Distribution box, battery pack and vehicle

Abstract

The invention relates to a power distribution box, a battery pack and a vehicle. The power distribution box comprises a plurality of electrical components, a box body and a liquid medium, a mounting cavity is formed in the box body; the plurality of electrical components are mounted in the mounting cavity; the installation cavity is filled with the liquid medium, the liquid medium immerses at least one part of the multiple electrical assemblies, and the liquid medium comprises a cooling insulation arc extinguishing medium. The invention aims to solve the technical problems of complex structure, low cooling efficiency and poor product compatibility of the existing distribution box.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a distribution box, a battery pack and a vehicle. Background Art

[0002] In recent years, new energy vehicles have gradually popularized super-fast charging functions. Super-fast charging currents are usually large, so high-voltage control boxes that meet super-fast charging functions usually face great heat dissipation challenges. The current heat dissipation method is to use a heat dissipation device to dissipate heat from the contactor assembly and copper busbar. Other high-voltage components often use vacuum arc extinguishing, magnetic arc extinguishing, solid quartz sand arc extinguishing, etc. due to the need for arc extinguishing; each device has a separate arc extinguishing design, resulting in the entire distribution box facing problems such as low volume grouping rate, high cost, and poor product compatibility. Summary of the invention

[0003] The embodiments of the present application provide a distribution box, a battery pack and a vehicle, aiming to solve the technical problems of the existing distribution box having a complex structure, low cooling efficiency and poor product compatibility.

[0004] In order to achieve the above object, according to a first aspect of the present application, a distribution box is provided, comprising: A box body is formed with a mounting cavity; a plurality of electrical components, wherein the plurality of electrical components are mounted in the mounting cavity; and, A liquid medium is filled in the installation cavity, and the liquid medium immerses at least a portion of the plurality of electrical components, and the liquid medium includes a cooling insulating arc-extinguishing medium.

[0005] Optionally, the plurality of electrical components include a fuse component, the fuse component is disposed near the bottom of the mounting cavity, and the liquid medium immerses at least a portion of the fuse component.

[0006] Optionally, the insurance component includes two first connecting members and at least one melt structure, the two first connecting members are arranged opposite to each other, at least one melt structure is connected between the two first connecting members, and the two first connecting members and at least one melt structure are immersed in the liquid medium.

[0007] Optionally, the liquid level of the liquid medium is at least higher than the melt structure.

[0008] Optionally, the safety assembly includes two melt structures, and the two melt structures are spaced apart along the height direction of the box.

[0009] Optionally, each of the melt structures includes a plurality of fuse parts, the plurality of fuse parts are spaced apart along the length direction of the box body, and each of the fuse parts includes a plurality of grooves spaced apart along the width direction of the box body.

[0010] Optionally, the plurality of electrical components further include at least one contactor component, and the at least one contactor component is disposed near the bottom of the mounting cavity, and the liquid medium immerses at least a portion of the at least one contactor component.

[0011] Optionally, each of the contactor assemblies comprises: An iron core mechanism, the iron core mechanism comprising an iron core, a bracket, a coil and a control unit, the bracket being arranged in the installation cavity, the bracket forming a receiving cavity, the coil and the control unit being arranged in the receiving cavity, the iron core being arranged in the bracket and being arranged opposite to the coil; and, A contact mechanism, arranged opposite to the core mechanism, the contact mechanism comprising a first contact and a second contact, the first contact and the second contact being arranged opposite to each other, and the first contact being connected to the core; Wherein, the core mechanism and the contact mechanism are immersed in the liquid medium.

[0012] Optionally, each of the contactor assemblies further includes an arc extinguishing mechanism and a sealing box, wherein the sealing box is immersed in the liquid medium, the sealing box is connected to the second contact, the arc extinguishing mechanism is arranged in the sealing box, and the sealing box is used to isolate the arc extinguishing mechanism from the liquid medium.

[0013] Optionally, the plurality of electrical components further include a resistor component, the resistor component is disposed close to the bottom of the mounting cavity, and the liquid medium immerses at least a portion of the resistor component.

