Power domain controller and vehicle

Abstract

The invention provides a power domain controller and a vehicle, and relates to the technical field of vehicles. The power domain controller is arranged close to the quick charging socket, the power domain controller is integrated with a BMS (battery management system) and a quick charging relay, the BMS is connected with an electromagnetic coil in the quick charging relay, a driving circuit in the BMS is used for driving the quick charging relay, and the quick charging relay is connected with the quick charging socket. According to the power domain controller, the fast charging relay is integrated in the power domain controller which is integrated with the BMS and is arranged close to the fast charging socket, so that the length of the high-voltage wiring harness used for connecting the fast charging relay and the fast charging socket is reduced, the occupied space of the high-voltage wiring harness is reduced, the space utilization rate of the whole vehicle is improved, and meanwhile, the cost of the whole vehicle is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a power domain controller and a vehicle. Background Art

[0002] A fast charging relay is a relay specially used in a fast charging system. It is mainly used to control the on and off of the current to achieve fast charging of the battery. With the rapid development of new energy vehicles, fast charging technology has become increasingly important. Fast charging relays play a vital role in the charging process of new energy vehicles. Its main functions include controlling the on and off of the charging current, protecting circuit safety, achieving fast charging, and ensuring the reliability and stability of the system.

[0003] In the related technology, the fast charging relay is installed in the battery pack (Battery Disconnect Unit, referred to as BDU), and the fast charging relay and the fast charging socket are connected through a high-voltage wire harness to transmit the high voltage and high current during the charging process through the high-voltage wire harness to ensure the efficiency and safety of the charging process. In some scenarios, the high-voltage wire harness used to connect the fast charging relay and the fast charging socket is long and occupies a large space. Summary of the invention

[0004] The present application provides a power domain controller and a vehicle to solve the problem that in some scenarios, the high-voltage wiring harness used to connect the fast-charging relay and the fast-charging socket is long and occupies a large space.

[0005] In a first aspect, the present application provides a power domain controller, including: the power domain controller and the fast charging socket are arranged adjacent to each other, the power domain controller integrates a battery management system (Battery Management System, referred to as BMS) and a fast charging relay, the electromagnetic coil in the BMS and the fast charging relay is connected, and the driving circuit in the BMS is used to drive the fast charging relay; the fast charging relay is connected to the fast charging socket.

[0006] In one possible implementation, the fast charging relay includes a first relay and a second relay, the first contact end of the first relay is connected to the positive terminal of the fast charging socket, and the second contact end of the first relay is connected to the positive terminal of the power battery; the first contact end of the second relay is connected to the negative terminal of the fast charging socket, and the second contact end of the second relay is connected to the negative terminal of the power battery.

[0007] In a possible implementation, the drive circuit includes: a first relay drive circuit and a second relay drive circuit; the first relay drive circuit is arranged in parallel with the coil in the first relay; the second relay drive circuit is arranged in parallel with the coil in the second relay.

[0008] In a possible implementation, the power domain controller also integrates a first contact adhesion detection circuit and a second contact adhesion detection circuit; the input end of the first contact adhesion detection circuit is connected to the positive terminal of the power battery, the output end of the first contact adhesion detection circuit is connected to the first contact end of the second relay, and the first contact adhesion detection circuit is used to detect whether the second relay is stuck; the input end of the second contact adhesion detection circuit is connected to the first contact end of the first relay, the output end of the second contact adhesion detection circuit is connected to the first contact end of the second relay, and the second contact adhesion detection circuit is used to detect whether the first relay is stuck.

[0009] In one possible implementation, the first contact adhesion detection circuit includes: a first resistor, a first isolated power supply, a second resistor, a third resistor and a first isolated operational amplifier; one end of the first resistor serves as an input end of the first contact adhesion detection circuit, the other end of the first resistor is connected to the input end of the first isolated power supply, the first output end of the first isolated power supply is connected to the first input end of the first isolated operational amplifier via the second resistor, the second output end of the first isolated power supply is connected to the second input end of the first isolated operational amplifier via the third resistor, and the output end of the first isolated operational amplifier serves as the output end of the first contact adhesion detection circuit.

