CN116528535A - Electric connector assembly structure, distribution box and preparation method of distribution box - Google Patents

Abstract

The invention provides an electric connector assembly structure, a distribution box and a preparation method thereof, wherein the electric connector assembly structure comprises an electric connector and a shell, the electric connector and the shell are in an injection molding integrated structure, the electric connector comprises a first part and at least one second part, the shell comprises a shell body and a fixing part, and the first part is attached to the outer wall of the shell body; the second part is formed by stamping the first part, protrudes into the shell body to form a groove, penetrates through the shell body, is provided with a notch at one side, and is used for connecting an electric element; the shell body extends into the groove through the notch to form a fixing part. According to the structure, the electric connecting piece and the shell are in an integrated structure through injection molding, the second part of the electric connecting piece stretches into the shell, and the first part is positioned on the outer side of the shell, so that when the electric connecting piece and the electric element generate heat due to transmission current, heat can be emitted to the outside of the shell through the first part, and effective heat dissipation is achieved.

Description

An electrical connector assembly structure, distribution box and preparation method thereof

technical field

The invention relates to the technical field of power distribution, in particular to an assembly structure of an electrical connector, a power distribution box and a preparation method thereof.

Background technique

The power distribution box is a battery energy distribution unit and an important part of the high-voltage circuit of an electric vehicle. It is usually installed in the battery box and is directly connected to the power battery through a high-voltage plug-in. It is used to control the charging and discharging of the battery box. Its quality is good or bad , is very important to the safety of the whole vehicle; as an electrical component, its heat dissipation performance is good, which is directly related to the stability and service life of its own work.

The existing patent application with publication number CN113829882A discloses an electric vehicle with a high-voltage distribution box and a high-voltage distribution box. In this technical solution, a large number of copper bars are used to connect electrical components, The box is used as a power distribution unit. The copper bars and electrical components will generate heat during work. The copper bars and electrical components are placed in the box, which will cause the heat to be unable to dissipate. normal work;

The existing patent application with publication number CN115474416A discloses a BDU integrated cooling device and an electric vehicle, and relates to the field of battery technology. In this technical solution, the liquid-cooled plate substrate is fixedly installed on the surface of the BDU body assembly to dissipate heat from the BDU. In this heat dissipation method, the electrical components of the BDU need to transfer heat to the BDU body through the air first, and then transfer the heat to the BDU body. For the liquid cold plate, its heat dissipation efficiency is low;

The existing application publication number is CN116131047A patent application for invention, which proposes a kind of automobile BDU electrical connector, automobile BDU and BDU heat dissipation method, which is provided with a flow channel in the bus bar, and the bus bar is provided with a joint connected with the flow channel , to reduce the temperature of the BDU by sending refrigerant to the busbar. However, this heat dissipation method requires the layout of refrigerant delivery pipelines, which will affect the structural layout of the BDU distribution box, increase the difficulty of design, and increase the difficulty of assembly, and there is a risk of liquid leakage. Even if insulating refrigerant is used, When the liquid leaks, it is also easy to cause a conductive short circuit due to dissolved impurities, which is not conducive to subsequent maintenance work.

Contents of the invention

In view of this, the present invention proposes an assembly structure of electrical connectors, a power distribution box and a preparation method thereof, which improves the convenience of assembly and disassembly of components while ensuring good heat dissipation efficiency, so as to solve the problem of existing power distribution problems. The heat dissipation structure of the box has problems such as low heat dissipation efficiency and inconvenient disassembly and maintenance.

Technical scheme of the present invention is realized like this:

In one aspect, the present invention provides an assembly structure of an electrical connector, including an electrical connector and a housing, and the electrical connector and the housing are injection molded as an integral structure, wherein,

The electrical connector includes a first part and at least one second part, and the housing includes a shell body and a fixing part, wherein,

The first part is set to fit the outer wall of the shell body;

The second part is stamped and formed by the first part. The second part protrudes to the inside of the shell body to form a groove. The second part penetrates the shell body and has a notch on one side of the second part. The second part is used to connect the electrical element;

The shell body extends into the groove through the notch to form a fixing part.

On the basis of the above technical solution, preferably, the fixing part has a U-shaped plate structure, and the fixing part is attached to the second part and is perpendicular to the side wall of the shell body.