[0014] Optionally, the resistor assembly includes two second connecting members and a plurality of resistance wires, the two second connecting members are arranged opposite to each other, the plurality of resistance wires are connected between the two second connecting members, and the plurality of resistance wires are close to the bottom of the installation cavity and immersed in the liquid medium.

[0015] Optionally, each of the resistance wires has a first side close to the bottom of the installation cavity, and a distance between the first side and the bottom of the installation cavity is L, wherein L≥2 mm.

[0016] Optionally, a plurality of the electrical components are electrically connected to each other.

[0017] Optionally, at least one of the contactor assemblies comprises a first contactor assembly; One of the first connectors of the fuse assembly is electrically connected to the input end of the distribution box, another of the first connectors is electrically connected to one end of the second contact of the first contactor assembly, and the other end of the second contact of the first contactor is electrically connected to the output end of the distribution box.

[0018] Optionally, one end of the resistor component is electrically connected to the other first connector of the fuse component, and the other end of the resistor component is electrically connected to the output end of the distribution box.

[0019] Optionally, at least one of the contactor assemblies comprises a second contactor assembly (a); One end of the second contact of the second contactor assembly (a) is electrically connected to the input end of the distribution box, and the other end of the second contact of the second contactor assembly (a) is electrically connected to the output end of the distribution box.

[0020] Optionally, the liquid medium includes any one of hydrocarbon compounds, hydrocarbon compounds, silicone compounds, and hydrofluoroethers.

[0021] According to a second aspect of the present application, a battery pack is provided, comprising the above-mentioned distribution box.

[0022] According to a third aspect of the present application, a vehicle is provided, comprising the above-mentioned battery pack.

[0023] The distribution box provided by the present application has a simple structure and high module integration. Through the liquid medium, multiple electrical components are immersed. The liquid medium can not only cool the multiple electrical components, but also achieve insulation to avoid short circuits between multiple electrical components, and can also play an arc extinguishing role. Specifically, during normal overcurrent, the liquid medium plays an insulating role to avoid short circuits between multiple electrical components; at the same time, in high-power situations, the liquid medium can dissipate heat for multiple electrical components to avoid excessive temperatures of the electrical components; in abnormal conditions, when the electrical components are segmented or abnormally fused to generate an arc, the liquid medium plays an arc extinguishing role because the electrical components are immersed in the liquid medium. The distribution box provided by the present application is compatible with high-current charging and discharging scenarios, can reduce the temperature of electrical components, thereby reducing aging, life, and durability problems caused by temperature, and increasing the service life of electrical components. At the same time, it can also achieve arc extinguishing effect to avoid phenomena such as thermal runaway.

[0024] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0026] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0027] Figure 1 It is a structural schematic diagram of an embodiment of a distribution box provided by the present application; Figure 2 yes Figure 1 The structural diagram of the middle insurance component; Figure 3 yes Figure 1 The structural diagram of the contactor assembly; Figure 4 yes Figure 1 Schematic diagram of the structure of the middle resistor component; Figure 5 yes Figure 1 A simplified structural diagram of the electrical connections of multiple electrical components.

[0028] Description of reference numerals: 100. Distribution box; 1. Box body; 11. Installation cavity; 12. Input end; 13. Output end; 2. Insurance component; 21. First connecting piece; 22. Melt structure; 221. Fuse part; 3. First contactor assembly; 3a. Second contactor assembly; 31. Iron core; 32. Bracket; 33. Coil; 34. Control unit; 35. First contact; 36. Second contact; 37. Arc extinguishing mechanism; 4. Resistance assembly; 41. Second connecting member; 42. Resistance wire. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely 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, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0030] In recent years, new energy vehicles have gradually popularized super-fast charging functions. Super-fast charging currents are usually large, so high-voltage control boxes that meet super-fast charging functions usually face great heat dissipation challenges. The current heat dissipation method is to use a heat dissipation device to dissipate heat from the contactor assembly and copper busbar. Other high-voltage components often use vacuum arc extinguishing, magnetic arc extinguishing, solid quartz sand arc extinguishing, etc. due to the need for arc extinguishing; each device has a separate arc extinguishing design, resulting in the entire distribution box facing problems such as low volume grouping rate, high cost, and poor product compatibility.

