Battery device, electric equipment and battery production line

Abstract

The utility model relates to a battery device, electric equipment and a battery production line. The battery device comprises a heating body, a heat dissipation body and a pad body. The pad body is located between the heating body and the heat dissipation body and comprises a first surface attached to the heating body and a second surface attached to the heat dissipation body. Wherein the first surface has first visual information, and the second surface has second visual information different from the first visual information. The situation that the heat conduction efficiency is reduced due to the fact that the pad body is not tightly attached due to the wrong assembly direction can be reduced, and therefore the service life of the battery device can be prolonged.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to battery devices, electrical equipment, and battery production lines. Background Technology

[0002] The battery device includes a battery, and the electrical energy output by the battery can normally power products such as vehicles.

[0003] In related technologies, improving the lifespan of battery devices is one of the future development directions for battery devices. Utility Model Content

[0004] Therefore, it is necessary to provide a battery device, electrical equipment, and battery production line to address the above technical problems.

[0005] According to a first aspect of this application, a battery device is provided, including a heating element, a heat sink, and a pad. The pad is located between the heating element and the heat sink, and includes a first surface that adheres to the heating element and a second surface that adheres to the heat sink. The first surface has first visual information, and the second surface has second visual information different from the first visual information.

[0006] Based on different first and second visual information, the first and second surfaces can be clearly distinguished, making it easier for the pad to be installed between the heating element and the heat sink in the correct installation direction. This allows the first surface to better fit the heating element and the second surface to better fit the heat sink, reducing the possibility of poor fit due to incorrect assembly direction, which would lead to a decrease in thermal conductivity. This improves the thermal conductivity of the pad and thus extends the lifespan of the battery device.

[0007] In one embodiment, the adhesive force between the first surface and the heating element is greater than the adhesive force between the second surface and the heat sink; or, the adhesive force between the first surface and the heating element is less than the adhesive force between the second surface and the heat sink.

[0008] This allows one of the heating element or the heat sink to be bonded to the pad, thereby reducing the possibility of poor adhesion that could lead to a decrease in thermal conductivity and thus improving the heat conduction effect of the pad. In addition, the adhesion between the other heating element and the pad is relatively small, making it easier to separate the heating element and the heat sink, thus facilitating the maintenance of the heating element.

[0009] In one embodiment, the viscosity of the first surface is greater than that of the second surface; the heating element is a high-voltage box.

[0010] The first surface of the pad can be bonded to one side of the heating element. Since the first and second surfaces have different visual information, it can reduce the situation where the pad and the high-voltage box are not tightly fitted due to incorrect assembly direction, which would lead to a decrease in thermal conductivity. This is beneficial to improving the thermal conductivity of the pad and thus improving the service life of the battery device.

[0011] In one embodiment, the heat sink is a liquid cooling plate. The high-voltage box includes a housing and electrical components, with the electrical components assembled into the housing. The adhesive force between the housing and the first surface is greater than the adhesive force between the liquid cooling plate and the second surface.

[0012] Heat from the electrical components can be transferred to the first surface, and then to the liquid cooling plate through the pad, which can be used to dissipate heat from the electrical components. In addition, the adhesive connection between the housing and the first surface can reduce the decrease in thermal conductivity caused by the poor fit between the pad and the high-voltage box.

[0013] In one embodiment, the high-voltage box further includes an electrical connector; the box body has an opening on one side facing the first surface, at least a portion of the electrical connector is located at the opening, and the first surface seals the opening.

[0014] This application places at least a portion of the electrical connector at the opening, and the first surface seals the opening. This allows the portion of the electrical connector at the opening to contact the first surface, facilitating the transfer of heat from the electrical connector to the heat sink using a pad, thereby effectively dissipating heat from the high-voltage box and improving the service life of the high-voltage box and battery device.

[0015] In one embodiment, the high-voltage box further includes a reinforcing structure connected to the box body.

[0016] The strength of the box can be improved by using a reinforced structure, so that the heating element has a certain rigidity. This reduces the possibility of excessive deformation of the interface of the heating element near the pad during vibration. This reduces the problem of the pad thickness decreasing or gaps forming between the pad and the interface due to excessive interface deformation. This reduces the increase in interface thermal resistance caused by gaps, thereby improving the heat dissipation efficiency and reliability of the high-voltage box.

[0017] In one embodiment, the reinforcing structure includes a first reinforcing part and a second reinforcing part. The first reinforcing part is connected to the side of the box body away from the pad body; the second reinforcing part is connected to the side of the box body close to the pad body; the second reinforcing part is spaced apart from the pad body.

[0018] This can better improve the strength of the box body and reduce the excessive deformation of the interface of the high voltage box near the pad during vibration. This reduces the problem of the pad thickness decreasing or gaps forming between the pad and the interface due to excessive interface deformation, thereby reducing the increase in interface thermal resistance caused by gaps. This can improve the heat dissipation efficiency and reliability of the high voltage box.

[0019] In one embodiment, the reinforcing structure and the box body are integrally formed.

[0020] This improves the overall integrity and strength of the high-voltage box, thereby enhancing its heat dissipation efficiency and reliability.

[0021] In one embodiment, the high-voltage box further includes an electrical connector, the orthographic projection of which overlaps with the orthographic projection of the pad in the target plane; the target plane is perpendicular to a first direction, and the first direction is parallel to the thickness direction of the pad.

[0022] By ensuring that the orthographic projection of the electrical connector in the target plane overlaps with the orthographic projection of the pad in the target plane, the pad can be positioned to correspond to the electrical components, thereby effectively utilizing the pad to transfer the heat of the high-voltage box outward.

[0023] In one embodiment, the pad includes a first sub-pad and a second sub-pad stacked together; a first surface is formed on the side of the first sub-pad away from the second sub-pad; and a second surface is formed on the side of the second sub-pad away from the first sub-pad.

