Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, the battery device comprises a battery box body, the battery box body is provided with an accommodating space for accommodating a battery monomer, the battery box body comprises a bottom plate, the bottom plate is a metal piece, and one part of the bottom plate is bent in a direction deviating from the accommodating space; a containing groove communicated with the containing space is formed in the side, close to the containing space, of the bottom plate. And the heat exchange device comprises a heat exchange pipe, and the heat exchange pipe is arranged in the containing groove. In the technical scheme of the embodiment of the invention, the bottom plate which is a metal piece is arranged, and the heat exchange pipe is placed in the accommodating groove, so that compared with the technical scheme of adopting a cold plate for heat exchange, on the basis of ensuring the protection performance of the bottom plate on the heat exchange pipe and the battery monomer, the mounting process can be simplified, the number of parts required for mounting is reduced, and the mounting efficiency is improved. Therefore, the cost of the battery device can be reduced, and the weight of the battery device can be reduced.

Description

Technical Field

[0001] This application relates to the field of batteries, specifically to a battery device and an electrical device. Background Technology

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

[0003] In related technologies, existing battery devices generally use cold plates for cooling. However, the cold plates need to be connected to the outer frame of the battery box by brazing or friction stir welding, which makes the installation process of the cold plates complicated. In addition, the number of parts required for the installation of the cold plates is large, which increases the cost and weight of the battery device, and there is room for improvement. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can solve the problems of high cost and heavy weight of battery devices.

[0005] In a first aspect, this application provides a battery device, comprising: a battery housing having a receiving space for accommodating individual battery cells, the battery housing including a base plate, the base plate being a metal component and a portion of the base plate being bent away from the receiving space to form a receiving groove communicating with the receiving space on the side of the base plate near the receiving space; and a heat exchange device including a heat exchange tube disposed within the receiving groove.

[0006] According to the battery device of the present application embodiment, the base plate, which is made of metal, can improve the structural strength of the base plate and ensure the protection performance of the heat exchange tube and the battery cell. By bending the base plate to form a receiving groove, the structural strength of the base plate can be guaranteed. Furthermore, by placing the heat exchange tube in the receiving groove, the heat exchange tube can be prevented from protruding from the outer surface of the base plate, which can reduce the occupation of the internal space of the battery device and ensure the energy density of the battery device. At the same time, compared with the technical solution of using a cold plate for heat exchange, based on ensuring the protection performance of the base plate for the heat exchange tube and the battery cell, the installation process can be simplified, the number of parts required for installation can be reduced, thereby reducing the cost and weight of the battery device.

[0007] According to some embodiments of this application, the base plate includes a first support section and a second support section, the second support section defining the receiving groove, the first support section being disposed on the outer periphery of the second support section, and the surface of the heat exchange device near the receiving space being flush with the surface of the first support section near the receiving space.

[0008] In the above technical solution, by placing the heat exchange device in the second support section and making the heat exchange device flush with the first support section, it is possible to ensure that the heat exchange device is in direct contact with the battery cell, thus ensuring the heat exchange effect on the battery cell. Furthermore, the heat exchange device can cooperate with the first support section to jointly support the battery cell, which can reduce stress concentration and improve the support effect on the battery cell. At the same time, it can prevent the heat exchange device from protruding from the outer surface of the first support section, thereby reducing the space occupied inside the battery device and ensuring the energy density of the battery device.

[0009] In some embodiments, the surface of the heat exchange tube near the receiving space is coated with an insulating layer.

[0010] In the above technical solution, by setting an insulating layer on the surface of the heat exchange tube, insulation between the heat exchange tube and the battery cell can be achieved, which can reduce the probability of leakage of the battery device and ensure the safety of the battery device.

[0011] In some embodiments, the heat exchange tube is bonded to the base plate by an adhesive, and the surface of the adhesive near the receiving space is flush with the surface of the first support section near the receiving space.

[0012] In the above technical solution, by setting a colloid flush with the surface of the first support section and bonding the heat exchange tube to the base plate through the colloid, the connection effect between the heat exchange tube and the base plate can be improved. The colloid can also cooperate with the first support section to jointly support the battery cell, thereby improving the support effect on the battery cell. At the same time, it can prevent the colloid from protruding from the outer surface of the first support section, reduce the occupation of the internal space of the battery device, and ensure the energy density of the battery device.

[0013] In some embodiments, the battery device further includes an insulating layer disposed on the surface of the heat exchange tube, the colloid, and the first support section near the receiving space.

[0014] In the above technical solution, by setting an insulating layer on the surface of the heat exchange tube, the colloid and the first support section, insulation between the heat exchange tube and the battery cell can be achieved, and the insulation area between the heat exchange tube and the battery cell can be increased, which can improve the insulation effect on the battery cell, thereby reducing the probability of leakage of the battery device and ensuring the safety of the battery device.