[0031] According to the first aspect of the present application, the present application proposes a distribution box 100, Figures 1 to 5 This is a structural schematic diagram of an embodiment of the distribution box 100 provided in the present application. The distribution box 100 provided in the present application has a simple structure, high product compatibility, and high cooling and arc extinguishing efficiency. The distribution box 100 will be described in detail below in conjunction with the main drawings.

[0032] See also Figure 1 The distribution box 100 includes multiple electrical components, a box body 1 and a liquid medium; the box body 1 is formed with an installation cavity 11, and the installation cavity 11 is used to install multiple electrical components; the liquid medium is filled in the installation cavity 11, and the liquid medium immerses at least a part of the multiple electrical components, and the liquid medium includes a cooling insulating arc extinguishing medium.

[0033] The distribution box 100 provided by the present application has a simple structure and high module integration. Through the liquid medium, multiple electrical components are immersed. The liquid medium can not only cool the multiple electrical components, but also achieve insulation to avoid short circuits between multiple electrical components, and can also play an arc extinguishing role. In normal overcurrent, the liquid medium plays an insulating role to avoid short circuits between multiple electrical components; at the same time, in high-power situations, the liquid medium can dissipate heat for multiple electrical components to avoid excessive temperature of the electrical components; in abnormal conditions, when the electrical components are segmented or abnormally fused to generate an arc, the liquid medium plays an arc extinguishing role because the electrical components are immersed in the liquid medium. The distribution box 100 provided by the present application is compatible with high-current charging and discharging scenarios, can reduce the temperature of electrical components, thereby reducing aging, life, and durability problems caused by temperature, and increasing the service life of electrical components. At the same time, it can also achieve arc extinguishing effect to avoid thermal runaway and other phenomena.

[0034] In some embodiments, multiple electrical components are arranged near the bottom of the installation cavity 11, and such an arrangement can ensure that the multiple electrical components are immersed in the liquid medium. In addition, multiple electrical components can also be arranged in the middle or upper part of the installation cavity 11, and it is only necessary to ensure that the liquid medium can immerse the multiple electrical components. It should be noted that, as a preferred embodiment, multiple electrical components are arranged near the bottom of the installation cavity 11, which can save a certain amount of liquid medium compared to other positions, and the space utilization is reasonable, and during the cooling process, as the temperature increases, the density of the liquid medium with a higher temperature decreases and moves upward, and the density of the liquid medium with a lower temperature is greater and moves downward, so the temperature at the bottom of the box body 1 will always be lower than the temperature at the top of the box body 1, therefore, the temperature at the bottom of the installation cavity 11 will be lower than the temperature of other parts, and the cooling efficiency is higher.

[0035] See also Figure 1 and Figure 2In this embodiment, the plurality of electrical components include a fuse component 2. During the installation process, the fuse component 2 is arranged close to the bottom of the installation cavity 11. This arrangement is to improve the cooling efficiency. During the cooling process, as the temperature rises, the density of the liquid medium with a higher temperature decreases and moves upward, while the density of the liquid medium with a lower temperature is greater and moves downward. Therefore, the temperature at the bottom of the box body 1 will always be lower than the temperature at the top of the box body 1. The fuse component 2 is arranged close to the bottom of the installation cavity 11, which can improve the cooling efficiency and reduce the temperature of the fuse component 2, thereby avoiding aging, life, and durability problems caused by excessive temperature. Further, the liquid medium immerses at least a portion of the fuse component 2.

