An integrated pre-charge circuit electrical device

Abstract

The utility model provides a kind of integrated pre-charging circuit electrical device, it is related to battery pack technical field, including circuit board, the top of circuit board is equipped with welding relay, the side of welding relay is equipped with relay control interface, the side of welding relay away from relay control interface is equipped with input electrical interface, the side of input electrical interface is equipped with high voltage patch resistor, the side of high voltage patch resistor is equipped with output electrical interface, using pre-charging resistance uses smaller high voltage patch resistor, simultaneously, relay uses welding relay, and welding relay, high voltage patch resistor is integrated in circuit board, no longer uses external cross connection wire;Integrated output electrical interface, input electrical interface and relay control interface are connected to outside, reduce electrical device to occupy battery pack inner space, reduce total weight, integrated design, improve design quality, reduce cross connection wire harness interference rub and so on Problem risk, solve the physical integration degree low, the shortcoming of large space occupation.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to an integrated pre-charge circuit electrical device. Background Technology

[0002] According to Chinese Publication No. CN108964166B, a pre-charge module with a main positive relay includes a carrier, a main positive relay, a pre-charge relay, and a pre-charge resistor mounted on the carrier, forming an integral component. The main positive relay, pre-charge relay, and pre-charge resistor are distributed in a preset manner within the carrier. The integral component has a high-voltage interface and a low-voltage interface. The coil leads of the main positive relay and the pre-charge relay are respectively connected to the low-voltage interface. One of the two load leads of the pre-charge relay is directly connected to the high-voltage interface, and the other of the two load leads of the pre-charge relay is connected in series with the pre-charge resistor and then connected to the high-voltage interface. The two load leads of the main positive relay are respectively connected to the high-voltage interface. This invention, by assembling the main positive relay, pre-charge relay, and pre-charge resistor into a pre-charge module, allows this module to be integrated into any high-voltage box requiring pre-charge design, forming a standardized design, reducing production costs, and facilitating the maintenance of the high-voltage box.

[0003] The pre-charge circuit of the above-mentioned and existing technologies mainly consists of a pre-charge relay, a pre-charge resistor and a connecting harness. It has low physical integration and occupies a large space. However, the space inside the battery pack is relatively small. When the space occupied is large, it will further reduce the internal space of the battery pack.

[0004] The mounting hole positions of the precharge circuit components in the above-mentioned and existing technologies are fixed. However, the mounting position requirements of the precharge circuit components in battery packs from different manufacturers are different, and the fixed mounting holes cannot be adapted. As a result, the position of the fixed mounting holes of the precharge circuit components needs to be adjusted according to different design requirements, thereby increasing costs. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as low physical integration, large space occupation, and the inability of the mounting holes for the fixed positions of pre-charge circuit components to accommodate the mounting holes of the main body manufacturer. Therefore, this invention proposes an integrated pre-charge circuit component.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an integrated pre-charge circuit electrical device, comprising a circuit board, a welding relay on the top of the circuit board, a relay control interface on one side of the welding relay, an input electrical interface on the side of the welding relay away from the relay control interface, a high-voltage surface mount resistor on one side of the input electrical interface, an output electrical interface on one side of the high-voltage surface mount resistor, mounting holes at each corner of the circuit board, mounting posts on the top of each of the four mounting holes, four insertion holes on the top surface of each of the four mounting posts, a through hole in the middle of each of the four insertion holes, a gasket at the bottom of each of the four mounting posts, a fixing bracket at the bottom of each of the four gaskets, and an elongated hole on the surface of each of the four fixing brackets.

[0007] Preferably, the welding relay, high-voltage chip resistor, input electrical interface, output electrical interface and relay control interface are all mounted on the top surface of the circuit board, and the welding relay, high-voltage chip resistor, input electrical interface, output electrical interface and relay control interface are all welded to the circuit board.

[0008] Preferably, all four mounting posts are installed in the mounting holes of the circuit board, and the bottom surface of the mounting posts is threaded.

[0009] Preferably, the four insertion holes on the top surface of the four mounting posts are arranged in a circumferential array.

[0010] Preferably, all four gaskets are located at the bottom of the circuit board, and each gasket is sleeved with a mounting post.

[0011] Preferably, all four fixing brackets are installed at the bottom end of the mounting column, and all fixing brackets are threadedly connected to the mounting column.

[0012] Preferably, the four through holes on the top surface of the mounting column are located in the middle of the top surface of the mounting column, and the through holes penetrate the entire mounting column.