[0015] According to some embodiments of this application, the battery housing further includes: an outer frame, the outer frame being disposed on the outer periphery of the base plate, the inner periphery of the outer frame having a support plate, and the base plate being adapted to overlap the support plate and be connected to the support plate.

[0016] In the above technical solution, by setting a support plate on the inner periphery of the outer frame and connecting the bottom plate to the outer frame through the support plate, the contact area between the bottom plate and the outer frame can be increased, thereby improving the stability of the connection between the bottom plate and the outer frame and improving the sealing performance of the battery device.

[0017] In some embodiments, the base plate is bonded to the support plate; and / or, the base plate is riveted to the support plate; and / or, the base plate is welded to the support plate.

[0018] In the above technical solution, the base plate can be connected to the support plate by riveting, welding and bonding, which can improve the reliability and stability of the connection between the base plate and the support plate, ensure the structural strength of the connection between the base plate and the support plate, facilitate operation, and improve the sealing of the connection between the base plate and the support plate.

[0019] According to some embodiments of this application, the base plate is a stamped part.

[0020] In the above technical solution, the use of a stamped base plate can ensure the structural strength of the base plate, ensure the protection performance of the base plate for the heat exchange device and battery cells, and facilitate processing.

[0021] According to some embodiments of this application, the base plate is a steel plate.

[0022] In the above technical solution, using a steel plate as the base plate can ensure the structural strength of the base plate and reduce costs.

[0023] According to some embodiments of this application, the heat exchange device further includes a heat exchange joint, at least a portion of which is disposed within the accommodating space. The heat exchange joint connects both ends of the heat exchange tube and defines an inlet chamber and an outlet chamber communicating with the flow channel of the heat exchange tube.

[0024] In the above technical solution, using a heat exchange joint to connect the heat exchange tubes allows the heat exchange medium to be introduced and circulated into the heat exchange tubes, which can improve the heat exchange effect.

[0025] According to some embodiments of this application, the heat exchange tube includes multiple tube segments connected in sequence, and the extension directions of adjacent tube segments are different.

[0026] In the above technical solution, by setting multiple pipelines, on the one hand, the length of the heat exchange tube is increased, the contact area with the battery cell is increased, and the heat exchange effect is improved. On the other hand, by setting multiple pipelines with different extension directions, the contact area between the heat exchange tube and the base plate can be increased, the reliability of the connection is increased, and the stability of the entire battery device is improved.

[0027] According to some embodiments of this application, the heat exchange tube is provided with a separator that extends along the extension direction of the heat exchange tube to divide the flow channel inside the heat exchange tube into multiple sub-flow channels.

[0028] In the above technical solution, by setting multiple partitions inside the heat exchange tube, on the one hand, the structural strength of the heat exchange tube can be increased and its service life can be improved; on the other hand, the contact area between the heat exchange medium and the tube wall can be increased, thereby improving the heat transfer efficiency. Moreover, each sub-channel can be used as an independent heat exchange unit, which helps to distribute heat more evenly.

[0029] Secondly, this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0030] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0031] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0032] Figure 1 This is a schematic diagram of an electrical device in related technologies;

[0033] Figure 2 This is a schematic diagram of a battery device in related technologies;

[0034] Figure 3 A partial structural schematic diagram of a battery device provided in some embodiments of this application from one view.

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

[0036] Figure 5 It is along Figure 4 A partial sectional view of the AA section;

[0037] Figure 6 yes Figure 5 Enlarged view of the C-structure;

[0038] Figure 7 It is along Figure 4 A partial sectional view of the BB section;

[0039] Figure 8 yes Figure 7 Enlarged view of the D-structure;

[0040] Figure 9 Exploded views of partial structures of the battery device provided in some embodiments of this application;

[0041] Figure 10 This is a partial structural diagram of the outer frame provided for some embodiments of this application.

[0042] Figure label:

[0043] Battery unit 1000, power supply unit 2000.

[0044] The battery casing is 100mm, the first part is 110mm, the second part is 120mm, the storage space is 130mm, and the individual battery cells are 200mm.

[0045] Base plate 10, first support section 11, second support section 12, receiving groove 121,

[0046] Outer frame 20, support plate 21, heat exchange device 30, colloid 40, insulation layer 50, rivet 60, sealing ring 70.

[0047] Heat exchange tube 31, tube section 311, flow channel 312, partition 3121, sub-flow channel 3122, heat exchange joint 32. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0050] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0053] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0054] In this application, "multiple" means two or more (including two).