[0036] It should be noted that the insurance component 2 generally also includes a shell, an insulating member, an arc extinguishing medium and a cooling medium. In the embodiment, the insurance component 2 directly eliminates the above components. Specifically, the insurance component 2 includes two first connectors 21 and at least one melt structure 22. The two first connectors 21 are arranged relatively along the width direction of the box body 1, and the melt structure 22 is connected between the two first connectors 21. In this embodiment, the structure of the insurance component 2 is simplified, and the shell of the insurance component 2 is eliminated, so that the connector and the melt structure 22 are directly in contact with the liquid medium to improve the cooling efficiency; at the same time, the insulating member is eliminated. Since the liquid medium itself is insulated, there is no need to set an insulating member for insulation, so the insulating member is eliminated; similarly, the cooling insulating medium itself is not conductive. When the insurance component 2 is abnormally melted and an arc is generated, the arc ionizes the liquid medium to produce gases such as hydrogen. These gases can play a role in reducing the arc temperature, cooling the arc and segmenting the arc, thereby playing a role in arc extinguishing. In this way, the structure of the insurance component 2 can be simplified, the integration of the distribution box 100 can be improved, and the cost can be reduced.

[0037] It should be noted that, in this embodiment, the two first connectors 21 are used to fix and position the melt structure 22, and also play a connecting role, conducting the melt structure 22 with other components. Therefore, in the actual installation process, it is only necessary to ensure that the melt structure 22 is immersed in the liquid medium. In some embodiments, in order to improve the safety performance of the distribution box 100, the two first connectors 21 and at least one melt structure 22 are immersed in the liquid medium.

[0038] It should be noted that, in order to improve the safety performance of the distribution box 100 , the liquid level of the liquid medium is at least higher than the melt structure 22 , that is, in this embodiment, it is necessary to ensure that the melt structure 22 is completely immersed in the liquid medium.

[0039] In this embodiment, two melt structures 22 are provided, and the connection method of the two melt structures 22 is not limited, and can be selected according to actual conditions. In some embodiments, the two melt structures 22 are arranged at intervals along the height direction of the box body 1, that is, the two melt structures 22 are arranged up and down, so that it is convenient for the operator to overlap, and the connection strength between the melt structure 22 and the first connecting member 21 can be guaranteed. In another embodiment, there are two melt structures 22, and the two melt structures 22 are arranged at intervals along the width direction of the box body 1, that is, the two melt structures 22 are arranged side by side, so that the temperature of the two melt structures 22 can be kept consistent, avoiding the problem of excessive local temperature, and improving the service life of the insurance component 2.

[0040] It should be noted that the function of the fuse structure 22 is that when an abnormal situation occurs in the distribution box 100, the fuse structure breaks and disconnects the circuit connection of the distribution box 100, thereby avoiding thermal runaway. Specifically, in this embodiment, each fuse structure 22 includes a plurality of fuse parts 221, and the plurality of fuse parts 221 are arranged at intervals along the length direction of the box body 1. When an abnormal situation occurs, the plurality of fuse parts 221 break, the insurance component 2 is powered off, and the circuit connection is disconnected, thereby achieving the function of protecting the circuit.

[0041] It should be noted, however, that the specific type of the fuse 221 is not limited, as long as it can break in an abnormal situation. In some embodiments, each fuse 221 includes a plurality of grooves spaced apart along the width direction of the box body 1. When an abnormal situation occurs, the connecting arm between two adjacent grooves breaks, the fuse 221 is disconnected from the plurality of grooves, and the fuse assembly 2 is powered off, thereby realizing a protection circuit. In other embodiments, a portion of the upper area of ​​the fuse structure is thinned. When an abnormal situation occurs, for example, when the temperature of the distribution box is too high, the thinned area is melted and breaks, and the fuse assembly 2 is powered off, thereby realizing a protection circuit. Furthermore, the thinned area is the fuse 221.

[0042] In this embodiment, the two connectors and the fuse structure 22 are immersed in the liquid medium. When a short circuit or abnormal current occurs, the fuse structure 22 breaks at the fuse part 221, and the liquid medium replaces the traditional arc extinguishing medium to achieve arc cooling and arc extinguishing functions, thereby improving the safety performance of the distribution box 100. At the same time, the insurance component 2 does not need to be provided with a housing, insulating parts and other components, and the structure is more compact, the occupied space is reduced, and the cost is reduced.

