Distribution box, distribution box temperature adjustment method, battery pack and electrical equipment

Abstract

The present application provides a distribution box, a distribution box temperature adjustment method, a battery pack and an electrical device, wherein the distribution box includes a housing and a heating device arranged in the housing, the housing includes a first component, a second component and a third component, wherein the first component is in contact with the heating device, the second component is located above the heating device, the third component is not in direct contact with the heating device and is outside the orthographic projection range of the heating device, at least part of the heating device is provided with a first thermal radiation adjustment layer, and at least part of the third component is provided with a second thermal radiation adjustment layer on its surface; and further includes an excitation mechanism, the excitation mechanism is connected to the first thermal radiation adjustment layer and the second thermal radiation adjustment layer, and the excitation mechanism is used to change the thermal emissivity of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer. The present application can change the heat distribution state inside the distribution box, improve the temperature adjustment ability of the distribution box, and thus improve the working efficiency of the distribution box.

Description

Technical Field

[0001] The present application relates to vehicle manufacturing technology, and in particular to a distribution box, a distribution box temperature regulation method, a battery pack and electrical equipment. Background Art

[0002] The distribution box is an indispensable and important part of the electrical system of new energy vehicles, and is mainly responsible for the distribution and management of electric energy, safety protection, fault handling, communication and data exchange, etc. The temperature of the distribution box has an important impact on the performance, stability and safety of the distribution box. The appropriate temperature range can ensure that the distribution box has good working efficiency.

[0003] In the solutions of the related art, the temperature of the distribution box is mainly adjusted by natural heat dissipation, and the effect of temperature regulation is poor, which affects the working efficiency of the distribution box. Summary of the invention

[0004] In order to overcome the above-mentioned defects under the relevant technology, the purpose of this application is to provide a distribution box, a distribution box temperature adjustment method, a battery pack and electrical equipment. This application can change the heat distribution state inside the distribution box, improve the temperature adjustment ability of the distribution box, so as to improve the working efficiency of the distribution box.

[0005] On the one hand, the present application provides a distribution box, comprising a shell and a heating device arranged in the shell, the shell comprising a first component, a second component and a third component, wherein the first component is in contact with the heating device, the second component is located above the heating device, the third component is not in direct contact with the heating device and is outside the orthographic projection range of the heating device, at least part of the heating device is provided with a first thermal radiation adjustment layer, and at least part of the surface of the third component is provided with a second thermal radiation adjustment layer;

[0006] It also includes an excitation mechanism, which is connected to the first thermal radiation adjustment layer and the second thermal radiation adjustment layer, and is used to change the thermal radiation rates of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer.

[0007] In a possible implementation manner, the first thermal radiation adjustment layer and the second thermal radiation adjustment layer are both vanadium dioxide thin film layers.

[0008] In a possible implementation, the excitation mechanism includes a circuit board, a first conductive sheet, and a second conductive sheet; the first conductive sheet is connected to the first thermal radiation adjustment layer, and the first conductive sheet is electrically connected to the circuit board through a first wire; the second conductive sheet is connected to the second thermal radiation adjustment layer, and the second conductive sheet is electrically connected to the circuit board through a second wire.

[0009] In a possible implementation, it also includes a first temperature sensor and a second temperature sensor, both of which are communicatively connected to the circuit board, the first temperature sensor is used to collect the temperature inside the distribution box, and the second temperature sensor is used to collect the ambient temperature outside the distribution box.

[0010] On the other hand, the present application provides a method for regulating the temperature of a distribution box, which is applied to a distribution box, wherein the distribution box comprises a shell and a heating device arranged in the shell, wherein the shell comprises a first component, a second component and a third component, wherein the first component is in contact with the heating device, the second component is located above the heating device, the third component is not in direct contact with the heating device and is outside the orthographic projection range of the heating device, at least part of the heating device is provided with a first thermal radiation regulating layer, and at least part of the surface of the third component is provided with a second thermal radiation regulating layer; and further comprising an excitation mechanism, wherein the excitation mechanism is connected to the first thermal radiation regulating layer and the second thermal radiation regulating layer, and the excitation mechanism is used to change the thermal emissivity of the first thermal radiation regulating layer and the second thermal radiation regulating layer;

[0011] The method comprises:

[0012] Get the temperature inside the distribution box and the ambient temperature outside the distribution box;

[0013] The thermal emissivity of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer is adjusted according to the temperature in the distribution box and the ambient temperature.