[0055] In this application, a battery refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack. A battery may include a battery housing for encapsulating one or more battery cells or multiple battery modules. The battery housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0056] Battery cells may include lithium-ion rechargeable batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and this application embodiment is not limited to these. Battery cells may be cylindrical, flat, cuboid, or other shapes, etc., and this application embodiment is not limited to these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this application embodiment is not limited to these.

[0057] Currently, judging from market trends, the application of batteries is becoming increasingly widespread. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of the application areas of power batteries, the market demand for them is also constantly increasing.

[0058] In some electrical devices, battery devices are used for power supply. The battery device includes a battery box and individual battery cells housed inside the battery box. The individual battery cells are installed within the housing space of the battery box. During the operation of the individual battery cells, heat is generated. The battery box usually also has a heat exchange device, which can remove the heat generated by the individual battery cells by introducing a heat exchange medium, thereby alleviating the overheating of the individual battery cells and reducing the impact of heat on the battery's lifespan and performance. Existing heat exchange devices are generally cold plates, which need to be connected to the outer frame of the battery box by brazing or friction stir welding. This makes the installation process complex and requires a large number of parts, resulting in higher cost and heavier weight for the battery device.

[0059] Based on this, this application proposes a battery device, including: a battery housing having a receiving space for accommodating individual battery cells, the battery housing including a base plate, the base plate being a metal part and a portion of the base plate being bent away from the receiving space to form a receiving groove communicating with the receiving space on the side of the base plate near the receiving space; and a heat exchange device including a heat exchange tube disposed in the receiving groove.

[0060] In the technical solution of this application embodiment, by using a base plate made of metal, the structural strength of the base plate can be improved, ensuring the protection performance of the heat exchange tube and the battery cell. By bending the base plate to form a receiving groove, the structural strength of the base plate can be ensured, and by placing the heat exchange tube in the receiving groove, the heat exchange tube can be prevented from protruding from the outer surface of the base plate, reducing the occupation of the internal space of the battery device and ensuring the energy density of the battery device. At the same time, compared with the technical solution of using a cold plate for heat exchange, based on ensuring the protection performance of the base plate for the heat exchange tube and the battery cell, the installation process can be simplified, the number of parts required for installation can be reduced, thereby reducing the cost and weight of the battery device.

[0061] The battery device 1000 disclosed in the embodiments of this application can be used, but is not limited to, in electrical devices 2000 such as vehicles, ships or aircraft. The power system of the electrical device 2000 can be composed of the battery device 1000 disclosed in this application, so as to improve the reliability of the electrical device 2000.

[0062] For example, the electrical device 2000 disclosed in this application embodiment may be, but is not limited to, vehicles, mobile phones, tablets, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles may be fuel vehicles, natural gas vehicles, new energy vehicles, or rail vehicles; new energy vehicles may be pure electric vehicles, hybrid vehicles, or range-extended vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, etc.; power 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.

[0063] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The battery device 1000 can be used to power the vehicle, and the battery device 1000 can be disposed at the bottom, front, or rear of the vehicle. The battery device 1000 can be used to power the vehicle; for example, the battery device 1000 can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor, the controller being used to control the battery device 1000 to supply power to the motor, for example, for the vehicle's starting, navigation, and operating power needs.

[0064] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the battery structure provided in some embodiments of this application.

[0065] The battery device 1000 includes a battery housing 100 and a battery cell 200. The battery housing 100 includes a first part 110 and a second part 120, and the battery cell 200 is accommodated between the first part 110 and the second part 120.

[0066] A battery cell 200 refers to the smallest unit that makes up a battery. For example, a battery cell 200 may include a casing, an electrode assembly, and an electrolyte. The casing is used to house the electrode assembly and the electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell 200 mainly relies on the movement of metal ions between the positive and negative electrode plates to function. The battery device 1000 may contain multiple battery cells 200, which can be connected in series, parallel, or in a mixed configuration via electrical connectors.

[0067] Below, please refer to the appendix. Figures 3-10The battery device 1000 according to an embodiment of this application includes: a battery housing 100 having a receiving space 130 for receiving a single battery cell 200, the battery housing 100 including a base plate 10, the base plate 10 being a metal part and a portion of the base plate 10 being bent away from the receiving space 130 to form a receiving groove 121 communicating with the receiving space 130 on the side of the base plate 10 near the receiving space 130; and a heat exchange device 30 including a heat exchange tube 31 disposed in the receiving groove 121.

[0068] The battery device 1000 includes a battery housing 100, battery cells 200, and a heat exchange device 30. The battery housing 100 defines a receiving space 130. The battery cells 200 are disposed within the receiving space 130. The battery housing 100 includes a base plate 10 and an outer frame 20. The outer frame 20 surrounds the outer periphery of the base plate 10 and cooperates with the base plate 10 to jointly define the receiving space 130.

