Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, and relates to the technical field of batteries, the battery device comprises a box body and a heat exchange plate, a mounting cavity is formed in the box body, and a battery monomer is arranged in the mounting cavity; the heat exchange plate is arranged in the box body corresponding to the single batteries, a plurality of shunt runners arranged in parallel and a confluence runner communicated with the plurality of shunt runners are formed in the heat exchange plate, a damping part is arranged on the inner wall surface of the confluence runner, and the damping part is at least arranged corresponding to the shunt runners. According to the technical scheme provided by the invention, the damping part is arranged in the confluence flow channel, and when the heat exchange liquid flows into the confluence flow channel from the multiple flow dividing flow channels, due to the existence of the damping part, the noise degree generated by the heat exchange liquid at the position can be reduced, and the vehicle using experience of a driver and passengers in a cab is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical appliance. Background Technology

[0002] In existing new energy vehicles, the power battery pack is usually located at the bottom of the vehicle. The heat exchange fluid in the heat exchange plate of the power battery pack usually generates noise during the flow process. This noise is transmitted from the power battery pack to the cabin, affecting the driving experience of the passengers. Utility Model Content

[0003] The main purpose of this application is to propose a battery device and electrical equipment that aims to improve the problem of noise generated by the heat exchange fluid in the heat exchange plate of the power battery pack, thereby affecting the driving experience of the driver and passengers.

[0004] In a first aspect, the battery device proposed in this application includes:

[0005] The housing has a mounting cavity in which a single battery cell is disposed; and,

[0006] A heat exchange plate is disposed in the housing corresponding to the battery cell. The heat exchange plate has a plurality of parallel branch channels and a converging channel communicating with the plurality of branch channels. The inner wall surface of the converging channel is provided with a damping part, and the damping part is provided at least corresponding to the branch channels.

[0007] The technical solution provided in this application involves a heat exchange plate for the battery unit, which is mounted on the housing corresponding to the battery cells. This allows for heat exchange with the battery cells for thermal management. Simultaneously, the heat exchange plate utilizes multiple parallel-connected distribution channels to ensure uniform heat exchange across various parts of the battery cells. Furthermore, a damping section is provided on the inner wall of the confluence channel, which connects to the distribution channels. Even if eddies are generated due to changes in the flow path when the heat exchange fluid flows through the confluence channel, the damping effect of the damping section significantly reduces the noise intensity caused by the eddies impacting and rubbing against the inner wall of the confluence channel. This reduces noise generation at its source, improving the driving experience for passengers. Moreover, because the damping section is located within the confluence channel of the heat exchange plate, it has minimal impact on the volume of the battery unit, ensuring its energy density.

[0008] In some embodiments, the connection points of the plurality of branch channels and the converging channel are located on the same inner wall of the converging channel, and the converging channel has a first inner wall opposite to the plurality of connection points;

[0009] The damping part includes a first damping plate, which is disposed on the first inner wall.

[0010] In this design, by setting a first damping plate on the first inner wall of the confluence channel, the heat exchange liquid in the confluence channel can be separated from the first inner wall of the confluence channel. The eddy current generated by the confluence of the heat exchange liquid impacts the first damping plate, and the first damping plate can use its deformation to offset the impact energy, thereby reducing the intensity of noise generation.

[0011] In some embodiments, the flow channel is provided at the end of the heat exchange plate;

[0012] The battery device also includes a heat exchange joint, which is disposed at the end of the heat exchange plate in the housing and is connected to the manifold.

[0013] Since the confluence channel is located at the end of the heat exchange plate and is directly connected to the heat exchange joint, the heat exchange joint can directly exchange liquid with multiple branch channels through the confluence channel, which ensures the heat exchange uniformity of each local position on the heat exchange plate to the battery cells to the greatest extent.

[0014] In some embodiments, the confluence channel has two opposing second inner walls in the thickness direction of the heat exchange plate;

[0015] At least one of the two second inner walls is provided with a second damping plate;

[0016] The damping section includes the second damping plate.

[0017] In this design, by setting a second damping plate on the second inner wall of the confluence channel, the heat exchange liquid in the confluence channel can be separated from the second inner wall of the confluence channel. When the eddy current generated by the confluence of the heat exchange liquid comes into frictional contact with the second damping plate, the second damping plate can consume the eddy current by its deformation and slow down the flow rate of the heat exchange liquid, thereby reducing the intensity of noise generation.

[0018] In some embodiments, an adhesive is provided between the inner wall surface of the confluence channel and the damping part.