[0024] Based on different first and second visual information, the first and second sub-pads can be clearly distinguished, making it easier to install the pads between the heating element and the heat sink in the correct installation direction. That is, the first sub-pad is located on one side of the heating element, and the second sub-pad is located on the side of the first sub-pad away from the heating element. In this way, the situation where the pads are not tightly fitted due to incorrect assembly direction, which leads to a decrease in thermal conductivity, can be reduced. This is beneficial to improving the thermal conductivity of the pads and thus improving the service life of the battery device.

[0025] In one embodiment, the first surface and the side surface of the first sub-pad near the second sub-pad both have first visual information; and / or, the second surface and the side surface of the second sub-pad near the first sub-pad both have second visual information.

[0026] This makes it easier to distinguish between the first and second sub-pads, and can better reduce the situation where the pads are not tightly fitted due to incorrect assembly direction, thus reducing the thermal conductivity.

[0027] In one embodiment, the first sub-pad body and the second sub-pad body are bonded together.

[0028] This improves the connection strength between the first and second sub-pads, thereby enhancing the overall integrity and reliability of the pads.

[0029] In one embodiment, the first sub-pad includes a third surface connected to the second sub-pad; the adhesiveness of the first surface and the third surface are both greater than the adhesiveness of the second surface.

[0030] This improves the adhesion between the pad and the heating element, reducing the likelihood of insufficient bonding between the heating element and the pad, which could lead to a decrease in thermal conductivity.

[0031] In one embodiment, the second sub-pad includes a fourth surface connected to the first sub-pad; the adhesiveness of the fourth surface is greater than or equal to the adhesiveness of the second surface.

[0032] On the one hand, the second surface is the side of the pad away from the heating element, so there is no requirement for viscosity, and the pad can be made viscous on one side. On the other hand, by making the viscosity of the second surface less than that of the first surface, or even less than that of the fourth surface, there is no need to add materials such as insulating films to the second surface to reduce viscosity. The thermal resistance of the pad will not increase due to materials such as insulating films, which is conducive to improving the overall thermal conductivity of the interface where the second surface is located.

[0033] In one embodiment, the viscosity of the first sub-pad is greater than or equal to that of the second sub-pad.

[0034] On the one hand, it can improve the adhesion between the first sub-pad and the heating element, reducing the possibility of insufficient adhesion between the heating element and the pad, which could lead to a decrease in thermal conductivity. On the other hand, the material of the first sub-pad can be selected more based on adhesion requirements, and the material of the second sub-pad can be selected more based on thermal conductivity requirements, thereby improving the heat dissipation effect of the battery device.

[0035] In one embodiment, a first gap is formed between the heating element and the heat dissipation element along a first direction, and the pad is disposed within the first gap with an interference fit.

[0036] Since the pad is interference-fitted within the first gap, it is understood that the thickness of the pad is greater than the dimension of the first gap in the first direction. This allows the pad to maintain good contact with the heat-generating element even under interface tolerances and deformation, thereby reducing the increase in interface thermal resistance due to gap issues and improving the heat dissipation efficiency and reliability of the battery device.

[0037] In one embodiment, the heating element and the heat sink are detachably connected along a first direction.

[0038] It facilitates the disassembly and assembly of the heating element and the heat sink, and also allows the pad to be stably clamped between the heating element and the heat sink, thereby improving the heat dissipation effect and reliability of the battery device.

[0039] In one embodiment, the heating element includes a plurality of first connecting portions; the heat sink includes a plurality of second connecting portions corresponding to the plurality of first connecting portions; the first connecting portions and the corresponding second connecting portions are detachably connected; the plurality of second connecting portions are arranged at intervals around the pad.

[0040] Since the first connecting part is detachably connected to the corresponding second connecting part, and multiple second connecting parts are arranged at intervals around the pad, the pad can be more stably sandwiched between the heating element and the heat dissipation element, thereby improving the heat dissipation effect and reliability of the battery device.

[0041] In one embodiment, the battery device further includes a support member and an elastic layer. Along a first direction, the support member is disposed on the side of the heat sink away from the pad; along the first direction, the elastic layer is disposed between the heat sink and the support member.

[0042] The elastic layer can absorb interface deformation, which helps to improve the fit between the pad and the heat sink, thereby reducing the increase in interface thermal resistance caused by gap problems, and thus improving the heat dissipation efficiency and reliability of the battery device.

[0043] In one embodiment, a second gap is provided between the heat sink and the support member along the first direction, and an elastic layer is disposed within the second gap with an interference fit.

[0044] It is understandable that the thickness of the elastic layer is greater than the size of the second gap in the first direction. In this way, under the condition of interface tolerance and / or interface deformation, the elastic layer can absorb the interface deformation, so that the heat sink can fit well with the pad. This can reduce the increase in interface thermal resistance caused by gap problems, thereby improving the heat dissipation efficiency and reliability of the battery device.

[0045] In one embodiment, the heat sink and the support are detachably connected along a first direction.

[0046] This facilitates the disassembly and assembly of the heat sink and support components, and also allows the elastic layer to be stably sandwiched between the heat sink and support components, thereby improving the heat dissipation effect and reliability of the battery device.

[0047] According to a second aspect of this application, an electrical device is provided, including the battery device of any of the above embodiments.

[0048] According to a third aspect of this application, a battery production line is provided for the production of battery devices according to any of the above embodiments. The battery production line includes a vision system for confirming whether a pad is mounted on one side of a heating element in a first orientation; when the pad is in the first orientation, along a first direction, a first surface is positioned closer to the heating element than a second surface.

[0049] 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

[0050] 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:

[0051] Figure 1 A schematic diagram of the structure of a vehicle according to an embodiment of this application is shown.