[0014] In a possible implementation, adjusting the thermal emissivity of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer according to the temperature in the distribution box and the ambient temperature includes:

[0015] If the temperature in the distribution box is lower than the ambient temperature, and the difference between the temperature in the distribution box and the ambient temperature is within a range of a first preset value;

[0016] The thermal emissivity of the first thermal radiation adjusting layer is increased, and the thermal emissivity of the second thermal radiation adjusting layer is decreased.

[0017] In a possible implementation, adjusting the thermal emissivity of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer according to the temperature in the distribution box and the ambient temperature includes:

[0018] If the temperature in the distribution box is higher than the ambient temperature, and the difference between the temperature in the distribution box and the ambient temperature is within a range of a second preset value;

[0019] The thermal emissivity of the first thermal radiation adjusting layer is lowered, and the thermal emissivity of the second thermal radiation adjusting layer is increased.

[0020] In a possible implementation, the first thermal radiation adjustment layer and the second thermal radiation adjustment layer are both vanadium dioxide thin film layers; and adjusting the thermal emissivity of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer includes:

[0021] The thermal emissivity of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer is adjusted by controlling the magnitude of the current input into the first thermal radiation adjustment layer and the second thermal radiation adjustment layer.

[0022] On the other hand, the present application provides a battery pack, including a battery pack shell, in which a distribution box as described above is arranged.

[0023] On the other hand, the present application provides an electrical device, including the battery pack as described above.

[0024] The present application provides a distribution box, a distribution box temperature adjustment method, a battery pack and an electrical device, wherein the distribution box includes a housing and a heating device arranged in the housing, the housing includes a first component, a second component and a third component, wherein the first component is in contact with the heating device, the second component is located above the heating device, the third component is not in direct contact with the heating device and is outside the orthographic projection range of the heating device, at least part of the heating device is provided with a first thermal radiation adjustment layer, and at least part of the third component is provided with a second thermal radiation adjustment layer on the surface; and further includes an excitation mechanism, the excitation mechanism is connected to the first thermal radiation adjustment layer and the second thermal radiation adjustment layer, and the excitation mechanism is used to change the thermal radiation rate of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer. The present application sets a first thermal radiation layer on the heating device of the distribution box, sets a second thermal radiation layer on the third component of the housing of the distribution box, and connects the first thermal radiation layer and the second thermal radiation layer through the excitation mechanism, so that the thermal radiation rate of the first thermal radiation layer and the second thermal radiation layer can be adjusted as needed, the heat distribution state inside the distribution box is changed, and the temperature adjustment ability of the distribution box is improved, so as to improve the working efficiency of the distribution box. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 Schematic diagram of three different ways of natural heat dissipation;

[0027] Figure 2 A simplified structural diagram of a distribution box provided in one embodiment of the present application;

[0028] Figure 3 for Figure 2 Exploded view of;

[0029] Figure 4 A flow chart of a method for adjusting the temperature of a distribution box provided in one embodiment of the present application;

[0030] Figure 5 A simplified structural diagram of a battery pack provided in accordance with an embodiment of the present application.

[0031] Reference numerals:

[0032] 1- heat source; 2- first part; 3- second part; 4- third part;

[0033] 10-Distribution box;

[0034] 100-heating device;

[0035] 210-first component; 220-second component; 230-third component;

[0036] 310 - circuit board; 320 - first wire; 330 - second wire;

[0037] 20 - battery pack housing; 21 - battery pack base; 211 - battery mounting slot; 22 - battery pack top cover; 23 - battery pack end cover. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0039] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0040] As described in the background art, in the solution of the related art, the temperature of the distribution box is mainly regulated by natural heat dissipation, and the effect of temperature regulation is poor, which affects the working efficiency of the distribution box.

