Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device comprises a box body, a battery monomer and a heat exchange assembly, the box body is provided with an accommodating space; the battery monomers are arranged in the accommodating space; the heat exchange assembly is arranged opposite to the battery monomers, the heat exchange assembly comprises a first heat exchange part and a second heat exchange part, the first heat exchange part and the second heat exchange part are both in heat conduction connection with the battery monomers, the first heat exchange part is provided with a fluid channel for introducing fluid, the first heat exchange part is provided with a mounting groove, and the fluid channel is communicated with the mounting groove; one side of the second heat exchange piece is contained in the installation groove, and the other side of the second heat exchange piece extends towards the fluid channel. Thus, in the extension direction of the mounting groove, the occupied space of the second heat exchange part coincides with the occupied space of the first heat exchange part, so that the overall structure of the battery device is more compact, the space utilization rate of the battery device is improved, and the energy density of the battery device under the same volume is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device and an electric device. Background Art

[0002] In the design and application of battery devices, the temperature control of battery cells is crucial to ensure battery performance, extend the life of battery cells, and ensure safety in use. In related technologies, heat exchange components are added to the box of the battery device to achieve heat dissipation and heating of the battery device. However, the heat exchange component occupies a large space in the battery device, which makes the space utilization of the battery device low, thereby making the energy density of the battery device lower under the same volume. Utility Model Content

[0003] In view of the above problems, the embodiments of the present invention provide a battery device and an electrical device, which can solve the problem that the space utilization rate in the battery device is low, thereby making the energy density of the battery device low under the same volume.

[0004] The present utility model provides a battery device, which includes a box, a battery cell and a heat exchange assembly. The box has a housing space; the battery cell is arranged in the housing space; the heat exchange assembly is arranged opposite to the battery cell, and the heat exchange assembly includes a first heat exchange member and a second heat exchange member, the first heat exchange member and the second heat exchange member are both thermally connected to the battery cell, the first heat exchange member has a fluid channel for passing fluid, the first heat exchange member is provided with a mounting groove, the fluid channel is connected to the mounting groove, one side of the second heat exchange member is accommodated in the mounting groove, and the other side of the second heat exchange member extends toward the fluid channel.

[0005] In the battery device of the embodiment of the utility model, one side of the second heat exchange element is accommodated in the mounting groove, and the other side of the second heat exchange element extends toward the fluid channel, which reduces the space occupied by the second heat exchange element inside the box. In the extension direction of the mounting groove, the space occupied by the second heat exchange element overlaps with the space occupied by the first heat exchange element, making the overall structure of the battery device more compact, thereby improving the space utilization of the battery device, and thus improving the energy density of the battery device under the same volume.

[0006] In addition, the first heat exchange component has a fluid channel, so the heat exchange efficiency between the first heat exchange component and the battery cell can be improved by introducing fluid. Moreover, since the second heat exchange component is accommodated in the mounting groove, the fluid in the fluid channel can also improve the heat exchange efficiency between the second heat exchange component and the battery cell. This double superposition heat exchange mechanism is conducive to improving the heat exchange efficiency between the heat exchange component and the battery cell, thereby improving the heat dissipation and heating effect of the battery device.

[0007] In some embodiments, the first heat exchange element includes a first plate and a second plate, the first plate is located between the battery cell and the second plate, the second plate includes a plate body and a guide groove recessed in the plate body away from the first plate, and the first plate is attached to the plate body and covers the guide groove to form the fluid channel.

[0008] Thus, the plate-type structural design of the first heat exchange element simplifies the manufacturing process of the fluid channel, because the processing and assembly of the plate are relatively simple and the cost is low. Moreover, unlike the method of setting multiple independent pipes in the accommodating space, the fluid channel formed in this way occupies less space, thereby further reducing the space occupied by the heat exchange component inside the box, thereby improving the space utilization of the battery device, thereby improving the energy density of the battery device under the same volume.

[0009] In some embodiments, the first plate is provided with the mounting groove, and the mounting groove passes through the first plate and is connected with the guide groove.

[0010] Thus, the through installation slot design simplifies the installation process of the second heat exchange element. Since the installation slot is directly connected to the guide slot, the second heat exchange element can be more easily positioned and fixed, which not only improves the assembly efficiency, but also reduces the error rate during the assembly process.

[0011] In certain embodiments, the surfaces of the second heat exchange element and the first plate facing the battery cell are defined as inner surfaces, and the inner surface of the second heat exchange element is flush with the inner surface of the first plate.

[0012] In this way, the second heat exchange element is ensured to be flush with the inner surface of the first plate, which can effectively improve the heat exchange performance of the second heat exchange element without occupying additional space inside the battery device, thereby improving the heat exchange efficiency of the battery device.

[0013] In some embodiments, the second heat exchange element is embedded in the mounting groove.

[0014] Thus, this embedded design improves the structural stability of the heat exchange assembly. The close fit between the second heat exchange element and the first heat exchange element reduces vibration and displacement, ensuring reliability in long-term operation. In addition, by installing in an embedded manner, it is possible to eliminate the need for fasteners such as screws and bolts, thereby reducing manufacturing costs and improving assembly efficiency.

[0015] In some embodiments, the number of the battery cells is plural, and the battery cell assemblies are arranged in multiple rows in the accommodating space, and the guide grooves extend in a zigzag shape and are arranged corresponding to the multiple rows of battery cell assemblies.

[0016] Thus, the zigzag extension design of the flow guide groove enables the fluid channel to be set corresponding to multiple rows of battery cell assemblies, so that the heat can be distributed more evenly, ensuring that each row of battery cells can obtain effective heat exchange, thereby improving the heat exchange efficiency of the entire battery device. In addition, through the zigzag extension of the flow guide groove design, the flow path of the fluid in the first heat exchange element is extended, increasing the contact time and area of ​​the fluid with the first heat exchange element, thereby improving the heat exchange effect of the first heat exchange element.

