Power distribution box and manufacturing method therefor

Abstract

A power distribution box and a manufacturing method therefor. The power distribution box comprises a main body and a housing body, and the housing body is formed by via solidification of a potting adhesive, where the potting adhesive surrounds the main body.

Description

Distribution box and manufacturing method thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application filed on December 29, 2023, with application number 202311862062.9 and application name “Distribution box and its manufacturing method”, all contents of which are incorporated by reference into this application. Technical Field

[0003] The present invention relates to the technical field of distribution boxes, and in particular to a distribution box and a manufacturing method thereof. Background Art

[0004] As the intermediate carrier for the input and output of electrical energy and information data exchange in the battery pack, the insulation safety, integration and thermal performance of the distribution box need to be paid close attention.

[0005] The existing technology mostly adopts conventional electrical insulation measures, and the main defect of the existing technology is low insulation safety.

[0006] Summary of the Invention

[0007] The purpose of the present invention is to provide a distribution box and a manufacturing method thereof, so as to solve the problem of low insulation safety of the distribution box.

[0008] To achieve the purpose of the present invention, the present invention provides the following technical solutions:

[0009] In a first aspect, the present invention provides a distribution box, comprising:

[0010] main body;

[0011] The shell is formed by solidifying the potting glue, and the potting glue surrounds the main body.

[0012] In one embodiment, the main body includes a plurality of components arranged at intervals, and the potting compound further fills first gaps between adjacent components.

[0013] In one embodiment, the size of the first gap is d, which satisfies: d≥0.4 mm.

[0014] In one embodiment, the distribution box further includes a connector, which is connected to the main body and electrically conductive, and at least a portion of the connector is located outside the shell.

[0015] In one embodiment, the connecting member includes a plug and / or a metal sheet.

[0016] In a second aspect, the present invention provides a method for manufacturing a distribution box, comprising:

[0017] Providing a mold, wherein the mold has a receiving cavity;

[0018] accommodating the main body in the accommodating cavity;

[0019] injecting a potting compound into the receiving cavity, wherein the potting compound surrounds the main body;

[0020] After the potting compound solidifies, the mold is removed, and the solidified potting compound forms a shell.

[0021] In one embodiment, the viscosity of the potting compound is η, which satisfies: η≤3500 mPa.s.

[0022] In one embodiment, the density of the potting compound after curing is ρ, which satisfies: ρ≤1.50g / cm 3 .

[0023] In one embodiment, the thermal conductivity of the potting compound after curing is a, which satisfies the following conditions: a≥0.6 W / mK.

[0024] In one embodiment, the tensile strength of the potting glue after curing is b, which satisfies: b≥15 MPa; the elongation at break of the potting glue after curing is c, which satisfies: c≥5%.

[0025] In one embodiment, the specific heat capacity of the potting compound after curing is e, which satisfies the following condition: e≥1000 J / kg·°C.

[0026] The distribution box of the present invention is provided with a main body and a shell formed by solidifying a potting glue, and the potting glue surrounds the main body, completely insulating the electrical connection positions in the main body, avoiding the risk of arcing and fire caused by exposure of conductive parts under harsh working conditions, and improving the insulation safety of the distribution box. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] FIG1 is a perspective view of a distribution box according to an embodiment;

[0029] FIG2 is a cross-sectional view of a distribution box according to an embodiment;

[0030] FIG3 is a perspective view of a distribution box and a mold according to an embodiment;

[0031] FIG4 is an exploded view of a distribution box and a mold according to an embodiment;

[0032] FIG5 is a flow chart of a method for manufacturing a distribution box according to an embodiment.