[0013] Beneficial effects

[0014] In this invention, a smaller high-voltage chip resistor is used for the pre-charge resistor, and a soldered relay is used for the relay. The soldered relay and the high-voltage chip resistor are integrated into the circuit board, eliminating the need for external jumper wires. External connections include integrated output electrical interfaces, input electrical interfaces, and relay control interfaces, reducing the space occupied by electrical components within the battery pack and reducing the overall weight. At the same time, the integrated design improves design quality and reduces the risk of interference and friction problems in cross-connection harnesses, solving the shortcomings of low physical integration and large space occupation.

[0015] In this invention, when using mounting holes at different positions, a locking block that can be inserted into the mounting post's insertion hole is used. The locking block is a hard object that can be inserted into the insertion hole, causing the mounting post to be locked. After being locked, the mounting post 7 is rotated by the locking block, causing the fixing bracket to move downwards and no longer tightly pressing the circuit board, thus allowing the mounting post to rotate. After the mounting post rotates, since one end of the fixing bracket is installed at the bottom of the mounting post 7, the fixing bracket can rotate 360 ​​degrees around the mounting post, allowing the fixing bracket to be rotated out from the bottom of the circuit board. After being rotated out, the elongated hole of the fixing bracket is aligned with the mounting holes at different positions and fixed with screws. After the fixing bracket is fixed, the locking block is used again to lock the insertion hole of the mounting post 7 and rotate it in the opposite direction to the previous rotation, causing the fixing bracket to move upwards through the threads and thus be tightly fixed to the bottom of the circuit board, preventing the fixing bracket from rotating. By extending and rotating the fixing bracket, it can adapt to different installation positions of different battery packs, solving the problem that the mounting holes of the pre-charge circuit electrical components cannot adapt to the mounting holes of the main body manufacturer. Attached Figure Description

[0016] Figure 1 This is an isometric drawing of the present invention;

[0017] Figure 2 This is a top view of the present invention;

[0018] Figure 3 For the present utility model Figure 2 Sectional view at point AA;

[0019] Figure 4 This is a bottom view of the present invention.

[0020] Legend:

[0021] 1. Circuit board; 2. Soldered relay; 3. Relay control interface; 4. Input electrical interface; 5. Output electrical interface; 6. High voltage chip resistor; 7. Mounting post; 8. Through hole; 9. Socket; 10. Mounting hole; 11. Gasket; 12. Mounting bracket; 13. Oblong hole. Detailed Implementation

[0022] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0023] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1:

[0025] Reference Figure 1-4 An integrated precharge circuit electrical device includes a circuit board 1. A soldered relay 2 is located on the top of the circuit board 1. A relay control interface 3 is located on one side of the soldered relay 2. An input electrical interface 4 is located on the side of the soldered relay 2 away from the relay control interface 3. A high-voltage surface mount resistor 6 is located on one side of the input electrical interface 4. An output electrical interface 5 is located on one side of the high-voltage surface mount resistor 6. Mounting holes 10 are located at each corner of the circuit board 1. Mounting posts 7 are located at the top of each of the four mounting holes 10. Four insertion holes 9 are located on the top surface of each of the four mounting posts 7. A through hole 8 is located in the middle of each of the four insertion holes 9. A gasket 11 is located at the bottom of each of the four mounting posts 7. A mounting bracket 12 is located at the bottom of each of the four gaskets 11. An elongated hole 13 is located on the surface of each of the four mounting brackets 12. The soldered relay 2, high-voltage surface mount resistor 6, and high-voltage surface mount resistor 6 are located on the side of the high-voltage surface mount resistor 6. The circuit board 1 has mounting holes 2 at each corner. A soldered relay 2, high-voltage surface mount resistor 6, and high-voltage surface mount resistor 6 are located on the top surface of the high-voltage surface mount resistor 6. An output electrical interface 5 is located on one side of the high-voltage surface mount resistor 6. Mounting holes 10 are located at each corner of the circuit board 1. A mounting post 7 is located at the top of each of the four mounting holes 10. A mounting bracket 12 is located at the bottom of each of the four mounting posts 7. An elongated hole 13 is located on the surface of each of the four mounting brackets 12. The circuit board 1 includes an integrated precharge circuit electrical device. A soldered relay 2, high-voltage surface mount resistor 6, and high- The chip resistor 6, input electrical interface 4, output electrical interface 5, and relay control interface 3 are all mounted on the top surface of the circuit board 1, and the relay 2, high voltage chip resistor 6, input electrical interface 4, output electrical interface 5, and relay control interface 3 are all soldered to the circuit board 1. The four mounting posts 7 are all installed in the mounting holes 10 of the circuit board 1, and the bottom surface of the mounting posts 7 is threaded. The four insertion holes 9 on the top surface of the four mounting posts 7 are arranged in a circumferential array. The four gaskets 11 are all set at the bottom of the circuit board 1, and the gaskets 11 are all sleeved with the mounting posts 7. The four fixing brackets 12 are all installed at the bottom of the mounting posts 7, and the fixing brackets 12 are all threadedly connected to the mounting posts 7. The through holes 8 on the top surface of the four mounting posts 7 are set at the middle position of the top surface of the mounting posts 7, and the through holes 8 penetrate the entire mounting posts 7.