[0052] Figure 2 A schematic diagram of the structure of the heating element, heat sink, and pad in one embodiment of this application is shown (in... Figure 2 (The pad is obscured and not shown).

[0053] Figure 3 An exploded view of the heating element, heat sink, and pad in one embodiment of this application is shown.

[0054] Figure 4 A schematic diagram of the structure of a heating element in one embodiment of this application is shown from a single viewpoint.

[0055] Figure 5 A schematic diagram of the heating element in one embodiment of this application is shown from another perspective.

[0056] Figure 6 A schematic diagram of the structure of the pad in one embodiment of this application is shown.

[0057] Figure 7 An exploded schematic diagram of a cushion body according to an embodiment of this application is shown.

[0058] Figure 8 A cross-sectional view of the heating element, heat sink, and pad is shown in another embodiment of this application.

[0059] Figure 9A schematic diagram of the structure of the heating element, heat sink, pad, support member, and elastic layer in another embodiment of this application is shown (in...). Figure 9 (In the middle, the pad and elastic layer are obscured and are not shown).

[0060] Figure 10 An exploded view of the heating element, heat sink, pad, support, and elastic layer in another embodiment of this application is shown.

[0061] Figure 11 A cross-sectional view of the heating element, heat sink, pad, support, and elastic layer in another embodiment of this application is shown.

[0062] Reference numerals: 1. Vehicle; 10. Battery assembly; 100. Heating element; 110. Housing; 111. First connecting part; K. Opening; 120. Electrical connector; 130. Reinforcing structure; 131. First reinforcing part; 132. Second reinforcing part; 200. Heat sink; 210. Second connecting part; 220. Plate; 230. Pipeline; 300. Pad; 310. First sub-pad; 320. Second sub-pad; 311. First surface; 321. Second surface; 312. Third surface; 322. Fourth surface; 400. Support member; 410. Third connecting part; 500. Elastic layer; 600. First connector; J1. First gap; J2. Second gap; 20. Motor; 30. Controller. Detailed Implementation

[0063] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0064] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0065] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0067] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0068] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0069] In related technologies, improving the lifespan of battery devices is one of the future development directions for battery devices.

[0070] To improve the service life of battery devices, this application designs a battery device, electrical equipment, and battery production line that enables the pad to be installed in the correct assembly direction between the heating element and the heat sink. This reduces the possibility of the pad not fitting tightly due to incorrect assembly direction, which would lead to a decrease in thermal conductivity and thus improve the service life of the battery device.

[0071] The battery device disclosed in this application can be used, but is not limited to, in electrical equipment such as vehicles, ships, or aircraft. Electrical equipment can include, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, and spacecraft. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. The power system of this electrical equipment can be composed using the battery device disclosed in this application, which facilitates providing power to the equipment and also improves its service life.

[0072] Figure 1 This illustration shows a structural diagram of a vehicle 1 according to an embodiment of this application. Vehicle 1 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 10 is installed inside vehicle 1. For example, the battery device 10 can be installed at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1. For example, the battery device 10 can serve as the operating power source for vehicle 1's electrical system, such as meeting the power requirements for starting, navigation, and operation of vehicle 1. In another embodiment of this application, the battery device 10 can not only serve as the operating power source for vehicle 1 but also as the driving power source for vehicle 1, replacing or partially replacing gasoline or natural gas to provide driving force for vehicle 1.

[0073] The interior of vehicle 1 may also be equipped with a motor 20 and a controller 30. The controller 30 is used to control the power supply of the battery device 10 to the motor 20, for example, for the power needs of vehicle 1 during starting, navigation and driving.

[0074] Figure 2 A schematic diagram of the structure of the heating element, heat sink, and pad in one embodiment of this application is shown (in... Figure 2 (The pad is obscured and not shown). Figure 3 An exploded view of the heating element, heat sink, and pad in one embodiment of this application is shown.

[0075] One embodiment of this application provides a battery device 10, including a heating element 100, a heat sink 200, and a pad 300.

[0076] Please refer to the following: Figure 2 and Figure 3 The pad 300 is located between the heating element 100 and the heat sink 200. Specifically, it can be located along a first direction F1, with the pad 300 positioned between the heating element 100 and the heat sink 200. The first direction F1 is parallel to the thickness direction of the pad 300.

[0077] The heating element 100 refers to the part of the battery device 10 that generates heat during use. The heating element 100 can be a battery or a high-voltage box.

[0078] Heat sink 200 refers to the part of the battery device 10 used to dissipate heat from the heat sink 100.

[0079] The pad 300 refers to the part of the battery device 10 that is disposed between the heating element 100 and the heat sink 200. The pad 300 is used to transfer the heat generated by the heating element 100 to the heat sink 200.

[0080] The pad 300 includes a first surface 311 that is in contact with the heat source 100 and a second surface 321 that is in contact with the heat sink 200. The first surface 311 has first visual information, and the second surface 321 has second visual information that is different from the first visual information.

[0081] The first surface 311 refers to the side surface of the pad 300 that is used to contact the heating element 100.

[0082] The second surface 321 refers to the side surface of the pad 300 that is used to adhere to the heat sink 200.

[0083] The first visual information refers to the information obtained through visual perception on the first surface 311, and the first visual information may include at least one of color, pixel and pattern.

[0084] The second visual information refers to information obtained through visual perception on the second surface 321, and the second visual information may include at least one of color, pixel and pattern.

[0085] For example, the first visual information includes the color of the first surface 311 or the first surface 311 being colorless. The second visual information includes the color of the second surface 321.