[0019] Since the cross-sectional dimensions of the manifold are generally small, according to the above technical solution, compared with other methods such as threaded connection, the method of bonding the damping part to the inner wall of the manifold with adhesive is simpler and can ensure uniform connection between the various local positions of the damping part and the inner wall of the manifold, thus having less impact on the flow of heat exchange fluid in the manifold.

[0020] In some embodiments, the heat exchange plate includes a heat exchange base plate;

[0021] The housing includes a frame, which is disposed on one side of the heat exchange base plate to enclose and define the mounting cavity.

[0022] In this process, the heat exchange base plate directly participates in forming the mounting cavity. In addition to exchanging heat with the bottom wall of the battery cell, the heat exchange base plate can also support the battery cell. This allows the heat exchange base plate to be made thicker to meet its load-bearing capacity, and the diameter of the branch flow channel and the confluence flow channel can also be made larger, which greatly improves the heat exchange capacity of the heat exchange base plate.

[0023] In some embodiments, the heat exchange plate includes a heat exchange base plate, and a first sound insulation part is provided on the side of the heat exchange base plate facing the battery cell, the first sound insulation part being provided corresponding to the busbar channel.

[0024] The first sound insulation section weakens the noise at the point closest to the confluence channel along the noise propagation path. The first sound insulation section, with its minimum size, achieves a significant external noise reduction effect and has minimal impact on the heat exchange between the heat exchange base plate and the battery cell.

[0025] In some embodiments, the first sound insulation part includes sound insulation cotton or a sound insulation coating.

[0026] Among them, sound insulation cotton or sound insulation coating are both readily available sound insulation materials with low purchase costs, and both can reduce noise to a certain extent.

[0027] In some embodiments, the heat exchange plate includes a heat exchange base plate, and a second sound insulation part is provided on the side of the heat exchange base plate opposite to the battery cell.

[0028] Among them, a second sound insulation part is set on the side of the heat exchange base plate away from the battery cell, which can block and weaken the noise transmitted from the bottom of the vehicle, thereby reducing the intensity of external noise entering the cabin through the battery device.

[0029] Secondly, this application also proposes an electrical device that includes the aforementioned battery device, which is used to provide electrical energy. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0031] Figure 1 A simplified structural diagram of an embodiment of an electrical device provided in this application, which is a vehicle;

[0032] Figure 2An exploded structural diagram of an embodiment of the battery device provided in this application;

[0033] Figure 3 A schematic diagram of the structure of the housing and heat exchange plate in an embodiment of the battery device provided in this application;

[0034] Figure 4 for Figure 3 A top view of the structure of the middle casing and heat exchange plates;

[0035] Figure 5 for Figure 4 Schematic diagram of the structure of section AA;

[0036] Figure 6 for Figure 4 A partial structural schematic diagram of the mid-section AA;

[0037] Figure 7 for Figure 6 A magnified structural diagram of part C in the middle;

[0038] Figure 8 for Figure 3 A front view of the middle casing and heat exchange plates;

[0039] Figure 9 for Figure 8 Schematic diagram of the structure of the mid-section BB;

[0040] Figure 10 for Figure 9 A magnified schematic diagram of the local structure of D.

[0041] Explanation of icon numbers:

[0042] 1000, vehicles;

[0043] 100. Battery assembly; 200. Controller; 300. Motor;

[0044] 1. Housing; 11. Frame; 11a. Mounting cavity; 12. Cover; 2. Battery cell; 3. Heat exchange plate; 31. Heat exchange base plate; 31a. Diverting channel; 31b. Merging channel; 311a. First inner wall; 311b. Second inner wall; 311c. Connecting port; 4. Damping part; 41. First damping plate; 42. Second damping plate; 5. Heat exchange connector; 6. Adhesive; 7. First sound insulation part;

[0045] X, thickness direction.

[0046] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0049] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0050] In this document, the term "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 throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0051] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0052] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0053] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0054] In existing new energy vehicles, the power battery pack is usually located at the bottom of the vehicle. The power battery pack generally exchanges heat with the individual battery cells through heat exchange plates for thermal management. One heat exchange plate usually corresponds to multiple battery cells. To ensure that multiple battery cells can receive uniform heat exchange, the heat exchange channels in the heat exchange plate usually include multiple branch channels and converging channels. Among them, the multiple branch channels are generally arranged in parallel, and the converging channels are connected to the multiple branch channels. During the process of the heat exchange fluid flowing from the branch channels into the converging channels, or from the converging channels into the branch channels, the flow path of the heat exchange fluid changes. The heat exchange fluid usually generates eddies at the converging channels. The eddies collide and rub against the inner wall of the converging channels, thereby generating noise. This noise is transmitted from the power battery pack to the passenger compartment. Excessive noise affects the driving experience of the passengers in the passenger compartment.