[0033] Explanation of reference numerals: 100 - distribution box, 10 - main body, 11 - components, 12 - circuit board, 20 - housing, 30 - connector, 40 - mold, 41 - handle, 42 - first mold, 421 - first mold cavity, 422 - injection hole, 43 - second mold, 432 - second mold cavity. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be an intermediate component.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0038] Existing technologies mostly use conventional electrical insulation measures, such as air isolation, insulation baffle isolation, copper busbar insulation material coating, etc., in order to ensure the electrical clearance and creepage distance required by relevant standards (such as UL 2580, IEC 60664, etc.). The main defect of the existing technology is that the electrical connection position is not completely insulated, and there are still conductive parts exposed. Under severe working conditions such as thermal runaway, leakage, and water ingress in the battery pack, there is a risk of arcing and fire caused by the increase of conductive media. Because the existing technology must meet relevant safety requirements such as electrical clearance and creepage distance, it is difficult to arrange high-voltage components in small spaces and with multiple circuits, and the volume power density of the distribution box is often lower than 40W / cm 3, resulting in low space utilization. Under current technology, distribution boxes are placed in confined spaces with no air circulation and no active cooling measures. This means they can only slowly radiate heat to the surrounding area. Under overload or high-power charging conditions, high-voltage components face the risk of overheating. To meet insulation coordination requirements, the limited space in the distribution box prevents the use of copper busbars with larger cross-sections to reduce resistance and aid heat dissipation, further leading to overheating of the distribution box.

[0039] 1 and 4 , the present invention provides a distribution box 100 , comprising a main body 10 and a shell 20 . The shell 20 is formed by solidifying a potting compound, and the potting compound surrounds the main body 10 .

[0040] The potting compound is an insulating and sticky material, and may be epoxy resin potting compound, silicone potting compound, polyurethane potting compound, polyacrylate potting compound, electronic potting gel, etc., without limitation.

[0041] The electrical clearance is the shortest spatial distance measured between two conductive parts or between a conductive part and the protective interface of the equipment, that is, the shortest distance that can be insulated through the air while ensuring stable and safe electrical performance; the creepage distance is the phenomenon that the insulating material around the conductor becomes charged due to the polarization of the insulating material. The radius of this charged area is the creepage distance.

[0042] The distribution box 100 of the present invention is provided with a main body 10 and a shell 20 formed by solidifying the potting glue. After the potting glue solidifies, it fixes the main body 10, and the fixed structure in the main body 10 can be removed. It can reasonably avoid the requirements for electrical clearance and creepage distance in the insulation coordination standard, and can improve the space utilization of the distribution box 100.

[0043] The potting glue in the distribution box 100 of the present invention tightly surrounds and completely insulates the electrical connection positions in the main body 10, avoiding the risk of arcing and fire caused by exposed conductive parts under harsh working conditions, and improving the insulation safety of the distribution box 100.

[0044] In the prior art, the distribution box 100 is provided with a shell. The present invention uses potting glue to form the shell 20, which saves the production cost of the shell. The time required for the shell design accounts for more than 50% of the total design time of the distribution box 100. The present invention can greatly shorten the design time, reduce the workload, and reduce the development cost.

[0045] 2 , in one embodiment, the main body 10 includes a plurality of spaced-apart components 11 , and the potting compound further fills first gaps between adjacent components 11 .

[0046] The main body further includes a circuit board 12 , and a plurality of components 11 are arranged at intervals on the circuit board 12 .

[0047] The components 11 may include contactors, copper bars, cables, busbars, fuses, insulators, wiring terminals, cable management troughs, etc., without limitation.

[0048] The contactor is used to determine whether the distribution box 100 is electrically connected to the outside world; the copper busbars include the neutral busbar and the ground busbar, etc., which are used for wiring; the cables are used as conductors; the busbar can be a copper conductor, an aluminum conductor, etc., without restriction, and is used to distribute current, voltage, etc. to each sub-switch.

[0049] The first gap is the spacing distance between two adjacent components 11 .

[0050] Different types of components 11 are used to meet the use requirements of the distribution box 100, and the components 11 arranged at intervals must meet the requirements of the insulation coordination standard for electrical clearance and creepage distance.

[0051] In one embodiment, the size of the first gap is d, which satisfies: d≥0.4 mm.

[0052] d can be 0.4mm, 0.5mm, 0.8mm, 1mm, etc. without limitation.

[0053] The first gap must meet the electrical clearance and creepage distance requirements of the relevant standard (UL 2580).

[0054] When d is less than 0.4 mm, the first gap between the components 11 is too small, which is smaller than the electrical clearance and creepage distance of the relevant standards. Air insulation cannot be achieved between adjacent components 11, and the insulating material is easily charged, resulting in poor insulation safety of the distribution box 100.