[0010] In one possible implementation, the second contact adhesion detection circuit includes: a fourth resistor, a second isolated power supply, a fifth resistor, a sixth resistor and a second isolated operational amplifier; one end of the fourth resistor serves as an input end of the second contact adhesion detection circuit, the other end of the fourth resistor is connected to the input end of the second isolated power supply, the first output end of the second isolated power supply is connected to the first input end of the second isolated operational amplifier via the fifth resistor, the second output end of the second isolated power supply is connected to the second input end of the second isolated operational amplifier via the sixth resistor, and the output end of the second isolated operational amplifier serves as the output end of the second contact adhesion detection circuit.

[0011] In one possible implementation, the BMS and the electromagnetic coil in the fast-charging relay are connected through a first wiring harness, and the fast-charging relay and the fast-charging socket are connected through a second wiring harness.

[0012] In a possible implementation manner, a harness voltage of the second harness is greater than a harness voltage of the first harness.

[0013] In a second aspect, the present application provides a vehicle, comprising a vehicle body and a power battery and a fast charging socket arranged in the vehicle body, and a power domain controller as provided in the first aspect, wherein the power domain controller and the fast charging socket are arranged adjacent to each other.

[0014] In one possible implementation, the power domain controller and the fast charging socket are arranged adjacent to each other in the front compartment of the vehicle body.

[0015] The power domain controller and vehicle provided by the present application are arranged adjacent to the fast-charging socket, the power domain controller is integrated with the BMS and the fast-charging relay, the electromagnetic coil in the BMS and the fast-charging relay is connected, the driving circuit in the BMS is used to drive the fast-charging relay, and the fast-charging relay is connected to the fast-charging socket. The present application reduces the length of the high-voltage wiring harness used to connect the fast-charging relay and the fast-charging socket, reduces the space occupied by the high-voltage wiring harness, improves the space utilization of the whole vehicle, and reduces the cost of the whole vehicle by integrating the fast-charging relay into the power domain controller which is integrated with the BMS and arranged adjacent to the fast-charging socket. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0017] Figure 1 A schematic diagram of the structure of a power domain controller provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the connection relationship between the fast charging relay, the power battery and the fast charging socket provided in the embodiment of the present application;

[0019] Figure 3 A schematic diagram of the connection relationship between the drive circuit and the fast charging relay provided in the embodiment of the present application;

[0020] Figure 4 A schematic diagram of the structure of a fast charging relay contact adhesion detection circuit provided in an embodiment of the present application;

[0021] Figure 5 A schematic diagram of the principle of a first contact adhesion detection circuit provided in an embodiment of the present application;

[0022] Figure 6 A schematic diagram of the structure of a first contact adhesion detection circuit provided in an embodiment of the present application;

[0023] Figure 7 A schematic diagram of the principle of a second contact adhesion detection circuit provided in an embodiment of the present application;

[0024] Figure 8 A schematic diagram of the structure of a second contact adhesion detection circuit provided in an embodiment of the present application.

[0025] Description of reference numerals:

[0026] 21: First relay;

[0027] 22: Second relay;

[0028] 23: Power battery;

[0029] 24: Fast charging socket;

[0030] 25: first relay driving circuit;

[0031] 26: second relay driving circuit;

[0032] 210: electromagnetic coil of the first relay;

[0033] 220: electromagnetic coil of the second relay;

[0034] 27: Voltage detection circuit;

[0035] 28: first contact adhesion detection circuit;

[0036] 29: Second contact adhesion detection circuit;

[0037] 281: first resistor;

[0038] 282: first isolated power supply;

[0039] 283: second resistor;

[0040] 284: the third resistor;

[0041] 285: first isolation amplifier;

[0042] 291: fourth resistor;

[0043] 292: second isolated power supply;

[0044] 293: fifth resistor;

[0045] 294: sixth resistor;

[0046] 295: Second isolation op amp.