[0086] It is understood that the material or structure of the first surface 311 can be designed according to the heating element 100, and the material or structure of the second surface 321 can be designed according to the heat sink 200. In this way, based on different first and second visual information, the first surface 311 and the second surface 321 can be intuitively distinguished, which makes it easier for the pad 300 to be set between the heating element 100 and the heat sink 200 in the correct installation direction. This allows the first surface 311 to fit better with the heating element 100 and the second surface 321 to fit better with the heat sink 200. This reduces the possibility of the pad 300 not fitting tightly due to incorrect assembly direction, which would lead to a decrease in thermal conductivity. This is beneficial to improving the thermal conductivity of the pad 300, thereby improving the service life of the battery device 10.

[0087] In some embodiments, the adhesive force between the first surface 311 and the heating element 100 is greater than the adhesive force between the second surface 321 and the heat sink 200.

[0088] Normally, the heating element 100 and the heat sink 200 are not adhesive. Therefore, the adhesiveness of the first surface 311 may be greater than that of the second surface 321, so that the adhesive force between the first surface 311 and the heating element 100 is greater than that between the second surface 321 and the heat sink 200.

[0089] The relationship between the adhesiveness of the first surface 311 and the second surface 321 can be determined through shear tests or peel strength tests. For example, the adhesiveness of the first surface 311 and the second surface 321 can be tested separately using a peel force test. During the test, the pad 300 is laid flat on the substrate, and a certain force is applied to the pad 300 to peel it off using a peel strength tester. By measuring the required force, the peel strength of the first surface 311 and the peel strength of the second surface 321 of the pad 300 can be tested separately, thereby characterizing the adhesiveness of the first surface 311 and the second surface 321, and determining the relationship between the adhesiveness of the first surface 311 and the second surface 321. Here, peel strength can also be called peel force, which refers to the force required to peel the pad 300 from the substrate by a unit length.

[0090] The peel strength of the first surface 311 and the peel strength of the second surface 321 can both be obtained by taking the average value after a limited number of measurements (the number of measurements can be less than 10).

[0091] The test results showed that the peel strength of the first surface 311 was greater than 0.3 N / cm and less than 10 N / cm, while the peel strength of the second surface 321 was greater than or equal to zero and less than 0.1 N / cm. Therefore, it can be concluded that the adhesiveness of the first surface 311 is greater than that of the second surface 321.

[0092] Of course, this application is not limited to this. In some other embodiments, the adhesive force between the first surface 311 and the heating element 100 is less than the adhesive force between the second surface 321 and the heat sink 200.

[0093] Normally, the heating element 100 and the heat sink 200 are not adhesive. Therefore, the adhesiveness of the first surface 311 may be less than that of the second surface 321, so that the adhesive force between the first surface 311 and the heating element 100 is less than that between the second surface 321 and the heat sink 200.

[0094] Whether the adhesive force between the first surface 311 and the heating element 100 is greater than the adhesive force between the second surface 321 and the heat sink 200, or whether the adhesive force between the first surface 311 and the heating element 100 is less than the adhesive force between the second surface 321 and the heat sink 200, one of the heating element 100 and the heat sink 200 can be bonded to the pad 300, thereby reducing the possibility of the pad 300 not fitting tightly and thus reducing the thermal conductivity, which is beneficial to improving the thermal conductivity of the pad 300. In addition, the smaller adhesive force between the other of the heating element 100 and the heat sink 200 and the pad 300 makes it easier to separate the heating element 100 and the heat sink 200, thus facilitating the maintenance of the heating element 100.

[0095] In some embodiments, the adhesion of the first surface 311 is greater than that of the second surface 321, and the heating element 100 is a high-voltage box.

[0096] The battery device 10 also includes a battery electrically connected to the high-voltage box. The battery is the part of the battery device 10 used to supply power. The high-voltage box is used to safely manage the electrical energy output by the battery and has protection functions such as overcurrent, overvoltage, and overtemperature.

[0097] The high-voltage box can be a high-voltage distribution box, which is used to distribute the high-voltage current output by the battery to high-voltage electrical components such as the drive motor of vehicle 1.

[0098] In this way, the first surface 311 of the pad 300 can be bonded to one side of the heating element 100. Since the first surface 311 and the second surface 321 have different visual information, the situation where the pad 300 and the high voltage box are not tightly fitted due to incorrect assembly direction, which leads to a decrease in thermal conductivity, can be reduced. This is beneficial to improving the thermal conductivity of the pad 300, thereby improving the service life of the battery device 10.

[0099] In some embodiments, the heat sink 200 is a liquid cooling plate, and the high-voltage box includes a box body 110 and electrical components, with the electrical components assembled in the box body 110. The adhesive force between the box body 110 and the first surface 311 is greater than the adhesive force between the liquid cooling plate and the second surface 321.

[0100] Box 110 is equivalent to the outer shell of the high-voltage box.

[0101] Electrical components may include relays (not shown in the figure), etc.

[0102] Along the first direction F1, the first surface 311 of the pad 300 is bonded to one side of the box 110.

[0103] Heat from the electrical components can be transferred to the first surface 311, and then to the liquid cooling plate through the pad 300, which can be used to dissipate heat from the electrical components. In addition, the adhesive connection between the housing 110 and the first surface 311 can reduce the decrease in thermal conductivity caused by the pad 300 not being tightly attached to the high-voltage box.

[0104] In some embodiments, the high-voltage box further includes an electrical connector 120, the box body 110 having an opening K on the side facing the first surface 311, at least a portion of the electrical connector 120 being located at the opening K, and the first surface 311 sealing the opening K.

[0105] It is understood that at least a portion of the electrical connector 120 is exposed through the opening K.

[0106] Electrical connector 120 can be a bar plate.

[0107] The high-voltage current from the battery is transmitted to the high-voltage electrical components of the vehicle 1 through the electrical connector 120 of the high-voltage box and the relay, which causes the electrical connector 120 to have a high temperature.

