Vehicle-mounted booster and vehicle-mounted charging system

Abstract

The utility model discloses a vehicle-mounted voltage booster and a vehicle-mounted charging system, and relates to the technical field of automobile charging, the vehicle-mounted voltage booster comprises a conductive shell, a plurality of partition plates are arranged in the conductive shell, the plurality of partition plates separate the conductive shell from a first accommodating cavity, a second accommodating cavity and a third accommodating cavity, and the first accommodating cavity, the second accommodating cavity and the third accommodating cavity are communicated with each other. A control circuit board is installed in the first containing cavity, a relay set is installed in the second containing cavity, and a boost inductor is installed in the third containing cavity. According to the vehicle-mounted booster, the first accommodating cavity, the second accommodating cavity and the third accommodating cavity in the conductive shell are separated from one another and are independent from one another, so that the electromagnetic interference among the control circuit board, the relay group and the boosting inductor can be reduced, and the normal work of the vehicle-mounted booster can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile charging, in particular to a vehicle-mounted booster and a vehicle-mounted charging system. Background Art

[0002] At present, with the development of electric vehicles, electric vehicles are gradually adopting the 800VDC platform, and there is still a certain proportion of 500VDC charging piles on the market. When an electric vehicle encounters an emergency and needs to be charged but there is only a 500VDC (or other low-voltage battery pack voltage) charging pile, in order for the electric vehicle to be charged with a 500VDC charging pile, it is necessary to use an on-board booster to boost the voltage to 800VDC to charge the electric vehicle.

[0003] A vehicle-mounted booster generally includes a control circuit board, a relay and a boost inductor. Since the relay and the boost inductor generate electromagnetic waves when working, the electromagnetic waves will interfere with the circuit of the control circuit board and affect the normal use of the control circuit board. Utility Model Content

[0004] The embodiment of the utility model provides a vehicle-mounted booster and a vehicle-mounted charging system to solve the technical problem in the related art that the control circuit board of the existing vehicle-mounted booster is susceptible to electromagnetic interference from relays and boost inductors.

[0005] In a first aspect, a vehicle-mounted booster is provided, comprising:

[0006] A conductive shell, wherein a plurality of partitions are arranged in the conductive shell, and the plurality of partitions divide the conductive shell into a first receiving chamber, a second receiving chamber and a third receiving chamber which are isolated from each other. The first receiving chamber is provided with a control circuit board, the second receiving chamber is provided with a relay group, and the third receiving chamber is provided with a boost inductor.

[0007] In some embodiments, a metal cover is provided above the control circuit board.

[0008] In some embodiments, the vehicle-mounted booster further comprises:

[0009] A filter module is installed in the second receiving cavity and is electrically connected to the relay group. The filter module includes a differential and common mode integrated magnetic ring, an X capacitor and a Y capacitor.

[0010] In some embodiments, a thermal pad is provided between the bottom of the boost inductor and the conductive housing.

[0011] In some embodiments, a cooling water channel is provided on a side of the conductive shell facing away from the conductive shell, a water channel cover plate connected to the conductive shell is provided on the cooling water channel, and a water inlet joint and a water outlet joint are provided on the water channel cover plate.

[0012] In some embodiments, an upper cover plate is provided above the conductive shell, and a sealant is provided between the upper cover plate and the conductive shell.

[0013] In some embodiments, a waterproof breathable valve is provided on the side of the conductive shell.

[0014] In some embodiments, the boost inductor is equipped with a temperature sensor, and the temperature sensor is electrically connected to the control circuit board.

[0015] In some embodiments, the side of the conductive shell is further provided with an input high voltage connector, an output high voltage connector and a low voltage communication connector.

[0016] In a second aspect, a vehicle-mounted charging system is provided, comprising the aforementioned vehicle-mounted booster, and further comprising:

[0017] A junction box, the junction box being electrically connected to the vehicle-mounted booster and the battery pack;

[0018] An electric drive device is electrically connected to the vehicle-mounted booster and the battery pack.