On the basis of the above technical solution, preferably, a first arc-shaped chamfer is provided at the junction of the second part and the first part, and the fixing part extends toward the first part and fits the first arc-shaped chamfer.

On the basis of the above technical solutions, preferably, the housing further includes an end plate, the end plate is arranged at the notch, and the end plate, the housing body and the fixing part are injection-molded as an integrated structure.

On the basis of the above technical solution, preferably, a second arc-shaped chamfer is provided on the edge of the side protruding from the second part to the inside of the housing body, and the housing also includes an insulating part, which is located on the outside of the groove and is in contact with the The shell is injection-molded into an integrated structure, and the insulating part is attached to the second arc-shaped chamfering part.

On the basis of the above technical solution, preferably, an insulating film and a heat conduction pad are also included, and an accommodating groove is opened on the outer wall of the shell body, wherein,

accommodating groove for accommodating the first part;

Insulating film, bonding the first part and the shell body;

The thermal pad is attached to the side of the insulating film away from the shell body.

On the basis of the above technical solution, preferably, it also includes a bolt, the bolt includes a head and a screw part, and the head and the screw part are of an integrated structure, wherein,

head, located in the groove;

The screw part passes through the shell body and the second part and extends into the shell, and is threadedly connected with the electrical component.

On the other hand, the present invention proposes a power distribution box, which includes the above-mentioned electrical connector assembly structure. , pre-charging relay, shunt and main negative relay to form positive circuit, pre-charging circuit and negative circuit, wherein,

The fuse, the main positive relay and the fast charging relay are electrically connected in series to form a positive circuit;

The pre-charging resistor is electrically connected in series with the pre-charging relay, and the pre-charging resistor and the pre-charging relay are electrically connected in parallel with the main positive relay to form a pre-charging circuit;

The shunt and the main negative relay are electrically connected in series to form a negative circuit.

On the basis of the above technical solutions, preferably, at least two electrical connectors are provided on the casing, at least two second parts are provided on the electrical connectors, and the main positive relay, the fast charging relay and the main negative relay are all A positioning plate is provided, and a positioning groove is provided between the slots of the two electrical connectors, wherein,

Two second parts, each for electrically connecting an electrical component, so as to realize the electrical connection between the two electrical components;

The positioning groove is provided on the shell body;

The positioning plate is plugged into the positioning groove for the installation and positioning of the electrical components.

In another aspect, the present invention proposes a method for preparing the above-mentioned power distribution box, comprising the following steps:

S1. First stamping a conductive material to form an electrical connector with a first part and a second part;

S2, placing the electrical connector into the cavity of the mold, the cavity of the mold corresponds to the shape of the housing;

S3. Inject thermoplastic or thermosetting material into the cavity of the mold. The thermoplastic or thermosetting material forms a shell with a shell body and a fixed part. After the shell is cooled and formed, the fixed part cooperates with the shell body to complete the fixing of the electrical connector. its removal from the mould;

S4. Put the electrical components into the casing and fix them, and then complete the electrical connection between the electrical components to form the positive circuit, the pre-charging circuit and the negative circuit. Among them, the main positive relay, the fast charging relay and the main Each of the negative relays is plugged and positioned through a positioning plate and a positioning slot.

Compared with the prior art, the electrical connector assembly structure, power distribution box and preparation method thereof of the present invention have the following beneficial effects:

(1) By injecting the electrical connector and the shell into an integrated structure, the second part of the electrical connector extends into the inside of the shell, while the first part is located outside the shell. When heat is generated due to the transmission current, the heat can be conducted to the first part through the second part of the electrical connector, so that the heat can be dissipated to the outside of the housing to achieve effective heat dissipation and avoid heat accumulation in the housing. The water-cooled plate is used to connect the first part of the electrical connector to further improve the heat dissipation efficiency, and even if the nozzle of the water-cooled plate leaks, it will not affect the electrical components. The setting of this structure has good safety in use; The structure setting does not need to add cooling components inside the shell, which reduces the difficulty of design and improves the convenience of disassembly and maintenance;

(2) The second part protrudes toward the inside of the housing, forming a groove. In this way, when the housing is injected, a fixing part can be formed in the groove, and the electrical connector is clamped by the housing body and the fixing part. Support, which further improves the stability of the installation of electrical connectors;