[0041] like Figure 1As shown, natural heat dissipation mainly includes three different ways: heat conduction, heat convection and heat radiation. Among them, heat conduction is the transfer of heat from the heat source 1 to the first part 2 in direct contact with it. Thermal convection mainly relies on the thermal buoyancy generated by the thermal expansion and contraction of air to transfer heat. The heat transfer direction is opposite to the gravity direction Z (the direction shown by the arrow in the figure), that is, the heat is transferred from the heat source 1 to the second part 3 above it. The characteristics of thermal radiation are that it does not rely on a heat-conducting medium and can occur in a vacuum. Its heat transfer direction is from a high-temperature object to a low-temperature object, and there is no position requirement. That is, the heat is transferred from the heat source 1 to the third part 4 that is not in direct contact with the heat source 1 and is outside the range of the positive projection of the heat source 1 (that is, the projection in the plane perpendicular to the gravity direction Z).

[0042] In the solution of the related art, the distribution box relies on natural heat dissipation when working. When the distribution box is working, the air flow speed in the outer area is faster, and the heat dissipation effect is better. However, an air vortex is formed inside the distribution box, the air flow speed is slow, and the heat is not dissipated in time, which affects the working efficiency of the distribution box.

[0043] In view of this, the embodiments of the present application aim to provide a distribution box, a distribution box temperature regulation method, a battery pack and electrical equipment, by providing a first heat radiation layer on the heating device of the distribution box, providing a second heat radiation layer on the third component of the distribution box shell, and connecting the first heat radiation layer and the second heat radiation layer through an excitation mechanism, so that the thermal emissivity of the first heat radiation layer and the second heat radiation layer can be adjusted as needed, the heat distribution state inside the distribution box is changed, and the temperature regulation ability of the distribution box is improved, so as to improve the working efficiency of the distribution box.

[0044] The contents of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand the contents of the present application in more detail.

[0045] Please refer to Figure 2 and Figure 3 This embodiment provides a distribution box 10, including a housing and a heating device 100 disposed in the housing. For example, the shape of the housing can be designed according to the needs of the actual installation space, for example, it can be a regular shape such as a prism or a cylinder, or it can be Figure 2 The irregular shape shown is not limited in this embodiment. The heating device 100 includes components such as a relay, a fuse, a copper bus, and a wire.

[0046] In this embodiment, the housing includes a first component 210, a second component 220 and a third component 230. Among them, the first component 210 is in contact with the heating device 100. It can be understood that the first component 210 is a component that is in direct contact with the heating device 100. The first component 210 and the heating device 100 can be connected by fasteners such as screws and bolts, and the first component 210 and the heating device 100 are mainly heat-conducted. The heat transfer between the first component 210 and the heating device 100 is mainly carried out by heat conduction. The second component 220 is located above the heating device 100 (that is, in the direction opposite to the gravity direction Z). It can be understood that the second component 220 can be in contact with the heating device 100 or not; when the second component 220 is in contact with the heating device 100, the heat is mainly dissipated between the second component 220 and the heating device 100 by heat conduction and heat convection; when the second component 220 is not in contact with the heating device 100, the heat is mainly dissipated between the second component 220 and the heating device 100 by heat convection. The third component 230 is not in direct contact with the heating device 100 and is outside the orthographic projection (i.e., the projection in a plane perpendicular to the gravity direction Z) of the heating device 100. It is understood that heat is mainly dissipated between the third component 230 and the heating device 100 by heat radiation.

[0047] For example, Figure 2 and Figure 3 As shown, the housing includes a base and a top cover, and the base and the top cover together enclose a cavity for mounting the heating device 100. The heating device 100 can be fixedly connected to the base by screws, so the part of the base that is in direct contact with the heating device 100 constitutes the above-mentioned first component 210. The top cover is arranged above the heating device 100, so the part of the top cover located within the orthographic projection range of the heating device 100 constitutes the above-mentioned second component 220. The third component 230 is the other components on the base and the top cover except the first component 210 and the second component 220. For example, the third component 230 can be selected as a component on the base or the top cover that only plays an auxiliary shielding role, so as to reduce the impact on the entire housing after heat transfer.

[0048] Furthermore, in order to better adjust the heat distribution state inside the distribution box 10, the present embodiment provides a first thermal radiation adjustment layer on at least part of the heating device 100, and a second thermal radiation adjustment layer on the surface of at least part of the third component 230. The distribution box 10 also includes an excitation mechanism, which is connected to the first thermal radiation adjustment layer and the second thermal radiation adjustment layer, and is used to change the thermal emissivity of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer.