[0043] See also Figure 1 and Figure 3, the multiple electrical components also include at least one contactor component. During the installation process, the contactor component is arranged close to the bottom of the installation cavity 11. This arrangement is to improve the cooling efficiency. During the cooling process, as the temperature rises, the density of the liquid medium with a higher temperature decreases and moves upward, and the density of the liquid medium with a lower temperature is larger and moves downward. Therefore, the temperature at the bottom of the box body 1 will always be lower than the temperature at the top of the box body 1. The contactor component is arranged close to the bottom of the installation cavity 11, which can improve the cooling efficiency and reduce the temperature of the contactor component, thereby avoiding aging, life, and durability problems caused by excessive temperature. Further, the liquid medium immerses at least a portion of at least one contactor component. At the same time, since the heating part of the contact component is arranged close to the bottom of the installation cavity 11, under the premise of not setting a fixed flow channel, the liquid medium will first contact the heating part, and due to the characteristics of the liquid medium itself, the temperature at the bottom of the installation cavity 11 is also low, the cooling effect is better, and it is arranged close to the bottom, which is safer. As the use time increases, the liquid medium decreases due to evaporation and other reasons. The heat-generating part of the contact component is arranged at the bottom of the installation cavity 11, so that this part can be immersed in the liquid medium all the time, which is safer.

[0044] See also Figure 3 Each contactor assembly includes an iron core mechanism and a contact mechanism. The iron core mechanism includes an iron core 31, a bracket 32, a coil 33 and a control unit 34. Specifically, the bracket 32 ​​is arranged in the installation cavity 11. The interior of the bracket 32 ​​is hollow. A accommodating cavity is formed between the bracket 32 ​​and the bottom of the installation cavity 11. The coil 33 and the control unit 34 are arranged in the accommodating cavity. The control unit 34 is used to control the operation of the entire contactor assembly. Therefore, the heat generated by the control unit 34 is relatively high. During installation, the control unit 34 is installed at the bottom of the coil 33, that is, the controller is arranged close to the bottom of the installation cavity 11. Since the temperature of the liquid medium at the bottom is relatively low, the controller is located at the bottom and can be at a suitable working temperature, thereby avoiding problems such as ablation caused by excessive temperature of the controller. Furthermore, the iron core 31 is arranged on the bracket 32 ​​and is arranged opposite to the coil 33, and the iron core 31 is located outside the accommodating cavity; the contact mechanism is arranged opposite to the iron core mechanism, and the contact mechanism includes a first contact 35 and a second contact 36, the first contact 35 and the second contact 36 are arranged opposite to each other, and the first contact 35 is connected to the iron core 31; wherein, the iron core mechanism and the contact mechanism are immersed in the liquid medium. In this embodiment, the contactor assembly is not provided with an arc extinguishing mechanism 37, and the arc extinguishing function is realized by the liquid medium. Specifically, the first contact 35 and the second contact 36 are directly immersed in the liquid medium. When the contactor assembly is abnormal and an arc is generated, the arc ionizes the liquid medium to generate gases such as hydrogen and bubbles. These gas bubbles can play a role in reducing the arc temperature, cooling the arc and segmenting the arc, thereby playing a role in arc extinguishing. In this way, the structure of the contactor assembly can be simplified, and the integration of the distribution box 100 can be improved, thereby reducing costs.

[0045] It should be noted that the working modes and working principles of the iron core 31 , the coil 33 , the first contact 35 and the second contact 36 may refer to conventional settings in the art, and will not be described in detail here.

[0046] In some other embodiments, each contactor assembly further includes an arc extinguishing mechanism 37 and a sealing box, the sealing box is immersed in the liquid medium, the sealing box is connected to the second contact 36, the arc extinguishing mechanism 37 is arranged in the sealing box, and the sealing box is used to isolate the arc extinguishing mechanism 37 from the liquid medium. By setting an additional arc extinguishing mechanism 37 to extinguish the arc, the safety performance of the contactor assembly is improved. It should be noted that the specific structure and arc extinguishing method of the arc extinguishing mechanism 37 can refer to the conventional settings in the field, and will not be repeated here.