[0108] Therefore, in this application, at least a portion of the electrical connector 120 is located at the opening K, and the first surface 311 seals the opening K. In this way, the portion of the electrical connector 120 located at the opening K can contact the first surface 311, which facilitates the transfer of heat from the electrical connector 120 to the heat sink 200 by the pad 300, thereby effectively dissipating heat from the high-voltage box and improving the service life of the high-voltage box and the battery device 10.

[0109] In some embodiments, such as Figure 4 and Figure 5 As shown, the high-voltage box also includes a reinforcing structure 130, which is connected to the box body 110.

[0110] The reinforcing structure 130 refers to the components on the high-voltage box that can increase the strength of the box body 110.

[0111] In this way, the strength of the box body 110 can be improved by using the reinforcing structure 130, so that the heating element 100 has a certain rigidity, reducing the excessive deformation of the interface of the heating element 100 near the pad 300 during vibration. This reduces the problem of the pad 300 becoming thinner or gaps forming between the pad 300 and the interface due to excessive interface deformation, thereby reducing the increase in interface thermal resistance due to gap problems, and thus improving the heat dissipation efficiency and reliability of the high-voltage box.

[0112] In some embodiments, the reinforcing structure 130 includes a first reinforcing part 131 and a second reinforcing part 132. The first reinforcing part 131 is connected to the side of the box body 110 away from the pad body 300, and the second reinforcing part 132 is connected to the side of the box body 110 close to the pad body 300. The second reinforcing part 132 is spaced apart from the pad body 300.

[0113] The first reinforcing part 131 refers to the portion of the reinforcing structure 130 located on the side of the box body 110 away from the pad body 300, and the second reinforcing part 132 refers to the portion of the reinforcing structure 130 located on the side of the box body 110 close to the pad body 300.

[0114] Both the first reinforcing part 131 and the second reinforcing part 132 may include ribs protruding from the box body 110.

[0115] The first reinforcing part 131 and the second reinforcing part 132 are respectively provided on the side of the box body 110 away from the pad 300 and on the side of the box body 110 close to the pad 300. This can better improve the strength of the box body 110 and reduce the excessive deformation of the interface of the high voltage box close to the pad 300 during vibration. This reduces the problem of the pad 300 becoming thinner or the gap between the pad 300 and the interface due to excessive interface deformation. This reduces the increase in interface thermal resistance due to gap problems, thereby improving the heat dissipation efficiency and reliability of the high voltage box.

[0116] In addition, the second reinforcing part 132 is spaced apart from the pad 300, which helps the pad 300 to better fit the side surface of the box 110 near the pad 300, thereby reducing the increase in interface thermal resistance due to gap problems, and thus improving the heat dissipation efficiency and reliability of the high voltage box.

[0117] In some embodiments, the reinforcing structure 130 and the box body 110 are integrally formed.

[0118] This improves the overall integrity and strength of the high-voltage box, thereby enhancing its heat dissipation efficiency and reliability.

[0119] In some embodiments, the orthographic projection of the electrical connector 120 in the target plane overlaps with the orthographic projection of the pad 300 in the target plane, and the target plane is perpendicular to the first direction F1.

[0120] By ensuring that the orthographic projection of the electrical connector 120 in the target plane overlaps with the orthographic projection of the pad 300 in the target plane, the pad 300 can be positioned to correspond to the electrical components, thereby effectively utilizing the pad 300 to transfer the heat of the high-voltage box outward.

[0121] In some embodiments, please refer to Figure 6 The pad 300 includes a first sub-pad 310 and a second sub-pad 320 stacked together. A first surface 311 is formed on the side of the first sub-pad 310 away from the second sub-pad 320, and a second surface 321 is formed on the side of the second sub-pad 320 away from the first sub-pad 310.

[0122] Since the pad 300 includes a first sub-pad 310 and a second sub-pad 320 stacked together, the first sub-pad 310 and the second sub-pad 320 can be visually distinguished based on different first and second visual information. This facilitates the installation of the pad 300 between the heat source 100 and the heat sink 200 in the correct installation direction. Specifically, the first sub-pad 310 is located on one side of the heat source 100, and the second sub-pad 320 is located on the side of the first sub-pad 310 away from the heat source 100. This reduces the possibility of the pad 300 not fitting tightly due to incorrect assembly direction, thus reducing the thermal conductivity. This improves the thermal conductivity of the pad 300 and consequently extends the service life of the battery device 10.

[0123] In some embodiments, the first sub-pad 310 refers to a layer on the pad 300 for bonding to the heating element 100. The first sub-pad 310 may be adhesive and may also have thermal conductivity.

[0124] The second sub-pad 320 refers to a layer disposed on the side of the first sub-pad 310 away from the heating element 100 on the pad 300. The second sub-pad 320 mainly has the function of heat conduction.

[0125] In some embodiments, the first surface 311 and the side surface of the first sub-pad 310 closest to the second sub-pad 320 both have first visual information.

[0126] Please see Figure 7 The surface of the first sub-pad 310 closest to the second sub-pad 320 is the third surface 312. In other words, both the first surface 311 and the third surface 312 have first visual information.

[0127] This makes it easier to distinguish between the first sub-pad 310 and the second sub-pad 320, and can better reduce the situation where the pad 300 is not tightly fitted due to incorrect assembly direction, thus reducing the thermal conductivity.

[0128] In some embodiments, the second surface 321 and the side surface of the second sub-pad 320 closest to the first sub-pad 310 both have second visual information.

[0129] Please continue reading. Figure 7 The surface of the second sub-pad 320 closest to the first sub-pad 310 is the fourth surface 322.

[0130] In other words, both the second surface 321 and the fourth surface 322 have second visual information.

[0131] This makes it easier to distinguish between the first sub-pad 310 and the second sub-pad 320, and can better reduce the situation where the pad 300 is not tightly fitted due to incorrect assembly direction, thus reducing the thermal conductivity.