[0017] In some embodiments, the guide groove has a first end and a second end, the first end is provided with a water inlet joint, and the second end is provided with a water outlet joint.

[0018] In this way, the fluid can flow into the guide groove from the water inlet joint and out of the guide groove from the water outlet joint. This realizes the inflow and outflow of the fluid to improve the effect of heat exchange using the fluid, and avoids the failure of the thermal management function due to the inability to replace the fluid causing the temperature of the fluid to be close to that of the battery cell.

[0019] In certain embodiments, the water inlet connector and the water outlet connector are both disposed on the same side of the multiple rows of battery cell assemblies.

[0020] In this way, setting the water inlet and outlet joints on the same side helps to reduce the intersection of fluid pipelines inside the battery device and reduce the overall space occupied by the water inlet and outlet joints in the box, thereby improving the space utilization inside the battery device and improving the energy density of the battery device under the same volume. In addition, the centralized water inlet and outlet joints reduce the number of pipe connection points, simplify the installation process, and also reduce the difficulty and cost of maintenance. Maintenance personnel can more easily access the joints for necessary inspection and replacement.

[0021] In some embodiments, the accommodating space includes a first compartment and a second compartment, the first compartment and the second compartment are separated by a crossbeam, the battery cell is arranged in the first compartment, the water outlet joint and the water inlet joint are both passed through the first plate, and the water outlet joint and the water inlet joint are both arranged in the second compartment and are spaced apart from the crossbeam.

[0022] In this way, since the water outlet joint and the water inlet joint do not need to be set up with a pipe passing through the crossbeam, the setting of the water outlet joint and the water inlet joint will not affect the structural strength of the crossbeam, thereby ensuring the overall joint strength of the battery device. In addition, the water inlet and water outlet joints are centrally set in the second compartment, which is convenient for maintenance and repair of the fluid pipeline system. Maintenance personnel can more easily access the joints without disassembling the battery cells, which simplifies the maintenance process.

[0023] In some embodiments, there are multiple second heat exchange elements, and each of the multiple second heat exchange elements is arranged corresponding to the extension path of the guide groove.

[0024] In this way, the plurality of second heat exchange elements are arranged corresponding to the extension path of the guide groove. This design allows the fluid to contact each second heat exchange element more evenly when flowing through the guide groove, thereby improving the heat exchange efficiency.

[0025] In some embodiments, the number of the second heat exchange elements corresponds one-to-one to the number of the battery cells.

[0026] In this way, the number of second heat exchange elements corresponds to the number of battery cells, and this design can achieve accurate temperature control of each battery cell. Each battery cell area is provided with a corresponding second heat exchange element to ensure uniformity and efficiency of heat exchange.

[0027] In certain embodiments, the battery device further includes a heat conductive member supported between the heat exchange assembly and two adjacent side surfaces of the battery cell.

[0028] In this way, the heat conductive member is supported between two adjacent side surfaces of the heat exchange assembly and the battery cell, and can effectively and evenly transfer the heat of the battery cell and the heat exchange assembly, thereby improving the heat exchange efficiency and the consistency of the heat exchange.

[0029] In some embodiments, the second heat exchange element can produce a Peltier effect, and the second heat exchange element includes a first part and a second part stacked with the first part, the first part is connected to the heat conductive element, and the second part is arranged close to the fluid channel and used to contact the fluid.

[0030] In this way, the second heat exchange element can produce the Peltier effect, which allows heat transfer through the control of current, thereby providing efficient heat exchange capabilities. The use of the Peltier effect can significantly improve the heating or cooling efficiency of the battery device and reduce the energy consumption of the process. In addition, the Peltier effect is reversible, that is, the direction of heat flow can be changed by changing the direction of the current. This means that the second heat exchange element can be heated or cooled as needed, providing two-way temperature control.

[0031] In some embodiments, the box body includes a surrounding wall, the surrounding wall is provided with an opening, and the first plate covers the opening.

[0032] In this way, the first plate can not only be used as a component to achieve heat exchange of battery cells, but also provide a wall function of the box to enhance the sealing of the box. This reduces the manufacturing cost of the box, and because there is no need to set up an additional wall to cover the opening, the provision of the first heat exchange component does not increase the space occupied by the box, thereby improving the space utilization rate inside the battery device, thereby increasing the energy density of the battery device under the same volume.

[0033] An embodiment of the utility model provides an electric device, wherein the electric device comprises a battery device according to any one of the above embodiments, and the battery device is used to provide electric energy.

[0034] Since the electrical device includes the above-mentioned battery device, it at least includes all the beneficial effects of the above-mentioned battery device, which will not be repeated here.

[0035] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Various other advantages and benefits will become apparent to those skilled in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only used for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. In addition, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0037] Figure 1 It is a schematic diagram of the structure of an electric device provided by some embodiments of the utility model;

[0038] Figure 2 It is a partial structural schematic diagram of a battery device provided in some embodiments of the utility model;

[0039] Figure 3 yes Figure 2 Explosion diagram of a battery device;

[0040] Figure 4 yes Figure 2 A schematic diagram of a battery device from another perspective;

[0041] Figure 5 yes Figure 4 A cross-sectional view of a battery device in the AA direction;

[0042] Figure 6 yes Figure 5 A magnified view of part a;

[0043] Figure 7 It is a schematic diagram of the assembly structure of the first heat exchange element and the second heat exchange element provided in some embodiments of the utility model.