(3) The electrical components are installed with bolts. The head of the bolt is located in the groove formed by the second part, while the screw part penetrates the shell body and extends into the shell, and is threadedly connected with the electric components. The setting of this structure not only The electrical connection between the electrical connector and the electrical component is realized, and the electrical component is fixed on the housing at the same time, which reduces the number of fixed connectors used in the distribution box and improves the convenience of assembly between components. The head is located in the groove, so it will not affect the flatness of the outer wall of the shell, so as to facilitate the installation of heat dissipation structures such as water cooling components;

(4) By opening a positioning slot on the shell body and setting a positioning plate on the electrical component, when installing the electrical component, the electrical component can be positioned by inserting the positioning plate into the positioning slot first, which facilitates the positioning The fixing bolt hole or conductive bolt hole of the electrical component is aligned with the second part, which improves the convenience of connecting the bolt to the electrical component;

(5) The first part is bonded with an insulating film and a heat conduction pad, which facilitates heat conduction to the water-cooled components arranged outside the housing, and can also be used for insulation of electrical connectors.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the perspective view of distribution box of the present invention;

Fig. 2 is a top view of the distribution box of the present invention;

Fig. 3 is A-A direction section among Fig. 2 of the present invention;

Fig. 4 is an enlarged view of the structure of point A in Fig. 3 of the present invention;

Fig. 5 is a bottom structural diagram of the power distribution box of the present invention;

Fig. 6 is an enlarged view of the structure of point B in Fig. 5 of the present invention;

Fig. 7 is the front view of the distribution box of the present invention;

8 is a structural diagram of the bottom of the housing of the electrical connector assembly structure of the present invention;

Fig. 9 is a structural diagram in which the electrical components of the distribution box of the present invention are connected through electrical connectors;

Fig. 10 is a structural diagram of the electrical connector of the electrical connector assembly structure of the present invention;

Fig. 11 is a bottom surface structural view of the electrical connector assembly structure of the electrical connector of the present invention;

Fig. 12 is a structural diagram of the fast charging relay of the electrical connector assembly structure of the present invention;

Fig. 13 is the electrical schematic diagram of the distribution box of the present invention;

In the figure: 1, electrical connector; 111, first part; 112, second part; 113, third part; 101, groove; 102, notch; 103, side wall; 104, first arc chamfer 105, the second arc-shaped chamfering part; 2, the shell; 21, the shell body; 22, the fixed part; 23, the end plate; 24, the insulating part; 25, the positioning part; Positioning groove; 3. Insulating film; 4. Thermal pad; 5. Bolt; 51. Head; 52. Screw part; 6. Fuse; 7. Main positive relay; 8. Fast charging relay; 9. Pre-charging resistance; 10. Precharge relay; 11. Shunt; 12. Main negative relay; 13. Sampling connector; 14. Binding post; 00. Positioning board.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

As shown in Figures 1 to 13, the electrical connector assembly structure of the present invention includes an electrical connector 1, a housing 2, an insulating film 3, a thermal pad 4 and a bolt 5;

The assembly structure of the electrical connector can be applied to power distribution boxes such as BDU and PDU, and can also be applied to various boxes that need to install electrical components;

The power distribution box of the present invention includes the above-mentioned connector assembly structure, and also includes a fuse 6, a main positive relay 7, a fast charging relay 8, a pre-charging resistor 9, a pre-charging relay 10, a shunt 11, a main negative relay 12 and Positioning plate 00.

Wherein, as shown in FIGS. 3 to 5 , the electrical connector 1 and the housing 2 are injection molded into an integrated structure;

Specifically, as shown in FIG. 6, FIG. 10 and FIG. 11, the electrical connector 1 includes a first part 111 and at least one second part 112, and the housing 2 includes a housing body 21 and a fixing part 22;

As shown in FIGS. 4 to 6 , the first part 111 is arranged to fit the outer wall of the shell body 21 ; the second part 112 is stamped and formed by the first part 111 , and the second part 112 protrudes toward the inside of the shell body 21 to form a groove 101 , the second part 112 runs through the shell body 21, and a notch 102 is opened on one side of the second part 112, and the second part 112 is used to connect electrical components; the shell body 21 extends into the groove 101 through the notch 102 to form a fixed Part 22;

According to the above structure, when the electrical connector 1 is injection-molded with the housing 2, the material used for injection molding the housing 2 will form the housing body 21 to cover one side of the electrical connector 1, and the injection molding material will flow in through the notch 102 at the same time. In the groove 101, the fixed part 22 is formed. At this time, the fixed part 22 cooperates with the shell body 21 to clamp the protruding second part 112, so as to realize the injection molding connection between the electrical connector 1 and the shell 2; The overall structure is simple and has the advantages of convenient production;