[0132] In some embodiments, the first sub-pad 310 has first visual information and the second sub-pad 320 has second visual information.

[0133] For example, the first visual information includes that the first sub-pad 310 is transparent, and the second visual information includes the color of the second sub-pad 320, which can be gray, orange, or blue, etc. The material of the first sub-pad 310 may include a matrix, and may also include a matrix and a thermally conductive filler; the material of the second sub-pad 320 may include a matrix, a thermally conductive filler, and a pigment. In this way, the first sub-pad 310 can be transparent, and the second sub-pad 320 can have color.

[0134] The matrix can be acrylate. Component A and component B of the acrylate can be stirred and mixed thoroughly before coating to obtain an initial first sub-pad. Alternatively, component A, component B of the acrylate, thermally conductive filler, and pigment can be stirred and mixed thoroughly before coating to obtain an initial second sub-pad. The initial first sub-pad and the initial second sub-pad are then stacked. Finally, film cutting is performed to obtain the pad 300 of this application. The corresponding pad 300 can be film-cut to the required shape, for example, so that the film-cut pad 300 can be adapted to be disposed on the heat sink 200, that is, the multiple second connecting portions 210 of the heat sink 200 can be spaced around the pad 300.

[0135] For example, the first visual information includes the color of the first sub-pad 310, and the second visual information includes the color of the second sub-pad 320. It can be understood that the first visual information and the second visual information refer to different colors. That is to say, the first sub-pad 310 and the second sub-pad 320 have different colors.

[0136] The first sub-pad 310 can be white, and the second sub-pad 320 can be gray, orange, or blue, etc. The material of the first sub-pad 310 may include a matrix and a first pigment; alternatively, the material of the first sub-pad 310 may include a matrix, a thermally conductive filler, and a first pigment. The material of the second sub-pad 320 may include a matrix, a thermally conductive filler, and a second pigment. The matrix can be acrylic ester, and the first and second pigments can be pigments of different colors, as long as the first sub-pad 310 and the second sub-pad 320 have different colors.

[0137] The first sub-pad 310 and the second sub-pad 320 can be set to different colors, so that the first visual information and the second visual information are different; the first sub-pad 310 can be set to a transparent state and the second sub-pad 320 can be set to a colored state, so that the first visual information and the second visual information are different; in this way, it is easy to distinguish the first sub-pad 310 and the second sub-pad 320, so that the pad 300 can be glued to the heating element 100 in the correct installation direction.

[0138] In some embodiments, the first sub-pad 310 and the second sub-pad 320 are bonded together.

[0139] This improves the connection strength between the first sub-pad 310 and the second sub-pad 320, thereby enhancing the overall integrity and reliability of the pad 300.

[0140] In some embodiments, the first sub-pad 310 includes a third surface 312 connected to the second sub-pad 320, wherein the adhesiveness of the first surface 311 and the third surface 312 are both greater than the adhesiveness of the second surface 321.

[0141] It is possible that the overall viscosity of the first sub-pad 310 is greater than the viscosity of the second surface 321.

[0142] This can improve the adhesion between the pad 300 and the heating element 100, and reduce the possibility of poor adhesion between the heating element 100 and the pad 300, which could lead to a decrease in thermal conductivity.

[0143] In some embodiments, the second sub-pad 320 includes a fourth surface 322 connected to the first sub-pad 310, the adhesiveness of the fourth surface 322 being greater than or equal to the adhesiveness of the second surface 321.

[0144] The adhesiveness of the second surface 321 of the second sub-pad 320 can be reduced by subjecting the second surface 321 of the second sub-pad 320 to unilateral ultraviolet light irradiation. Of course, other methods can also be used to reduce the adhesiveness of the second surface 321 of the second sub-pad 320, so that the adhesiveness of the fourth surface 322 is greater than that of the second surface 321.

[0145] On the one hand, the second surface 321 is located on the side of the pad 300 away from the heating element 100, so there is no requirement for viscosity, and the pad 300 can achieve the effect of unilateral viscosity. On the other hand, by making the viscosity of the second surface 321 less than that of the first surface 311, and even less than that of the fourth surface 322, there is no need to add materials such as insulating film to the second surface 321 to reduce viscosity. The thermal resistance of the pad 300 will not increase due to materials such as insulating film, which is conducive to improving the overall thermal conductivity of the interface where the second surface 321 is located.

[0146] In some embodiments, the adhesiveness of the first sub-pad 310 is greater than that of the second sub-pad 320.

[0147] On the one hand, it can improve the adhesion of the first sub-pad 310 to the heating element 100, reducing the possibility of insufficient adhesion between the heating element 100 and the pad 300, which could lead to a decrease in thermal conductivity. On the other hand, the material of the first sub-pad 310 can be selected more based on adhesion requirements, and the material of the second sub-pad 320 can be selected more based on thermal conductivity requirements, thereby improving the heat dissipation effect of the battery device 10.

[0148] In some embodiments, such as Figure 8 As shown, along the first direction F1, there is a first gap J1 between the heating element 100 and the heat sink 200, and the pad 300 is disposed within the first gap J1 with an interference fit.

[0149] The heat sink 200 refers to the component that performs thermal management on the heat source 100. The heat sink 200 can be a liquid cooling plate. The heat sink 200 can include a plate 220 and two pipes 230 disposed on the plate 220. The plate 220 is provided with a receiving space for containing thermal management fluid. The two pipes 230 are respectively connected to the receiving space. One of the pipes 230 can be used to input thermal management fluid into the plate 220, and the other pipe 230 can output the thermal management fluid after heat exchange with the heat source 100 to the outside, so that the heat source 100 can be circulated for thermal management.