[0019] The beneficial effects brought by the technical solution provided by the utility model include:

[0020] An embodiment of the utility model provides a vehicle-mounted booster and a vehicle-mounted charging system, wherein the vehicle-mounted booster is provided with a conductive shell, wherein a plurality of partitions are provided in the conductive shell, wherein the plurality of partitions divide the conductive shell into a first receiving chamber, a second receiving chamber and a third receiving chamber which are isolated from each other, wherein a control circuit board is installed in the first receiving chamber, a relay group is installed in the second receiving chamber, and a boost inductor is installed in the third receiving chamber. Since the first receiving chamber, the second receiving chamber and the third receiving chamber are separated and independent from each other, electromagnetic interference between the control circuit board, the relay group and the boost inductor can be reduced, thereby ensuring the normal operation of the vehicle-mounted booster. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.

[0022] Figure 1 A first schematic diagram of a vehicle-mounted booster provided by an embodiment of the utility model;

[0023] Figure 2 An electrical schematic diagram of a vehicle-mounted booster provided in an embodiment of the utility model;

[0024] Figure 3 A second schematic diagram of a vehicle-mounted booster provided by an embodiment of the utility model;

[0025] Figure 4 A third schematic diagram of a vehicle-mounted booster provided by an embodiment of the utility model;

[0026] Figure 5 A fourth schematic diagram of a vehicle-mounted booster provided in an embodiment of the utility model;

[0027] Figure 6 An electrical schematic diagram of a vehicle charging system provided by an embodiment of the utility model;

[0028] In the figure:

[0029] 1. Conductive housing; 11. First receiving chamber; 12. Second receiving chamber; 13. Third receiving chamber; 14. Waterproof breathable valve; 15. Input high voltage connector; 16. Output high voltage connector; 17. Low voltage communication connector;

[0030] 2. Control circuit board; 21. Metal cover;

[0031] 3. Relay group;

[0032] 4. Filter module;

[0033] 5. Boost inductor; 51. Temperature sensor;

[0034] 6. Thermal pad;

[0035] 7. Water channel cover plate; 71. Water inlet joint; 72. Water outlet joint;

[0036] 8. Upper cover plate; 81. Sealant. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] The embodiment of the utility model provides a vehicle-mounted booster, which can solve the technical problem that the control circuit board of the existing vehicle-mounted booster is susceptible to electromagnetic interference from relays and boost inductors.

[0039] See also Figure 1As shown, an embodiment of the utility model provides a vehicle-mounted booster, comprising: a conductive shell 1, a plurality of partitions are arranged in the conductive shell 1, and the plurality of partitions separate the conductive shell 1 into a first receiving chamber 11, a second receiving chamber 12 and a third receiving chamber 13, wherein the first receiving chamber 11 is installed with a control circuit board 2, the second receiving chamber 12 is installed with a relay group 3, and the third receiving chamber 13 is installed with a boost inductor 5.

[0040] Specifically, see Figure 1 As shown, the conductive housing 1 can be made of conductive metal, such as a cast aluminum housing. A first receiving chamber 11, a second receiving chamber 12 and a third receiving chamber 13 are arranged in the conductive housing 1. The control circuit board 2, the relay group 3 and the boost inductor 5 are installed in the first receiving chamber 11, the second receiving chamber 12 and the third receiving chamber 13 respectively. The first receiving chamber 11, the second receiving chamber 12 and the third receiving chamber 13 are separated and independent from each other, which can reduce the mutual electromagnetic interference between the control circuit board 2, the relay group 3 and the boost inductor 5, and ensure the normal operation of the booster.

[0041] As an optional implementation, in a utility model embodiment, see Figure 1 As shown, a metal cover 21 is provided above the control circuit board 2 , and the metal cover 21 can independently perform electromagnetic shielding protection on the control circuit board 2 again, thereby preventing electromagnetic interference of external electronic components on the control circuit board 2 as much as possible.

[0042] As an optional implementation, in a utility model embodiment, see Figure 1 As shown, the vehicle-mounted booster also includes: a filter module 4, the filter module 4 is installed in the second receiving cavity 12 and is electrically connected to the relay group 3, and the filter module 4 includes a differential common mode integrated magnetic ring, an X capacitor and a Y capacitor. Specifically, see Figure 2 As shown, the relay group 3 includes relay S1, relay S2 and relay S3, relay S1 and relay S2 are high-voltage positive relays, relay S3 is a high-voltage negative relay, and the filter module 4 is arranged between relay S1 and relay S2 to eliminate differential mode interference and common mode interference to ensure stable charging.