[0047] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0048] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0049] In the related art, in some scenarios, the fast charging socket is set in the front cabin of the vehicle, and the battery pack is set in the rear cabin of the vehicle, which makes the high-voltage wire harness used to connect the fast charging socket and the fast charging relay arranged longer. At the same time, the longer high-voltage wire harness occupies a larger space.

[0050] Based on the problems existing in the related technology, the embodiment of the present application integrates the fast charging relay in a power domain controller that is integrated with a BMS and is arranged adjacent to the fast charging socket, thereby reducing the length of the high-voltage wiring harness used to connect the fast charging relay and the fast charging socket, reducing the space occupied by the high-voltage wiring harness, improving the space utilization of the entire vehicle, and at the same time, reducing the cost of the entire vehicle.

[0051] The following describes the application scenarios to which the embodiments of the present application are applicable.

[0052] The power domain controller provided in the embodiment of the present application is suitable for vehicles in which the power domain controller and the fast charging socket are arranged adjacent to each other. For example, the power domain controller and the fast charging socket are both arranged in the front cabin of the vehicle.

[0053] The power domain controller provided in the embodiment of the present application is described in detail below in conjunction with specific embodiments.

[0054] Figure 1 This is a schematic diagram of the structure of the power domain controller provided in the embodiment of the present application. Figure 1 As shown, the power domain controller and the fast charging socket are arranged adjacent to each other, and the power domain controller integrates the BMS and the fast charging relay. The electromagnetic coil in the BMS and the fast charging relay is connected, and the driving circuit in the BMS is used to drive the fast charging relay; the fast charging relay is connected to the fast charging socket.

[0055] Exemplarily, the power domain controller and the fast charging socket can both be arranged in the front cabin of the vehicle.

[0056] Exemplarily, the electromagnetic coil in the BMS and the fast-charging relay can be connected through a low-voltage wiring harness, and the fast-charging relay and the fast-charging socket can be connected through a high-voltage wiring harness.

[0057] In one possible implementation, after the fast-charging relay is integrated into the power domain controller, a low level or a high level is provided to the coil in the fast-charging relay through the driving circuit in the BMS to achieve the closing and disconnection of the contacts of the fast-charging relay. It can be understood that by using the driving circuit in the BMS to drive the fast-charging relay, the power battery can be connected or disconnected to protect the safety of the power battery.

[0058] In the embodiment of the present application, the power domain controller and the fast charging socket are arranged adjacent to each other, the power domain controller is integrated with the BMS and the fast charging relay, the BMS is connected to the electromagnetic coil in the fast charging relay, the driving circuit in the BMS is used to drive the fast charging relay, and the fast charging relay is connected to the fast charging socket. In the embodiment of the present application, by integrating the fast charging relay into the power domain controller which is integrated with the BMS and arranged adjacent to the fast charging socket, the length of the high-voltage wire harness used to connect the fast charging relay and the fast charging socket is reduced, the space occupied by the high-voltage wire harness is reduced, the space utilization rate of the whole vehicle is improved, and at the same time, the cost of the whole vehicle is reduced.

[0059] It is understandable that, compared with the related art of installing the fast charging relay in the battery pack, the fast charging relay will occupy the volume of the battery pack. In the embodiment of the present application, by integrating the fast charging relay in the power domain controller, the volume of the battery pack can be reduced. Under the same envelope, by adding batteries to the battery pack, the battery power of the battery pack can be increased, thereby increasing the power of the vehicle.

[0060] Optionally, the fast charging relay includes a first relay and a second relay, the first contact end of the first relay is connected to the positive terminal of the fast charging socket, and the second contact end of the first relay is connected to the positive terminal of the power battery; the first contact end of the second relay is connected to the negative terminal of the fast charging socket, and the second contact end of the second relay is connected to the negative terminal of the power battery.