[0055] Currently, the common noise reduction method is to install a sound insulation structure (such as sound insulation foam) on the side of the power battery pack closest to the cockpit, that is, at the cover of the power battery pack, so as to reduce noise in the propagation path. However, the installation of the sound insulation structure usually increases the overall volume of the power battery pack, thereby reducing the energy density of the power battery pack, which also has certain drawbacks.

[0056] Analysis of the causes of the above problems reveals that the noise emitted from the heat exchange plate is generated by the impact and friction between the eddies generated by the heat exchange fluid at the confluence channel and the inner wall of the confluence channel. Therefore, it is possible to reduce the noise at the source, that is, to set up corresponding noise reduction or buffer structures in the confluence channel, thereby reducing the intensity of noise generated in the heat exchange plate without reducing the energy density of the power battery pack.

[0057] The battery device disclosed in this application can be used to provide electrical energy to electrical devices, which can be, but are not limited to, electric vehicles, electric cars, ships, spacecraft, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0058] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0059] Please refer to Figure 1 , Figure 1 This application provides a simplified structural diagram of an embodiment of an electrical device used in a vehicle. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is internally installed in the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 controls the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0060] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0061] When the battery device 100 provided in this application is applied to electrical equipment, it can at least improve the problem that the heat exchange fluid in the heat exchange plate of the power battery pack is prone to generating noise, thereby affecting the driving experience of the driver and passengers.

[0062] To facilitate understanding of the battery device 100 provided in this application, the following description is provided in conjunction with the accompanying drawings, wherein... Figure 2 An exploded structural diagram of an embodiment of the battery device provided in this application; Figure 3 A schematic diagram of the structure of the housing and heat exchange plate in an embodiment of the battery device provided in this application; Figure 4 for Figure 3 A top view of the structure of the middle casing and heat exchange plates; Figure 5 for Figure 4 Schematic diagram of the structure of section AA; Figure 6 for Figure 5 A partial structural schematic diagram of the mid-section AA; Figure 7 for Figure 6 A magnified structural diagram of part C in the middle; Figure 8 for Figure 3 A front view of the middle casing and heat exchange plates; Figure 9 for Figure 8 Schematic diagram of the structure of the mid-section BB; Figure 10 for Figure 9 A magnified schematic diagram of the local structure of D.

[0063] Please see Figure 6 , Figure 7 and Figure 9In one embodiment of this application, the battery device 100 includes a housing 1 and a heat exchange plate 3. The housing 1 has a mounting cavity 11a, in which a battery cell 2 is disposed. The heat exchange plate 3 is disposed in the housing 1 corresponding to the battery cell 2. The heat exchange plate 3 has a plurality of parallel-connected branch channels 31a and a converging channel 31b communicating with the plurality of branch channels 31a. The inner wall surface of the converging channel 31b is provided with a damping part 4, and the damping part 4 is provided at least corresponding to the branch channels 31a.

[0064] It should be noted that the housing 1 is the main loading component of the battery device 100. The battery device 100 is installed to the vehicle 1000 through the housing 1, and the battery cells 2 are installed through the mounting cavity 11a of the housing 1. The basic structure of the housing 1 generally includes a housing body and a housing cover. The housing cover is set on the housing body and together with the housing body defines the mounting cavity. Generally speaking, the battery cells are usually set on the housing body. After the battery device 100 is mounted on the vehicle 1000, the housing cover is generally close to the vehicle 1000, and the housing body is generally away from the vehicle 1000. The mounting cavity 11a can be mainly formed in the housing body. In this case, the housing body can be understood as a basin-shaped structure, and the housing cover is set on the housing body to cover the mounting cavity 11a. The mounting cavity 11a can also be mainly formed in the housing cover. In this case, the housing cover can be understood as a cover-shaped structure, and the housing cover is set on the housing body to cover the battery cells mounted on the housing body. Of course, the structure of the housing 1 is not limited to this, and this embodiment does not limit it.