[0044] Description of Figure Numbers:

[0045] Battery device 100; box body 10; accommodating space 11; battery cell 20; heat exchange assembly 30; first heat exchange element 31; second heat exchange element 32; fluid channel 310; mounting groove 311; first plate 312; second plate 313; plate body 3130; guide groove 314; inner surface 320 of second heat exchange element; inner surface 3120 of first plate; battery cell assembly 40; first end 3140; second end 3141; water inlet connector 50; water outlet connector 60; first compartment 12; second compartment 13; crossbeam 14; surrounding wall 15; opening 150; heat conductive element 70; first part 321; second part 322; electrical device 1000; controller 200; motor 300. DETAILED DESCRIPTION

[0046] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by technicians in the technical field to which the present invention belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" in the specification and claims of the present invention and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0048] In the description of the embodiments of the present utility model, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present utility model, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0049] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0050] In the description of the embodiments of the present utility model, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0051] In the description of the embodiments of the present invention, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0052] In the description of the embodiments of the present invention, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0053] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0054] At present, judging from the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of battery application fields, its market demand is also constantly expanding.

[0055] In the design and application of battery devices, the temperature control of battery cells is crucial to ensure battery performance, extend battery life, and ensure safety in use. In order to effectively cool the battery cells inside the battery device, it is usually necessary to integrate a heat exchange component to perform thermal management on multiple battery cells. For example, by connecting the heat exchange component to the outer surfaces of multiple battery cells, heat exchange can be performed between the battery cells and the thermal management components.

[0056] In the case of a large number of battery cells, in order to effectively perform heat exchange on the multiple battery cells, the heat exchange assembly usually has multiple pipes through which fluids pass, and these pipes are arranged between the multiple battery cells.

[0057] However, these pipes tend to occupy a large space in the battery device, which makes the space utilization of the battery device low, thereby making the energy density of the battery device lower under the same volume.

[0058] Based on the above considerations, an embodiment of the utility model provides a battery device. In the battery device, the heat exchange component includes a first heat exchange component and a second heat exchange component, both of which are thermally connected to the battery cell, the first heat exchange component has a fluid channel for passing fluid, the first heat exchange component is provided with a mounting groove, the fluid channel is connected to the mounting groove, one side of the second heat exchange component is accommodated in the mounting groove, and the other side of the second heat exchange component extends toward the fluid channel. This reduces the space occupied by the second heat exchange component inside the box. In the extension direction of the mounting groove, the space occupied by the second heat exchange component overlaps with that of the first heat exchange component, making the overall structure of the battery device more compact, thereby improving the space utilization of the battery device, thereby improving the energy density of the battery device under the same volume.

[0059] Please refer to Figure 1 , Figure 1 1 is a schematic diagram of the structure of the power-consuming device 1000 provided by some embodiments of the utility model. The technical solutions described in the embodiments of the utility model are applicable to various power-consuming devices 1000 using the battery device 100, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes airplanes, rockets, space shuttles and spacecrafts, etc.

[0060] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electric device 1000 according to an implementation mode of the utility model.

[0061] The battery device 100 is disposed inside the vehicle, and the battery device 100 can be disposed at the bottom, head, or tail of the vehicle. The battery device 100 can be used to power the vehicle, for example, the battery device 100 can be used as an operating power source for the vehicle.

[0062] The vehicle may further include a controller 200 and a motor 300 , wherein the controller 200 is used to control the battery device 100 to supply power to the motor 300 , for example, to meet the power requirements of starting, navigating, and driving the vehicle.

[0063] In the embodiment of the utility model, the battery device 100 can not only be used as the operating power source of the vehicle, but also can be used as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0064] Please refer to Figure 2 , Figure 2 It is a partial structural schematic diagram of a battery device provided in some embodiments of the present invention. The battery device 100 (Battery Apparatus) mentioned in the embodiments of the present invention may include one or more battery cell assemblies 40 for providing voltage and capacity. The battery cell assembly 40 (Battery Cell Assembly) may include a plurality of battery cells 20, and the plurality of battery cells 20 are connected in series, in parallel or in mixed connection through a busbar component.

[0065] In the embodiment of the present invention, the battery cell 20 may be a secondary battery. A secondary battery refers to a battery cell 20 that can be continuously used by activating active materials by charging after the battery cell 20 is discharged.

[0066] The battery cell 20 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiment of the utility model.

[0067] In some embodiments, a battery cell assembly 40 (Battery Cell Assembly) is generally formed by arranging a plurality of battery cells 20 .

[0068] As an example, the battery cell assembly 40 may be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells 20 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 20 by a cable tie.

[0069] In some embodiments, the battery device 100 may be a battery pack, which includes a case 10 and one or more battery cell assemblies 40 . The battery cell assemblies 40 are accommodated in the case 10 .

[0070] As an example, the battery cell assembly 40 may be a battery module, and the battery cell assembly 40 may be accommodated in the case 10 by fixing the battery module in the case 10 .

[0071] As an example, the battery cell assembly 40 may also be accommodated in the case 10 by directly fixing the plurality of battery cells 20 to the case 10 .