[0069] A portion of the base plate 10 faces away from the receiving space 130 (e.g.) Figure 9 (As shown in the top-to-bottom direction) bend to bend on the side of the base plate 10 near the receiving space 130 (e.g.) Figure 9 The upper side shown forms a receiving groove 121, and the receiving groove 121 is connected to the receiving space 130. That is, the base plate 10 can be integrally stamped to stamp out the receiving groove 121, which can ensure the structural strength of the base plate 10 and facilitate processing.

[0070] The base plate 10 is a metal part, which can improve the structural strength of the base plate 10. For example, the base plate 10 can be a steel plate, which helps to reduce costs while ensuring the structural strength of the base plate 10.

[0071] Typically, the battery box 100 includes a first part 110 and a second part 120. The second part 120 is located above the first part 110. The bottom plate 10 of the battery box 100 can be the bottom structure of the first part 110. Taking the first part 110 of the battery box 100 as an example, the receiving groove 121 is located on the upper side of the bottom plate 10. The bottom plate 10 of the battery box 100 can also be the top part of the second part 120. Taking the second part 120 of the battery box 100 as an example, the receiving groove 121 is located on the lower side of the bottom plate 10. The receiving space 130 of the battery box 100 is located between the bottom plate 10 of the first part 110 and the bottom plate 10 of the second part 120 and is surrounded by the outer frame 20.

[0072] The heat exchange device 30 contains a heat exchange medium, which is usually an insulating working fluid, such as air, deionized water, hydrocarbons, fluorinated liquids, refrigerants, etc. This ensures the heat exchange effect of the heat exchange device 30 and prevents the battery device 1000 from leaking electricity due to leakage of the heat exchange medium, thus ensuring the safety of the battery device 1000 in use.

[0073] The heat exchange device 30 includes a heat exchange tube 31 with a flow channel 312. The heat exchange medium is located in the flow channel 312, and the heat exchange tube 31 is located in the receiving tank 121. Compared with the technical solution of using a cold plate for heat exchange, since the heat exchange tube 31 is directly located in the receiving tank 121, the installation process of the heat exchange device 30 can be simplified, the number of parts required for the installation of the heat exchange device 30 can be reduced, thereby reducing the cost of the battery device 1000 and reducing the weight of the battery device 1000.

[0074] Furthermore, since the receiving groove 121 is connected to the receiving space 130, that is, the side of the receiving groove 121 facing the receiving space 130 (e.g.) Figure 9 The upper side shown is open, so that one side of the heat exchange tube 31 (as shown) is open. Figure 9 The upper side (as shown) can directly contact the battery cell 200, enabling cooling or heating of the battery cell 200, thus ensuring heat exchange efficiency to a certain extent. The other side of the heat exchange tube 31 (as shown) Figure 9 The lower side shown can be covered by the base plate 10, which can ensure the heat preservation performance to a certain extent, thereby solving the problems of heat preservation and heat exchange at the same time, which is beneficial to improving the driving range of the battery device 1000 when it works in a cold environment.

[0075] Since the heat exchange tube 31 is located within the receiving groove 121 of the base plate 10, the heat exchange tube 31 and the base plate 10 can be aligned in the thickness direction of the battery box 100 (e.g., ...). Figure 3 The heat exchange tubes overlap in the vertical direction shown, meaning that the heat exchange tubes 31 do not need to occupy additional space in this direction, which can avoid the reduction of energy density of the battery device 1000 to a certain extent. The heat exchange tubes 31 can be installed into the receiving groove 121 of the base plate 10 by means of plugging or bonding, which is convenient for disassembly and maintenance. The heat exchange tubes 31 can also be integrally formed with the base plate 10, which is convenient for processing.

[0076] In the technical solution of this application embodiment, by setting the base plate 10 as a metal part, the structural strength of the base plate 10 can be improved, and the protection performance of the heat exchange tube 31 and the battery cell 200 can be guaranteed. By bending the base plate 10 to form the receiving groove 121, the structural strength of the base plate 10 can be guaranteed. Moreover, by placing the heat exchange tube 31 in the receiving groove 121, the heat exchange tube 31 can be prevented from protruding from the outer surface of the base plate 10, which can reduce the occupation of the internal space of the battery device 1000 and guarantee the energy density of the battery device 1000. At the same time, compared with the technical solution of using a cold plate for heat exchange, based on ensuring the protection performance of the base plate 10 for the heat exchange tube 31 and the battery cell 200, the installation process can be simplified and the number of parts required for installation can be reduced, thereby reducing the cost and weight of the battery device 1000.

[0077] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, according to some embodiments of this application, the base plate 10 includes a first support section 11 and a second support section 12. The second support section 12 defines a receiving groove 121. The first support section 11 is disposed on the outer periphery of the second support section 12. The surface of the heat exchange device 30 near the receiving space 130 is flush with the surface of the first support section 11 near the receiving space 130.