Since the second part 112 protrudes into the housing 2, it is convenient to connect the electrical components in the housing 2 and carry out current transmission. When the electrical connector 1 and the electrical components work, the heat generated will be released by the second part 112. conduct to the first part 111, and dissipate heat through the first part 111 located outside the housing 2, which can avoid heat accumulation in the housing 2, so as to effectively improve the heat dissipation efficiency of the distribution box and avoid high temperature from affecting the distribution box. The working stability and service life of the power distribution box; at the same time, since there is no need to set heat dissipation measures such as heat dissipation pipelines in the power distribution box, this reduces the difficulty of design and assembly of the power distribution box.

As shown in Figures 3 to 6, the fixing part 22 has a U-shaped plate structure, and the fixing part 22 fits the second part perpendicular to the side wall 103 of the shell body 21;

According to the above structure, the fixing part 22 clamps the side wall 103 by cooperating with the housing body 21, so that the protruding surface of the second part 112 can be exposed, so that the housing 2 can fix the electrical connector 1 while the electrical components can be connected with The protruding surface of the second portion 112 is electrically connected to avoid the problem of connection interference.

Further, as shown in FIG. 4 , a first arc-shaped chamfer 104 is provided at the junction of the second portion 112 and the first portion 111 , and the fixing portion 22 extends toward the first portion 111 and fits the first arc-shaped chamfer. Section 104;

According to the above structure, when the fixed part 22 extends and fits the first arc-shaped chamfered part 104, the fixed part 22 has a flanging part, that is, the part that fits the first arc-shaped chamfered part 104, which can further improve The stability of the injection molding of the electrical connector 1 and the housing 2 can prevent the separation of the injection molding interface of the electrical connector 1 and the housing 2. Even if the injection molding interface is separated, the electrical connector 1 is not easy to shake greatly, which improves the integrity of the injection molding structure. The stability, as well as the working stability of the application of the structure, make the electrical connection assembly structure more suitable for the vibration environment.

Further, as shown in FIG. 4 , a second arc-shaped chamfer 105 is provided on the edge of the side of the second part 112 that protrudes toward the inside of the housing body 21 , and the housing 2 also includes an insulating part 24 , which is located at the edge of the groove 101 The outer side is injection-molded with the shell body 21 as an integrated structure, and the insulating part 24 is attached to the second arc-shaped chamfering part 105;

With the above-mentioned structure, after the insulating part 24 is provided to fit the second arc-shaped chamfered part 105, the stability of the injection molding connection between the electrical connector 1 and the housing 2 can be further improved. The insulating part 24 and the fixing part 22 are clamped from both sides. Holding the second part 112 can further improve the integrity of the injection molding structure. Even when the housing 2 is heated, vibrated, or subjected to shear force, the electrical connector 1 and the housing 2 are not easy to separate; the insulating part 24 and the fixing part 22 The structure of the electrical connector 1 that is relatively arranged and attached to it not only ensures the stability of the installation structure of the electrical connector 1, but also does not take up too much space and can ensure portability. It is of great significance to affect the energy density of energy storage components.

Further, the housing 2 also includes an end plate 23, which is arranged at the notch 102, and the end plate 23 is injection-molded with the housing body 21 and the fixing part 22 as an integral structure;

With the above structure, after the end plate 23 is provided, the end plate 23 and the fixing portion 22 form a ring structure, which can further improve the stability of the fixing portion 22 .

Further, as shown in FIG. 3 , FIG. 4 and FIG. 8 , an accommodating groove 201 is provided on the outer wall of the shell body 21, and the accommodating groove 201 is used to accommodate the first part 111; the insulating film 3 is attached to the first part 111 and the shell body 21; the thermal pad 4 is attached to the side of the insulating film 3 away from the shell body 21;

According to the above structure, since the first part 111 is located on the outer wall of the housing body 21, the accommodating groove 201 is provided so that the first part 111 is flush with the outer wall of the housing body 21, which is convenient for attaching the insulating film 3 to the housing body 21 to cover the first part 111 to achieve insulation protection for the first part 111; after that, the thermal pad 4 is attached to the insulating film 3, and then heat dissipation components such as water cooling plates are installed to connect the thermal pad 4 , active heat dissipation can be carried out, and the heat dissipation efficiency of the electrical components and the electrical connector 1 in the distribution box can be effectively improved.