[0072] In some embodiments, the box 10 can be used as a part of the chassis structure of the vehicle. For example, part of the box 10 can become at least a part of the floor of the vehicle, or part of the box 10 can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0073] In some embodiments, the battery device 100 may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0074] Please refer to Figures 2 to 6 . Figure 3 yes Figure 2 An exploded schematic diagram of a battery device 100; Figure 4 yes Figure 2 A schematic diagram of the battery device 100 from another perspective; Figure 5 yes Figure 4 A cross-sectional view of the battery device 100 along the AA direction; Figure 6 yes Figure 5 An enlarged view of part a of the present utility model. An embodiment of the present utility model provides a battery device 100, which includes a housing 10, a battery cell 20 and a heat exchange assembly 30. The housing 10 has a containing space 11; the battery cell 20 is arranged in the containing space 11; the heat exchange assembly 30 is arranged opposite to the battery cell 20, and the heat exchange assembly 30 includes a first heat exchange component 31 and a second heat exchange component 32, both of which are thermally connected to the battery cell 20, and the first heat exchange component 31 and the second heat exchange component 32 are thermally connected to the battery cell 20, and the first heat exchange component 31 has a fluid channel 310 for passing fluid, and the first heat exchange component 31 is provided with a mounting groove 311, and the fluid channel 310 is connected to the mounting groove 311, and one side of the second heat exchange component 32 is accommodated in the mounting groove 311, and the other side of the second heat exchange component 32 extends toward the fluid channel 310.

[0075] Specifically, the accommodation space 11 refers to the space inside the box body 10, which can be used to place the battery cell 20 and the heat exchange assembly 30. The size of the accommodation space 11 should be adapted to the size of the battery cell 20 and the heat exchange assembly 30.

[0076] The heat exchange assembly 30 is used to transfer heat to and from the battery cells 20. The heat exchange assembly 30 may be in direct contact with the battery cells 20. The heat exchange assembly 30 may also be in indirect contact with the battery cells 20. The heat exchange assembly 30 may dissipate heat from the battery cells 20, or heat the battery cells 20, for example, by transferring heat generated by the battery cells 20 to a fluid to achieve cooling, or by transferring heat to heat the battery cells 20 when necessary.

[0077] The first heat exchange component 31 and the second heat exchange component 32 can be in direct contact with the battery cell 20, or can be in indirect contact with the battery cell 20 to achieve thermal connection. Thermal connection means that the first heat exchange component 30 or the second heat exchange component 30 can transfer heat with the battery cell 20, so that the temperature of the battery cell 20 increases or decreases. The second heat exchange component 32 can be made of materials with excellent thermal conductivity such as copper, aluminum or special alloys to improve the efficiency of heat exchange.

[0078] The fluid can be a liquid or a gas. The fluid can be water, a mixture of water and ethylene glycol, a refrigerant or air, etc. The fluid can be circulated to achieve a better temperature regulation effect. The fluid can flow in the fluid channel 310 to achieve heat transfer. For example, when the temperature of the battery cell 20 is high, a refrigerant can be introduced into the fluid channel 310, and the refrigerant can take away the heat from the area it flows through, thereby achieving heat dissipation for the battery cells 20 in the corresponding area. The fluid channel 310 can be designed as a straight channel, a curved channel or other complex shapes to increase the flow path of the fluid and improve the heat exchange efficiency.

[0079] The number of the fluid channels 310 can be one or more, which can be arbitrarily set according to the number of battery cells 20 and the requirements of heat exchange. The side of the second heat exchange element 32 extending toward the fluid channel 310 can extend into the fluid channel 310 or be accommodated in the mounting groove 311 .

[0080] The mounting groove 311 can be designed to be rectangular, circular or any shape suitable for the second heat exchange element 32. The mounting groove 311 can fix the second heat exchange element 32 by means of threads, snaps or welding to ensure the stability of the second heat exchange element 32 during operation. For example, the surface of the second heat exchange element 32 close to the inner wall of the mounting groove 311 can be provided with an external thread, and the inner wall of the mounting groove 311 can be provided with an internal thread, and the installation of the second heat exchange element 32 is achieved by threaded connection. The number of mounting grooves 311 can be one or more. The mounting groove 311 can correspond to one or more second heat exchange elements 32. For example, a second heat exchange element 32 can be arranged in each mounting groove 311.

[0081] The second heat exchange element 32 is accommodated in the installation groove 311, which means that the second heat exchange element 32 does not exceed the space defined by the installation groove 311, or the second heat exchange element 32 is located inside the installation groove 311 and does not exceed the groove opening of the installation groove 311.

[0082] The mounting groove 311 and the second heat exchange element 32 may be closely matched or may have a gap. For example, the width of the mounting groove 311 is greater than the width of the second heat exchange element 32, and a sealing ring, sealant, etc. may be provided between the second heat exchange element 32 and the mounting groove 311.

[0083] The fluid in the fluid channel 310 may flow into or cover the mounting groove 311 area to achieve heat exchange between the second heat exchange element 32 and the fluid.

[0084] In the battery device 100 of the embodiment of the utility model, one side of the second heat exchange element 32 is accommodated in the mounting groove 311, and the other side of the second heat exchange element 32 extends toward the fluid channel 310, which reduces the space occupied by the second heat exchange element 32 inside the box 10. In the extension direction of the mounting groove 311, the space occupied by the second heat exchange element 32 and the first heat exchange element 31 overlap, making the overall structure of the battery device 100 more compact, thereby improving the space utilization of the battery device 100, and thus improving the energy density of the battery device 100 under the same volume.

[0085] In addition, the first heat exchange component 31 has a fluid channel 310, so the heat exchange efficiency between the first heat exchange component 31 and the battery cell 20 can be improved by introducing fluid. Moreover, since the second heat exchange component 32 is accommodated in the mounting groove 311, the fluid in the fluid channel 310 can also improve the heat exchange efficiency between the second heat exchange component 32 and the battery cell 20. This double superposition heat exchange mechanism is conducive to improving the heat exchange efficiency between the heat exchange component 30 and the battery cell 20, thereby improving the heat dissipation and heating effect of the battery device 100.