[0078] like Figure 6 and Figure 9 As shown, the second support section 12 defines a receiving groove 121, which is formed by bending a part of the base plate 10. That is, both the first support section 11 and the second support section 12 are formed by bending the base plate 10, which can ensure the structural strength of the base plate 10 and facilitate processing. The second support section 12 is the bottom of the receiving groove 121, which is used to support the heat exchange device 30 and the battery cell 200. The first support section 11 is located on the outer periphery of the second support section 12, which is conducive to the connection between the first support section 11 and the outer frame 20 of the battery box 100 and facilitates the installation of the base plate 10.

[0079] like Figure 3 , Figure 5 , Figure 6 and Figure 9 As shown, the heat exchange device 30 is mounted on the second support section 12, and the heat exchange device 30 is positioned on the side closest to the receiving space 130 (e.g., Figure 9 The upper surface shown is adjacent to the side of the first support section 11 near the receiving space 130 (e.g., the upper side). Figure 9The upper surface shown is flush with the heat exchange device 30, meaning the thickness of the heat exchange device 30 is approximately the same as the depth of the receiving groove 121. This ensures that the heat exchange tube 31 of the heat exchange device 30 can directly contact the battery cell 200, enabling cooling or heating of the battery cell 200 and ensuring heat exchange efficiency to a certain extent. It also allows the heat exchange device 30 to cooperate with the first support section 11 to jointly support the battery cell 200, reducing stress concentration and improving the support effect on the battery cell 200. At the same time, it prevents the heat exchange tube 31 of the heat exchange device 30 from protruding from the outer surface of the first support section 11, reducing space occupation and ensuring the energy density of the battery device 1000.

[0080] Therefore, by placing the heat exchange device 30 on the second support section 12 and making the heat exchange device 30 flush with the first support section 11, it is possible to ensure that the heat exchange device 30 is in direct contact with the battery cell 200, thus ensuring the heat exchange effect on the battery cell 200. Furthermore, the heat exchange device 30 and the first support section 11 can cooperate to jointly support the battery cell 200, which can reduce stress concentration and improve the support effect on the battery cell 200. At the same time, it can prevent the heat exchange device 30 from protruding from the outer surface of the first support section 11, thereby reducing the space occupied by the battery device 1000 and ensuring the energy density of the battery device 1000.

[0081] like Figure 3 , Figure 4 and Figure 9 As shown, in some embodiments, the surface of the heat exchange tube 31 near the receiving space 130 is coated with an insulating layer 50.

[0082] like Figure 3 and Figure 9 As shown, the heat exchange tube 31 of the heat exchange device 30 can be directly connected to the base plate 10. For example, the heat exchange tube 31 can be installed into the receiving groove 121 of the base plate 10 by means of plug-in bonding, which is convenient for disassembly and maintenance. The heat exchange tube 31 can also be integrally formed with the base plate 10, which can ensure the structural strength of the base plate 10 and ensure the protection performance of the heat exchange device 30 and the battery cell 200.

[0083] like Figure 3 As shown, the heat exchange tube 31 is located on the side near the accommodating space 130 (e.g., Figure 3 The upper surface shown is coated with an insulating layer 50, which can achieve insulation between the heat exchange device 30 and the battery cell 200, reduce the probability of leakage of the battery device 1000, and ensure the safety of the battery device 1000.

[0084] The insulating layer 50 can be a ceramic-based insulating coating such as alumina, aluminum nitride, or magnesium oxide, which can improve the thermal conductivity of the insulating layer 50 and ensure the heat exchange effect of the heat exchange device 30 on the battery cell 200. The insulating layer 50 can also be a polymer coating such as epoxy resin or polyurethane, or a silicon-based material such as organosilicon resin, which can improve the service life of the insulating layer 50, facilitate maintenance, and improve the impact resistance of the insulating layer 50, thereby improving the protection performance of the battery cell 200.

[0085] Therefore, by providing an insulating layer 50 on the surface of the heat exchange tube 31, insulation between the heat exchange tube 31 and the battery cell 200 can be achieved, which can reduce the probability of leakage of the battery device 1000 and ensure the safety of the battery device 1000.

[0086] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the heat exchange tube 31 is bonded to the base plate 10 by a colloid 40, and the side surface of the colloid 40 near the receiving space 130 is flush with the side surface of the first support section 11 near the receiving space 130.