[0061] Exemplarily, the first relay may be a fast-charging positive relay, and the second relay may be a fast-charging negative relay.

[0062] Figure 2 A schematic diagram of the connection relationship between the fast charging relay, the power battery and the fast charging socket provided in the embodiment of the present application. Figure 2 As shown, contact a of the first relay 21 represents the first contact end of the first relay 21, contact b of the first relay 21 represents the second contact end of the first relay 21, contact c of the second relay 22 represents the first contact end of the second relay 22, contact d of the second relay 22 represents the second contact end of the second relay 22, endpoint e of the fast charging socket 24 represents the positive terminal of the fast charging socket 24, and endpoint f of the fast charging socket 24 represents the negative terminal of the fast charging socket 24.

[0063] like Figure 2 As shown in the figure, contact a of the first relay 21 is connected to the positive terminal of the fast charging socket 24, and contact b of the first relay 21 is connected to the positive terminal of the power battery 23; contact c of the second relay 22 is connected to the negative terminal of the fast charging socket 24, and contact d of the second relay 22 is connected to the negative terminal of the power battery 23.

[0064] like Figure 2As shown in the figure, after the fast charging socket 24 is connected to the external charging pile, the power of the external charging pile is received, and the power battery 23 can be charged by closing the contacts of the first relay 21 and the second relay 22.

[0065] In some embodiments, the connection relationship between the fast charging relay, the power battery and the fast charging socket can also be that the first contact end of the fast charging relay is connected to the positive end of the fast charging socket, the second contact end of the fast charging relay is connected to the positive end of the power battery, and the negative end of the power battery is connected to the negative end of the fast charging socket.

[0066] It should be noted that the power domain controller provided in the embodiment of the present application does not limit the number of fast charging relays integrated in the power domain controller, which can be determined based on actual application requirements.

[0067] Optionally, the drive circuit includes: a first relay drive circuit and a second relay drive circuit, the first relay drive circuit is arranged in parallel with the electromagnetic coil in the first relay; the second relay drive circuit is arranged in parallel with the electromagnetic coil in the second relay.

[0068] Exemplarily, the first relay driving circuit realizes opening or closing of the contacts of the first relay by providing a high level or a low level to the first relay.

[0069] Exemplarily, the second relay driving circuit realizes opening or closing of the contacts of the second relay by providing a high level or a low level to the second relay.

[0070] Optionally, two ends of the first relay drive circuit are respectively connected to two ends of the electromagnetic coil in the first relay, and two ends of the second relay drive circuit are respectively connected to two ends of the electromagnetic coil in the second relay.

[0071] Figure 3 Schematic diagram of the connection relationship between the drive circuit and the fast charging relay provided in the embodiment of the present application. Figure 3 As shown, the two ends of the electromagnetic coil 210 of the first relay 21 are respectively connected to the two ends of the first relay drive circuit 25, that is, the first relay drive circuit 25 is arranged in parallel with the electromagnetic coil in the first relay 21; the two ends of the electromagnetic coil 220 of the second relay 22 are respectively connected to the two ends of the second relay drive circuit 26, that is, the second relay drive circuit 26 is arranged in parallel with the electromagnetic coil in the second relay 22.

[0072] It is understandable that in a circuit provided with a relay, contact adhesion detection of the relay is crucial. When a contact adhesion failure occurs in the relay, it will cause circuit failure and even cause safety hazards. The adhesion detection circuit of the fast charging relay is described in detail below.

[0073] Optionally, the power domain controller provided in the embodiment of the present application also integrates a first contact adhesion detection circuit and a second contact adhesion detection circuit; the input end of the first contact adhesion detection circuit is connected to the positive terminal of the power battery, and the output end of the first contact adhesion detection circuit is connected to the first contact end of the second relay, and the first contact adhesion detection circuit is used to detect whether the second relay is stuck; the input end of the second contact adhesion detection circuit is connected to the first contact end of the first relay, and the output end of the second contact adhesion detection circuit is connected to the first contact end of the second relay, and the second contact adhesion detection circuit is used to detect whether the first relay is stuck.