[0047] See also Figure 1 and Figure 4 The multiple electrical components also include a resistor component 4. During the installation process, the resistor component 4 is placed close to the bottom of the installation cavity 11. This is to improve the cooling efficiency. During the cooling process, as the temperature rises, the density of the liquid medium with a higher temperature decreases and moves upward, while the density of the liquid medium with a lower temperature is greater and moves downward. Therefore, the temperature at the bottom of the box body 1 will always be lower than the temperature at the top of the box body 1. Placing the resistor component 4 close to the bottom of the installation cavity 11 can improve the cooling efficiency and reduce the temperature of the resistor component 4, thereby avoiding aging, life, and durability problems caused by excessive temperature. Further, the liquid medium immerses at least a portion of the resistor component 4.

[0048] See also Figure 4 The resistor assembly 4 includes two second connectors 41 and a plurality of resistance wires 42. The two second connectors 41 are arranged opposite to each other along the length direction of the box body 1. The plurality of resistance wires 42 are connected between the two second connectors 41. The plurality of resistance wires 42 are arranged at intervals along the width direction of the box body 1. The plurality of resistance wires 42 are close to the bottom of the installation cavity 11 and immersed in the liquid medium. In this embodiment, the resistor assembly 4 removes the components used for bearing and cooling, such as cement and shell in the traditional structure, and is fixed to the box body 1 through the two second connectors 41, so that the box body 1 serves as a bearing component. At the same time, the resistance wires 42 are directly immersed in the liquid medium, and cooling, insulation and arc extinguishing are achieved through the liquid medium, thereby simplifying the structure of the resistor assembly 4 and improving the integration of the distribution box 100, thereby reducing costs.

[0049] It should be noted that, in this embodiment, the two second connectors 41 are used to fix and position the multiple resistance wires 42, and also play a connecting role, conducting the resistance wires 42 with other components. Therefore, in the actual installation process, it is only necessary to ensure that the multiple resistance wires 42 are immersed in the liquid medium. In some embodiments, in order to improve the safety performance of the distribution box 100, the two second connectors 41 and the multiple resistance wires 42 are immersed in the liquid medium.

[0050] It should be noted that the arrangement of the multiple resistance wires 42 is not limited and can be selected according to actual conditions. In some embodiments, considering the cooling efficiency, the multiple resistance wires 42 are arranged at intervals along the width direction of the box body 1, that is, the multiple resistance wires 42 are arranged side by side, so that the temperature of the multiple resistance wires 42 can be kept consistent, avoiding the situation of excessive local temperature, and improving the service life of the resistance structure.

[0051] In some embodiments, each resistance wire has a first side close to the bottom of the mounting cavity, and the distance between the first side and the bottom of the mounting cavity is L. In order to ensure the flow and immersion effect of the liquid medium, L≥2mm. That is, when the resistance wire is too close to the bottom of the mounting cavity, the liquid medium cannot flow between the resistance wire and the bottom of the mounting cavity, resulting in this part of the resistance wire being unable to be immersed, posing certain safety hazards.

[0052] In some embodiments, the liquid medium includes any one of hydrocarbon compounds, hydrocarbon compounds, silicone compounds, and hydrofluoroethers. Specifically, the hydrocarbon compound is mainly mineral oil.

[0053] It should be noted that the circulation method of the liquid medium in the distribution box 100 is not limited, and an active circulation method or a passive circulation method can be adopted. Specifically, in some embodiments, the distribution box 100 adopts a passive circulation method, and the cooling insulating medium mainly adopts mineral oil, and the characteristics of the mineral oil itself are used for cooling circulation. When the temperature of the mineral oil increases, its density decreases, and the mineral oil with a higher temperature goes up, and the mineral oil with a lower temperature goes down due to its higher density, thereby realizing internal circulation. The mineral oil in contact with the box body 1 is cooled by contacting the outside air through the box body 1, thereby realizing circulation in the box body 1. In another embodiment, the distribution box 100 adopts an active circulation method, for example, a delivery pump is set on the outside of the distribution box 100, and the circulation is realized by the delivery pump.