[0086] Please refer to Figure 6 and Figure 7 ; Figure 7 Schematic diagram of the assembly structure of the first heat exchange element 31 and the second heat exchange element 32 provided in some embodiments of the utility model. In some embodiments, the first heat exchange element 31 includes a first plate 312 and a second plate 313, the first plate 312 is located between the battery cell 20 and the second plate 313, the second plate 313 includes a plate body 3130 and a guide groove 314 recessed in the plate body 3130 away from the first plate 312, and the first plate 312 is attached to the plate body 3130 and covers the guide groove 314 to form a fluid channel 310.

[0087] Specifically, the first plate 312 is a part of the first heat exchange element 31, and can be used to conduct heat and exchange heat with the fluid in the fluid channel 310. The second plate 313 is also a part of the first heat exchange element 31, and includes a plate body 3130 and a guide groove 314. The plate body 3130 provides structural support, while the guide groove 314 is used to guide the flow of the fluid. The guide groove 314 can be designed as a straight channel, a curved channel or other complex shapes to increase the flow path of the fluid and improve the heat exchange efficiency. The first plate 312 and the plate body 3130 can be bonded by welding, riveting, bonding or pressing.

[0088] Thus, the plate-type structural design of the first heat exchange component 31 simplifies the manufacturing process of the fluid channel 310, because the processing and assembly of the plate are relatively simple and the cost is low. Moreover, unlike the method of setting a plurality of independent pipes in the accommodating space 11, the fluid channel 310 formed in this way occupies less space, thereby further reducing the space occupied by the heat exchange component 30 inside the box 10, thereby improving the space utilization of the battery device 100, thereby improving the energy density of the battery device 100 under the same volume.

[0089] Please refer to Figure 6 In some embodiments, the first plate 312 is provided with a mounting groove 311 , and the mounting groove 311 passes through the first plate 312 and communicates with the guide groove 314 .

[0090] Specifically, the installation groove 311 can be penetrated by mechanical processing such as stamping, milling or laser cutting.

[0091] Thus, the through-mounting slot 311 design simplifies the installation process of the second heat exchange element 32. Since the mounting slot 311 is directly connected to the guide slot 314, the second heat exchange element 32 can be more easily positioned and fixed, which not only improves the assembly efficiency, but also reduces the error rate during the assembly process.

[0092] Please refer to Figure 6 In some embodiments, the surfaces of the second heat exchange element 32 and the first plate 312 facing the battery cells 20 are defined as inner surfaces, and the inner surface 320 of the second heat exchange element 32 is flush with the inner surface 3120 of the first plate 312 .

[0093] Specifically, the second heat exchange element 32 and the first plate 312 can be machined or processed in other ways to achieve the flushness of the inner surfaces of the two, such as polishing or coating. The coating method can keep the original profile of the second heat exchange element 32 and the first plate 312 unchanged, reduce material loss, and can also improve the thermal conductivity of the second heat exchange element 32 and the first plate 312 or reduce contact thermal resistance by adding a coating with good thermal conductivity.

[0094] In this way, the second heat exchange element 32 is ensured to be flush with the inner surface 3120 of the first plate 312, which can effectively improve the heat exchange performance of the second heat exchange element 32 without occupying additional space inside the battery device 100, thereby improving the heat exchange efficiency of the battery device 100.

[0095] In some embodiments, the surfaces of the second heat exchange element 32 and the first plate 312 facing away from the battery cell 20 are defined as outer surfaces. The outer surface of the second heat exchange element 32 may be flush with the outer surface of the first plate 312 or may extend beyond the outer surface of the first plate 312 and extend into the fluid channel 310.

[0096] Please refer to Figure 6 In some embodiments, the second heat exchange element 32 is embedded in the mounting groove 311 .

[0097] Thus, this embedded design improves the structural stability of the heat exchange assembly 30. The close fit between the second heat exchange element 32 and the first heat exchange element 31 reduces vibration and displacement, ensuring reliability in long-term operation. In addition, by installing in an embedded manner, it is possible to eliminate the need for fasteners such as screws and bolts, thereby reducing manufacturing costs and improving assembly efficiency.

[0098] Please refer to Figure 2 In some embodiments, there are multiple battery cells 20 , and multiple battery cell assemblies 40 are arranged in multiple rows of battery cell assemblies 40 in the accommodating space 11 . The guide grooves 314 extend in a zigzag shape and are arranged corresponding to the multiple rows of battery cell assemblies 40 .

[0099] Specifically, the number of battery cells 20 may be two, three, four or even more. The number of rows of battery cell assemblies 40 may be two, three, four or even more. Multiple rows of battery cell assemblies 40 may be arranged in the accommodating space 11 according to certain rules. For example, multiple rows of battery cell assemblies 40 may be arranged in a rectangular array.

[0100] Thus, the zigzag extension design of the guide groove 314 enables the fluid channel 310 to be arranged corresponding to multiple rows of battery cell assemblies 40, so that the heat can be distributed more evenly, ensuring that each row of battery cells 20 can obtain effective heat exchange, thereby improving the heat exchange efficiency of the entire battery device 100. In addition, through the design of the zigzag extension of the guide groove 314, the flow path of the fluid in the first heat exchange element 31 is extended, increasing the contact time and area of ​​the fluid and the first heat exchange element 31, thereby improving the heat exchange effect of the first heat exchange element 31.

[0101] Please refer to Figure 7In some embodiments, the guide groove 314 has a first end 3140 and a second end 3141 , the first end 3140 is provided with a water inlet connector 50 , and the second end 3141 is provided with a water outlet connector 60 .