[0074] Figure 4 This is a schematic diagram of the structure of the fast charging relay contact adhesion detection circuit provided in the embodiment of the present application. Figure 4 As shown, endpoint n of the first contact adhesion detection circuit 28 represents the input end of the first contact adhesion detection circuit 28, endpoint m of the first contact adhesion detection circuit 28 represents the output end of the first contact adhesion detection circuit 28, endpoint h of the second contact adhesion detection circuit 29 represents the input end of the second contact adhesion detection circuit 29, endpoint g of the second contact adhesion detection circuit 29 represents the output end of the second contact adhesion detection circuit 29, contact a of the first relay 21 represents the first contact end of the first relay 21, contact b of the first relay 21 represents the second contact end of the first relay 21, contact c of the second relay 22 represents the first contact end of the second relay 22, contact d of the second relay 22 represents the second contact end of the second relay 22, and the voltage detection circuit 27 is connected in parallel with the power battery 23, and is used to detect the voltage between the positive terminal and the negative terminal of the power battery 23.

[0075] As can be seen from the figure, when the contacts c and d of the second relay are in the energized state and the contacts a and b of the first relay are in the disconnected state, the voltage V2 detected at both ends of the first contact adhesion detection circuit is the same as the voltage V1 detected at both ends of the voltage detection loop, and both are the voltages at both ends of the power battery; when the contacts c and d of the second relay are in the energized state and the contacts a and b of the first relay are also in the energized state, the voltage V2 detected at both ends of the first contact adhesion detection circuit and the voltage V3 detected at both ends of the second contact adhesion detection circuit are the same as the voltage V1 detected at both ends of the voltage detection loop, and both are the voltages at both ends of the power battery; when the contacts c and d of the first relay are in the disconnected state, the voltage V2 detected at both ends of the first contact adhesion detection circuit and the voltage V3 detected at both ends of the second contact adhesion detection circuit are the same, and can be the voltage corresponding to the floating pressure at both ends of the first contact adhesion detection circuit and the second contact adhesion detection circuit.

[0076] Exemplarily, the voltage value corresponding to the floating voltage may be a voltage less than 5V.

[0077] It should be noted that when the second relay is in the disconnected state, the fact that no voltage can be detected at both ends of the first contact adhesion detection circuit and the first contact adhesion detection circuit does not mean that there is no voltage at all. There is a certain floating pressure at both ends of the first contact adhesion detection circuit and the first contact adhesion detection circuit.

[0078] Combine the following Figure 5 The first contact adhesion detection circuit provided in the embodiment of the present application is described in detail.

[0079] Figure 5 This is a schematic diagram of the principle of the first contact adhesion detection circuit provided in the embodiment of the present application. Figure 5 As shown, the first contact adhesion detection circuit includes a first resistor 281, a first isolated power supply 282, a second resistor 283, a third resistor 284 and a first isolated operational amplifier 285;

[0080] Among them, one end of the first resistor serves as the input end of the first contact adhesion detection circuit, the other end of the first resistor is connected to the input end of the first isolation power supply, the first output end of the first isolation power supply is connected to the first input end of the first isolation operational amplifier via the second resistor, the second output end of the first isolation power supply is connected to the second input end of the first isolation operational amplifier via the third resistor, and the output end of the first isolation operational amplifier serves as the output end of the first contact adhesion detection circuit.

[0081] For example, the first resistor may include multiple resistors with the same or different resistance values. The first resistor is used to divide the voltage output by the positive electrode of the power battery. In the embodiment of the present application, the number of resistors in the first resistor and the resistance values ​​of different resistors are not limited, and can be determined according to actual application requirements.