[0054] The positions of the multiple electrical components in the box 1 are not limited and can be arranged according to actual conditions. Figure 1In the length direction of the box body 1, a first installation area, a second installation area, a third installation area, a fourth installation area and a fifth installation area are sequentially formed in the box body 1. The first installation area is configured to install the insurance component 2, the second installation area is configured to install the contactor component, the third installation area is configured to install other components (such as relay components, high-voltage plug-ins, etc.), the fourth installation area is configured to install the resistor component 4, and the fifth installation area is configured to install the contactor component. In this way, the positions of multiple electrical components are reasonably arranged so that the multiple electrical components do not interfere with each other, thereby improving space utilization.

[0055] In this embodiment, multiple electrical components are electrically connected to each other. It should be noted that the electrical connection method between the multiple electrical components is not limited, and the multiple electrical components can be electrically connected through a circuit board or a wiring harness, which can be selected according to actual conditions.

[0056] Further, in this embodiment, please refer to Figure 1 and Figure 5 The distribution box 100 is provided with two input terminals 12 and one output section. The distribution box 100 includes two conductive main circuits. One end of the two conductive main circuits is respectively connected to the two input terminals 12 , and the other end is connected to the output terminal 13 .

[0057] In some embodiments, see Figure 1 and Figure 5 , at least one contactor assembly includes a first contactor assembly 3; the fuse assembly 2 and the first contactor assembly 3 are arranged in one of the conductive main circuits, specifically, one of the first connectors 21 of the fuse assembly 2 is electrically connected to one of the input terminals 12 of the distribution box 100, and the other first connector 21 is electrically connected to one end of the second contact 36 of the first contactor assembly 3, and the other end of the second contact 36 of the first contactor is electrically connected to the output terminal 13 of the distribution box 100.

[0058] For further information, see Figure 1 and Figure 5 One end of the resistor component 4 is electrically connected to another first connector 21 of the insurance component 2, and the other end of the resistor component 4 is electrically connected to the output end 13 of the distribution box 100. That is, the resistor component 4 is arranged in parallel with the first contactor.

[0059] In some embodiments, see Figure 1 and Figure 5 , at least one contactor assembly includes a second contactor assembly 3a; the second contactor assembly 3a is arranged in another conductive main circuit, wherein one end of the second contact 36 of the second contactor assembly 3a is electrically connected to another input terminal 12 of the distribution box 100, and the other end of the second contact 36 of the second contactor assembly 3a is electrically connected to the output terminal 13 of the distribution box 100.

[0060] According to a second aspect of the present application, a battery pack is provided, which includes the above-mentioned distribution box 100. The battery pack has all the beneficial effects of the above-mentioned distribution box 100, which will not be described in detail in the present application.

[0061] According to a third aspect of the present application, a vehicle is provided, the vehicle comprising the above-mentioned battery pack. The vehicle has all the beneficial effects of the above-mentioned battery pack, which will not be described in detail in the present application.

[0062] In some embodiments, the vehicle may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and this application does not make any specific limitations on this.

[0063] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0064] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0065] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0066] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. The description of each embodiment has its own focus. For the parts not described in detail in a certain embodiment, please refer to the relevant effective embodiments of other embodiments. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A distribution box, characterized in that: include: A box body is formed with a mounting cavity; A plurality of electrical components, wherein the plurality of electrical components are installed in the installation cavity; as well as, A liquid medium is filled in the installation cavity, and the liquid medium immerses at least a portion of the plurality of electrical components, and the liquid medium includes a cooling insulating arc-extinguishing medium.

2. The distribution box according to claim 1, characterized in that: The plurality of electrical components include a fuse component, the fuse component is disposed near the bottom of the mounting cavity, and the liquid medium immerses at least a portion of the fuse component.