Further, as shown in FIG. 6 , FIG. 8 and FIG. 9 , the housing 2 is provided with a positioning portion 25, and the electrical connector 1 further includes a third portion 113, and each of the positioning portion 25 and the third portion 113 is provided with at least One, wherein the third part 113, like the second part 112, also protrudes into the housing 2, and the third part 113 and the second part 112 are oppositely arranged at the edge of the first part 111; the positioning part 25 and the housing 2 Injection-molded integral structure, and the positioning part 25 is held against the third part 113, which can prevent the electrical connector 1 from warping;

The formation of the above-mentioned notch 102 is formed because the second part 112 is arranged at the edge of the first part 111. The notch 102 facilitates the injection molding material to enter to form the fixing part 22, and at the same time reduces the contact between the injection molding material and the electrical connector 1. On the contact surface, if the second part 112 is set in the middle of the first part 111, the injection molding material needs to cross a part of the first part 111 in order to form the fixed part 22, but this kind of structure is not convenient for injection molding and uses a lot of materials. Second, it will reduce the exposed area of the first part 111, which will affect the heat dissipation and interfere with the setting of the insulating film 3 and the heat conduction pad 4. However, if the structure described in this technical solution is injected from the notch 102 on one side, the first The other side of the part 111 is prone to warping, but after the positioning part 25 and the third part 113 are provided, this problem can be solved, so as to fully ensure the installation stability of the electrical connector 1 .

As shown in Fig. 3 and Fig. 4, the bolt 5 includes a head 51 and a screw part 52, the head 51 and the screw part 52 are integrally structured, wherein the head 51 is located in the groove 101; the screw part 52 penetrates the shell The body 21 and the second part 112 extend into the housing 2 and are screwed to the electrical components;

As in the above structure, in order to facilitate the connection of the electrical components and the electrical connector 1, a bolt 5 is provided. After the electrical connector 1 and the housing 2 are injection-molded into an integral structure, the bolt 5 is installed from the outside of the housing 2, and the bolt 5 The screw part 52 passes through the shell body 21 of the housing 2 and the second part 112 of the electrical connector 1, the head 51 will be located in the groove 101, and then the screw part 52 can be connected to the electrical component, which realizes the connection between the electrical component and the electrical component. While the housing 2 is being fixed, the electrical connection between the electrical components and the electrical connector 1 is also realized, and no additional fixing parts are required for the installation and fixing of the electrical components and the housing 2, which reduces the number of connectors and simplifies the Installation process; at the same time, the head 51 of the bolt 5 is located in the groove 101, which will not affect the flatness of the outer surface of the housing 2, and facilitates the installation of heat dissipation components such as the insulating film 3, the heat conduction pad 4 and the water cooling plate for insulation and cooling. Work, when the installation bolt 5 is connected to the electrical components, use a hexagon socket wrench to install it.

In the power distribution box of the present invention, the housing 2 is the housing of the power distribution box, and the electrical components include a fuse 6, a main positive relay 7, a fast charging relay 8, a pre-charging resistor 9, a pre-charging relay 10, and a shunt 11 and the main negative relay 12 to form a positive circuit, a pre-charging circuit and a negative circuit, wherein the fuse 6, the main positive relay 7 and the fast-charging relay 8 are electrically connected in series in turn to form a positive circuit; the pre-charging resistor 9 and The pre-charging relay 10 is electrically connected in series, and the pre-charging resistor 9 and the pre-charging relay 10 are electrically connected in parallel with the main positive relay 7 to form a pre-charging circuit; the shunt 11 and the main negative relay 12 are electrically connected in series to form a negative circuit;

For the above structure, please refer to Figure 13 for details. The application scenario of the power distribution box of the present invention includes a battery pack. The design of the above circuit is suitable for the charge and discharge control of the battery module in the battery pack. The battery module is connected in series to the main positive relay 7 between the main negative relay 12;

Referring to FIG. 2, the setting of the shunt 11 is used to set the sampling connector 13, and the sampling connector 13 is used to connect the detection circuit to detect the current of the circuit of the power distribution box;

As shown in Figure 1, Figure 2 and Figure 9, there is also a terminal 14, one end of the terminal 14 is connected to the electrical connector 1, and the other end is used to connect the battery module, so as to realize the charging of the battery module. Discharge work.