[0065] The battery device 100 typically includes multiple battery cells 2, which can be connected in series, parallel, or in a hybrid configuration. A hybrid configuration means that some battery cells 2 are connected in series while others are connected in parallel. Multiple battery cells 2 can be directly connected in series, parallel, or in a hybrid configuration, and then the entire battery cell 2 is housed within the mounting cavity 11a of the housing 1. Alternatively, multiple battery cells 2 can first be connected in series, parallel, or in a hybrid configuration to form a battery module, and then these modules are connected in series, parallel, or in a hybrid configuration to form the battery cell 2, which is then housed within the mounting cavity 11a of the housing 1. The battery device 100 may also include other structures, such as a busbar component for electrical connection between the multiple battery cells 2 or multiple battery modules. Each battery cell 2 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 2 can be cylindrical, flat, cuboid, or other shapes.

[0066] In the field of new energy batteries, thermal management systems are one of the key technologies for addressing thermal-related issues of battery devices 100 and ensuring their performance, safety, and lifespan. The main functions of thermal management systems include: effectively dissipating heat when the temperature of the battery device 100 rises to prevent thermal runaway accidents; preheating the battery device 100 when the temperature is low to increase the battery temperature and ensure charging and discharging performance and safety at low temperatures; reducing the temperature difference of the individual battery cells 2 inside the battery device 100, suppressing the formation of local hot zones, preventing the battery from degrading too quickly at high-temperature locations, and reducing the overall lifespan of the individual battery cells 2. The current thermal management method involves setting heat exchange plates 3 inside the battery device 100 corresponding to the individual battery cells 2, and connecting the heat exchange plates 3 through an external heat exchange device to exchange heat to cool or heat up the heat exchange fluid flowing back through the heat exchange plates 3.

[0067] In this embodiment, the heat exchange plate 3 can be positioned in various locations. For example, the heat exchange plate 3 can be positioned between two adjacent battery cells 2 or two groups of battery cells 2, so that two or two groups of battery cells 2 can be heat-exchanged simultaneously through one heat exchange plate 3. Of course, the heat exchange plate 3 can also be positioned at the bottom of the battery cells 2, so that multiple battery cells 2 in the mounting cavity 11a can be heat-exchanged simultaneously. In order to ensure the uniformity of heat exchange among multiple battery cells 2, the heat exchange channels in the heat exchange plate 3 are usually designed according to the number and arrangement of the battery cells 2. However, in general, the heat exchange channels include multiple parallel branch channels 31a and a confluence channel 31b communicating with the multiple branch channels 31a. The branch channels 31a and the confluence channel 31b are usually configured to extend in the extension direction of the heat exchange plate 3 (e.g., in the direction of extension). Figure 9 As shown in the figure, the branch flow channel 31a extends in the left-right direction, and the confluence flow channel 31b extends in the up-down direction (where the arrows indicate the flow direction of the heat exchange fluid). Multiple branch flow channels 31a can be located on the same side of the confluence flow channel 31b (e.g., Figure 9 As shown in the figure, the branch channels 31a and the converging channels 31b can also be located on different sides of the converging channel 31b. The branch channels 31a and the converging channels 31b can extend in a straight line or in a curved direction. This embodiment does not limit this. The heat exchange channel formed by the converging channel 31b and multiple branch channels 31a can be arranged in a single layout in the heat exchange plate 3. That is, there can be only one converging channel 31b and multiple branch channels 31a connected to the converging channel 31b in the heat exchange plate 3. The heat exchange channel can also be arranged in a partitioned layout in the heat exchange plate 3. That is, the converging channel 31b and multiple branch channels 31a can be respectively set in various local positions in the heat exchange plate 3. The heat exchange channels in each local position can be connected to the external connector separately, or they can be connected in series, in parallel or in a mixed manner and then connected to the external connector together. This embodiment does not limit this.

[0068] The "damping part 4" is typically made of polymer resin or rubber, possessing stable physical and chemical properties, excellent vibration damping and noise reduction, heat resistance, cold resistance, aging resistance, and strong adhesion. When the damping part 4 is installed in the flow channel 31b, it can eliminate the impact and friction caused by eddies in the heat exchange fluid through its own deformation, thereby achieving vibration damping and noise reduction. Structurally, the damping part 4 can be sheet-like or block-like; this embodiment does not limit this. The damping part 4 can be installed in all the inner sections of the flow channel 31b. The damping part 4 is provided on all the walls. Understandably, this minimizes the noise generated by the heat exchange fluid in the confluence channel 31b. Of course, the damping part 4 can also be provided only on part of the inner wall of the confluence channel 31b, but its position should at least correspond to the interface between the branch channel 31a and the confluence channel 31b (this position is the main location for vortex generation in the heat exchange fluid). In this case, although only part of the inner wall of the confluence channel 31b is provided with the damping part 4, it should still be considered that the provision of the damping part 4 improves the situation of high noise intensity in the confluence channel 31b.