[0150] The first gap J1 refers to the gap located between the heating element 100 and the heat sink 200 and used to set the pad 300.

[0151] Since the pad 300 is interference-fitted within the first gap J1, it is understood that the thickness of the pad 300 is greater than the dimension of the first gap J1 in the first direction F1. In this way, the pad 300 can still maintain good contact with the heat source 100 under the condition of interface tolerance and deformation, thereby reducing the increase of interface thermal resistance due to gap problems, and thus improving the heat dissipation efficiency and reliability of the battery device 10.

[0152] It should be noted that one or more pads 300 may be provided within the first gap J1 as needed.

[0153] In some embodiments, the heating element 100 and the heat sink 200 are detachably connected along the first direction F1.

[0154] It facilitates the disassembly and assembly of the heating element 100 and the heat sink 200, and also allows the pad 300 to be stably clamped between the heating element 100 and the heat sink 200, thereby improving the heat dissipation effect and reliability of the battery device 10.

[0155] In some embodiments, such as Figure 3 As shown, the heating element 100 includes a plurality of first connecting portions 111, and the heat sink 200 includes a plurality of second connecting portions 210 corresponding to the plurality of first connecting portions 111. The first connecting portions 111 and the corresponding second connecting portions 210 are detachably connected. The plurality of second connecting portions 210 are arranged at intervals around the pad 300.

[0156] The first connecting part 111 may be provided with a first connecting hole, and the second connecting part 210 may be provided with a second connecting hole corresponding to the first connecting hole. The battery device 10 also includes a first connecting member 600 adapted to the first connecting hole and the second connecting hole respectively. In this way, the heating element 100 and the heat sink 200 can be detachably connected through multiple first connecting members 600.

[0157] For example, both the first connecting hole and the second connecting hole are threaded holes, and the first connecting member 600 is a bolt adapted to the threaded hole.

[0158] All second connecting parts 210 are located on the side of the plate 220 near the pad 300.

[0159] Since the first connecting part 111 is detachably connected to the corresponding second connecting part 210, and multiple second connecting parts 210 are arranged at intervals around the pad 300, the pad 300 can be more stably sandwiched between the heating element 100 and the heat sink 200, thereby improving the heat dissipation effect and reliability of the battery device 10.

[0160] It should be added that the pad 300 can be cut by avoiding multiple second connecting parts 210 so that multiple second connecting parts 210 are arranged at intervals around the pad 300.

[0161] In some embodiments, please refer to Figure 9 and Figure 10 The battery device 10 also includes a support member 400 and an elastic layer 500. Along the first direction F1, the support member 400 is disposed on the side of the heat sink 200 away from the pad 300. Along the first direction F1, the elastic layer 500 is disposed between the heat sink 200 and the support member 400.

[0162] Support component 400 refers to the component used to support heat sink 200 and heat source 100, etc.

[0163] The elastic layer 500 refers to the component located between the heat sink 200 and the support member 400.

[0164] The elastic layer 500 can be foam, and the material of the elastic layer 500 can also include other materials with good resilience, such as foam.

[0165] The elastic layer 500 can absorb interface deformation, which helps to improve the fit between the pad 300 and the heat sink 200, thereby reducing the increase in interface thermal resistance caused by gap problems, and thus improving the heat dissipation efficiency and reliability of the battery device 10.

[0166] In some embodiments, such as Figure 11 As shown, along the first direction F1, there is a second gap J2 between the heat sink 200 and the support member 400, and the elastic layer 500 is interference-fitted within the second gap J2.

[0167] The second gap J2 refers to the gap located between the heat sink 200 and the support 400, which is used to install the elastic layer 500.

[0168] It is understood that the thickness of the elastic layer 500 is greater than the size of the second gap J2 in the first direction F1. Thus, in the case of interface tolerance and / or interface deformation, the elastic layer 500 can absorb the interface deformation, allowing the heat sink 200 to fit well against the pad 300. This can reduce the increase in interface thermal resistance caused by gap problems, thereby improving the heat dissipation efficiency and reliability of the battery device 10.

[0169] In some embodiments, the heat sink 200 and the support 400 are detachably connected along the first direction F1.

[0170] For example, the support member 400 includes a plurality of third connecting parts 410 corresponding to a plurality of second connecting parts 210. Each third connecting part 410 is provided with a third connecting hole, and the third connecting hole corresponds one-to-one with the second connecting hole. The heat sink 200 and the support member 400 can be detachably connected through a plurality of first connecting parts 600.

[0171] Alternatively, the housing 110, heat sink 200, and support 400 of the heating element 100 can be detachably connected via multiple first connectors 600.

[0172] This facilitates the disassembly and assembly of the heat sink 200 and the support 400, and also allows the elastic layer 500 to be stably sandwiched between the heat sink 200 and the support 400, thereby improving the heat dissipation effect and reliability of the battery device 10.

[0173] One embodiment of the battery device of this application includes a heating element 100, a pad 300, and a heat sink 200. The heating element 100 is a high-voltage box, and the battery is electrically connected to the high-voltage box. The pad 300 can be used to transfer the heat generated by the heating element 100 during operation to the heat sink 200, and the heat sink 200 can be used to dissipate heat from the heating element 100, thereby improving the heat dissipation effect of the battery device 10.

[0174] One embodiment of this application provides an electrical device including the battery device 10 described above.

[0175] One embodiment of this application provides a battery production line for the production of battery devices according to any of the above embodiments. The battery production line includes a vision system (not shown) for confirming whether the pad 300 is mounted on one side of the heat source 100 in a first orientation. When the pad 300 is in the first orientation, along the first direction F1, the first surface 311 is disposed closer to the heat source 100 than the second surface 321.

[0176] The vision system may include a CCD camera.