[0055] When d≥0.4 mm, the first gap between the components 11 meets the electrical clearance and creepage distance of the relevant standards, air insulation is achieved between the components 11, the insulating material is not charged, and the insulation safety of the distribution box 100 is good.

[0056] 1 and 2 , in one embodiment, the distribution box 100 further includes a connector 30 , which is connected to the main body 10 and electrically conductive, and at least a portion of the connector 30 is located outside the housing 20 .

[0057] One end of the connector 30 is connected to the main body 10 and is electrically connected thereto, and the other end of the connector 30 is disposed outside the housing 20 for electrically connecting thereto so that the distribution box 100 can operate normally.

[0058] In one embodiment, the connecting member 30 includes a plug and / or a metal sheet.

[0059] The connector may be a circular connector (a connector with a circular basic structure and a circular mating surface), a rectangular connector (a connector with a rectangular basic structure and a rectangular or trapezoidal mating surface), etc., without limitation.

[0060] The fixing method of the plug can be a crimping plug, a welding plug, a wrapping plug, a surface mount plug, etc., without limitation.

[0061] The connector may include a socket and a plug, and the connection method between the socket and the plug may be a snap connection (a connector with a curved groove and a bayonet pin connection structure that is locked by a small amount of rotation), a straight plug (a connector with a push-pull connection structure that is directly plugged in by pushing), a lock (a connector with a lock and a three-head threaded connection structure that is locked by 90° rotation), a screw connection (a connector with a threaded structure that is screwed together by rotation), etc., without limitation.

[0062] The metal sheet can be an aluminum sheet, a copper sheet, etc., without limitation.

[0063] A connector plug and / or a metal sheet is provided as a connector 30 to electrically connect the distribution box 100 to the outside world so that the distribution box 100 can operate normally.

[0064] In one embodiment, the distribution box 100 further includes an insulating bracket, which is connected to the main body 10 , and at least a portion of the insulating bracket is located outside the shell 20 .

[0065] The insulating bracket can be made of a plastic with a certain strength. The insulating bracket is provided with a first connection hole and a second connection hole spaced apart. Component 11 is connected and fixed to the insulating bracket through the first connection hole, and the tray is connected and fixed to the insulating bracket through the second connection hole. The insulating bracket and component 11 can be connected by screwing, clamping, welding, etc., without limitation. The insulating bracket and tray can be connected by screwing, clamping, welding, etc., without limitation.

[0066] The insulating bracket can make up for the vacant installation point after the shell is removed, and achieve the same installation and fixing effect.

[0067] 3, 4 and 5, the present invention provides a method for manufacturing a distribution box 100, comprising:

[0068] Step S10, providing a mold 40, wherein the mold 40 has a receiving cavity;

[0069] Step S20, receiving the main body 10 in the receiving cavity;

[0070] Step S30, injecting potting glue into the receiving cavity, and the potting glue surrounds the main body 10;

[0071] In step S40 , after the potting compound solidifies, the mold 40 is removed, and the solidified potting compound forms the housing 20 .

[0072] In step S10, the mold 40 is a material with high structural strength, specifically metal materials, high-strength plastics, ceramics, etc. Metal materials include aluminum, aluminum alloys, magnesium alloys, iron and iron alloys, etc. The mold 40 can be an integrated structure, that is, the bottom plate and the side plates are an integrated structure made by an integrated molding process, and the integrated molding process can be specifically stamping, casting, etc., without limitation. The mold 40 can also be a split structure, and the side plates and the bottom plate can be connected and fixed by welding, bonding, clamping, screwing, etc. The wall thickness of the mold 40 can be roughly uniform, that is, the thickness of the side plates can be roughly uniform, and the thickness of the bottom plate and the side plates can also be roughly the same. The opening of the receiving cavity is located at the top of the mold 40.

[0073] In step S10, the mold 40 may also be provided with a handle 41 for easy disassembly. The mold 40 includes a first mold 42 and a second mold 43. The first mold 42 is provided with a first mold cavity 421, and the second mold 43 is provided with a second mold cavity 432. The first mold cavity 421 and the second mold cavity 432 together form a receiving cavity.