[0069] The technical solution provided in this application involves a heat exchange plate 3 of the battery device 100, which is mounted on the housing 1 corresponding to the battery cell 2. This heat exchange plate 3 can exchange heat with the battery cell 2 for thermal management. Simultaneously, the heat exchange plate 3 ensures uniform heat exchange in various parts of the battery cell 2 through multiple parallel-connected branch channels 31a. Furthermore, a damping part 4 is provided on the inner wall of the confluence channel 31b, which connects to the multiple branch channels 31a. When the heat exchange fluid flows through the confluence channel 31b, even if eddies are generated due to changes in the flow path, the damping buffering effect of the damping part 4 significantly reduces the noise intensity generated by the eddies impacting and rubbing against the inner wall of the confluence channel 31b. This reduces noise generation at the source and improves the driving experience for passengers. Moreover, since the damping part 4 is located in the confluence channel 31b of the heat exchange plate 3, it has minimal impact on the volume of the battery device 100, ensuring the energy density of the battery device 100.

[0070] Please see Figure 7 , Figure 9 and Figure 10 In some embodiments, the connection ports 311c of the multiple branch channels 31a and the confluence channel 31b are located on the same inner wall of the confluence channel 31b, and the confluence channel 31b has a first inner wall 311a opposite to the multiple connection ports 311c; the damping part 4 includes a first damping plate 41, which is disposed on the first inner wall 311a.

[0071] It should be noted that since the branching channel 31a is connected to the converging channel 31b, the branching channel 31a usually has a connecting port 311c on the inner wall of the converging channel 31b. Multiple branching channels 31a correspond to multiple connecting ports 311c. Therefore, "the connecting ports 311c of multiple branching channels 31a and converging channel 31b are located on the same inner wall of the converging channel 31b" means that the multiple connecting ports 311c are located on the inner wall of the same side of the converging channel 31b, and this inner wall can be defined as the connecting inner wall. Therefore, "the converging channel 31b has a first inner wall 311a opposite to the multiple connecting ports 311c" means that the inner wall of the converging channel 31b opposite to the connecting inner wall is set as the first inner wall 311a. For example... Figure 9 As shown in the figure, multiple branch channels 31a extend in the left-right direction and are arranged in the top-bottom direction. A converging channel 31b extends in the top-bottom direction. The converging channel 31b located on the left side of the figure has multiple connecting ports 311c on its right inner wall, which connect to the multiple branch channels 31a. The left side wall of this converging channel 31b is the first inner wall 311a. Figure 10 As shown in the figure; the damping part 4 can be entirely set as the first damping plate 41, or it can include other structures in addition to the first damping plate 41. This embodiment does not limit this. The main problem between the eddy current generated by the heat exchange fluid in the confluence channel 31b and the first inner wall 311a is the impact. The first damping plate 41 is a sheet structure, which is a common form of the damping part 4. The first damping plate 41 is usually attached to the first inner wall 311a. Of course, it is not limited to this. The first damping plate 41 may also be set on the first inner wall 311a by limiting installation, for example, by connecting to the first inner wall 311a with screws.

[0072] According to the above technical solution, by setting a first damping plate 41 on the first inner wall 311a of the confluence channel 31b, it can simultaneously correspond to multiple branch channels 31a and separate the heat exchange liquid in the confluence channel 31b from the first inner wall 311a of the confluence channel 31b. The eddy current generated by the confluence of the heat exchange liquid impacts the first damping plate 41. The first damping plate 41 can use its deformation to offset the impact energy, thereby reducing the intensity of noise generation.

[0073] Please see Figure 6 and Figure 9 In some embodiments, the manifold 31b is disposed at the end of the heat exchange plate 3; the battery device 100 also includes a heat exchange connector 5, which is disposed at the end of the heat exchange plate 3 in the housing 1 and is connected to the manifold 31b.