[0043] As an optional implementation, in a utility model embodiment, see Figure 3 As shown, a thermal pad 6 is provided between the bottom of the boost inductor 5 and the conductive housing 1. The thermal pad 6 can transfer the heat generated by the boost inductor 5 to the conductive housing 1 as much as possible, which is convenient for the boost inductor 5 to dissipate heat and ensure the safe use of the boost inductor 5.

[0044] As an optional implementation, in a utility model embodiment, see Figure 4As shown, the conductive housing 1 is provided with a cooling water channel on the side away from the conductive housing 1, and the cooling water channel is provided with a water channel cover plate 7 connected to the conductive housing 1, and the water channel cover plate 7 is provided with a water inlet joint 71 and a water outlet joint 72. Specifically, the conductive housing 1 can adopt a stir friction welding process to form the built-in cooling water channel, which can be used to water-cool the boost inductor 5 to ensure the safe use of the boost inductor 5. Further, the water inlet joint 71 and the water outlet joint 72 on the water channel cover plate 7 can be detachable, and can be adapted to quick-connect joints of different calibers (such as VDA NW14, VDA NW16, VDANW18, etc.) according to customer needs. In addition, the water inlet joint 71 and the water outlet joint 72 can be changed from a traditional round shape to a hexagonal shape, and the outer diameter is increased with threads, and the water inlet joint 71 and the water outlet joint 72 can be directly installed with a hexagonal socket, which is convenient for installation and has a small size.

[0045] As an optional implementation, in a utility model embodiment, see Figure 1 and Figure 5 As shown, the upper cover plate 8 is disposed above the conductive housing 1, and a sealant 81 is disposed between the upper cover plate 8 and the conductive housing 1. The sealant 81 can make the overall performance of the booster reach IP69 waterproof grade.

[0046] As an optional implementation, in a utility model embodiment, see Figure 4 As shown, a waterproof breathable valve 14 is provided on the side of the conductive housing 1. The waterproof breathable valve 14 can ensure that the pressure inside the conductive housing 1 is balanced with the pressure outside when the booster changes suddenly in extreme temperature, and ensure that the booster is more secure and reliable in waterproof sealing in extreme environments.

[0047] As an optional implementation, in a utility model embodiment, see Figure 1 As shown, the boost inductor 5 is equipped with a temperature sensor 51, and the temperature sensor 51 is electrically connected to the control circuit board 2. During the boost charging process, the boost inductor 5 is the electrical component that generates the most heat. Figure 2 The NTC in the boost inductor 5 can monitor the internal temperature of the boost inductor 5 in real time, and can adjust the boost charging power in real time according to the monitored temperature to ensure that the boost inductor 5 is within the safe operating temperature range during the boost process, thereby ensuring the safety of boost charging.

[0048] As an optional implementation, in a utility model embodiment, see Figure 1As shown, the side of the conductive housing 1 is also provided with an input high-voltage connector 15, an output high-voltage connector 16 and a low-voltage communication connector 17. The input high-voltage connector 15 is used to physically connect to the charging pile. When boosting is required, the booster is connected to the electric drive device of the electric vehicle through the output high-voltage connector 16 and the low-voltage communication connector 17, and finally the output high-voltage connector of the electric drive device is connected to the battery pack of the electric vehicle to charge the battery pack. Among them, the low-voltage communication connector 17 is a CAN bus connector, and the booster uses CAN signal communication to complete data transmission, which can reduce the wiring harness (CANH, CANL, power supply, a total of 4 wires) and simplify the structural design. The traditional solution generally includes 3 relay controls (6 wires), 1 current sensor (2 wires), 1 high-voltage interlock (2 wires), 3 high-voltage sampling (6 wires), and 1 power supply (2 wires), a total of 18 wires. In addition, the control circuit board 2 of the booster can integrate MCU-related circuits, and the software supports UDS diagnosis, CAN wake-up, OTA upgrade, relay status diagnosis, and boost inductor temperature monitoring functions, making charging more secure.

[0049] See also Figure 6 As shown, an embodiment of the utility model further provides a vehicle-mounted charging system, including the aforementioned vehicle-mounted booster, and also including: a junction box and an electric drive device.

