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 shell; the electric appliance element is arranged in the shell; the electric conductor is connected to the electric appliance element, and at least part of the electric conductor extends to the outer side of the shell to form an exposed part; and the cooling disc is mounted on the outer side of the shell and is used for accommodating an insulating cooling medium, so that the exposed part is immersed in the insulating cooling medium. The part of the electric conductor in the shell is directly connected to the electric appliance element, so that heat generated by the electric appliance element can be directly and quickly conducted to the exposed part through the electric conductor. And the exposed part is immersed in the insulating cooling medium, so that the electric conductor can be rapidly cooled, and the temperature rise in the distribution box is prevented from being too fast. Particularly, when the insulating cooling medium is liquid, the cooling disc is arranged on the outer side of the shell, so that the interior of the shell of the distribution box can be always in a relatively dry state, dry-wet separation is realized, a special electric appliance element which can be completely immersed in the cooling medium does not need to be developed, and the cost is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power distribution boxes, and in particular, to a power distribution box, a battery pack and a vehicle. Background Art

[0002] With the launch of fast-charging and super-fast-charging models, the charging power is as high as over 600kW, and the maximum charging current can exceed 500A. The large charging / discharging current and densely arranged high-power electrical components will bring huge temperature rise impact to the distribution box.

[0003] The distribution box refers to the battery disconnect unit of the battery pack. As a device for disconnecting and connecting high voltage electricity to the power battery, it is an important component of high voltage distribution, cutoff, and short-circuit protection of the battery system. The heat in the distribution box comes from high-power electrical components and conductors through which large currents pass. The heat needs to pass through a long heat transfer path (heat source-electrical component insulation shell-air-distribution box shell-refrigerant) before it can be carried away by the refrigerant. The thermal conductivity of the air and insulators in this path is very poor, resulting in a very large temperature difference on the heat conduction path. For example, the temperature of the electrical components and conductors is very high, while the temperature of the distribution box shell where the refrigerant is located is very low. The heat at the high temperature cannot be conducted away in time, and the internal heat damage of the distribution box is serious. Summary of the invention

[0004] An object of the present disclosure is to provide a power distribution box, a battery pack and a vehicle to at least partially solve the problems existing in the related art.

[0005] In order to achieve the above object, the present disclosure provides a power distribution box, comprising: case; An electrical component is disposed in the housing; A conductor connected to the electrical component, wherein at least a portion of the conductor extends to the outside of the housing to form an external leakage portion; and A cooling plate is installed on the outer side of the shell, and is used to contain an insulating cooling medium so that the leaking part is immersed in the insulating cooling medium.

[0006] Optionally, the leaking portion is attached to the outer wall surface of the shell.

[0007] Optionally, the leaking portion is attached to the bottom wall of the shell, the cooling plate is constructed as a groove with one end open, and the bottom wall of the shell extends into the cooling plate.

[0008] Optionally, the electrical component is fixed to a side wall of the housing.

[0009] Optionally, at least two opposite side walls of the shell are respectively provided with first lugs, and the upper edge of the cooling plate is provided with second lugs for supporting the first lugs, so that the leaking portion is spaced apart from the bottom wall of the cooling plate.

[0010] Optionally, there is an installation gap between the side wall of the shell and the side wall of the cooling plate, and the installation gap is at least partially used to accommodate the insulating cooling medium.

[0011] Optionally, a sealing member is provided at a position in the installation gap higher than the bottom wall of the housing.

[0012] Optionally, a portion of the side wall of the shell extending into the cooling plate is provided with an annular ridge, and the sealing member comprises a sealing ring sleeved on the side wall of the shell, and the sealing ring abuts against a bottom surface of the annular ridge.

[0013] Optionally, a height difference between a top surface of the annular convex edge and an upper edge of the cooling plate is H1, wherein H1 ≥ 3 mm.

[0014] Optionally, in a direction from a side wall of the shell to a corresponding side wall of the cooling plate, a compression amount of the sealing ring is L, wherein L≥2 mm.