[0074] It should be noted that since the heat exchange plate 3 is installed on the housing 1 and corresponds to the battery cell 2, "the end of the heat exchange plate 3" can be understood as the end of the heat exchange plate 3 near the housing 1. When the heat exchange plate 3 is located at the bottom of the battery cell 2, the end of the heat exchange plate 3 refers to the end near the side wall of the housing 1 (e.g., Figure 9 As shown, the heat exchange plate 3 has a confluence channel 31b at its left and right ends, and multiple branch channels 31a are located between the two confluence channels 31b at the left and right ends. When the heat exchange plate 3 can be set between two adjacent battery cells 2, the end of the heat exchange plate 3 can be understood as the end near the side wall of the housing 1, or the end near the bottom plate of the housing 1 or the cover 12. The confluence channel 31b is set at the end of the heat exchange plate 3 and is connected to the heat exchange connector 5. Generally, it can be understood that the heat exchange connector 5 is directly connected to the confluence channel 31b. The heat exchange connector 5 usually serves as a transition component for connecting the heat exchange plate 3 to the flow path of the external heat exchange device. It can generally be selected as a quick-connect connector or a threaded screw connector. This embodiment does not limit this. "Heat exchange connector 5" can refer to the heat exchange liquid inlet connector or the heat exchange liquid outlet connector. Of course, the heat exchange connector 5 can also include both the heat exchange liquid inlet connector and the heat exchange liquid outlet connector. This embodiment does not limit this.

[0075] According to the above technical solution, since the confluence channel 31b is located at the end of the heat exchange plate 3 and is directly connected to the heat exchange joint 5, the heat exchange joint 5 can directly exchange liquid with multiple branch channels 31a through the confluence channel 31b, which ensures the heat exchange uniformity of each local position on the heat exchange plate 3 to the battery cell 2 to the greatest extent.

[0076] Please see Figure 6 and Figure 7 In some embodiments, in the thickness direction X of the heat exchange plate 3, the confluence channel 31b has two second inner walls 311b disposed opposite to each other; at least one of the two second inner walls 311b is provided with a second damping plate 42; the damping part 4 includes the second damping plate 42.

[0077] It should be noted that "the thickness direction X of the heat exchange plate 3" can be understood as the direction in which the heat exchange plate 3 faces the battery cell 2. When the heat exchange plate 3 is a heat exchange base plate 31 located at the bottom of the battery cell 2, for example, please refer to [reference needed]. Figure 3"The thickness direction X of the heat exchange plate 3" refers to the height direction of the housing 1. The thickness direction X of the heat exchange plate 3 usually intersects (e.g., is perpendicular) the extension plane of the heat exchange plate 3. Since the second inner wall 311b is located on both sides of the confluence channel 31b along the thickness direction X of the heat exchange plate 3, the eddy current generated by the heat exchange liquid in the confluence channel 31b mainly has friction problems with the second inner wall 311b. The damping part 4 can be set as a whole as the second damping plate 42, or it can include other structures in addition to the second damping plate 42. This embodiment does not limit this. The second damping plate 42 is a sheet structure and is a common form of the damping part 4. "At least one of the two second inner walls 311b is provided with the second damping plate 42" means that the two second inner walls 311b can be provided with the second damping plate 42 respectively, or one of them can be provided with the second damping plate 42. Obviously, it is better to provide the second damping plate 42 on both second inner walls 311b at the same time.

[0078] According to the above technical solution, by providing a second damping plate 42 on the second inner wall 311b of the confluence channel 31b, the heat exchange liquid in the confluence channel 31b can be separated from the second inner wall 311b of the confluence channel 31b. When the eddy current generated by the confluence of the heat exchange liquid comes into frictional contact with the second damping plate 42, the second damping plate 42 can consume the eddy current by its deformation and slow down the flow rate of the heat exchange liquid, thereby reducing the intensity of noise generation.

[0079] The above embodiments do not limit the specific connection method between the damping part 4 and the inner wall surface of the confluence channel 31b. Please refer to [link to relevant documentation]. Figure 6 and Figure 7 In some embodiments, adhesive 6 is provided between the inner wall surface of the confluence channel 31b and the damping part 4.

[0080] It should be noted that "adhesive 6 is provided between the inner wall surface of the manifold 31b and the damping part 4" means that the damping part 4 is bonded to the inner wall surface of the manifold 31b by adhesive 6. The specific composition of adhesive 6 is not limited in this application embodiment, as long as adhesive 6 has certain high temperature resistance and is difficult to react with the heat exchange fluid.