[0082] Exemplarily, the first isolated power supply is used to convert the voltage signal passing through the first resistor into a differential signal, that is, the voltage signal passing through the first resistor is converted into a first differential signal and a second differential signal. By using the first isolated power supply to perform electrical isolation processing on the voltage signal, the quality and reliability of the voltage signal are improved.

[0083] Exemplarily, the second resistor is used to perform current limiting processing and filtering processing on the first differential signal; the third resistor is used to perform current limiting processing and filtering processing on the second differential signal.

[0084] Exemplarily, the first isolation operational amplifier is used to convert the first differential signal and the second differential signal into a single-ended first analog voltage signal.

[0085] Exemplarily, the first differential signal and the second differential signal may be signals inverted from each other.

[0086] Figure 6This is a schematic diagram of the structure of the first contact adhesion detection circuit provided in the embodiment of the present application. Figure 6 As shown, HV+ represents the positive terminal of the power battery, resistors R1 to R6 represent the first resistors, charge- represents the right side of the first contact terminal of the second relay, VIN1 represents the input terminal of the first isolated power supply, VOUT1+ represents the first output terminal of the first isolated power supply, VOUT2- represents the second output terminal of the first isolated power supply, resistor R8 represents the second resistor, resistor R9 represents the third resistor, VOUT1P represents the first differential signal, VOUT2N represents the second differential signal, number 1 represents the first input terminal of the first isolated operational amplifier, number 2 represents the second input terminal of the first isolated operational amplifier, number 3 represents the output terminal of the first isolated operational amplifier, TP1101 to TP1104 represent different test points, and C1 to C7 represent capacitors.

[0087] It should be noted that the resistance values ​​of resistors R1 to R14 can be the same or different, and the capacitance values ​​of capacitors C1 to C7 can be the same or different. The specific resistance values ​​of different resistors and the capacitance values ​​of different capacitors can be determined according to actual application requirements, and this application does not limit this.

[0088] Among them, resistors R1 to R6 are used to divide the voltage output from the positive terminal of the power battery, resistor R7 is used to current limit and / or filter the voltage after electrostatic protection and high-frequency filtering by capacitor C1, resistors R8 and R10 are used to current limit and / or filter the first differential signal, resistors R9 and R11 are used to current limit and / or filter the second differential signal, resistors R12, R13 and R14 are used to filter and / or current limit the corresponding voltage signal; capacitors C1 to C7 are used to perform electrostatic protection and high-frequency filtering on the response voltage signal.

[0089] from Figure 6 It can be seen that by dividing the voltage signal output from the input end of the first contact adhesion detection circuit, and converting the voltage signal after the voltage division into a differential signal through the first isolation power supply, the differential voltage signal is further converted into a single-ended first analog voltage signal through the first isolation operational amplifier, and the first analog voltage signal is input to the main chip in the power domain controller through the output end of the first contact adhesion detection circuit, the voltage V2 at both ends of the first contact adhesion detection circuit can be detected by the main chip.

[0090] Combine the following Figure 7 The second contact adhesion detection circuit provided in the embodiment of the present application is described in detail.

[0091] Figure 7This is a schematic diagram of the principle of the second contact adhesion detection circuit provided in the embodiment of the present application. Figure 7 As shown, the second contact adhesion detection circuit includes a fourth resistor 291, a second isolated power supply 292, a fifth resistor 293, a sixth resistor 294 and a second isolated operational amplifier 295;

[0092] Among them, one end of the fourth resistor serves as the input end of the second contact adhesion detection circuit, the other end of the fourth resistor is connected to the input end of the second isolation power supply, the first output end of the second isolation power supply is connected to the first input end of the second isolation operational amplifier via the fifth resistor, the second output end of the second isolation power supply is connected to the second input end of the second isolation operational amplifier via the sixth resistor, and the output end of the second isolation operational amplifier serves as the output end of the second contact adhesion detection circuit.