[0015] Optionally, the liquid level of the insulating cooling medium is h, the height difference between the lowest point of the bottom wall of the cooling plate and the outer surface of the bottom wall of the shell is H3, and the height difference between the lowest point of the bottom wall of the cooling plate and the lower surface of the seal is H2, wherein (H3+5) mm≤h≤(H2-10) mm.

[0016] Optionally, a reinforcing rib protruding toward the bottom wall of the cooling plate is formed on the bottom wall of the shell, and a portion of the exposed portion corresponding to the reinforcing rib is sandwiched between the bottom wall of the shell and the reinforcing rib.

[0017] Optionally, a height difference between a lower surface of the exposed portion and a lower surface of the reinforcing rib is H6, wherein H6≥3 mm.

[0018] Optionally, a height difference between a lower surface of the leaking portion and a highest point of a bottom wall of the cooling plate is H5, wherein H5-H6≥3 mm.

[0019] Optionally, a height difference between a lower surface of the leaking portion and the lowest point of the bottom wall of the cooling plate is H4, wherein H4≤20 mm.

[0020] Optionally, the conductor is integrally molded with the shell.

[0021] Optionally, a refrigerant pipeline is provided on the bottom wall of the cooling plate, and the refrigerant pipeline is used for supplying the refrigerant to flow.

[0022] Optionally, a mounting groove that is recessed upward into the interior of the cooling disk is formed on the bottom wall of the cooling disk, and the refrigerant pipeline is installed in the mounting groove.

[0023] Optionally, a heat conducting portion is provided between the mounting groove and the refrigerant pipeline.

[0024] Optionally, the cooling plate is made of metal material.

[0025] According to a second aspect of the present disclosure, there is provided a battery pack, comprising the above-mentioned power distribution box.

[0026] According to a third aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned battery pack.

[0027] Through the above technical solution, since the part of the conductor inside the shell is directly connected to the electrical components, the heat generated by the electrical components can be directly and quickly transferred to the external leakage part of the conductor through the conductor (contact heat exchange), which is better than the traditional heat transfer through the insulating shell and air. A cooling plate is installed on the outside of the shell, and the external leakage part is immersed in the insulating cooling medium, so that the conductor can be quickly cooled and cooled to avoid excessive temperature rise inside the distribution box. The insulating cooling medium has good insulation performance and is safe and reliable. Especially when the insulating cooling medium is liquid, the cooling plate is arranged on the outside of the shell to prevent the liquid cooling medium in the cooling plate from being immersed in the shell of the distribution box and causing damage to the electrical components, ensuring that the inside of the shell of the distribution box is always in a relatively dry state, realizing dry and wet separation, and there is no need to develop special electrical components that can be completely immersed in the cooling medium, reducing costs.

[0028] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a schematic diagram of a power distribution box exemplarily shown according to the present disclosure; Figure 2 yes Figure 1 An exploded view of a power distribution box is shown in FIG. Figure 3 is a schematic diagram of a housing exemplarily shown according to the present disclosure, wherein a portion of the position is truncated; Figure 4 yes Figure 3 A partial enlarged view of part A; Figure 5is a schematic diagram of a cooling plate exemplarily shown according to the present disclosure, wherein a portion of the position is truncated; Figure 6 yes Figure 5 A partial enlarged view of part B; Figure 7 yes Figure 1 A partial cross-sectional view of a distribution box is shown in FIG.