[0081] Since the cross-sectional dimensions of the manifold 31b are generally small, according to the above technical solution, compared with other methods such as threaded connection, the method of bonding the damping part 4 to the inner wall of the manifold 31b by adhesive 6 is simpler and can ensure uniform connection between each local position of the damping part 4 and the inner wall of the manifold 31b, thus having less impact on the flow of heat exchange fluid in the manifold 31b.

[0082] Please see Figure 3 and Figure 5In some embodiments, the heat exchange plate 3 includes a heat exchange base plate 31; the housing 1 includes a frame 11, which is disposed on one side of the heat exchange base plate 31 to enclose and define the mounting cavity 11a.

[0083] It should be noted that the above embodiments describe the possible installation positions of the heat exchange plate 3 in the housing 1. In this embodiment, the heat exchange plate 3 includes a heat exchange base plate 31, which can serve as the base plate of the housing 1 and together with the frame 11 of the housing 1, defines the mounting cavity 11a. It can be understood that the heat exchange base plate 31 corresponds to the bottom of the battery cell 2.

[0084] According to the above technical solution, the heat exchange base plate 31 directly participates in forming the mounting cavity 11a. In addition to exchanging heat with the bottom wall of the battery cell 2, the heat exchange base plate 31 can also support the battery cell 2. This allows the heat exchange base plate 31 to be made thicker to meet its load-bearing capacity. The diameters of the branch flow channel 31a and the confluence flow channel 31b can also be made larger, which greatly improves the heat exchange capacity of the heat exchange base plate 31.

[0085] To address the technical problems raised in the background section, the above embodiments mainly focus on structural design at the noise source to reduce the intensity of noise generation. However, in some embodiments, please refer to... Figure 6 The heat exchange plate 3 includes a heat exchange base plate 31. A first sound insulation part 7 is provided on the side of the heat exchange base plate 31 facing the battery cell 2. The first sound insulation part 7 is provided corresponding to the flow channel 31b.

[0086] It should be noted that the heat exchange base plate 31 in this embodiment is a heat exchange plate located at the bottom of the battery cell 2. This embodiment does not limit whether the heat exchange base plate 31 can serve as the base plate of the housing 1. The heat exchange base plate 31 can also be located between the base plate of the housing 1 and the battery cell 2. "The side of the heat exchange base plate 31 facing the battery cell 2" is the side closer to the cockpit relative to the confluence channel 31b. The propagation path of noise generated in the confluence channel 31b to the cockpit needs to pass through the side of the heat exchange base plate 31 facing the battery cell 2. "The first sound insulation part 7" can generally be understood as a component or structure with sound insulation effect. This embodiment does not limit this. It should be noted that the battery cell can usually not be set at the position of the first sound insulation part 7. For example, the first sound insulation part 7 can be set at a position close to the side wall of the housing.

[0087] According to the above technical solution, by setting the first sound insulation part 7, the noise can be weakened at the position closest to the confluence channel 31b (noise source) on the noise propagation path. By setting the first sound insulation part 7 with the smallest size, a greater degree of external noise reduction effect can be obtained, and the impact on the heat exchange base plate 31 and the battery cell 2 is small.

[0088] In some embodiments, the first sound insulation part 7 includes sound insulation cotton or a sound insulation coating.

[0089] It should be noted that sound insulation cotton can dissipate noise energy through its multiple layers of pores, while sound insulation coating dissipates noise energy by increasing the density of the transmission medium. This embodiment will not elaborate on this aspect.

[0090] According to the above technical solutions, sound insulation cotton or sound insulation coating are both readily available sound insulation materials with low purchase costs, and both can reduce noise to a certain extent.

[0091] In some embodiments, the heat exchange plate 3 includes a heat exchange base plate 31, and a second sound insulation part is provided on the side of the heat exchange base plate 31 away from the battery cell 2.

[0092] It should be noted that the heat exchange base plate 31 in this embodiment is a heat exchange plate located at the bottom of the battery cell 2. This embodiment does not limit whether the heat exchange base plate 31 can serve as the base plate of the housing 1. The heat exchange base plate 31 can also be located between the base plate of the housing 1 and the battery cell 2. The second sound insulation part is not shown in the attached drawings. After the battery device 100 is installed in the vehicle 1000, the "side of the heat exchange base plate 31 away from the battery cell 2" can be understood as the side away from the passenger compartment relative to the confluence channel 31b. The installation space available on this side is larger. The "second sound insulation part" can generally be understood as a component or structure with sound insulation effect. The second sound insulation part can also include sound insulation cotton or sound insulation coating. This embodiment does not limit this.

