Electric device, in-vehicle circuit, and vehicle

Abstract

The application relates to an electrical device, a vehicle-mounted circuit and a vehicle, wherein the electrical device is at least adapted to be electrically connected to a busbar of the vehicle; the electrical device comprises: a busbar-side capacitor which is at least adapted to be electrically connected to the busbar of the vehicle; a busbar voltage detection circuit which is at least used for detecting the voltage of the busbar; and a discharge circuit which is used for realizing charge discharge in the electrical device; wherein the discharge circuit and the busbar voltage detection circuit are integrated into one whole. The application has the beneficial effect of optimizing the vehicle-mounted circuit architecture and facilitating the modularized installation of the electrical device through the integrated design.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and more particularly to an electrical device, vehicle circuit, and vehicle. Background Technology

[0002] Vehicles that use electric motors to generate power typically have a battery, a voltage regulating circuit, and a bus. The battery provides the electrical energy required by the motor. The voltage regulating circuit converts DC voltage to meet the motor's driving requirements, or makes the voltage generated by the motor suitable for charging the battery or powering the compressor. The bus is used at least to transmit electrical energy from the voltage regulating circuit to the motor's inverter circuit.

[0003] In related technologies, the capacitor assembly between the battery and the voltage regulator circuit is treated as a separate device, which facilitates selection based on the battery and voltage regulator circuit specifications.

[0004] However, the current level of integration of capacitor components is relatively low. Utility Model Content

[0005] This application provides an electrical device, an on-board circuit, and a vehicle, which improves the integration level of the electrical device and at least partially solves the above-mentioned technical problems.

[0006] To achieve the above objectives, according to a first aspect of this application, an electrical device is provided, at least adapted to be electrically connected to a busbar of a vehicle, the electrical device comprising: a busbar voltage detection circuit for detecting the voltage of the busbar; and a discharge circuit for discharging charge from the electrical device; wherein the discharge circuit and the busbar voltage detection circuit are integrated into a single unit.

[0007] Optionally, in some embodiments of this application, the electrical device further includes a filter circuit for implementing the filtering function of the electrical device.

[0008] Optionally, in some embodiments of this application, the filtering circuit includes a power supply filtering circuit for filtering the battery of the vehicle to which the electrical device is connected.

[0009] Optionally, in some embodiments of this application, the filtering circuit further includes: an EMC filtering circuit for eliminating electromagnetic interference of the battery connected to the battery connection terminal; wherein the power filtering circuit is electrically connected between the battery connection terminal and the EMC filtering circuit.

[0010] Optionally, in some embodiments of this application, the EMC filtering circuit is a multi-stage filtering circuit.

[0011] Optionally, in some embodiments of this application, the EMC filtering circuit is a two-stage filtering circuit, comprising: a first-stage filtering circuit for implementing first-stage filtering of the EMC filtering circuit; and a second-stage filtering circuit for implementing second-stage filtering of the EMC filtering circuit.

[0012] Optionally, in some embodiments of this application, the electrical device includes a battery connection terminal for electrically connecting the electrical device to the vehicle's battery.

[0013] Optionally, in some embodiments of this application, the electrical device further includes: a busbar connection terminal for electrically connecting the electrical device to the vehicle's busbar.

[0014] Optionally, in some embodiments of this application, the electrical device further includes: a voltage regulating connection terminal for electrically connecting the electrical device to the voltage regulating circuit of the vehicle.

[0015] Optionally, in some embodiments of this application, the voltage regulating connection terminal includes: a battery-side voltage regulating connection terminal for electrically connecting with the battery side of the voltage regulating circuit; and a bus-side voltage regulating connection terminal for electrically connecting with the battery side of the voltage regulating circuit.

[0016] Optionally, in some embodiments of this application, the electrical device further includes: a battery voltage detection circuit for detecting at least the voltage of the vehicle's battery; and a battery connection terminal for electrically connecting the electrical device to the battery; wherein the battery voltage detection circuit is electrically connected between the filter circuit and the battery connection terminal.