[0030] Description of Reference Numerals 1-shell; 11-annular flange; 12-reinforcement rib; 2-electrical component; 3-conductor; 31-external leakage part; 4-cooling plate; 41-upper edge; 42-installation groove; 51-first lug; 52-second lug; 53-installation gap; 6-seal; 61-seal ring; 7-refrigerant pipeline. DETAILED DESCRIPTION

[0031] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0032] In the present disclosure, unless otherwise stated, directional words such as "inside, outside", "up, down", "top, bottom" may refer to the structure of the corresponding component itself, or may be defined based on the direction in which the corresponding component is actually used. For example: the conductor at least partially extends to the "outside" of the shell to form an external leakage portion, where the "outside" of the shell refers to the outside of the housing space of the shell, such as the outside of its side wall, top wall or side wall; the external leakage portion is attached to the "outer" wall surface of the shell, which refers to the wall surface of the external leakage portion attached to the outside of the housing space of the shell; the external leakage portion is attached to the "bottom" wall of the shell, where the "bottom wall" refers to the wall surface of the shell facing the ground when the distribution box is in use; the "upper" edge of the cooling plate refers to the edge of the cooling plate away from the ground when the distribution box is in use, that is, the opening edge; the sealing member includes a sealing ring which is sleeved on the side wall of the shell and abuts against the "bottom surface" of the annular convex edge, where the "bottom surface" of the annular convex edge refers to the surface of the annular convex edge facing the ground when the distribution box is in use, and correspondingly, the "top surface" of the annular convex edge refers to the surface away from the ground; the bottom wall of the cooling plate is formed with a mounting groove which is "upwardly" recessed into the interior of the cooling plate, where "upward" refers to the direction away from the ground.

[0033] In addition, in the present disclosure, the terms "first", "second", etc. are used to distinguish one element from another element, and have no order or importance. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0034] Reference Figure 1-Figure 7, the present disclosure exemplarily shows a distribution box, including a housing 1, an electrical component 2 disposed in the housing 1, a conductor 3 connected to the electrical component 2, and a cooling plate 4 installed on the outside of the housing 1. The electrical component 2 may include a fuse, a relay, etc. The conductor 3 may be a copper bar, an aluminum bar, etc. The conductor 3 at least partially extends to the outside of the housing 1 to form an external leakage portion 31, and the cooling plate 4 is used to accommodate an insulating cooling medium so that the external leakage portion 31 is immersed in the insulating cooling medium. Here, "immersion" means that the entire external leakage portion 31 is directly in the insulating cooling medium, for example, when the insulating cooling medium is always in a liquid state, "immersion" means that the external leakage portion 31 is directly immersed in the liquid; when the insulating cooling medium is initially solid (such as paraffin), "immersion" means that the external leakage portion 31 is directly covered and contacted by the solid insulating cooling medium, and when the phase-change insulating cooling medium undergoes a phase change and becomes liquid, the external leakage portion 31 can still be directly immersed in the liquid.

[0035] “The conductor 3 at least partially extends to the outside of the shell 1” may specifically mean that the conductor 3 extends to the outside of the side wall of the shell 1, or may also extend to the outside of the bottom wall of the shell, etc., and the present disclosure does not limit this. Similarly, the cooling plate 4 may also be arranged on the outside of the bottom wall or side wall of the shell 1, and the position of the cooling plate 4 may be adaptively arranged according to the position of the leaking portion 31 of the conductor 3, so that the leaking portion 31 can be immersed in the insulating cooling medium. In the embodiment of the present disclosure, the cooling plate 4 may be welded to the outside of the shell 1, or may be screwed to the outside of the shell 1, and the present disclosure does not limit its specific installation method.

[0036] The present disclosure does not limit how the conductor 3 extends to the outside of the housing 1, and the conductor 3 may extend from the upper opening of the housing 1 and extend downward to the side wall or the bottom wall. Alternatively, in some other embodiments, the conductor 3 may also directly pass through the side wall or the bottom wall of the housing 1. In this case, the position on the housing 1 for the conductor 3 to pass through needs to be sealed to prevent the insulating cooling medium on the outside from entering the housing 1 of the distribution box through the gap.