[0087] like Figure 3 and Figure 6 As shown, the heat exchange tube 31 is bonded to the base plate 10 via the colloid 40, which ensures the stability of the connection between the heat exchange tube 31 and the base plate 10 and facilitates operation. The colloid 40 is made of epoxy resin structural adhesive, polyurethane structural adhesive, or silicone structural adhesive, which can improve the impact resistance of the colloid 40, extend its service life, and improve the reliability and stability of the bonding between the heat exchange tube 31 and the base plate 10. This prevents the heat exchange tube 31 from detaching from the base plate 10 under various operating conditions of the battery device 1000. At the same time, it can improve the insulation of the colloid 40, achieve insulation between the heat exchange device 30 and the battery cell 200, reduce the probability of leakage of the battery device 1000, and ensure the safety of the battery device 1000.

[0088] like Figure 3 , Figure 6 and Figure 9 As shown, the heat exchange tube 31 is placed in the receiving groove 121, and the receiving groove 121 is filled with colloid 40. This can increase the contact area between the heat exchange tube 31 and the colloid 40, and also increase the contact area between the base plate 10 and the colloid 40. This can improve the reliability and stability of the bonding between the heat exchange tube 31 and the base plate 10 through the colloid 40, and improve the connection effect between the heat exchange tube 31 and the base plate 10.

[0089] like Figure 6 As shown, the side of colloid 40 closest to the receiving space 130 (e.g.) Figure 6The upper surface shown is similar to the surface of the first support section 11 near the receiving space 130. Figure 6 The upper side shown is flush with the colloid 40, meaning the thickness of the colloid 40 is approximately the same as the depth of the receiving groove 121, allowing the colloid 40 to contact the battery cell 200. This enables the colloid 40 to cooperate with the first support section 11 to jointly support the battery cell 200, improving the support effect on the battery cell 200. At the same time, it prevents the colloid 40 from protruding from the outer surface of the first support section 11, reducing the space occupied inside the battery device 1000 and ensuring the energy density of the battery device 1000.

[0090] Therefore, by setting the colloid 40 flush with the surface of the first support section 11 to bond the heat exchange tube 31 to the base plate 10, the connection effect between the heat exchange tube 31 and the base plate 10 can be improved. The colloid 40 can also cooperate with the first support section 11 to jointly support the battery cell 200, thereby improving the support effect on the battery cell 200. At the same time, it can prevent the colloid 40 from protruding from the outer surface of the first support section 11, thereby reducing the space occupied inside the battery device 1000 and ensuring the energy density of the battery device 1000.

[0091] like Figure 3 , Figure 5 and Figure 6 As shown, in some embodiments, the battery device 1000 further includes an insulating layer 50, which is disposed on the side surface of the heat exchange tube 31, the colloid 40 and the first support section 11 near the receiving space 130.

[0092] like Figure 6 As shown, the insulating layer 50 is disposed on the side of the heat exchange tube 31, the colloid 40, and the first support section 11 near the receiving space 130 (e.g., Figure 6 The upper surface shown can achieve insulation between the heat exchange device 30 and the battery cell 200, which can reduce the probability of leakage of the battery device 1000 and ensure the safety of the battery device 1000.

[0093] The insulating layer 50 can be a ceramic-based insulating coating such as alumina, aluminum nitride, or magnesium oxide, which can improve the thermal conductivity of the insulating layer 50 and ensure the heat exchange effect of the heat exchange device 30 on the battery cell 200. The insulating layer 50 can also be a polymer coating such as epoxy resin or polyurethane, or a silicon-based material such as organosilicon resin, which can improve the service life of the insulating layer 50, facilitate maintenance, and improve the impact resistance of the insulating layer 50, thereby improving the protection performance of the battery cell 200.

[0094] Therefore, by providing an insulating layer 50 on the surface of the heat exchange tube 31, the colloid 40 and the first support section 11, insulation between the heat exchange tube 31 and the battery cell 200 can be achieved, and the insulation area between the heat exchange tube 31 and the battery cell 200 can be increased, thereby improving the insulation effect on the battery cell 200, reducing the probability of leakage of the battery device 1000, and ensuring the safety of the battery device 1000 in use.

[0095] like Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 10 As shown, according to some embodiments of this application, the battery box 100 further includes: an outer frame 20, the outer frame 20 being disposed on the outer periphery of the base plate 10, the inner periphery of the outer frame 20 having a support plate 21, and the base plate 10 being adapted to overlap the support plate 21 and be connected to the support plate 21.

[0096] like Figure 3 , Figure 6 and Figure 8 As shown, the outer frame 20 surrounds the outer periphery of the base plate 10. The outer frame 20 and the base plate 10 cooperate to define the accommodating space 130. The inner periphery of the outer frame 20 has a support plate 21. The first support section 11 of the base plate 10 can overlap the support plate 21 and is connected to the support plate 21. This enables the outer frame 20 to support the base plate 10 and increases the contact area between the base plate 10 and the outer frame 20, thereby improving the stability of the connection between the base plate 10 and the outer frame 20 and improving the sealing performance of the battery device 1000.