[0017] Optionally, in some embodiments of this application, the electrical device further includes: a battery-side capacitor, at least adapted to be electrically connected to the battery side of the vehicle's voltage regulation circuit.

[0018] Optionally, in some embodiments of this application, the electrical device further includes: a battery-side voltage regulating connection terminal for electrically connecting the electrical device to the battery side of the vehicle's voltage regulating circuit; wherein the battery-side capacitor is electrically connected to the battery-side voltage regulating connection terminal.

[0019] Optionally, in some embodiments of this application, the electrical device further includes a battery capacitor temperature detection circuit for detecting the temperature of the battery-side capacitor.

[0020] Optionally, in some embodiments of this application, the electrical device further includes: a bus-side voltage regulating connection terminal for electrically connecting the electrical device to the bus side of the vehicle's voltage regulating circuit; wherein the electrical device includes: a bus-side capacitor, at least adapted to be electrically connected to the vehicle's bus; the bus-side capacitor is electrically connected to the bus-side voltage regulating connection terminal.

[0021] Optionally, in some embodiments of this application, the bus voltage detection circuit is electrically connected between the bus-side capacitor and the discharge circuit.

[0022] Optionally, in some embodiments of this application, the electrical device further includes: a bus-side capacitor, at least adapted to be electrically connected to a bus of the vehicle; and a bus capacitor temperature detection circuit for detecting the temperature of the bus-side capacitor.

[0023] Optionally, in some embodiments of this application, the electrical device further includes: a battery-side capacitor, at least adapted to be electrically connected to the battery side of the vehicle's voltage regulation circuit; and a battery capacitor temperature detection circuit for detecting the temperature of the battery-side capacitor.

[0024] Optionally, in some embodiments of this application, the electrical device further includes: a composite connector for providing an interface for signals or power; wherein the bus capacitor temperature detection circuit and the battery capacitor temperature detection circuit are electrically connected to different connection terminals of the composite connector.

[0025] Optionally, in some embodiments of this application, the bus voltage detection circuit is electrically connected to the composite connector.

[0026] Optionally, in some embodiments of this application, the electrical device further includes: a battery voltage detection circuit, at least for detecting the voltage of the vehicle's battery; wherein the battery voltage detection circuit is electrically connected to the composite connector.

[0027] According to a second aspect of this application, an on-board circuit is provided, including the aforementioned electrical device.

[0028] Optionally, in some embodiments of this application, the vehicle circuit further includes a battery for providing electrical energy required by the vehicle; wherein the electrical device is electrically connected to the battery.

[0029] Optionally, in some embodiments of this application, the vehicle circuit further includes: an inverter circuit, for at least a motor for driving the vehicle; and a bus, for at least transmitting electrical energy to the inverter circuit; wherein the electrical device is electrically connected to the bus.

[0030] Optionally, in some embodiments of this application, the vehicle circuit further includes: an inverter circuit for at least driving a motor of the vehicle; and a voltage regulator circuit for converting voltage between the battery and the inverter circuit; wherein the electrical device is electrically connected to the battery side and the bus side of the voltage regulator circuit, respectively.

[0031] Optionally, in some embodiments of this application, a portion of the electrical device is electrically connected between the battery and the voltage regulating circuit; another portion of the electrical device is electrically connected between the busbar and the voltage regulating circuit.

[0032] According to a third aspect of this application, a vehicle is also provided, including the aforementioned electrical device or the aforementioned vehicle-mounted circuit.

[0033] The advantage of this application is that it optimizes the vehicle circuit architecture through integrated design and makes the electrical devices easy to install in a modular fashion.