[0037] It should be explained that the present disclosure does not limit the insulating cooling medium, which is in liquid form during heat exchange operation, so that the heat exchange efficiency can be improved through convection. It is mainly divided into two types, the first type is a liquid insulating cooling medium (such as cooling oil, which is initially liquid) or a phase-change insulating cooling medium (for example: paraffin, which is initially solid and becomes liquid during heat exchange). In the initial stage of cooling operation, the high heat capacity of the insulating cooling medium can prevent its temperature from rising too fast and too high. After the initial stage, since the insulating cooling medium is continuously heated by the leakage part 31, the insulating cooling medium can form liquid convection (physical convection), so that the continuous and efficient heat exchange between the leakage part 31 and the insulating cooling medium can be achieved through the convection of the insulating cooling medium. The heat convection heat exchange is more efficient than the traditional heat conduction speed, and it can also avoid the paradox of medium insulation and thermal conductivity. And especially when it is a phase-change insulating cooling medium, in the initial stage of absorbing heat from the external leakage part 31, its phase change (from solid to liquid) process can absorb a large amount of heat, thereby improving the heat exchange efficiency with the external leakage part 31, and then improving the cooling effect of the distribution box. After the phase change process is completed, it becomes a liquid insulating cooling medium, and further quickly exchanges heat through convection. The insulating cooling medium is in direct contact with the outer surface of the external leakage part 31, and can quickly absorb its heat to prevent the temperature from rising too fast and too high. It should be noted that when the concepts of liquid level height, upper liquid level, etc. are involved below, it refers to the liquid level when the insulating cooling medium is in liquid state. Even if it is a phase-change insulating cooling medium (initially solid), it will become liquid during heat exchange. This point will not be explained below.

[0038] By using the above technical solution, since the part of the conductor 3 inside the shell 1 is directly connected to the electrical component 2, the heat generated by the electrical component 2 can be directly and quickly transferred to the external leakage part 31 of the conductor 3 through the conductor 3, which is better than the traditional heat transfer through the insulating shell and air. In addition, a cooling plate 4 is installed on the outside of the shell 1, and the external leakage part 31 is immersed in the insulating cooling medium (contact heat exchange), so that the conductor 3 can be quickly cooled and cooled to avoid excessive temperature rise inside the distribution box, and the insulating cooling medium has good insulation performance, which is safe and reliable. Especially when the insulating cooling medium is in liquid form, the cooling plate 4 is arranged on the outside of the shell 1 to prevent the liquid cooling medium in the cooling plate 4 from being immersed in the shell 1 of the distribution box and causing damage to the electrical component 2, ensuring that the inside of the shell 1 of the distribution box is always in a relatively dry state, realizing dry-wet separation, and there is no need to develop special electrical components that can be completely immersed in the cooling medium, reducing costs.

[0039] Reference Figure 2-Figure 4In the embodiment of the present disclosure, the external leakage part 31 can be attached to the outer wall surface of the housing 1. Such a design facilitates the fixing of the external leakage part 31, and can occupy the outer space of the housing 1 to a minimum extent, thereby reducing the volume of the distribution box. Furthermore, when the cooling plate 4 is made of metal, the external leakage part 31 is fixed to the outer wall surface, which can reduce the possibility of contacting the cooling plate 4 to form an electrical reaction.

[0040] Reference Figure 2-Figure 4 In the embodiment of the present disclosure, the leaking portion 31 can be attached to the bottom wall of the shell 1, the cooling plate 4 can be constructed as a groove with one end open, and the bottom wall of the shell 1 can extend into the cooling plate 4, so that the leaking portion 31 located on the bottom wall can be immersed in the insulating cooling medium. In this case, the cooling plate 4 is the bottom shell installed on the lower side of the bottom wall of the shell 1, and the insulating cooling medium is located in the bottom shell, and there is no leakage problem when it is not shaking. If it is installed on the side wall of the shell 1, due to the deadweight of the insulating cooling medium, the insulating cooling medium will always act toward the sealing position at the bottom, the risk of leakage is relatively large, and the sealing requirement is relatively high.

[0041] Reference Figure 2 In the embodiment of the present disclosure, the electrical component 2 can be fixed to the side wall of the housing 1. Compared with the traditional design of fixing to the bottom wall of the housing 1, this design can avoid drilling holes in the bottom wall of the housing 1 and avoid the risk of the insulating cooling medium in the cooling plate 4 entering the housing 1 through the holes.