[0097] Therefore, by providing a support plate 21 on the inner periphery of the outer frame 20 so that the bottom plate 10 is connected to the outer frame 20 through the support plate 21, the contact area between the bottom plate 10 and the outer frame 20 can be increased, thereby improving the stability of the connection between the bottom plate 10 and the outer frame 20 and improving the sealing performance of the battery device 1000.

[0098] like Figure 7 and Figure 8 As shown, in some embodiments, the base plate 10 is bonded to the support plate 21; and / or, the base plate 10 is riveted to the support plate 21; and / or, the base plate 10 is welded to the support plate 21.

[0099] The base plate 10 can be bonded to the support plate 21, which can reduce local stress concentration and ensure the connection effect between the base plate 10 and the support plate 21. For example, the base plate 10 can be bonded to the support plate 21 through the sealing ring 70, which can improve the sealing performance at the connection between the base plate 10 and the support plate 21. Alternatively, the base plate 10 can be riveted to the support plate 21, which can improve the reliability and stability of the connection between the base plate 10 and the support plate 21 and facilitate operation. Or, the base plate 10 can be welded to the support plate 21, which can improve the structural strength at the connection between the base plate 10 and the support plate 21.

[0100] Among them, such as Figure 8 As shown, the base plate 10 can be connected to the support plate 21 by riveting and spot welding. For example, the operator first presses the rivet 60 through the support plate 21 (such as an aluminum plate) of the outer frame 20 until the rivet 60 contacts the first support section 11 (such as a steel plate) of the base plate 10. Then the operator uses spot welding equipment to connect the rivet 60 and the first support section 11 of the base plate 10 into one piece. This can improve the reliability and stability of the connection between the base plate 10 and the support plate 21, ensure the structural strength of the connection between the base plate 10 and the support plate 21, and facilitate operation.

[0101] Of course, in addition to the connection between the base plate 10 and the support plate 21 by riveting and spot welding, the base plate 10 can also be bonded to the support plate 21 by a sealing ring 70. For example, the sealing ring 70 can be a structural adhesive such as epoxy resin structural adhesive, polyurethane structural adhesive or silicone structural adhesive, which can improve the sealing performance at the connection between the base plate 10 and the support plate 21.

[0102] Therefore, the base plate 10 can be connected to the support plate 21 by riveting, welding and bonding, which can improve the reliability and stability of the connection between the base plate 10 and the support plate 21, ensure the structural strength of the connection between the base plate 10 and the support plate 21, facilitate operation, and improve the sealing of the connection between the base plate 10 and the support plate 21.

[0103] like Figure 9 As shown, according to some embodiments of this application, the base plate 10 is a stamped part.

[0104] like Figure 9 As shown, the base plate 10 can be integrally stamped to stamp out the first support section 11 and the second support section 12, and the base plate 10 can be integrally stamped to stamp out the receiving groove 121 located on the second support section 12, which can ensure the structural strength of the base plate 10 and facilitate processing.

[0105] Therefore, by using a stamped base plate 10, the structural strength of the base plate 10 can be guaranteed, the protective performance of the base plate 10 on the heat exchange device 30 and the battery cell 200 can be guaranteed, and it is easy to process.

[0106] According to some embodiments of this application, the base plate 10 is a steel plate.

[0107] The base plate 10 is a metal part, which can improve the structural strength of the base plate 10. For example, the base plate 10 can be a steel plate, which helps to reduce costs while ensuring the structural strength of the base plate 10.

[0108] Therefore, using a steel plate as the base plate 10 can ensure the structural strength of the base plate 10 and reduce costs.

[0109] like Figure 3 and Figure 4 As shown, according to some embodiments of this application, the heat exchange device 30 further includes a heat exchange joint 32, at least a portion of which is disposed within the accommodating space 130. The heat exchange joint 32 connects both ends of the heat exchange tube 31 and defines an inlet chamber and an outlet chamber that communicate with the flow channel 312 of the heat exchange tube 31.

[0110] like Figure 3 and Figure 4 As shown, the heat exchange joint 32 is entirely located within the accommodating space 130, or a portion of the heat exchange joint 32 is located within the accommodating space 130. The heat exchange joint 32 is used to connect the two ends of the heat exchange tube 31, and the heat exchange joint 32 defines an inlet chamber and an outlet chamber. The inlet chamber and the outlet chamber are respectively connected to the heat exchange tube 31 so that the heat exchange medium can be introduced into and circulated in the heat exchange tube 31.

[0111] Therefore, by using heat exchange joint 32 to connect heat exchange tube 31, heat exchange medium can be introduced into and circulated into heat exchange tube 31, which can improve the heat exchange effect.