[0074] In step S20 , when the main body 10 is placed in the receiving cavity, the plurality of components 11 need to be spaced apart, and the spaced apart components 11 need to meet the requirements of the insulation coordination standard for electrical clearance and creepage distance.

[0075] The first mold 42 is further provided with a liquid injection hole 422 . In step S30 , the potting compound is injected into the receiving cavity through the liquid injection hole 422 .

[0076] In step S30, the potting compound can be injected using a professional electronic potting machine. Potting compounds can be epoxy resins, addition-type silicones, or other materials. These machines can be either mixing or vacuum potting devices, which are convenient and fast. When preparing the potting compound, heat and mix it. Stir the mixture in a clockwise direction at a constant speed, avoiding intermittent mixing. The pouring speed should also be consistent to avoid bubbles.

[0077] In step S30 , the direction of injecting the potting compound may be from the top of the receiving cavity to the bottom of the receiving cavity.

[0078] In step S40 , the solidification time of the potting glue can be 35 minutes, which is conducive to assembly line production.

[0079] The distribution box 100 manufactured includes a main body 10 and a shell 20, and the shell 20 is formed by solidifying the potting glue, which can reasonably avoid the requirements for electrical clearance and creepage distance in the insulation matching standard, further improving the space utilization of the distribution box 100, and the potting glue is tightly surrounded, and the electrical connection position in the main body 10 is completely insulated, avoiding the risk of arcing and fire caused by exposure of conductive parts under harsh working conditions, and improving the insulation safety of the distribution box 100.

[0080] In one embodiment, the viscosity of the potting compound is η, which satisfies η≤3500 mPa.s.

[0081] η can be 2500mPa.s, 2800mPa.s, 3000mPa.s, 3300mPa.s, 3500mPa.s, etc., without limitation.

[0082] When η>3500mPa.s, the potting compound has excessive viscosity, resulting in poor fluidity when injected into the cavity. If the construction temperature is high, the potting compound may not be fully sealed at the edges of the cavity before it has solidified. Adjusting the surface thickness of the potting compound is impossible, and unevenness may occur after solidification. It may even be difficult to completely seal the edges of the cavity. Furthermore, high-viscosity potting compound is difficult to remove bubbles. When η≤3500mPa.s, the potting compound has good fluidity, which helps adjust the surface flatness during the injection process.

[0083] In one embodiment, the density of the potting compound after curing is ρ, which satisfies: ρ≤1.50g / cm 3 .

[0084] ρ can be 1.50g / cm 3 , 1.40g / cm 3 , 1.30g / cm 3 , 1.20g / cm 3 etc., no restrictions.

[0085] ρ>1.50g / cm 3 When the density of the cured potting compound is too high, the mass of the potting compound is large, which is not conducive to lightweighting of the product. ρ≤1.50g / cm 3 When the potting compound is cured, the density is low, which is beneficial to the lightweight of the product.

[0086] In one embodiment, the thermal conductivity of the cured potting compound is a, which satisfies the following condition: a≥0.6 W / mK.

[0087] a can be 0.6W / mK, 0.8W / mK, 0.9W / mK, 1.0W / mK, 1.2W / mK, etc. without limitation.

[0088] When a is less than 0.6W / mK, the thermal conductivity of the potting compound is too small, and the component 11 cannot transfer heat after heating up. The heat dissipation performance of the distribution box 100 is poor, and some high-voltage components 11 are at risk of overheating under overload or high-power charging conditions, causing the distribution box 100 to overheat.

[0089] When a≥0.6W / mK, the potting compound has good thermal conductivity, and the heating problem of the component 11 is greatly alleviated. At the same time, the length and cross-sectional area of ​​the copper busbar in the distribution box 100 can be reduced, thereby improving the space utilization of the distribution box 100 while still ensuring the current carrying demand of the distribution box 100. The present invention can well adapt to the increasing demand for high-power charging and discharging.

[0090] In one embodiment, the tensile strength of the potting adhesive after curing is b, which satisfies: b≥15 MPa, and the elongation at break of the potting adhesive after curing is c, which satisfies: c≥5%.