[0102] Specifically, the water inlet connector 50 and the water outlet connector 60 can be designed as quick-insert connectors, pagoda connectors or other types of connectors. The water inlet connector 50 can be connected to an external water source. The water outlet connector 60 can be connected to an external liquid storage device. The water inlet connector 50 and the water outlet connector 60 can also be connected by a pipeline to achieve the circulation of the fluid, thereby improving the heat exchange efficiency.

[0103] In this way, the fluid can flow into the guide groove 314 from the water inlet joint 50 and flow out of the guide groove 314 from the water outlet joint 60. This realizes the inflow and outflow of the fluid to improve the effect of heat exchange using the fluid, and avoids the failure of the thermal management function due to the inability to replace the fluid causing the temperature of the fluid to be close to that of the battery cell 20.

[0104] Please refer to Figure 2 and Figure 4 In some embodiments, the water inlet connector 50 and the water outlet connector 60 are both disposed on the same side of the multiple rows of battery cell assemblies 40 .

[0105] Specifically, taking the arrangement of multiple rows of battery cell assemblies 40 in a rectangular array as an example, the water inlet connector 50 and the water outlet connector 60 can both be disposed on one side of the length direction of the multiple rows of battery cell assemblies 40 .

[0106] In this way, arranging the water inlet and outlet joints 60 on the same side of multiple rows of battery cell assemblies 40 helps to reduce the intersection of fluid pipelines inside the battery device 100, and reduces the overall space occupied by the water inlet joint 50 and the water outlet joint 60 in the box 10, thereby improving the space utilization inside the battery device 100, thereby improving the energy density of the battery device 100 under the same volume. In addition, the centralized arrangement of the water inlet joint 50 and the water outlet joint 60 reduces the number of pipe connection points, simplifies the installation process, and also reduces the difficulty and cost of maintenance. Maintenance personnel can more easily access the joints for necessary inspection and replacement.

[0107] Please refer to Figure 2 and Figure 4 In some embodiments, the accommodating space 11 includes a first compartment 12 and a second compartment 13 , which are separated by a crossbeam 14 , the battery cell 20 is disposed in the first compartment 12 , the water outlet connector 60 and the water inlet connector 50 are both disposed through the first plate 312 , and the water outlet connector 60 and the water inlet connector 50 are both disposed in the second compartment 13 and are spaced apart from the crossbeam 14 .

[0108] Specifically, the accommodating space 11 is divided into two independent parts. The first compartment 12 can be used to accommodate the battery cell 20, and the second compartment 13 can be used to accommodate the water outlet connector 60, the water inlet connector 50 or other components.

[0109] In this way, since the water outlet joint 60 and the water inlet joint 50 do not need to be provided with pipes passing through the cross beam 14, the provision of the water outlet joint 60 and the water inlet joint 50 will not affect the structural strength of the cross beam 14, thereby ensuring the overall joint strength of the battery device 100. In addition, the water inlet and water outlet joints 60 are centrally arranged in the second compartment 13, which facilitates the maintenance and repair of the fluid pipeline system. Maintenance personnel can more easily access the joints without disassembling the battery cell 20, which simplifies the maintenance process.

[0110] In some embodiments, the cross beam 14 can be an expansion beam. The expansion beam can be used to withstand the expansion force of the battery cell 20, effectively deal with the local expansion of the battery cell 20, have a certain structural strength, and support and strengthen the structure of the battery device 100. In this way, the cross beam 14 can not only withstand the expansion force of the battery cell 20, but also serve as a component to separate the first compartment 12 and the second compartment 13. This can avoid the need to set up an additional beam body in the battery device 100, thereby improving the space utilization of the battery device 100, thereby improving the energy density of the battery device 100 under the same volume.

[0111] Please refer to Figure 3 and Figure 7 In some embodiments, there are multiple second heat exchange elements 32 , and the multiple second heat exchange elements 32 are all arranged corresponding to the extension path of the guide groove 314 .

[0112] Specifically, the number of the second heat exchange elements 32 may be two, three, four or even more. The second heat exchange element 32 may abut against the bottom wall of the guide groove 314. The width of the second heat exchange element 32 may be smaller than the groove width of the guide groove 314, so as to facilitate the flow of the fluid.

[0113] In this way, the plurality of second heat exchange elements 32 are arranged corresponding to the extension path of the guide groove 314 . This design allows the fluid to contact each second heat exchange element 32 more evenly when flowing through the guide groove 314 , thereby improving the heat exchange efficiency.

[0114] Please refer to Figure 3 In some embodiments, the number of the second heat exchange elements 32 corresponds to the number of the battery cells 20 .

[0115] Specifically, the plurality of second heat exchange elements 32 may be arranged in the same manner as the battery cells 20. For example, for the battery cells 20 arranged in a rectangular array, the second heat exchange elements 32 may also be arranged in a rectangular array.

[0116] Thus, the number of second heat exchange elements 32 corresponds to the number of battery cells 20, and this design can achieve accurate temperature control of each battery cell 20. Each battery cell 20 region is provided with a corresponding second heat exchange element 32 to ensure uniformity and efficiency of heat exchange.

[0117] Please refer to Figure 3 and Figure 6 In some embodiments, the battery device 100 further includes a heat conductive member 70 , and the heat conductive member 70 is supported between two adjacent side surfaces of the heat exchange assembly 30 and the battery cell 20 .

[0118] Specifically, the heat conducting member 70 can be used to improve the heat conduction efficiency and ensure that heat can be transferred between the battery cell 20 and the heat exchange assembly 30. The heat conducting member 70 can be made of a material with high thermal conductivity, such as a thermally conductive silicone sheet, thermally conductive silicone grease, or a metal (such as copper or aluminum), etc. These materials have excellent thermal conductivity and can quickly transfer heat. The heat conducting member 70 can be designed as a hollow structure, and the inner cavity is filled with a cooling medium, such as a phase change medium, to enhance the effect of heat conduction and temperature control.