3. The distribution box according to claim 2, characterized in that: The insurance component includes two first connecting members and at least one melt structure, the two first connecting members are arranged opposite to each other, at least one melt structure is connected between the two first connecting members, and the two first connecting members and at least one melt structure are immersed in the liquid medium.

4. The distribution box according to claim 3, characterized in that: The liquid level of the liquid medium is at least higher than the melt structure.

5. The distribution box according to claim 3, characterized in that: The safety component comprises two melt structures, and the two melt structures are arranged at intervals along the height direction of the box.

6. The distribution box according to claim 3, characterized in that: Each of the fuse structures includes a plurality of fuse parts, and the plurality of fuse parts are arranged at intervals along the length direction of the box body. Each of the fuse parts includes a plurality of grooves arranged at intervals along the width direction of the box body.

7. The distribution box according to claim 3, characterized in that: The plurality of electrical components further include at least one contactor component, wherein the at least one contactor component is disposed near the bottom of the mounting cavity, and the liquid medium immerses at least a portion of the at least one contactor component.

8. The distribution box according to claim 7, characterized in that: Each of the contactor assemblies comprises: An iron core mechanism, the iron core mechanism comprising an iron core, a bracket, a coil and a control unit, the bracket being arranged in the installation cavity, the bracket forming a receiving cavity, the coil and the control unit being arranged in the receiving cavity, the iron core being arranged in the bracket and being arranged opposite to the coil; and, A contact mechanism, arranged opposite to the core mechanism, the contact mechanism comprising a first contact and a second contact, the first contact and the second contact being arranged opposite to each other, and the first contact being connected to the core; Wherein, the core mechanism and the contact mechanism are immersed in the liquid medium.

9. The distribution box according to claim 8, characterized in that: Each of the contactor assemblies further comprises an arc extinguishing mechanism and a sealing box, wherein the sealing box is immersed in the liquid medium and connected to the second contact, and the arc extinguishing mechanism is arranged in the sealing box, and the sealing box is used to isolate the arc extinguishing mechanism from the liquid medium.

10. The distribution box according to claim 8, characterized in that: The plurality of electrical components further include a resistor component, which is disposed near the bottom of the mounting cavity, and the liquid medium immerses at least a portion of the resistor component.

11. The distribution box according to claim 10, characterized in that: The resistor assembly includes two second connecting members and a plurality of resistance wires. The two second connecting members are arranged opposite to each other. The plurality of resistance wires are connected between the two second connecting members. The plurality of resistance wires are close to the bottom of the installation cavity and immersed in the liquid medium.

12. The distribution box according to claim 11, characterized in that: Each of the resistance wires has a first side close to the bottom of the installation cavity, and a distance between the first side and the bottom of the installation cavity is L, wherein L≥2 mm.

13. The distribution box according to claim 11, characterized in that: The plurality of electrical components are electrically connected to each other.

14. The distribution box according to claim 13, characterized in that: At least one of the contactor assemblies comprises a first contactor assembly; One of the first connectors of the fuse assembly is electrically connected to the input end of the distribution box, another of the first connectors is electrically connected to one end of the second contact of the first contactor assembly, and the other end of the second contact of the first contactor is electrically connected to the output end of the distribution box.

15. The distribution box according to claim 14, characterized in that: One end of the resistor component is electrically connected to the other first connector of the fuse component, and the other end of the resistor component is electrically connected to the output end of the distribution box.

16. The distribution box according to claim 14, characterized in that: At least one of the contactor assemblies includes a second contactor assembly; One end of the second contact of the second contactor assembly is electrically connected to the input end of the distribution box, and the other end of the second contact of the second contactor assembly is electrically connected to the output end of the distribution box.

17. The distribution box according to claim 1, characterized in that: The liquid medium includes any one of hydrocarbon compounds, hydrocarbon compounds, silicone compounds, and hydrofluoroethers.

18. A battery pack, characterized in that: Comprising a distribution box as described in any one of claims 1-17.

19. A vehicle, characterized in that: Comprising the battery pack as claimed in claim 18.

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