[0049] Through the above structure, this embodiment can adjust the thermal emissivity of the first thermal radiation layer and the second thermal radiation layer as needed, change the heat distribution state inside the distribution box 10, improve the temperature regulation ability of the distribution box 10, and thus improve the working efficiency of the distribution box 10.

[0050] For example, after the distribution box 10 has been working for a period of time, the temperature inside the distribution box 10 will continue to rise. When the temperature inside the distribution box 10 is higher than the ambient temperature outside the distribution box 10, the thermal emissivity of the first thermal radiation layer can be lowered, and the thermal emissivity of the second thermal radiation adjustment layer can be increased. At this time, the heat emitted by the heating device 100 is transferred to the third component 230 as quickly as possible by thermal radiation, so that the third component 230 absorbs a large amount of heat emitted by the heating device 100. The temperature of the heating device 100 is reduced to ensure the working efficiency of the distribution box 10. The temperature of the third component 230 is increased to avoid heat accumulation around the heating device 100, so that the heat distribution in the distribution box 10 is more uniform.

[0051] When the distribution box 10 just starts to work, the temperature inside the distribution box 10 is relatively low, and the heating device 100 has not reached its optimal operating temperature range. Especially when the external ambient temperature is low, the temperature inside the distribution box 10 is lower than the ambient temperature outside the distribution box 10. The distribution box 10 using the solution of the related technology may not be able to reach the optimal operating temperature range for a long time. At this time, the thermal emissivity of the first thermal radiation layer can be increased, and the thermal emissivity of the second thermal radiation adjustment layer can be lowered. The heating device 100 absorbs heat as quickly as possible through thermal radiation, and the third component 230 absorbs less radiated heat, accumulating heat around the heating device 100, so that the temperature of the heating device 100 is raised to the optimal operating temperature range as soon as possible to ensure the working efficiency of the distribution box 10.

[0052] In a possible implementation, the first thermal radiation regulating layer and the second thermal radiation regulating layer of this embodiment may both be vanadium dioxide thin film layers, which may change their properties under the action of an external excitation mechanism, thereby changing the thermal emissivity.

[0053] Please continue to refer to Figure 3In a possible implementation, the excitation mechanism of this embodiment includes a circuit board 310, a first conductive sheet, and a second conductive sheet. The first conductive sheet is connected to the first thermal radiation adjustment layer, and the first conductive sheet is electrically connected to the circuit board 310 through a first wire 320. The first wire 320 is used to transfer the current output by the circuit board 310 to the first conductive sheet, thereby applying excitation to the first thermal radiation adjustment layer to change the thermal emissivity of the first thermal radiation adjustment layer. The second conductive sheet is connected to the second thermal radiation adjustment layer, and the second conductive sheet is electrically connected to the circuit board 310 through a second wire 330. The second wire 330 is used to transfer the current output by the circuit board 310 to the second conductive sheet, thereby applying excitation to the second thermal radiation adjustment layer to change the thermal emissivity of the second thermal radiation adjustment layer.

[0054] Exemplarily, the circuit board 310 in this embodiment can be a circuit board of a battery management system (BMS) in the distribution box 10, and a power supply device such as a battery is provided on the circuit board 310 to provide electrical energy. The first wire 320 and the second guide are both electrically connected to the circuit board 310, so as to lead the electrical energy to the first conductive sheet and the second conductive sheet. The first thermal radiation adjustment layer can be, for example, arranged on an insulating component such as a housing of a relay or a housing of a fuse in the heating device 100, and the first conductive sheet is attached to the first thermal radiation adjustment layer by conductive adhesive. The second thermal radiation adjustment layer can, for example, be arranged on the surface of the third component 230 facing the inside of the distribution box 10, and the second conductive sheet is attached to the second thermal radiation adjustment layer by conductive adhesive.