[0119] In this way, the heat conductor 70 is supported between two adjacent side surfaces of the heat exchange assembly 30 and the battery cell 20, and can effectively and evenly transfer heat between the battery cell 20 and the heat exchange assembly 30, thereby improving the heat exchange efficiency and consistency of the heat exchange.

[0120] In some embodiments, the heat conducting member 70 may be a heat conducting adhesive, and specifically, the heat conducting adhesive may be a silicone heat conducting potting adhesive, a heat conducting silica gel, or the like.

[0121] In this way, the thermal conductive adhesive can not only be used for heat conduction, but also for bonding the battery cell 20, so that the battery cell 20 can be stably fixed in the box 10, preventing the battery cell 20 from falling off during operation, and reducing the damage caused by vibration to the battery cell 20, thereby improving the stability and life of the battery cell 20. The thermal conductive adhesive fills the gap between the battery cell 20 and the heat exchange assembly 30, effectively reducing thermal resistance and improving heat conduction efficiency.

[0122] Please refer to Figure 6 In some embodiments, the second heat exchange element 32 can produce a Peltier effect, and includes a first portion 321 and a second portion 322 stacked with the first portion 321, wherein the first portion 321 is connected to the heat conducting element 70, and the second portion 322 is disposed near the fluid channel 310 and is used to contact the fluid.

[0123] Specifically, in the battery device 100, the second heat exchange element 32 utilizes the Peltier effect, that is, the second heat exchange element 32 can produce a cooling or heating effect by controlling the current to achieve precise temperature control. The Peltier effect is a phenomenon in which heat absorption or heat release occurs at the junction when a circuit composed of two different conductors or semiconductor materials is passed through with direct current.

[0124] During use, when the battery cell 20 needs to be cooled, the system will introduce refrigerant into the fluid channel 310 through the water inlet connector 50. The refrigerant absorbs the heat generated by the battery cell 20 during the flow. At the same time, current is passed through the second heat exchange element 32 to produce a cooling effect using the Peltier effect. The Peltier effect causes the first part 321 of the second heat exchange element 32 to absorb heat and the second part 322 to release heat, thereby achieving refrigeration. The flow of the refrigerant takes away the heat generated by the heat exchange with the battery cell 20, ensuring that the temperature of the battery cell 20 is reduced to a safe range.

[0125] When the battery cell 20 needs to be cold-started, the temperature of the battery cell 20 is low and the battery cell 20 needs to be heated. During cold-starting, the positive and negative poles of the second heat exchange element 32 are reversed to change the direction of the current. Through the Peltier effect, the heat absorption and heat release positions of the second heat exchange element 32 change. At this time, the first part 321 of the second heat exchange element 32 will become heat release, and the second part 322 will absorb heat, thereby heating the battery cell 20. This heating process can quickly increase the temperature of the battery cell 20 to a normal working state, ensuring that the battery cell 20 can operate normally when started.

[0126] In this way, the second heat exchange element 32 can produce a Peltier effect, which allows heat transfer through the control of current, thereby providing efficient heat exchange capabilities. The use of the Peltier effect can significantly improve the heating or cooling efficiency of the battery device 100 and reduce the energy consumption of the process. In addition, the Peltier effect is reversible, that is, the direction of heat flow can be changed by changing the direction of current. This means that the second heat exchange element 32 can be heated or cooled as needed, providing two-way temperature control.

[0127] Please refer to Figure 2 and Figure 3 In some embodiments, the box body 10 includes a surrounding wall 15 , the surrounding wall 15 is provided with an opening 150 , and the first plate 312 covers the opening 150 .

[0128] Specifically, the surrounding wall 15 may constitute a side portion of the box body 10. The first plate 312 may serve as one of the walls of the box body 10. For example, the first plate 312 may serve as a bottom wall of the box body 10. The first plate 312 may be fixedly connected to the surrounding wall 15 by welding, threading, bonding, etc., so as to maintain the stability of the first plate 312 when in use.

[0129] In this way, the first plate 312 can not only be used as a component for realizing heat exchange of the battery cell 20, but also can provide the function of the wall of the box body 10 to enhance the sealing of the box body 10. This reduces the manufacturing cost of the box body 10, and because there is no need to set up an additional wall to cover the opening 150, the provision of the first heat exchange assembly 30 does not increase the space occupied by the box body 10, thereby improving the space utilization inside the battery device 100, thereby improving the energy density of the battery device 100 under the same volume.

[0130] Please refer to Figure 2 In a specific embodiment, the battery device 100 includes a housing 10, battery cells 20 and a heat exchange assembly 30. The housing 10 has a storage space 11. There are multiple battery cells 20, and multiple battery cell assemblies 40 are arranged in multiple rows of battery cell assemblies 40 in the storage space 11. The multiple rows of battery cells 20 are arranged in a rectangular array.

[0131] Please refer to Figure 3 The heat exchange assembly 30 is disposed opposite to the battery cell 20 , and includes a first heat exchange element 31 and a second heat exchange element 32 . The first heat exchange element 31 and the second heat exchange element 32 are both thermally connected to the battery cell 20 .

[0132] Please refer to Figure 3 and Figure 6 The first heat exchange member 31 includes a first plate 312 and a second plate 313. The first plate 312 is located between the battery cell 20 and the second plate 313. The second plate 313 includes a plate body 3130 and a guide groove 314 that is recessed in the plate body 3130 away from the first plate 312. The first plate 312 and the plate body 3130 are attached to and cover the guide groove 314 to form a fluid channel 310. The guide groove 314 extends in a zigzag shape and is arranged corresponding to multiple rows of battery cell assemblies 40.