[0091] b can be 15MPa, 20MPa, 25MPa, 30MPa, 50MPa, etc. without limitation.

[0092] c can be 5%, 10%, 15%, 20%, 25%, etc., without limitation.

[0093] b<15MPa, the tensile strength of the potting glue after solidification is small, and the toughness of the shell 20 formed after the potting glue solidifies is poor, which cannot absorb the vibration energy transmitted from the vehicle body to the distribution box 100 under daily working conditions, and may damage the components 11 in the distribution box 100.

[0094] When c is less than 5%, the elongation at break of the potting compound is small, and the shell 20 formed after the potting compound solidifies is prone to cracking, which is detrimental to the structural stability of the interior of the distribution box 100 and the overall structural stability of the distribution box 100.

[0095] When b≥15MPa, the tensile strength of the potting glue is large, and the shell 20 formed after the potting glue solidifies has a certain toughness, which can absorb part of the vibration energy transmitted from the vehicle body to the distribution box 100 under daily working conditions, and can protect the components 11 in the distribution box 100.

[0096] When c≥5%, the elongation at break of the potting compound is large, and the shell 20 formed after the potting compound solidifies is less likely to crack, thereby ensuring the structural stability of the interior of the distribution box 100 and the overall structural stability of the distribution box 100.

[0097] In one embodiment, the specific heat capacity of the potting compound after curing is e, which satisfies the following condition: e≥1000 J / kg·°C.

[0098] e can be 1000 J / kg·℃, 1100 J / kg·℃, 1200 J / kg·℃, 1300 J / kg·℃, etc. without limitation.

[0099] When e is less than 1000 J / kg·℃, the heat dissipation performance of the potting compound is poor, the components 11 transfer less heat after heating, the heat dissipation performance of the distribution box 100 is poor, and some high-voltage components 11 are at risk of overheating under overload or high-power charging conditions, causing the distribution box 100 to overheat.

[0100] When e≥1000J / kg·℃, the heat dissipation performance of the potting compound is good, and the high temperature problem of the component 11 is greatly alleviated. At the same time, the length and cross-sectional area of ​​the copper busbar in the distribution box 100 can be reduced, thereby improving the space utilization of the distribution box 100 while still ensuring the current carrying demand of the distribution box 100. The present invention can well adapt to the increasing demand for high-power charging and discharging.

[0101] In one embodiment, the hardness of the potting glue is 85±5 Shore D. Specifically, the hardness of the potting glue may be 80 Shore D, 83 Shore D, 85 Shore D, 88 Shore D, 90 Shore D, and the like.

[0102] When the hardness of the potting compound is less than 80 Shore D, the shell 20 formed by the solidification of the potting compound is too soft, and the shell 20 is highly deformable, which may cause damage to the components 11; when the hardness of the potting compound is greater than 90 Shore D, the shell 20 formed by the solidification of the potting compound is too hard and cannot absorb part of the vibration energy transmitted from the vehicle body to the distribution box 100 during daily operating conditions; when the hardness of the potting compound is between 80 Shore D and 90 Shore D, while ensuring the strength of the shell 20 itself, it can also absorb part of the vibration energy transmitted from the vehicle body to the distribution box 100 during daily operating conditions.

[0103] In one embodiment, the surface resistivity of the potting compound is N1, which satisfies the following conditions: N1>1.0×10 10 Ω; the volume resistivity of the potting compound is N2, which satisfies: N2>1.0×10 10 Ω.cm.

[0104] N1 can be 1.5×10 10 Ω, 2.0×10 10 Ω, 2.5×10 10 Ω、3.0×10 10 Ω、3.5×10 10 Ω, etc., no restrictions.

[0105] N2 can be 1.5×10 10 Ω.cm、2.0×10 10 Ω.cm、2.5×10 10 Ω.cm、3.0×10 10 Ω.cm、3.5×10 10 Ω.cm, etc., without restriction.

[0106] When N1≤1.0×10 10 Ω.cm, the surface resistivity of the potting compound is small, and the surface conductivity of the potting compound is good, which is not conducive to the insulation effect of the housing 20; when N1>1.0×1010 When the surface resistivity of the potting compound is greater than Ω.cm, the surface conductivity of the potting compound is greater, which is beneficial to the insulation effect of the housing 20 .