[0042] Reference Figure 1-Figure 7 In the embodiment of the present disclosure, at least two opposite side walls of the shell 1 may be respectively provided with a first lug 51, and the upper edge 41 of the cooling plate 4 may be provided with a second lug 52 for supporting the first lug 51, so that the leakage portion 31 is spaced from the bottom wall of the cooling plate 4. In the embodiment of the present disclosure, the number of the first lug 51 and the second lug 52 may be four respectively. During installation, the bottom wall of the shell 1 is extended from the open end of the cooling plate 4 until the first lug 51 and the second lug 52 fit in place to form a limit, which can prevent the bottom wall of the shell 1 from extending too deep and being too close to the cooling plate 4, thereby posing an electrical hazard. In addition, the first lug 51 and the second lug 52 can directly realize the detachable installation of the cooling plate 4 and the shell 1. In this case, it is necessary to set connection holes on the two lugs respectively.

[0043] In order to make the leaking part 31 always immersed in the insulating cooling medium, in the embodiment of the present disclosure, there can be an installation gap 53 between the side wall of the housing 1 and the side wall of the cooling plate 4, and the installation gap 53 is at least partially used to accommodate the insulating cooling medium. With such a design, when the insulating cooling medium (liquid or liquid after phase change) is injected into the cooling plate 4, it can be designed that the upper liquid level is higher than the bottom wall of the housing 1, that is, after filling the space below the leaking part 31 of the cooling plate 4, it continues to be injected into the installation gap 53, so that the leaking part 31 located on the bottom wall of the housing 1 can be ensured to be always immersed in the insulating cooling medium, even when the cooling plate 4 is tilted (within a certain angle range), it can also be ensured that the leaking part 31 is always immersed in the insulating cooling medium.

[0044] Further, refer to Figure 2 and Figure 7 In the embodiment of the present disclosure, a seal 6 may be provided at a position higher than the bottom wall of the housing 1 in the installation gap 53. The seal 6 may be designed to prevent the insulating cooling medium from overflowing due to shaking or the like.

[0045] The present disclosure does not limit the specific structure of the sealing member 6. Figure 2 and Figure 7 In the illustrated embodiment, the portion of the side wall of the housing 1 extending into the cooling plate 4 may be provided with an annular ridge 11, and the seal 6 may include a sealing ring 61 sleeved on the side wall of the housing 1, and the sealing ring 61 abuts against the bottom surface of the annular ridge 11. The annular ridge 11 may be integrally formed with the housing 1. During installation, the sealing ring 61 may be kept tightly against the bottom surface of the annular ridge 11 under the friction force of the side wall of the cooling plate 4, thereby preventing the sealing ring 61 from shifting during the installation process. In addition, in some other embodiments, the sealing ring 61 may also be replaced by sealant, sealing foam, etc.

[0046] It should be noted that when the insulating cooling medium (liquid or liquid after phase change) is injected, the upper liquid surface can be spaced apart from the sealing ring 61 to reserve some air. Such a design can have a better thermal convection effect than filling with insulating cooling medium, and proper shaking can improve the flow of the insulating cooling medium, thereby improving the heat exchange effect with the leakage part 31.

[0047] Reference Figure 7In the embodiment of the present disclosure, the height difference between the top surface of the annular ridge 11 and the upper edge 41 of the cooling plate 4 can be H1, wherein H1 ≥ 3 mm, specifically 3 mm, 4 mm, 5 mm, etc. By setting this height difference, it can be ensured to a certain extent that the insulating cooling medium will not overflow from the upper edge 41 of the cooling plate 4 when the seal 6 fails (overflow requires more violent shaking). This height difference is a redundant design. It should be explained that the "upper edge 41" here refers to the edge of the open end of the cooling plate 4, that is, the highest point where the cooling plate 4 can accommodate the liquid level of the insulating cooling medium.