[0093] For example, the fourth resistor may include multiple resistors with the same or different resistance values. The fourth resistor is used to divide the voltage output by the positive electrode of the power battery. In the embodiment of the present application, the number of resistors in the fourth resistor and the resistance values ​​of different resistors are not limited, and can be determined according to actual application requirements.

[0094] Exemplarily, the second isolated power supply is used to convert the voltage signal passing through the fourth resistor into a differential signal, that is, the voltage signal passing through the fourth resistor is converted into a third differential signal and a fourth differential signal. By using the second isolated operational amplifier to perform electrical isolation processing on the voltage signal, the quality and reliability of the voltage signal are improved.

[0095] Exemplarily, the fifth resistor is used to perform current limiting processing and filtering processing on the third differential signal; the sixth resistor is used to perform current limiting processing and filtering processing on the fourth differential signal.

[0096] Exemplarily, the second isolation operational amplifier is used to convert the third differential signal and the fourth differential signal into a single-ended second analog voltage signal.

[0097] Exemplarily, the third differential signal and the fourth differential signal may be signals inverted from each other.

[0098] Figure 8 Schematic diagram of the structure of the second contact adhesion detection circuit provided in the embodiment of the present application. Figure 8As shown, charge+ represents the left side of the second contact end of the first relay, resistors R15 to R20 represent the fourth resistor, charge- represents the right side of the first contact end of the second relay, VIN2 represents the input end of the second isolated power supply, VOUT3+ represents the first output end of the second isolated power supply, VOUT4- represents the second output end of the second isolated power supply, resistor R22 represents the fifth resistor, resistor R23 represents the sixth resistor, VOUT3P represents the third differential signal, VOUT4N represents the fourth differential signal, number 4 represents the first input end of the second isolated operational amplifier, number 5 represents the second input end of the second isolated operational amplifier, number 6 represents the output end of the second isolated operational amplifier, TP1105 to TP1108 represent different test points, and C8 to C14 represent capacitors.

[0099] It should be noted that the resistance values ​​of resistors R15 to R28 can be the same or different, and the capacitance values ​​of capacitors C8 to C14 can be the same or different. The specific resistance values ​​of different resistors and the capacitance values ​​of different capacitors can be determined according to actual application requirements, and this application does not limit this.

[0100] Among them, resistors R15 to R20 are used to divide the voltage output from the positive terminal of the power battery, resistor R21 is used to current limit and / or filter the voltage after electrostatic protection and high-frequency filtering by capacitor C8, resistors R22 and R24 are used to current limit and / or filter the third differential signal, resistors R25 and R26 are used to current limit and / or filter the fourth differential signal, resistors R26, R27 and R28 are used to filter and / or current limit the corresponding voltage signal; capacitors C8 to C14 are used to perform electrostatic protection and high-frequency filtering on the response voltage signal.

[0101] from Figure 8 It can be seen that by dividing the voltage signal output from the input end of the second contact adhesion detection circuit, and converting the voltage signal after the voltage division into a differential signal through the second isolation power supply, the differential voltage signal is further converted into a single-ended second analog voltage signal through the second isolation operational amplifier, and the second analog voltage signal is input to the main chip in the power domain controller through the output end of the second contact adhesion detection circuit, the voltage V3 at both ends of the second contact adhesion detection circuit can be detected by the main chip.

[0102] Optionally, in the power domain controller provided in the embodiment of the present application, the BMS and the electromagnetic coil in the fast charging relay are connected through a first wiring harness, and the fast charging relay and the fast charging socket are connected through a second wiring harness.

[0103] Exemplarily, the first wire harness may be a low-voltage wire harness, and the second wire harness may be a high-voltage wire harness.

[0104] Optionally, a harness voltage of the second harness is greater than a harness voltage of the first harness.

[0105] Optionally, an embodiment of the present application also provides a vehicle, which includes a vehicle body and a power battery and a fast charging socket arranged in the vehicle body, and a power domain controller as provided in the above embodiments, and the power domain controller and the fast charging socket are arranged adjacent to each other.