[0026] Circuit board 1 forms electrical connection paths through etched circuits, carrying and connecting other electronic components to realize power transmission and signal interaction. The welding relay 2 operates based on electromagnetic principles. When control current is input to the relay control interface 3, a magnetic field is generated through the internal electromagnetic mechanism, attracting the armature to actuate, causing normally open or normally closed contacts to close or open, thereby controlling the on / off state of the main circuit and realizing circuit conduction and disconnection control. The working principle of the welding relay 2 is a publicly available technology in mature existing fields. The relay control interface 3 receives electrical signals from the external control circuit and transmits them to the welding relay 2 through the lines on circuit board 1 to control the working state of the welding relay 2. The input electrical interface 4 serves as a power input port, connecting to an external power supply to introduce power from the external power supply into the internal circuit of the integrated pre-charge circuit device. The output electrical interface 5 serves as a power output port, transmitting the pre-charged power to the external load to provide the power required for the load's operation. The high-voltage chip resistor 6 operates according to Ohm's law. During pre-charging, the current is limited by its own resistance to prevent instantaneous high current from impacting and damaging other components in the circuit, thus protecting the circuit. The high-voltage chip resistor 6 is a publicly available technology in mature fields. The mounting post 7 is mainly used for mounting and positioning. The mounting holes 10 on the mounting post circuit board 1 provide a mounting location for the entire mounting bracket 12. Its bottom end has threads for threaded connection with the mounting bracket 12. The through hole 8 can be used to insert screws, allowing screws to be directly inserted into the through hole 8 and installed in the threaded hole of the battery pack when no expansion of the mounting position is needed, thereby fixing the circuit board 1 in place. The socket 9 is used in conjunction with a specific locking block or with a hard object that can be inserted into the socket 9. When the locking block is inserted into the socket 9, the mounting post 7 can be locked or unlocked, allowing the position of the mounting bracket 12 to be adjusted by rotating the mounting post 7. The mounting hole 10 provides the mounting position for the mounting post 7 and also serves for positioning and mounting the circuit board 1 to external structures. The gasket 11 serves to insulate, buffer, and distribute pressure evenly. To prevent electrical short circuits between the mounting bracket 12 and the bottom surface of the circuit board 1, and to avoid damage to the surface of the circuit board 1 when the mounting bracket 12 rotates, the mounting bracket 12 is threaded to the mounting post 7 and can rotate around the mounting post 7. The elongated hole 13 on its surface is used to connect with the mounting holes 10 on the external mounting structure via screws, enabling the entire electrical component to be fixedly installed on the external device. Its position can be adjusted to adapt to different installation layouts. The elongated hole 13 provides a certain amount of adjustment space for the screws, allowing the mounting bracket 12 to be finely adjusted within a certain range during installation to ensure precise alignment with the mounting holes 10 at different external locations. Specific Implementation Example 2:

[0028] Reference Figure 1-4An integrated pre-charge circuit device, further based on the basic structure in Specific Embodiment 1, allows for pre-charging of the circuit during initial startup after an external power supply is connected to the input electrical interface 4. This pre-charges the circuit by passing through the high-voltage surface-mount resistor 6, limiting the initial current and protecting other components. After pre-charging, a control signal is input to the welding relay 2 via the relay control interface 3, causing the contacts of the welding relay 2 to close, thus completing the circuit. Electrical energy is then transferred from the input electrical interface 4 through the welding relay 2 to the output electrical interface 5, supplying power to the external load.

[0029] When mounting is required in different positions of the mounting holes 10, a locking block is used to insert into the socket 9 of the mounting post 7. The locking block is a hard object that can be inserted into the socket 9, which locks the mounting post 7 in place. After locking, the mounting post 7 is rotated by the locking block, causing the fixing bracket 12 to move downward and no longer tightly pressing the circuit board 1, thus allowing the mounting post 7 to rotate. After the mounting post 7 rotates, since one end of the fixing bracket 12 is installed at the bottom of the mounting post 7, the fixing bracket 12 can rotate 360 ​​degrees around the mounting post 7, allowing the fixing bracket 12 to rotate out from the bottom of the circuit board 1. After rotating out, the elongated hole 13 of the fixing bracket 12 is aligned with the mounting holes 10 in different positions and fixed with screws. After the fixing bracket 12 is fixed, the locking block is used again to lock the mounting post 7 into the socket 9 and rotate it in the opposite direction to the previous rotation, causing the fixing bracket 12 to move upward through the threads and thus be tightly fixed to the bottom of the circuit board 1, preventing the fixing bracket 12 from rotating. The extension and rotation of the fixing bracket 12 can adapt to different installation positions of different battery packs.