[0050] The junction box is electrically connected to the vehicle-mounted booster and the battery pack, and the electric drive device is electrically connected to the vehicle-mounted booster and the battery pack. When boosting is required, the vehicle-mounted booster is connected to the DC charging pile through the junction box, and is connected to the battery pack through the electric drive device, and finally charges the battery pack.

[0051] The on-board charging system in the embodiment of the utility model has an on-board booster provided with a conductive shell 1, in which a first receiving chamber 11, a second receiving chamber 12 and a third receiving chamber 13 are provided, wherein the first receiving chamber 11, the second receiving chamber 12 and the third receiving chamber 13 are respectively provided with a control circuit board 2, a relay group 3 and a boost inductor 5, and the first receiving chamber 11, the second receiving chamber 12 and the third receiving chamber 13 are separated and independent from each other, so that electromagnetic interference between the control circuit board 2, the relay group 3 and the boost inductor 5 can be reduced, thereby ensuring the normal operation of the booster.

[0052] As an optional implementation, in a utility model embodiment, see Figure 1 As shown, a metal cover 21 is provided above the control circuit board 2 , and the metal cover 21 can independently perform electromagnetic shielding protection on the control circuit board 2 again, thereby preventing electromagnetic interference of external electronic components on the control circuit board 2 as much as possible.

[0053] As an optional implementation, in a utility model embodiment, see Figure 1 As shown, the vehicle-mounted booster also includes: a filter module 4, the filter module 4 is installed in the second receiving cavity 12 and is electrically connected to the relay group 3, and the filter module 4 includes a differential common mode integrated magnetic ring, an X capacitor and a Y capacitor. Specifically, see Figure 2 As shown, the relay group 3 includes relay S1, relay S2 and relay S3, relay S1 and relay S2 are high-voltage positive relays, relay S3 is a high-voltage negative relay, and the filter module 4 is arranged between relay S1 and relay S2 to eliminate differential mode interference and common mode interference to ensure stable charging.

[0054] As an optional implementation, in a utility model embodiment, see Figure 3 As shown, a thermal pad 6 is provided between the bottom of the boost inductor 5 and the conductive housing 1. The thermal pad 6 can transfer the heat generated by the boost inductor 5 to the conductive housing 1 as much as possible, which is convenient for the boost inductor 5 to dissipate heat and ensure the safe use of the boost inductor 5.

[0055] As an optional implementation, in a utility model embodiment, see Figure 4 As shown, the conductive housing 1 is provided with a cooling water channel on the side away from the conductive housing 1, and the cooling water channel is provided with a water channel cover plate 7 connected to the conductive housing 1, and the water channel cover plate 7 is provided with a water inlet joint 71 and a water outlet joint 72. Specifically, the conductive housing 1 can adopt a stir friction welding process to form the built-in cooling water channel, which can be used to water-cool the boost inductor 5 to ensure the safe use of the boost inductor 5. Further, the water inlet joint 71 and the water outlet joint 72 on the water channel cover plate 7 can be detachable, and can be adapted to quick-connect joints of different calibers (such as VDA NW14, VDA NW16, VDANW18, etc.) according to customer needs. In addition, the water inlet joint 71 and the water outlet joint 72 can be changed from a traditional round shape to a hexagonal shape, and the outer diameter is increased with threads, and the water inlet joint 71 and the water outlet joint 72 can be directly installed with a hexagonal socket, which is convenient for installation and has a small size.

[0056] As an optional implementation, in a utility model embodiment, see Figure 1 and Figure 5 As shown, the upper cover plate 8 is disposed above the conductive housing 1, and a sealant 81 is disposed between the upper cover plate 8 and the conductive housing 1. The sealant 81 can make the overall performance of the booster reach IP69 waterproof grade.

[0057] As an optional implementation, in a utility model embodiment, see Figure 4As shown, a waterproof breathable valve 14 is provided on the side of the conductive housing 1. The waterproof breathable valve 14 can ensure that the pressure inside the conductive housing 1 is balanced with the pressure outside when the booster changes suddenly in extreme temperature, and ensure that the booster is more secure and reliable in waterproof sealing in extreme environments.