[0177] After the pad 300 is assembled, a vision system can be used to identify or check whether the pad 300 is incorrectly installed, thus ensuring that the pad 300 is bonded to the heating element 100 in the correct installation direction. This reduces the possibility of insufficient adhesion due to incorrect assembly direction, which could lead to a decrease in thermal conductivity and improve the thermal conductivity of the pad 300, thereby extending the service life of the battery device 10. Of course, this application is not limited to this; a vision system can also be used to identify or check whether the pad 300 is missing.

[0178] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0179] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery device, characterized in that, include: Heating element (100); Heat sink (200); and A pad (300) is located between the heating element (100) and the heat sink (200). The pad (300) includes a first surface (311) that is in contact with the heating element (100) and a second surface (321) that is in contact with the heat sink (200). The first surface (311) has first visual information, and the second surface (321) has second visual information that is different from the first visual information.

2. The battery device according to claim 1, characterized in that, The adhesive force between the first surface (311) and the heating element (100) is greater than the adhesive force between the second surface (321) and the heat sink (200); or the adhesive force between the first surface (311) and the heating element (100) is less than the adhesive force between the second surface (321) and the heat sink (200).

3. The battery device according to claim 2, characterized in that, The viscosity of the first surface (311) is greater than that of the second surface (321); The heating element (100) is a high-voltage box.

4. The battery device according to claim 3, characterized in that, The heat sink (200) is a liquid cooling plate; The high-voltage box includes a box body (110) and electrical components; The electrical components are assembled into the housing (110). The adhesive force between the box body (110) and the first surface (311) is greater than the adhesive force between the liquid cooling plate and the second surface (321).

5. The battery device according to claim 4, characterized in that, The high-voltage box also includes an electrical connector (120). The housing (110) has an opening (K) on the side facing the first surface (311), at least a portion of the electrical connector (120) is located at the opening (K), and the first surface (311) seals the opening (K).

6. The battery device according to claim 4, characterized in that, The high-voltage box also includes a reinforcing structure (130), which is connected to the box body (110).

7. The battery device according to claim 6, characterized in that, The reinforcing structure (130) includes a first reinforcing part (131) and a second reinforcing part (132). The first reinforcing part (131) is connected to the side of the housing (110) away from the pad (300); the second reinforcing part (132) is connected to the side of the housing (110) close to the pad (300); the second reinforcing part (132) is spaced apart from the pad (300); and / or The reinforcing structure (130) and the box body (110) are integrally formed.

8. The battery device according to claim 4, characterized in that, The high-voltage box also includes an electrical connector (120); the orthographic projection of the electrical connector (120) in the target plane overlaps with the orthographic projection of the pad (300) in the target plane; The target plane is perpendicular to the first direction (F1), and the first direction (F1) is parallel to the thickness direction of the pad (300).

9. The battery device according to any one of claims 1-8, characterized in that, The pad (300) includes a first sub-pad (310) and a second sub-pad (320) stacked together. The first surface (311) is formed on the side of the first sub-pad (310) away from the second sub-pad (320); The second surface (321) is formed on the side of the second sub-pad (320) away from the first sub-pad (310).

10. The battery device according to claim 9, characterized in that, The first surface (311) and the side of the first sub-pad (310) closest to the second sub-pad (320) both have the first visual information; and / or The second surface (321) and the second sub-pad (320) on the side of the first sub-pad (310) both have the second visual information.

11. The battery device according to claim 9, characterized in that, The first sub-pad (310) and the second sub-pad (320) are bonded together.

12. The battery device according to claim 9, characterized in that, The first sub-pad (310) includes a third surface (312) connected to the second sub-pad (320); the adhesiveness of the first surface (311) and the adhesiveness of the third surface (312) are both greater than the adhesiveness of the second surface (321).

13. The battery device according to claim 9, characterized in that, The second sub-pad (320) includes a fourth surface (322) connected to the first sub-pad (310); The viscosity of the fourth surface (322) is greater than or equal to the viscosity of the second surface (321).

14. The battery device according to claim 9, characterized in that, The viscosity of the first sub-pad (310) is greater than that of the second sub-pad (320).

15. The battery device according to any one of claims 1-8, characterized in that, Along the first direction (F1), there is a first gap (J1) between the heating element (100) and the heat sink (200), and the pad (300) is disposed within the first gap (J1) with an interference fit.

16. The battery device according to any one of claims 1-8, characterized in that, Along the first direction (F1), the heating element (100) and the heat sink (200) are detachably connected.

17. The battery device according to claim 16, characterized in that, The heating element (100) includes a plurality of first connecting portions (111); The heat sink (200) includes a plurality of second connecting portions (210) corresponding to the plurality of first connecting portions (111). The first connecting part (111) is detachably connected to the corresponding second connecting part (210); Multiple second connecting portions (210) are arranged at intervals around the pad body (300).

18. The battery device according to any one of claims 1-8, characterized in that, The battery device also includes: A support member (400), along a first direction (F1), the support member (400) being disposed on the side of the heat sink (200) away from the pad (300); and An elastic layer (500) is disposed between the heat sink (200) and the support member (400) along the first direction (F1).

19. The battery device according to claim 18, characterized in that, Along the first direction (F1), there is a second gap (J2) between the heat sink (200) and the support member (400), and the elastic layer (500) is interference-fitted within the second gap (J2).

20. The battery device according to claim 18, characterized in that, Along the first direction (F1), the heat sink (200) and the support (400) are detachably connected.

21. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1-20.

22. A battery production line, characterized in that, The battery production line is used in the production of the battery device according to any one of claims 1-20; The battery production line includes a vision system for confirming whether the pad (300) is mounted on one side of the heating element (100) in a first position; when the pad (300) is in the first position, along the first direction (F1), the first surface (311) is positioned closer to the heating element (100) than the second surface (321).

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