[0112] like Figure 3 and Figure 4 As shown, according to some embodiments of this application, the heat exchange tube 31 includes multiple tube segments 311, which are connected in sequence, and the extension directions of two adjacent tube segments 311 are different.

[0113] like Figure 3 and Figure 4 As shown, the heat exchange tube 31 is composed of multiple tubes with different extension directions. Two adjacent tubes are arranged vertically in the horizontal plane, or two adjacent tubes can be arranged at a certain angle. Multiple tubes can form a square structure, a loop structure, or a Z-shaped structure.

[0114] Therefore, by setting up multiple pipelines, on the one hand, the length of the heat exchange tube 31 is increased, the contact area with the battery cell 200 is increased, and the heat exchange effect is improved. On the other hand, by setting up multiple pipelines with different extension directions, the contact area between the heat exchange tube 31 and the base plate 10 can be increased, the reliability of the connection can be increased, and the stability of the entire battery device 1000 can be improved.

[0115] like Figure 3, Figure 4 and Figure 6 As shown, according to some embodiments of this application, a partition 3121 is provided inside the heat exchange tube 31. The partition 3121 extends along the extension direction of the heat exchange tube 31 to divide the flow channel 312 inside the heat exchange tube 31 into a plurality of sub-flow channels 3122.

[0116] like Figure 6 As shown, the heat exchange tube 31 is provided with multiple partitions 3121. The dimensions of the multiple partitions 3121 can be the same or different, thereby dividing into sub-channels 3122 of equal or multiple sizes. The multiple sub-channels 3122 can be connected to each other at their ends, or they can be connected to the liquid inlet chamber and the liquid outlet chamber respectively. That is, the connection form of the multiple sub-channels 3122 is not limited.

[0117] Therefore, by setting multiple partitions 3121 inside the heat exchange tube 31, on the one hand, the structural strength of the heat exchange tube 31 can be increased and its service life can be improved; on the other hand, the contact area between the heat exchange medium and the tube wall can be increased, thereby improving the heat transfer efficiency. Moreover, each sub-channel 3122 can be used as an independent heat exchange unit, which helps to distribute heat more evenly.

[0118] Secondly, this application provides an electrical device 2000, which includes the battery device 1000 in the above embodiments, the battery device 1000 being used to provide electrical energy. Therefore, by employing the battery device 1000, the cost and weight of the electrical device 2000 can be reduced.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, include: A battery housing having a receiving space for accommodating individual battery cells, the battery housing including a base plate, the base plate being a metal piece and a portion of the base plate being bent away from the receiving space to form a receiving groove communicating with the receiving space on the side of the base plate near the receiving space; A heat exchange device, the heat exchange device including heat exchange tubes, the heat exchange tubes being disposed within the receiving tank.

2. The battery device according to claim 1, characterized by The base plate includes a first support section and a second support section. The second support section defines the receiving groove. The first support section is located on the outer periphery of the second support section. The surface of the heat exchange device near the receiving space is flush with the surface of the first support section near the receiving space.

3. The battery device of claim 2, wherein, The surface of the heat exchange tube near the receiving space is coated with an insulating layer.

4. The battery device of claim 2, wherein The heat exchange tube is bonded to the base plate by an adhesive, and the side surface of the adhesive near the receiving space is flush with the side surface of the first support section near the receiving space.

5. The battery device of claim 4, wherein Also includes: An insulating layer is disposed on the surface of the heat exchange tube, the colloid, and the first support section near the receiving space.

6. The battery device of claim 1, wherein The battery housing further includes: an outer frame, which is disposed on the outer periphery of the base plate, and a support plate on the inner periphery of the outer frame. The base plate is adapted to overlap the support plate and be connected to the support plate.

7. The battery device of claim 6, wherein The base plate is bonded to the support plate; And / or, the base plate is riveted to the support plate; And / or, the base plate is welded to the support plate.

8. The battery device of claim 1, wherein The base plate is a stamped part.

9. The battery device of claim 1, wherein, The base plate is a steel plate.

10. The battery device of claim 1, wherein The heat exchange device further includes a heat exchange joint, at least a portion of which is disposed within the accommodating space. The heat exchange joint connects both ends of the heat exchange tube and defines an inlet chamber and an outlet chamber that communicate with the flow channel of the heat exchange tube.

11. The battery device of claim 1, wherein The heat exchange tube comprises multiple tube segments connected sequentially, with adjacent tube segments extending in different directions.

12. The battery device of claim 1, wherein, The heat exchange tube is provided with a separator that extends along the extension direction of the heat exchange tube to divide the flow channel inside the heat exchange tube into multiple sub-flow channels.

13. An electrical device, characterized by It includes a battery device according to any one of claims 1-12, the battery device being used to provide electrical energy.

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