[0107] When N2≤1.0×10 10 Ω.cm, the volume resistivity of the potting compound is small, and the efficiency of the material as an electrical insulating component is low; when N2>1.0×10 10 When the volume resistivity of the potting compound is greater than Ω.cm, the potting compound has a high efficiency as an electrical insulating component.

[0108] In one embodiment, the potting glue can withstand a high temperature of 400° C. without melting. Under high temperatures (such as the thermal diffusion process), the internal insulation safety and structural integrity of the distribution box 100 can be better ensured.

[0109] In one embodiment, the flame retardant grade of the potting compound is V0, that is, after two 10-second combustion tests on the potting compound, the flame is extinguished within 30 seconds and no burning materials fall, indicating that the potting compound has good flame retardant properties and the distribution box 100 is highly safe to use.

[0110] Table 1 shows the specific parameter requirements of the potting compound and the corresponding test standards.

[0111] Table 1

[0112] The distribution box 100 of the present invention is provided with a main body 10 and a shell 20 formed by solidifying a potting compound, and the potting compound surrounds the main body 10, saving the production cost of the shell. The present invention can greatly shorten the design time, reduce the workload, and reduce the development cost. The distribution box 100 of the present invention uses potting compound to surround the main body 10, which can reasonably circumvent the requirements for electrical clearance and creepage distance in the insulation matching standard, further improving the space utilization rate of the distribution box 100. The potting compound surrounds tightly, completely insulating the electrical connection position in the main body 10, avoiding the risk of arcing and fire caused by the exposure of conductive components under harsh working conditions, and improving the insulation safety of the distribution box 100. Adjusting parameters such as the thermal conductivity of the potting compound can reduce the use of copper busbars in the components 11. The length and cross-sectional area of ​​the copper busbars are reduced, and the current carrying requirements of the distribution box 100 system can still be guaranteed. The distribution box 100 of the present invention does not require shell design, which can save the cost of the shell and its mold, greatly shortening the design time, reducing the workload, and reducing development costs.

[0113] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" is based on the orientation or positional relationship described in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0114] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of the rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A distribution box (100), characterized in that, Comprising: A main body (10); A housing (20) formed by the solidification of potting glue, the potting glue surrounding the main body (10).

2. The distribution box according to claim 1, wherein, The main body (910) includes a plurality of components (11) arranged at intervals, and the potting glue also fills a first gap between adjacent components (11).

3. The distribution box according to claim 2, wherein, The size of the first gap is d, satisfying: d≥0.4mm.

4. The distribution box (100) according to claim 1, characterized in that, The distribution box (100) further includes a connector (30), the connector (30) is connected to the main body (10) and electrically conductive, and at least a part of the connector (30) is located outside the housing (20).

5. The distribution box (100) according to claim 4, characterized in that, The connector (30) includes a plug and / or a metal sheet.

6. A manufacturing method of a distribution box, characterized in that, Comprising: Providing a mold having a receiving cavity; Receiving the main body in the receiving cavity; Injecting potting glue into the receiving cavity, the potting glue surrounding the main body; After the potting glue solidifies, removing the mold, and the solidified potting glue forms a housing.

7. The manufacturing method of the distribution box according to claim 6, characterized in that, The viscosity of the potting glue is η, satisfying: η≤3500mPa.s.

8. The manufacturing method of the distribution box according to claim 6, characterized in that, The density of the potting adhesive after curing is ρ, satisfying: ρ ≤ 1.50 g / cm 3 .

9. The manufacturing method of the distribution box according to claim 6, characterized in that The thermal conductivity of the potting glue after curing is a, satisfying: a≥0.6W / m.K.

10. The manufacturing method of the distribution box according to claim 6, characterized in that, The tensile strength of the potting glue after curing is b, satisfying: b≥15MPa, and the elongation at break of the potting glue after curing is c, satisfying: c≥5%.

11. The manufacturing method of the distribution box according to claim 6, characterized in that, The specific heat capacity of the potting glue after curing is e, satisfying: e≥1000J / kg·℃.

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