[0048] In order to ensure the sealing effect of the sealing ring 61, in the embodiment of the present disclosure, the compression amount of the sealing ring 61 in the direction from the side wall of the shell 1 to the corresponding side wall of the cooling plate 4 can be L, where L≥2mm, specifically 2mm, 3mm, 4mm, etc.

[0049] Reference Figure 7 In the embodiment of the present disclosure, the liquid level of the insulating cooling medium may be h, the height difference between the lowest point of the bottom wall of the cooling plate 4 and the outer surface of the bottom wall of the shell 1 is H3, and the height difference between the lowest point of the bottom wall of the cooling plate 4 and the lower surface of the sealing member 6 is H2, wherein (H3+5) mm≤h≤(H2-10) mm. Among them, h≥(H3+5) mm means that when the cooling plate 4 is in a stationary and horizontal state, the upper liquid level of the insulating cooling medium is higher than the outer surface of the bottom wall of the shell 1 and the difference is greater than or equal to 5 mm, such as 5 mm, 6 mm, etc., so as to ensure that when the cooling plate 4 is within a certain tilt range (for example, the distribution box is used for a vehicle, the vehicle is parked on a slope, etc.), the leaking portion 31 can still be completely immersed in the insulating cooling medium. h≤(H2-10)mm means that when the cooling plate 4 is in a stationary and horizontal state, the distance between the upper liquid surface of the insulating cooling medium and the lower surface of the seal 6 is greater than or equal to 10mm, such as 10mm, 11mm, etc., thereby ensuring that when the cooling plate 4 is in a certain shaking range (such as vehicle bumps) or in a certain tilt range, the insulating cooling medium cannot contact the seal 6, thereby reducing the risk of overflow of the insulating cooling medium.

[0050] It should be explained that, in the embodiment of the present disclosure, the bottom wall of the cooling plate 4 can be constructed as an uneven structure (for example, with an upwardly protruding mounting groove mentioned below). The lowest point refers to the position of the bottom wall of the cooling plate 4 farthest from the bottom wall of the housing 1, for example, it can be a plane. Correspondingly, the highest point of the bottom wall of the cooling plate 4 mentioned below refers to the position of the bottom wall of the cooling plate 4 closest to the bottom wall of the housing 1, which can be a plane, or a curve, etc.

[0051] Reference Figure 2 and Figure 3In the embodiment of the present disclosure, the bottom wall of the housing 1 may be formed with a reinforcing rib 12 protruding toward the bottom wall of the cooling plate 4, and the portion of the external leakage portion 31 corresponding to the reinforcing rib 12 may be sandwiched between the bottom wall of the housing 1 and the reinforcing rib 12. By providing the reinforcing rib 12, the external leakage portion 31 of the conductor 3 can be better fixed so that it is sandwiched between the reinforcing rib 12 and the bottom wall of the housing 1. In addition, when the cooling plate 4 is made of metal material, the reinforcing rib 12 can ensure the electrical gap between the external leakage portion 31 and the cooling plate 4 in extreme cases. The reinforcing rib 12 can be integrally injection molded with the housing 1, or it can also be realized by assembly.

[0052] Further, in the embodiments of the present disclosure, referring to Figure 7 The height difference between the lower surface of the external leakage part 31 and the lower surface of the reinforcing rib 12 can be H6, where H6 ≥ 3mm, such as 3mm, 4mm, 5mm, etc. The height difference can ensure the gap between the external leakage part 31 and the bottom wall of the cooling plate 4, thereby avoiding electrical reaction when they are too close.

[0053] In order to ensure that the highest point of the bottom wall of the cooling plate 4 and the reinforcing rib 12 of the housing 1 have assembly contact interference in the height direction, in the embodiment of the present disclosure, the height difference between the lower surface of the external leakage portion 31 and the highest point of the bottom wall of the cooling plate 4 can be H5, wherein H5-H6 ≥ 3mm, for example, can be 3mm, 4mm, 5mm, etc. Here, H5-H6 is the gap between the lower surface of the reinforcing rib 12 and the highest point of the bottom wall of the cooling plate 4, so as to avoid interference during the installation process.