[0030] In summary:

[0031] 1. A smaller high-voltage chip resistor 6 is used for pre-charging resistors. At the same time, a soldered relay 2 is used for relays. The soldered relay 2 and the high-voltage chip resistor 6 are integrated into the circuit board 1, eliminating the need for external jumper wires. External connections are integrated with output electrical interface 5, input electrical interface 4 and relay control interface 3, reducing the space occupied by electrical components in the battery pack and reducing the overall weight. At the same time, the integrated design improves the design quality, reduces the risk of interference and friction problems in cross-connection harnesses, and solves the disadvantages of low physical integration and large space occupation.

[0032] 2. When using mounting holes 10 installed in different positions, a locking block that can be inserted into the socket 9 of the mounting post 7 is used. The locking block is a hard object that can be inserted into the socket 9, which locks the mounting post 7. After locking, the mounting post 7 is rotated by the locking block, causing the fixing bracket 12 to move downward and no longer tightly pressing the circuit board 1, thus allowing the mounting post 7 to rotate. After the mounting post 7 rotates, since one end of the fixing bracket 12 is installed at the bottom of the mounting post 7, the fixing bracket 12 can rotate 360 ​​degrees around the mounting post 7, thus allowing the fixing bracket 12 to rotate out from the bottom of the circuit board 1. After rotating out, Align the elongated hole 13 of the mounting bracket 12 with the mounting holes 10 at different positions and fix it with screws. After the mounting bracket 12 is fixed, use the clip to lock it into the insertion hole 9 of the mounting post 7 and rotate it in the opposite direction to the previous rotation. This causes the mounting bracket 12 to move upward through the thread and thus be firmly fixed to the bottom of the circuit board 1, preventing the mounting bracket 12 from rotating. The extension and rotation of the mounting bracket 12 can adapt to different installation positions of different battery packs, solving the problem that the mounting holes 10 of the precharge circuit electrical components cannot adapt to the mounting holes 10 of the main body manufacturer.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An integrated pre-charge circuit electrical device, comprising a circuit board (1), characterized in that: The circuit board (1) has a welding relay (2) on its top. The welding relay (2) has a relay control interface (3) on one side. The welding relay (2) has an input electrical interface (4) on the side away from the relay control interface (3). The input electrical interface (4) has a high-voltage chip resistor (6) on one side. The high-voltage chip resistor (6) has an output electrical interface (5) on one side. Each corner of the circuit board (1) has a mounting hole (10). The top of each of the four mounting holes (10) has a mounting post (7). The top surface of each of the four mounting posts (7) has four insertion holes (9). The middle of each of the four insertion holes (9) has a through hole (8). The bottom of each of the four mounting posts (7) has a gasket (11). The bottom of each of the four gaskets (11) has a fixing bracket (12). The surface of each of the four fixing brackets (12) has an elongated hole (13).

2. The integrated pre-charge circuit electrical device according to claim 1, characterized in that: The welding relay (2), high voltage chip resistor (6), input electrical interface (4), output electrical interface (5) and relay control interface (3) are all mounted on the top surface of the circuit board (1), and the welding relay (2), high voltage chip resistor (6), input electrical interface (4), output electrical interface (5) and relay control interface (3) are all welded to the circuit board (1).

3. The integrated pre-charge circuit electrical device according to claim 1, characterized in that: All four mounting posts (7) are installed in the mounting holes (10) of the circuit board (1), and the bottom surface of the mounting posts (7) is threaded.

4. The integrated pre-charge circuit electrical device according to claim 1, characterized in that: The four insertion holes (9) on the top surface of the four mounting posts (7) are arranged in a circumferential array.

5. An integrated pre-charge circuit electrical device according to claim 1, characterized in that: All four gaskets (11) are located at the bottom of the circuit board (1), and all gaskets (11) are fitted with mounting posts (7).

6. An integrated pre-charge circuit electrical device according to claim 1, characterized in that: All four fixing brackets (12) are installed at the bottom of the mounting column (7), and all fixing brackets (12) are threadedly connected to the mounting column (7).

7. An integrated pre-charge circuit electrical device according to claim 1, characterized in that: The four through holes (8) on the top surface of the mounting post (7) are located in the middle of the top surface of the mounting post (7), and the through holes (8) penetrate the entire mounting post (7).

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