[0133] Please refer to Figure 3 and Figure 6 The first plate 312 is provided with a mounting groove 311, which penetrates the first plate 312 and communicates with the guide groove 314. The housing 10 includes a surrounding wall 15, which is provided with an opening 150, and the first plate 312 covers the opening 150. The fluid channel 310 is communicated with the mounting groove 311. The second heat exchange element 32 is embedded in the mounting groove 311.

[0134] Please refer to Figure 2 and Figure 7 The guide groove 314 has a first end 3140 and a second end 3141. The first end 3140 is provided with a water inlet connector 50, and the second end 3141 is provided with a water outlet connector 60. The water inlet connector 50 and the water outlet connector 60 are both arranged on the same side of the multiple rows of battery cell assemblies 40.

[0135] Please refer to Figure 2 , Figure 4 and Figure 6 The accommodating space 11 includes a first compartment 12 and a second compartment 13 , which are separated by a crossbeam 14 , the battery cell 20 is arranged in the first compartment 12 , the water outlet connector 60 and the water inlet connector 50 are both passed through the first plate 312 , and the water outlet connector 60 and the water inlet connector 50 are both arranged in the second compartment 13 and are spaced from the crossbeam 14 .

[0136] Please refer to Figure 3 and Figure 6 The surfaces of the second heat exchange element 32 and the first plate 312 facing the battery cell 20 are defined as inner surfaces, and the inner surface 320 of the second heat exchange element 32 is flush with the inner surface 3120 of the first plate 312. There are multiple second heat exchange elements 32. The number of second heat exchange elements 32 corresponds to the number of battery cells 20. The multiple second heat exchange elements 32 are all arranged corresponding to the extension path of the guide groove 314.

[0137] Please refer to Figure 3 and Figure 6 The battery device 100 further includes a heat conductive member 70, which is supported between two adjacent side surfaces of the heat exchange assembly 30 and the battery cell 20. The second heat exchange member 32 can produce a Peltier effect, and the second heat exchange member 32 includes a first portion 321 and a second portion 322 stacked with the first portion 321. The first portion 321 is connected to the heat conductive member 70. The second portion 322 is disposed near the fluid channel 310 and is used to contact the fluid.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it; although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and description of the utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: The battery device comprises: A box body, wherein the box body has a containing space; A battery cell, wherein the battery cell is arranged in the accommodating space; A heat exchange component, wherein the heat exchange component is arranged opposite to the battery cell, and the heat exchange component includes a first heat exchange element and a second heat exchange element, wherein the first heat exchange element and the second heat exchange element are both thermally connected to the battery cell, the first heat exchange element has a fluid channel for passing fluid, the first heat exchange element is provided with a mounting groove, the fluid channel is connected to the mounting groove, one side of the second heat exchange element is accommodated in the mounting groove, and the other side of the second heat exchange element extends toward the fluid channel.

2. The battery device according to claim 1, characterized in that: The first heat exchange element includes a first plate and a second plate, the first plate is located between the battery cell and the second plate, the second plate includes a plate body and a guide groove recessed in the plate body away from the first plate, the first plate is attached to the plate body and covers the guide groove to form the fluid channel.

3. The battery device according to claim 2, characterized in that: The first plate is provided with the mounting groove, and the mounting groove passes through the first plate and is communicated with the guide groove.

4. The battery device according to claim 2, characterized in that: The surfaces of the second heat exchange element and the first plate facing the battery cell are defined as inner surfaces, and the inner surface of the second heat exchange element is flush with the inner surface of the first plate.

5. The battery device according to claim 1, characterized in that: The second heat exchange element is embedded in the installation groove.

6. The battery device according to claim 2, characterized in that: The number of the battery cells is multiple, and the multiple battery cell assemblies are arranged in multiple rows of battery cell assemblies in the accommodating space. The guide grooves extend in a zigzag shape and are arranged corresponding to the multiple rows of battery cell assemblies.

7. The battery device according to claim 6, characterized in that: The guide groove has a first end and a second end, the first end is provided with a water inlet joint, and the second end is provided with a water outlet joint.

8. The battery device according to claim 7, characterized in that: The water inlet connector and the water outlet connector are both arranged on the same side of the multiple rows of battery monomer assemblies.

9. The battery device according to claim 8, characterized in that: The accommodating space includes a first compartment and a second compartment, the first compartment and the second compartment are separated by a crossbeam, the battery cell is arranged in the first compartment, the water outlet joint and the water inlet joint are both passed through the first plate, and the water outlet joint and the water inlet joint are both arranged in the second compartment and are spaced from the crossbeam.

10. The battery device according to claim 6, characterized in that: There are multiple second heat exchange elements, and each of the multiple second heat exchange elements is arranged corresponding to the extension path of the guide groove.

11. The battery device according to claim 10, characterized in that: The number of the second heat exchange elements corresponds one to one to the number of the battery cells.

12. The battery device according to claim 2, characterized in that: The box body comprises a surrounding wall, the surrounding wall is provided with an opening, and the first plate covers the opening.

13. The battery device according to claim 1, characterized in that: The battery device further includes a heat conductive member supported between the heat exchange assembly and two adjacent side surfaces of the battery cell.

14. The battery device according to claim 13, characterized in that: The second heat exchange element can produce a Peltier effect, and includes a first part and a second part stacked with the first part, the first part is connected to the heat conductive element, and the second part is arranged close to the fluid channel and used to contact the fluid.

15. An electrical device, characterized in that: The electrical device comprises: The battery device according to any one of claims 1 to 14.

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