[0055] In some embodiments, a first temperature sensor and a second temperature sensor may also be provided, and both the first temperature sensor and the second temperature sensor are communicatively connected to the circuit board 310, wherein the first temperature sensor is used to collect the temperature inside the distribution box 10, and the second temperature sensor is used to collect the ambient temperature outside the distribution box 10. Exemplarily, the first temperature sensor may be an ambient temperature sensor inside the distribution box 10, and the second temperature sensor may be an ambient temperature sensor of an electrical device (such as a vehicle). The temperature inside the distribution box 10 and the ambient temperature outside the distribution box 10 may be obtained through the first temperature sensor and the second temperature sensor, so as to adjust the thermal emissivity of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer according to the temperature difference between the two, change the heat distribution state inside the distribution box 10, and improve the temperature adjustment ability of the distribution box 10, so as to improve the working efficiency of the distribution box 10.

[0056] Please refer to Figure 4The present application also provides a distribution box temperature regulation method, which is applied to the distribution box. The distribution box includes a shell and a heating device arranged in the shell. The shell includes a first component, a second component and a third component, wherein the first component is in contact with the heating device, the second component is located above the heating device, the third component is not in direct contact with the heating device and is outside the positive projection range of the heating device, at least part of the heating device is provided with a first thermal radiation regulation layer, and at least part of the third component is provided with a second thermal radiation regulation layer on the surface; it also includes an excitation mechanism, the excitation mechanism is connected to the first thermal radiation regulation layer and the second thermal radiation regulation layer, and the excitation mechanism is used to change the thermal emissivity of the first thermal radiation regulation layer and the second thermal radiation regulation layer.

[0057] The method includes:

[0058] Step S110: Acquire the temperature inside the distribution box and the ambient temperature outside the distribution box.

[0059] For example, the temperature inside the distribution box can be obtained by an ambient temperature sensor inside the distribution box, and the ambient temperature outside the distribution box can be obtained by an ambient temperature sensor of an electrical device (such as a vehicle).

[0060] Step S120: adjusting the thermal emissivity of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer according to the temperature in the distribution box and the ambient temperature.

[0061] Exemplarily, the first thermal radiation regulating layer and the second thermal radiation regulating layer may both be vanadium dioxide thin film layers, and the vanadium dioxide thin film layers may change their properties under the action of an external excitation mechanism, thereby changing the thermal emissivity.

[0062] The excitation mechanism includes a circuit board, a first conductive sheet, and a second conductive sheet. The circuit board may be a circuit board of a battery management system (BMS) in a distribution box, and a power supply device such as a battery is provided on the circuit board to provide electrical energy. The first conductive sheet is connected to the first thermal radiation adjustment layer, and the first conductive sheet is electrically connected to the circuit board through a first wire, and the first wire is used to transfer the current output by the circuit board to the first conductive sheet, thereby applying excitation to the first thermal radiation adjustment layer to change the thermal emissivity of the first thermal radiation adjustment layer. The second conductive sheet is connected to the second thermal radiation adjustment layer, and the second conductive sheet is electrically connected to the circuit board through a second wire, and the second wire is used to transfer the current output by the circuit board to the second conductive sheet, thereby applying excitation to the second thermal radiation adjustment layer to change the thermal emissivity of the second thermal radiation adjustment layer. During specific adjustment, the thermal emissivity of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer can be adjusted by controlling the magnitude of the current input to the first thermal radiation adjustment layer and the second thermal radiation adjustment layer. Specifically, when the current input to the first thermal radiation adjustment layer increases, the thermal emissivity of the first thermal radiation adjustment layer can be increased; when the current input to the first thermal radiation adjustment layer decreases, the thermal emissivity of the first thermal radiation adjustment layer can be reduced. When the current input to the second thermal radiation adjustment layer increases, the thermal emissivity of the second thermal radiation adjustment layer can be increased; when the current input to the second thermal radiation adjustment layer decreases, the thermal emissivity of the second thermal radiation adjustment layer can be reduced.

[0063] In this embodiment, the thermal emissivity of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer can be adjusted according to the difference between the temperature in the distribution box and the ambient temperature.