[0106] Exemplarily, the power battery may be disposed in the rear compartment of the vehicle.

[0107] Optionally, the power domain controller and the fast charging socket are arranged adjacent to the front compartment of the vehicle body.

[0108] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A power domain controller, characterized in that: The power domain controller and the fast charging socket are arranged adjacent to each other, and the power domain controller integrates a battery management system BMS and a fast charging relay. The BMS is connected to the electromagnetic coil in the fast charging relay, and the driving circuit in the BMS is used to drive the fast charging relay; the fast charging relay is connected to the fast charging socket.

2. The power domain controller according to claim 1, characterized in that: The fast charging relay includes a first relay and a second relay, the first contact end of the first relay is connected to the positive terminal of the fast charging socket, and the second contact end of the first relay is connected to the positive terminal of the power battery; The first contact end of the second relay is connected to the negative terminal of the fast charging socket, and the second contact end of the second relay is connected to the negative terminal of the power battery.

3. The power domain controller according to claim 2, characterized in that: The drive circuit comprises: a first relay drive circuit and a second relay drive circuit; The first relay driving circuit is arranged in parallel with the electromagnetic coil in the first relay; The second relay driving circuit is arranged in parallel with the electromagnetic coil in the second relay.

4. The power domain controller according to claim 2 or 3, characterized in that: The power domain controller is also integrated with a first contact adhesion detection circuit and a second contact adhesion detection circuit; The input end of the first contact adhesion detection circuit is connected to the positive terminal of the power battery, the output end of the first contact adhesion detection circuit is connected to the first contact end of the second relay, and the first contact adhesion detection circuit is used to detect whether the second relay is adhered; The input end of the second contact adhesion detection circuit is connected to the first contact end of the first relay, the output end of the second contact adhesion detection circuit is connected to the first contact end of the second relay, and the second contact adhesion detection circuit is used to detect whether the first relay is adhered.

5. The power domain controller according to claim 4, characterized in that: The first contact adhesion detection circuit includes: a first resistor, a first isolated power supply, a second resistor, a third resistor and a first isolated operational amplifier; One end of the first resistor serves as the input end of the first contact adhesion detection circuit, the other end of the first resistor is connected to the input end of the first isolated power supply, the first output end of the first isolated power supply is connected to the first input end of the first isolated operational amplifier via the second resistor, the second output end of the first isolated power supply is connected to the second input end of the first isolated operational amplifier via the third resistor, and the output end of the first isolated operational amplifier serves as the output end of the first contact adhesion detection circuit.

6. The power domain controller according to claim 4, characterized in that: The second contact adhesion detection circuit includes: a fourth resistor, a second isolated power supply, a fifth resistor, a sixth resistor and a second isolated operational amplifier; One end of the fourth resistor serves as the input end of the second contact adhesion detection circuit, the other end of the fourth resistor is connected to the input end of the second isolated power supply, the first output end of the second isolated power supply is connected to the first input end of the second isolation operational amplifier via the fifth resistor, the second output end of the second isolated power supply is connected to the second input end of the second isolation operational amplifier via the sixth resistor, and the output end of the second isolation operational amplifier serves as the output end of the second contact adhesion detection circuit.

7. The power domain controller according to any one of claims 1 to 3, characterized in that: The BMS and the electromagnetic coil in the fast charging relay are connected through a first wiring harness, and the fast charging relay and the fast charging socket are connected through a second wiring harness.

8. The power domain controller according to claim 7, characterized in that: A harness voltage of the second harness is greater than a harness voltage of the first harness.

9. A vehicle, characterized in that: It comprises a vehicle body, a power battery arranged in the vehicle body, a fast charging socket, and a power domain controller as described in any one of claims 1 to 7, wherein the power domain controller and the fast charging socket are arranged adjacent to each other.

10. The vehicle according to claim 9, characterized in that The power domain controller and the fast charging socket are arranged adjacent to the front compartment of the vehicle body.

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