As shown in Figure 2, Figure 6 and Figure 8, at least two electrical connectors 1 are provided on the housing 2, and at least two second parts 112 are arranged on the electrical connector 1, the main positive relay 7, the fast charging relay 8 and the main negative relay 12 are provided with a positioning plate 00, and a positioning slot 202 is provided between the notches 102 of the two electrical connectors 1, wherein the two second parts 112 are each used to electrically connect an electrical component , to realize the electrical connection between the two electrical components; the positioning groove 202 is set on the shell body 21; the positioning plate 00 is inserted into the positioning groove 202 for the installation and positioning of the electrical components;

According to the above structure, when installing the main positive relay 7, the fast charging relay 8 and the main negative relay 12, they are first plugged into the positioning groove 202 on the housing 2 through the positioning plate 00, so that the installation of the above electrical components can be realized Positioning is convenient to align the bolt holes for fixing or conducting electric components with the second part 112 of the electrical connector 1, so that when the bolt 5 is installed, the screw part 52 of the bolt 5 is conveniently aligned with the bolt hole of the electric component to realize The connection between the electrical components and the housing 2 is fixed, which improves the convenience of installing the electrical components;

In fact, the positioning groove 202 is located between the two end plates 23. The arrangement of the end plates 23 can increase the contact area between the housing 2 and the positioning plate 00, which can further increase the insertion stability of the positioning plate 00. In order to realize the fixing of electrical components, at the same time, the end plate 23 is formed by the cavity of the injection mold, and the position of the end plate 23 can be conveniently matched with the notch 102 for injection plastic flow, so as to form the fixing part 22 in the groove 101.

Specifically, when the electrical connector 1 is used, the fuse 6 and the main positive relay 7 are electrically connected through an electrical connector 1, and the fuse 6 and the main positive relay 7 are each electrically connected to a second part 112; the main positive relay 7 is electrically connected to the fast charging relay 8 through an electrical connector 1, and the main positive relay 7 and the fast charging relay 8 are each electrically connected to a second part 112; the shunt 11 and the main negative relay 12 are electrically connected through an electrical connector 1 The shunt 11 and the main negative relay 12 are each electrically connected to a second part 112 .

The preparation method of the distribution box of the present invention comprises the following steps:

S1. First, punch a conductive material to form an electrical connector 1 with a first part 111 and a second part 112;

S2, placing the electrical connector 1 into the cavity of the mold, the cavity of the mold corresponds to the shape of the housing 2;

S3. Inject thermoplastic or thermosetting material into the cavity of the mold. The thermoplastic or thermosetting material forms the housing 2 with the housing body 21 and the fixing part 22. After the housing 2 is cooled and formed, the fixing part 22 cooperates with the housing body 21 to complete the electrical connection Fixing of part 1, after which it is removed from the mould;

S4. Put the electrical components into the casing 2 and fix them, and then complete the electrical connection between the electrical components to form the positive circuit, the pre-charging circuit and the negative circuit. Among them, the main positive relay 7, fast charging The relay 8 and the main and negative relays 12 are plugged and positioned through a positioning plate 00 and a positioning groove 202 respectively.