[0093] According to the above technical solution, a second sound insulation part is provided on the side of the heat exchange base plate 31 away from the battery cell 2, which can block and weaken the noise transmitted from the bottom of the vehicle 1000, thereby reducing the intensity of external noise entering the cabin through the battery device 100.

[0094] This application also proposes an electrical device including a battery device 100 for providing electrical energy. The specific structure of the battery device 100 is as described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here. The battery device 100 is used to provide electrical energy to the electrical device, which includes, but is not limited to, new energy vehicles such as pure electric vehicles, hybrid electric vehicles, and range-extended electric vehicles, and may also include aircraft such as electric drones and electric passenger aircraft.

[0095] This application discloses a battery device 100, which includes a housing 1, battery cells 2, and a heat exchange plate 3. The housing 1 has a mounting cavity 11a, in which the battery cells 2 are disposed. The heat exchange plate 3 is disposed on the housing 1 corresponding to the battery cells 2. The housing 1 includes a frame 11, and the heat exchange plate 3 includes a heat exchange base plate 31. The frame 11 is disposed on one side of the heat exchange base plate 31 to enclose and define the mounting cavity 11a. The battery cells 2 are disposed in the mounting cavity 11a corresponding to the heat exchange base plate 31. The heat exchange base plate 31 has a confluence channel 31b and multiple branch channels formed therein. Multiple branch channels 31a are arranged in parallel on the same side of the converging channel 31b. The converging channel 31b has a first inner wall 311a opposite to the multiple branch channels 31a, and two second inner walls 311b opposite to each other along the thickness direction X of the heat exchange base plate 31. A first damping sheet 41 is connected to the first inner wall 311a by adhesive 6, and a second damping sheet 42 is connected to the second inner wall 311b by adhesive 6. A first sound insulation part 7 is provided on the side of the heat exchange base plate 31 facing the battery cell 2, and the first sound insulation part 7 is provided corresponding to the converging channel 31b.

[0096] In the noise simulation test, noise was measured on the heat exchange base plate 31 of the conventional power battery pack (without a damping part 4 in the confluence channel 31b of the heat exchange base plate 31) and the heat exchange base plate 31 of the battery device 100 in the technical solution of this application (with a damping part 4 in the confluence channel 31b of the heat exchange base plate 31) during the heat exchange process. The noise measured value of the latter was reduced by at least 50% compared with the noise measured value of the former.

[0097] 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 in that, include: The housing has a mounting cavity in which a single battery cell is disposed; and, A heat exchange plate is disposed in the housing corresponding to the battery cell. The heat exchange plate has a plurality of parallel branch channels and a converging channel communicating with the plurality of branch channels. The inner wall surface of the converging channel is provided with a damping part, and the damping part is provided at least corresponding to the branch channels.

2. The battery device as claimed in claim 1, characterized in that, The connection points of the plurality of branch channels and the converging channel are located on the same inner wall of the converging channel, and the converging channel has a first inner wall opposite to the plurality of connection points; The damping part includes a first damping plate, which is disposed on the first inner wall.

3. The battery device as claimed in claim 2, characterized in that, The flow channel is provided at the end of the heat exchange plate; The battery device also includes a heat exchange joint, which is disposed at the end of the heat exchange plate in the housing and is connected to the flow channel.

4. The battery device as claimed in claim 1, characterized in that, In the thickness direction of the heat exchange plate, the confluence channel has two second inner walls that are arranged opposite to each other; At least one of the two second inner walls is provided with a second damping plate; The damping section includes the second damping plate.

5. The battery device as claimed in claim 1, characterized in that, An adhesive is provided between the inner wall of the confluence channel and the damping part.

6. The battery device according to any one of claims 1 to 5, characterized in that, The heat exchange plate includes a heat exchange base plate; The housing includes a frame, which is disposed on one side of the heat exchange base plate to enclose and define the mounting cavity.

7. The battery device according to any one of claims 1 to 5, characterized in that, The heat exchange plate includes a heat exchange base plate, and a first sound insulation part is provided on the side of the heat exchange base plate facing the battery cell. The first sound insulation part is provided corresponding to the busbar channel.

8. The battery device as claimed in claim 7, characterized in that, The first sound insulation part includes sound insulation cotton or sound insulation coating.

9. The battery device according to any one of claims 1 to 5, characterized in that, The heat exchange plate includes a heat exchange base plate, and a second sound insulation part is provided on the side of the heat exchange base plate opposite to the battery cell.

10. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 9, the battery device being used to provide electrical energy.

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