[0064] Specifically, if the temperature in the distribution box is lower than the ambient temperature, and the difference between the temperature in the distribution box and the ambient temperature is within the range of a first preset value (the range of the first preset value can be set as needed, for example, 5°C-50°C). At this time, the distribution box may have just started working, or the distribution box is in a cold ambient temperature; the thermal emissivity of the first thermal radiation adjustment layer can be increased, and the thermal emissivity of the second thermal radiation adjustment layer can be lowered. The heating device absorbs heat as quickly as possible through thermal radiation, and the third component absorbs less radiated heat, accumulating heat around the heating device, so that the temperature of the heating device 100 is raised to the optimal operating temperature range as soon as possible to ensure the working efficiency of the distribution box.

[0065] If the temperature inside the distribution box is higher than the ambient temperature, and the difference between the temperature inside the distribution box and the ambient temperature is within the range of the second preset value (the range of the second preset value can be set as needed, for example, it can be 5°C-50°C). At this time, the distribution box has been working for a period of time, and the temperature of the heating device inside it continues to rise; the thermal emissivity of the first thermal radiation adjustment layer can be lowered, and the thermal emissivity of the second thermal radiation adjustment layer can be increased. The heat emitted by the heating device is transferred to the third component as quickly as possible by thermal radiation, so that the third component absorbs a large amount of heat emitted by the heating device. The temperature of the heating device is reduced to ensure the working efficiency of the distribution box. The temperature of the third component increases to avoid heat accumulation around the heating device, making the heat distribution in the distribution box more uniform.

[0066] The temperature regulation method of the distribution box of this embodiment can adjust the thermal radiation rate of the first thermal radiation layer and the second thermal radiation layer as needed, change the heat distribution state inside the distribution box, improve the temperature regulation ability of the distribution box, and thus improve the working efficiency of the distribution box.

[0067] Please refer to Figure 5 The present embodiment further provides a battery pack, including a battery pack shell 20 , in which the above-mentioned distribution box 10 is disposed.

[0068] Exemplarily, the battery pack housing 20 includes a battery pack base 21, a battery pack top cover 22 and a battery pack end cover 23. The battery pack base 21 is provided with a plurality of battery mounting slots 211 (two are shown in the figure), and a battery can be installed in each battery mounting slot 211. The distribution box 10 is arranged in a space surrounded by the battery pack base 21, the battery pack top cover 22 and the battery pack end cover 23, and is arranged close to the battery pack end cover 23. The distribution box 10 is connected to the battery in the battery mounting slot 211 for communication, and communicates with the outside world through the battery pack end cover 23, thereby adjusting the working state of the battery pack.

[0069] It is understandable that since the battery pack of this embodiment adopts the above-mentioned distribution box 10, the battery pack can change the heat distribution state inside the distribution box 10 as needed, improve the temperature regulation ability of the distribution box 10, and thus improve the working efficiency of the battery pack.

[0070] This embodiment also provides an electrical device, including the above-mentioned battery pack.

[0071] Exemplarily, the electrical equipment may be a new energy vehicle or an energy storage device, etc. Since the electrical equipment adopts the above-mentioned battery pack, the heat distribution state inside the distribution box in the battery pack can be better adjusted, and the temperature regulation ability of the distribution box can be improved to improve the working efficiency of the electrical equipment.

[0072] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0073] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0074] It should be noted that in the description of this application, the terms "first" and "second" are only used to facilitate the description of different components, and cannot be understood as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0075] The various embodiments or implementation methods in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0076] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A distribution box (10), characterized in that: The invention comprises a housing and a heating device (100) arranged in the housing, wherein the housing comprises a first component (210), a second component (220) and a third component (230), wherein the first component (210) is in contact with the heating device (100), and heat is transferred between the first component (210) and the heating device (100) by means of heat conduction; the second component (220) is located above the heating device (100), and heat is transferred between the second component (220) and the heating device (100) by means of heat conduction and / or heat convection; the third component (230) is not in direct contact with the heating device (100) and is outside the orthographic projection range of the heating device (100), and heat is transferred between the third component (230) and the heating device (100) by means of heat radiation; a first heat radiation regulating layer is provided on at least part of the heating device (100), and a second heat radiation regulating layer is provided on the surface of at least part of the third component (230); It also includes an excitation mechanism, which is connected to the first thermal radiation adjustment layer and the second thermal radiation adjustment layer, and is used to lower the thermal emissivity of the first thermal radiation adjustment layer and increase the thermal emissivity of the second thermal radiation adjustment layer; or, the excitation mechanism is used to increase the thermal emissivity of the first thermal radiation adjustment layer and lower the thermal emissivity of the second thermal radiation adjustment layer.