[0058] As an optional implementation, in a utility model embodiment, see Figure 1 As shown, the boost inductor 5 is equipped with a temperature sensor 51, and the temperature sensor 51 is electrically connected to the control circuit board 2. During the boost charging process, the boost inductor 5 is the electrical component that generates the most heat. Figure 2 The NTC in the boost inductor 5 can monitor the internal temperature of the boost inductor 5 in real time, and can adjust the boost charging power in real time according to the monitored temperature to ensure that the boost inductor 5 is within the safe operating temperature range during the boost process, thereby ensuring the safety of boost charging.

[0059] As an optional implementation, in a utility model embodiment, see Figure 1 As shown, the side of the conductive housing 1 is also provided with an input high-voltage connector 15, an output high-voltage connector 16 and a low-voltage communication connector 17. The input high-voltage connector 15 is used to physically connect to the charging pile. When boosting is required, the booster is connected to the electric drive device of the electric vehicle through the output high-voltage connector 16 and the low-voltage communication connector 17, and finally the output high-voltage connector of the electric drive device is connected to the battery pack of the electric vehicle to charge the battery pack. Among them, the low-voltage communication connector 17 is a CAN bus connector, and the booster uses CAN signal communication to complete data transmission, which can reduce the wiring harness (CANH, CANL, power supply, a total of 4 wires) and simplify the structural design. The traditional solution generally includes 3 relay controls (6 wires), 1 current sensor (2 wires), 1 high-voltage interlock (2 wires), 3 high-voltage sampling (6 wires), and 1 power supply (2 wires), a total of 18 wires. In addition, the control circuit board 2 of the booster can integrate MCU-related circuits, and the software supports UDS diagnosis, CAN wake-up, OTA upgrade, relay status diagnosis, and boost inductor temperature monitoring functions, making charging more secure.

[0060] In the description of the present utility model, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0061] It should be noted that, in the present utility model, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0062] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A vehicle-mounted booster, characterized in that: include: A conductive shell (1), wherein a plurality of partitions are arranged in the conductive shell (1), and the plurality of partitions divide the conductive shell (1) into a first receiving chamber (11), a second receiving chamber (12), and a third receiving chamber (13) which are isolated from each other; the first receiving chamber (11) is equipped with a control circuit board (2), the second receiving chamber (12) is equipped with a relay group (3), and the third receiving chamber (13) is equipped with a boost inductor (5).

2. The vehicle-mounted booster according to claim 1, characterized in that: A metal cover (21) is provided above the control circuit board (2).

3. The vehicle-mounted booster according to claim 1, characterized in that: Also includes: A filter module (4), the filter module (4) is installed in the second receiving cavity (12) and is electrically connected to the relay group (3), the filter module (4) comprises a differential common mode integrated magnetic ring, an X capacitor and a Y capacitor.

4. The vehicle-mounted booster according to claim 1, characterized in that: A thermal pad (6) is provided between the bottom of the boost inductor (5) and the conductive housing (1).

5. The vehicle-mounted booster according to claim 1, characterized in that: A cooling water channel is provided on a side of the conductive shell (1) facing away from the conductive shell (1), the cooling water channel is provided with a water channel cover plate (7) connected to the conductive shell (1), and the water channel cover plate (7) is provided with a water inlet joint (71) and a water outlet joint (72).

6. The vehicle-mounted booster according to claim 1, characterized in that: An upper cover plate (8) is provided above the conductive shell (1), and a sealant (81) is provided between the upper cover plate (8) and the conductive shell (1).

7. The vehicle-mounted booster according to claim 1, characterized in that: A waterproof breathable valve (14) is provided on the side of the conductive housing (1).

8. The vehicle-mounted booster according to claim 1, characterized in that: The boost inductor (5) is provided with a temperature sensor (51), and the temperature sensor (51) is electrically connected to the control circuit board (2).

9. The vehicle-mounted booster according to claim 1, characterized in that: An input high-voltage connector (15), an output high-voltage connector (16) and a low-voltage communication connector (17) are also provided on the side of the conductive housing (1).

10. A vehicle charging system, characterized in that: The vehicle-mounted booster according to any one of claims 1 to 9 further comprises: A junction box, the junction box being electrically connected to the vehicle-mounted booster and the battery pack; An electric drive device is electrically connected to the vehicle-mounted booster and the battery pack.

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