[0054] Reference Figure 7 In the embodiment of the present disclosure, the height difference between the lower surface of the external leakage portion 31 and the lowest point of the bottom wall of the cooling plate 4 can be H4, where H4≤20mm, such as 20mm, 15mm, 10mm, etc. The maximum value of the height difference is limited to avoid an increase in the convection distance of the insulating cooling medium and an increase in the amount of the insulating cooling medium, which is beneficial to improving the heat exchange efficiency and lightweighting of the distribution box.

[0055] In the embodiment of the present disclosure, the conductor 3 and the housing 1 can be integrally molded. In addition, in some other embodiments, the conductor 3 and the housing 1 can also be bonded to form a whole, which is not limited in the present disclosure.

[0056] Reference Figure 2 , Figure 5-Figure 6In the embodiment of the present disclosure, the bottom wall of the cooling plate 4 may be provided with a refrigerant pipeline 7 for the flow of refrigerant. The insulating cooling medium can transfer the heat of the conductor 3 to the cooling plate 4 after absorbing it. Then, by providing the refrigerant pipeline 7, the flowing refrigerant can absorb the heat of the cooling plate 4 when passing through the cooling plate 4, and take the heat away when flowing away, thereby avoiding the over-high temperature of the cooling plate 4, which may lead to a decrease in the heat exchange efficiency between the leaking part 31 and the insulating cooling medium.

[0057] Reference Figure 5 and Figure 6 In an embodiment of the present disclosure, the bottom wall of the cooling plate 4 may be formed with a mounting groove 42 that is recessed upward into the interior of the cooling plate 4, and the refrigerant pipeline 7 may be installed in the mounting groove 42. By such a design, the contact area between the refrigerant pipeline 7 and the cooling plate 4 may be increased, thereby improving the heat exchange efficiency. The structure of the mounting groove 42 may be formed integrally with the cooling plate 4. In this embodiment, the inner contour of the mounting groove 42 may be a circular arc segment, thereby increasing the contact area with the refrigerant pipeline 7.

[0058] In this embodiment, the top of the mounting groove 42 is the highest point (curve) of the bottom wall of the cooling plate 4, and the rest of the bottom wall of the cooling plate 4 is the lowest point (plane) of the bottom wall.

[0059] Further, in the embodiment of the present disclosure, a heat conducting part may be provided between the mounting groove 42 and the refrigerant pipe 7. The heat conducting part may increase the heat exchange efficiency between the refrigerant pipe 7 and the cooling plate 4. The present disclosure does not limit the heat conducting part, for example, it may be a heat conducting structural adhesive, which may effectively fill the gap between the refrigerant pipe 7 and the mounting groove 42, thereby further increasing the heat conduction heat exchange area and improving the heat exchange efficiency.

[0060] In the embodiment of the present disclosure, the cooling plate 4 can be made of metal material. The metal material can not only achieve efficient heat exchange, but also has excellent structural strength to prevent the insulating cooling medium from overflowing and leaking, thereby improving the reliability of the system structure. When the cooling plate 4 is made of metal material, the refrigerant pipeline 7 can also be made of metal material, and the refrigerant pipeline 7 and the cooling plate 4 can be connected by brazing.

[0061] According to a second aspect of the present disclosure, a battery pack is provided, comprising the above-mentioned power distribution box. Since the battery pack has all the beneficial effects of the above-mentioned power distribution box, they are not described in detail here.

[0062] According to a third aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned battery pack. Since the vehicle has all the beneficial effects of the above-mentioned battery pack, they are not described in detail here.

[0063] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0064] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0065] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A distribution box, characterized in that: include: case; An electrical component is disposed in the housing; A conductor connected to the electrical component, and at least part of the conductor extends to the outside of the housing to form an external leakage portion; as well as A cooling plate is installed on the outer side of the shell, and is used to contain an insulating cooling medium so that the leaking part is immersed in the insulating cooling medium.