As in the above steps, the conductive material can be copper bars and other metals. After the electrical connector 1 and the housing 2 are connected and fixed by injection molding, the positioning groove 202 is formed at the same time, so that the main positive relay 7, the fast charging relay 8 and the main negative The relay 12 can be positioned first, and then connected to the electrical connector 1, which improves the convenience of assembly.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. An assembly structure of an electrical connector, characterized in that it includes an electrical connector (1) and a housing (2), the electrical connector (1) and the housing (2) are injection molded as an integral structure, in, The electrical connector (1) includes a first part (111) and at least one second part (112), and the housing (2) includes a housing body (21) and a fixing part (22), wherein, The first part (111) is arranged close to the outer wall of the shell body (21); The second part (112) is stamped and formed by the first part (111), the second part (112) protrudes to the inside of the shell body (21) to form a groove (101), the first part The second part (112) runs through the housing body (21), and a notch (102) is opened on one side of the second part (112), and the second part (112) is used for connecting electrical components; The shell body (21) extends into the groove (101) through the notch (102) to form the fixing part (22). 2. The assembly structure of electrical connectors according to claim 1, characterized in that: the fixing part (22) is a U-shaped plate structure, and the fixing part (22) is attached to the second part (112) ) perpendicular to the side wall (103) of the shell body (21). 3. The electrical connector assembly structure according to claim 2, characterized in that: a first arc-shaped chamfer (104) is provided at the junction of the second part (112) and the first part (111) ), the fixing part (22) extends toward the first part (111) and fits the first arc-shaped chamfered part (104). 4. The electrical connector assembly structure according to claim 1, characterized in that: the housing (2) further comprises an end plate (23), and the end plate (23) is arranged in the notch (102) , and the end plate (23), the shell body (21) and the fixing part (22) are injection-molded as an integrated structure. 5. The assembly structure of electrical connectors according to claim 1, characterized in that: a second arc-shaped chamfer is provided on the edge of the side of the second part (112) protruding toward the inside of the shell body (21) (105), the housing (2) further includes an insulating part (24), the insulating part (24) is located outside the groove (101), and is integrally molded with the housing body (21) structure, and the insulating part (24) is attached to the second arc-shaped chamfered part (105). 6. The electrical connector assembly structure according to any one of claims 1 to 5, characterized in that: it also includes an insulating film (3) and a heat conduction pad (4), and the outer wall of the shell body (21) is provided with accommodating tank (201), wherein, The accommodating groove (201) is used for accommodating the first part (111); The insulating film (3) is attached to the first part (111) and the shell body (21); The heat conduction pad (4) is attached to the side of the insulating film (3) away from the shell body (21). 7. The electrical connector assembly structure according to any one of claims 1 to 5, characterized in that it also includes a bolt (5), and the bolt (5) includes a head (51) and a screw part (52), The head (51) and the screw part (52) are integrally structured, wherein, The head (51) is located in the groove (101); The screw part (52) passes through the housing body (21) and the second part (112) and extends into the housing (2), and is threadedly connected with the electrical component. 8. A power distribution box, characterized in that it includes the electrical connector assembly structure according to any one of claims 1 to 7, the housing (2) is the housing of the power distribution box, and the Electrical components include fuse (6), main positive relay (7), fast charging relay (8), pre-charging resistor (9), pre-charging relay (10), shunt (11) and main negative relay (12), To be used to form the positive circuit, the pre-charge circuit and the negative circuit, wherein, The fuse (6), the main positive relay (7) and the fast charging relay (8) are electrically connected in series in order to form the positive circuit; The pre-charging resistor (9) is electrically connected in series with the pre-charging relay (10), and the pre-charging resistor (9) and the pre-charging relay (10) are electrically connected to the main positive relay (7) Connect in parallel to form a pre-charging circuit; The shunt (11) is electrically connected in series with the main negative relay (12) to form a negative circuit. 9. The power distribution box according to claim 8, characterized in that: there are at least two electrical connectors (1) on the housing (2), each of the electrical connectors (1) There are at least two second parts (112), the main positive relay (7), the fast charge relay (8) and the main negative relay (12) are all provided with a positioning plate (00), two Positioning grooves (202) are provided between the notches (102) of the electrical connectors (1), wherein, The two second parts (112) are each used to electrically connect one of the electrical components, so as to realize the electrical connection between the two electrical components; The positioning groove (202) is set on the shell body (21); The positioning plate (00) is plugged into the positioning groove (202) for installation and positioning of the electrical components. 10. A method for preparing a power distribution box as claimed in claim 9, comprising the following steps: S1. First stamping a conductive material to form the electrical connector (1) having the first part (111) and the second part (112); S2. Put the electrical connector (1) into the cavity of the mold, the cavity of the mold corresponds to the shape of the housing (2); S3. Injecting thermoplastic or thermosetting material into the mold cavity, the thermoplastic or thermosetting material forms the shell (2) having the shell body (21) and the fixing part (22), and the shell After the body (2) is cooled and formed, the fixing part (22) cooperates with the shell body (21) to complete the fixing of the electrical connector (1), and then take it out of the mold; S4. Put the electrical components into the casing (2) and fix them, and then complete the electrical connection between the electrical components to form the positive circuit, the pre-charging circuit and the Negative circuit, wherein, the main positive relay (7), the fast charge relay (8) and the main negative relay (12) are respectively connected to the positioning slot (202) through a positioning plate (00) Plug positioning.