a third direction. The first direction, the second direction and the third direction are perpendicular to each other.

10. The battery device according to claim 9, characterized in that The plurality of heat exchange elements further include a third heat exchange element, which is disposed on the same side of the battery pack as the supporting portion. The third heat exchange element is disposed between the two supporting portions and is spaced apart from the first heat exchange element and the second heat exchange element.

11. The battery device according to claim 10, characterized in that In the second direction, the width of the third heat exchange element is less than or equal to 85% of the width of the battery cell and greater than or equal to 60% of the width of the battery cell.

12. The battery device according to claim 4, wherein: The battery device further comprises: End plates, there are two end plates and they are respectively arranged on both sides of the battery pack in the first direction, and each end plate is fixed to the first thermally conductive reinforcement member and the second thermally conductive reinforcement member respectively.

13. The battery device according to claim 4, characterized in that On a preset plane, the orthographic projection area of ​​the cavity of each of the first heat exchange member and the second heat exchange member is less than or equal to 80% of the orthographic projection area of ​​the first thermal conductive reinforcement member or the second thermal conductive reinforcement member, and greater than or equal to 50% of the orthographic projection area of ​​the first thermal conductive reinforcement member or the second thermal conductive reinforcement member, and the preset plane is perpendicular to the second direction.

14. The battery device according to claim 4, characterized in that The battery device also includes a first load-bearing beam and a second load-bearing beam, wherein the first load-bearing beam and the second load-bearing beam are respectively arranged on opposite sides of the battery pack in the second direction, the first load-bearing beam is fixed to the mounting portion of the first thermally conductive reinforcement member, and the second load-bearing beam is fixed to the mounting portion of the second thermally conductive reinforcement member.

15. The battery device according to claim 14, characterized in that At least one of the first load beam and the second load beam is fixed to the mounting portion by a threaded fastener; and / or, At least one of the first load-bearing beam and the second load-bearing beam includes a first beam body and a second beam body that are fixedly connected, and the first beam body and the second beam body are clamped on opposite sides of the mounting portion in a third direction, and the first direction and the second direction are respectively perpendicular to the third direction.

16. The battery device according to claim 2, characterized in that The plurality of heat exchange elements include a first heat exchange element, a second heat exchange element and a third heat exchange element, At least one of the first heat exchange member and the second heat exchange member is integrally connected to the third heat exchange member, and the heat conductive reinforcement member corresponding to the at least one of the first heat exchange member and the second heat exchange member is spaced apart from one end of the battery cell corresponding to the third heat exchange member in the third direction.

17. The battery device according to claim 2, wherein: The plurality of heat exchange elements include a first heat exchange element, a second heat exchange element and a third heat exchange element. The poles of the plurality of battery cells of the battery pack are all located on a side of the battery cell away from the third heat exchange element.

18. The battery device according to claim 1, wherein: At least two adjacent ones of the plurality of heat exchange elements are integrally connected; and / or, Two adjacent heat exchange components are arranged at intervals.

19. The battery device according to claim 1, wherein: At least one of the heat exchange elements includes a flat plate and a flow channel plate stacked along its thickness direction, the flow channel plate having a flat portion and a protruding portion, the flat portion being fixed to the flat plate, the protruding portion being protruded relative to the flat portion in a direction away from the flat plate and spaced apart from the flat plate, so that the cavity is defined between the flow channel plate and the flat plate, and the flat plate is disposed between the battery pack and the flow channel plate. The flat plates of two adjacent heat exchange elements are connected as one body, and the flow channel plates of two adjacent heat exchange elements are connected as one body.

20. The battery device according to claim 19, wherein: A transition portion is provided at a connection position between two adjacent heat exchange elements. A communication channel is formed in the transition portion. The communication channel communicates with the cavities of the two adjacent heat exchange elements.

21. The battery device according to any one of claims 1 to 20, characterized in that: The cavities in the plurality of heat exchange elements are separated or connected, and at least one cavity of the heat exchange element has a first interface and a second interface, one of the first interface and the second interface is a medium inlet, and the other is a medium outlet. The battery device is configured to satisfy at least one of the following conditions: Condition A1: The heat exchange member having the first interface extends beyond the battery pack in the first direction, and the first interface and the second interface are provided on the portion of the heat exchange member that extends beyond the battery pack; Condition A2: The cavity includes a plurality of flow channels connected in parallel between the first interface and the second interface, each of the flow channels extends along the first direction, and each of the battery cells is opposite to a portion of each of the flow channels; Condition A3: Each of the cavities has the medium inlet and the medium outlet, the medium inlets of the plurality of cavities are located on one side of the battery pack in the first direction, and the medium outlets of the plurality of cavities are located on the other side of the battery pack in the first direction.

22. The battery device according to claim 21, characterized in that The battery device at least meets conditions A1 and A3, The first interface of each heat exchange element is located on a side thereof facing the battery pack; and / or, The second interface of each heat exchange element is located on a side thereof facing the battery pack.

23. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1-22.

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