2. The power distribution box according to claim 1, characterized in that: The external leakage part is attached to the outer wall surface of the shell.

3. The power distribution box according to claim 2, characterized in that: The externally leaking portion is attached to the bottom wall of the shell, the cooling plate is constructed in the shape of a groove with one end open, and the bottom wall of the shell extends into the cooling plate.

4. The power distribution box according to claim 3, characterized in that: The electrical components are fixed to the side walls of the housing.

5. The power distribution box according to claim 3, characterized in that: At least two opposite side walls of the shell are respectively provided with first lugs, and the upper edge of the cooling plate is provided with second lugs for supporting the first lugs, so that the leaking portion is spaced apart from the bottom wall of the cooling plate.

6. The power distribution box according to claim 3, characterized in that: An installation gap is provided between the side wall of the shell and the side wall of the cooling plate, and the installation gap is at least partially used to accommodate the insulating cooling medium.

7. The power distribution box according to claim 6, characterized in that: A sealing member is arranged at a position in the installation gap higher than the bottom wall of the housing.

8. The power distribution box according to claim 7, characterized in that: The portion of the side wall of the shell extending into the cooling plate is provided with an annular convex edge, and the sealing member comprises a sealing ring sleeved on the side wall of the shell, and the sealing ring abuts against the bottom surface of the annular convex edge.

9. The power distribution box according to claim 8, characterized in that: A height difference between the top surface of the annular convex edge and the upper edge of the cooling plate is H1, wherein H1≥3 mm.

10. The power distribution box according to claim 8, characterized in that: In the direction from the side wall of the housing to the corresponding side wall of the cooling plate, the compression amount of the sealing ring is L, wherein L≥2 mm.

11. The power distribution box according to claim 7, characterized in that: The liquid level of the insulating cooling medium is h, the height difference between the lowest point of the bottom wall of the cooling plate and the outer surface of the bottom wall of the shell is H3, and the height difference between the lowest point of the bottom wall of the cooling plate and the lower surface of the seal is H2, wherein (H3+5) mm≤h≤(H2-10) mm.

12. The power distribution box according to claim 3, characterized in that: The bottom wall of the shell is formed with a reinforcing rib protruding toward the bottom wall of the cooling plate, and a portion of the externally exposed portion corresponding to the reinforcing rib is sandwiched between the bottom wall of the shell and the reinforcing rib.

13. The power distribution box according to claim 12, characterized in that: A height difference between a lower surface of the exposed portion and a lower surface of the reinforcing rib is H6, wherein H6≥3 mm.

14. The power distribution box according to claim 13, characterized in that: The height difference between the lower surface of the leaking portion and the highest point of the bottom wall of the cooling plate is H5, wherein H5-H6≥3mm.

15. The power distribution box according to claim 3, characterized in that: The height difference between the lower surface of the leaking portion and the lowest point of the bottom wall of the cooling plate is H4, wherein H4≤20mm.

16. The power distribution box according to claim 1, characterized in that: The conductor is integrally insert-molded with the housing.

17. The power distribution box according to any one of claims 1 to 16, characterized in that: The bottom wall of the cooling plate is provided with a refrigerant pipeline, and the refrigerant pipeline is used for supplying refrigerant flow.

18. The power distribution box according to claim 17, characterized in that: The bottom wall of the cooling plate is formed with an installation groove which is recessed upward into the interior of the cooling plate, and the refrigerant pipeline is installed in the installation groove.

19. The power distribution box according to claim 18, characterized in that: A heat conducting portion is provided between the mounting groove and the refrigerant pipeline.

20. The power distribution box according to claim 17, characterized in that: The cooling plate is made of metal material.

21. A battery pack, characterized in that: Comprising the distribution box described in any one of claims 1-20.

22. A vehicle, characterized in that: Comprising the battery pack as claimed in claim 21.

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