2. The distribution box (10) according to claim 1, characterized in that: The first thermal radiation regulating layer and the second thermal radiation regulating layer are both vanadium dioxide thin film layers.

3. The distribution box (10) according to claim 1, characterized in that: The excitation mechanism comprises a circuit board (310), a first conductive sheet and a second conductive sheet; the first conductive sheet is connected to the first thermal radiation adjustment layer, and the first conductive sheet is electrically connected to the circuit board (310) via a first wire (320); the second conductive sheet is connected to the second thermal radiation adjustment layer, and the second conductive sheet is electrically connected to the circuit board (310) via a second wire (330).

4. The distribution box (10) according to claim 3, characterized in that: It also includes a first temperature sensor and a second temperature sensor, both of which are in communication connection with the circuit board (310), the first temperature sensor being used to collect the temperature inside the distribution box (10), and the second temperature sensor being used to collect the ambient temperature outside the distribution box (10).

5. A method for regulating the temperature of a distribution box, applied to a distribution box, characterized in that: The distribution box includes a shell and a heating device arranged in the shell, and the shell includes a first component, a second component and a third component, wherein the first component is in contact with the heating device, and heat is transferred between the first component and the heating device by heat conduction; the second component is located above the heating device, and heat is transferred between the second component and the heating device by heat conduction and / or heat convection; the third component is not in direct contact with the heating device and is outside the orthographic projection range of the heating device, and heat is transferred between the third component and the heating device by heat radiation; a first thermal radiation adjustment layer is provided on at least part of the heating device, and a second thermal radiation adjustment layer is provided on the surface of at least part of the third component; and an excitation mechanism is also included, the excitation mechanism is connected to the first thermal radiation adjustment layer and the second thermal radiation adjustment layer, and the excitation mechanism is used to change the thermal emissivity of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer; The method comprises: Get the temperature inside the distribution box and the ambient temperature outside the distribution box; According to the temperature in the distribution box and the ambient temperature, the thermal emissivity of the first thermal radiation adjustment layer is lowered and the thermal emissivity of the second thermal radiation adjustment layer is increased; or, the thermal emissivity of the first thermal radiation adjustment layer is increased and the thermal emissivity of the second thermal radiation adjustment layer is lowered.

6. The method for adjusting the temperature of a distribution box according to claim 5, characterized in that: The step of adjusting the thermal radiation rates of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer according to the temperature in the distribution box and the ambient temperature comprises: If the temperature in the distribution box is lower than the ambient temperature, and the difference between the temperature in the distribution box and the ambient temperature is within a range of a first preset value; The thermal emissivity of the first thermal radiation adjusting layer is increased, and the thermal emissivity of the second thermal radiation adjusting layer is decreased.

7. The method for regulating the temperature of a distribution box according to claim 5, characterized in that: The step of adjusting the thermal radiation rates of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer according to the temperature in the distribution box and the ambient temperature comprises: If the temperature in the distribution box is higher than the ambient temperature, and the difference between the temperature in the distribution box and the ambient temperature is within a range of a second preset value; The thermal emissivity of the first thermal radiation adjusting layer is lowered, and the thermal emissivity of the second thermal radiation adjusting layer is increased.

8. The method for regulating the temperature of a distribution box according to claim 5, characterized in that: The first thermal radiation adjustment layer and the second thermal radiation adjustment layer are both vanadium dioxide thin film layers; and the step of adjusting the thermal radiation rates of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer comprises: The thermal emissivity of the first thermal radiation adjustment layer and the second thermal radiation adjustment layer is adjusted by controlling the magnitude of the current input into the first thermal radiation adjustment layer and the second thermal radiation adjustment layer.

9. A battery pack, characterized in that: It comprises a battery pack housing (20), wherein the battery pack housing (20) is provided with a distribution box (10) as claimed in any one of claims 1 to 4.

10. An electrical device, characterized in that: Comprising the battery pack as claimed in claim 9.

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