[0034] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0037] Figure 1 This is a schematic diagram of the overall structure of the electrical device provided in an exemplary embodiment of this application;

[0038] Figure 2 This is a schematic diagram of the architecture of the electrical device provided in an exemplary embodiment of this application;

[0039] Figure 3 This is a schematic diagram of the architecture of the vehicle circuit provided in an exemplary embodiment of this application;

[0040] Figure 4 This is a circuit diagram of the vehicle-mounted circuit provided in an exemplary embodiment of this application;

[0041] Figure 5 This is a schematic diagram of the vehicle structure provided in an exemplary embodiment of this application.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Vehicle; 10. Onboard circuit; 100. Electrical device; 200. Battery; 300. Voltage regulating circuit; 400. Busbar; 500. Inverter circuit; 600. Motor; 700. Main control board; 101. Busbar side capacitor; 102. Busbar voltage detection circuit; 102a. Busbar voltage detection element; 103. Bleeding circuit; R. Bleeding resistor; 140. Filtering circuit; 141. Power supply filtering circuit; 141a. Power supply 142. Filter capacitor; 143. EMC filter circuit; 144. First-stage filter circuit; 143a. First-stage X capacitor; 143b. First-stage magnetic ring; 143c. First-stage Y capacitor; 144. Second-stage filter circuit; 144a. Second-stage X capacitor; 144b. Second-stage magnetic ring; 144c. Second-stage Y capacitor; 105. Battery connection terminal; 105a. Battery positive terminal; 105b. Battery negative terminal; 106. Busbar connection terminal 106a, Busbar positive terminal; 106b, Busbar negative terminal; 170, Voltage regulating connection terminal; 171, Battery-side voltage regulating connection terminal; 171a, Battery-side voltage regulating connection positive terminal; 171b, Battery-side voltage regulating connection negative terminal; 172, Busbar-side voltage regulating connection terminal; 172a, Busbar-side voltage regulating connection positive terminal; 172b, Busbar-side voltage regulating connection negative terminal; 108, Battery voltage detection circuit; 108a, Battery voltage detection element; 109, Battery-side capacitor; 110, Battery capacitor temperature detection circuit; RT1, Battery capacitor temperature detection element; 111, Busbar capacitor temperature detection circuit; RT2, Busbar capacitor temperature detection element; 112, Composite connector; 113, Busbar voltage detection connector; 114, Battery voltage detection connector; 115, Temperature detection connector; 120, Circuit board; 130, Device housing. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0045] Reference Figures 1 to 4As shown, as a first aspect of this application, this application provides an electrical device 100, which is at least adapted to connect a battery 200 (generally a power battery 200) of a vehicle 1 to a bus 400 of the vehicle 1 (generally a DC bus 400, and used to transmit electrical energy to an inverter circuit 500 of a motor 600 of the vehicle 1); the electrical device 100 is also adapted to electrically connect a voltage regulating circuit 300 (generally a DC-DC voltage regulating circuit 300) of the vehicle 1 between the battery 200 and the bus 400 to realize voltage conversion.

[0046] Reference Figure 3 and Figure 4 As shown, the battery 200 of vehicle 1 is used to output electrical energy when driving the motor 600, and can store electrical energy when the motor 600 generates electricity.

[0047] The specific solutions for the battery 200, voltage regulating circuit 300, bus 400, inverter circuit 500 and motor 600 of vehicle 1 are not the focus of this application, and the specific implementation schemes for the battery 200, voltage regulating circuit 300, bus 400, inverter circuit 500 and motor 600 of vehicle 1 are technologies known to those skilled in the art, and will not be described in detail here.

[0048] Reference Figure 2 As shown, the electrical device 100 of this application mainly includes: a bus-side capacitor 101, a bus voltage detection circuit 102, and a discharge circuit 103.

[0049] The bus-side capacitor 101 is at least electrically connected to the bus 400 of the vehicle 1; the bus voltage detection circuit 102 is at least used to detect the voltage of the bus 400; the discharge circuit 103 is used to discharge the charge of the bus-side capacitor 101; the discharge circuit 103 and the bus voltage detection circuit 102 are electrically connected and integrated into a whole.

[0050] Specifically, the bus voltage detection circuit 102 includes a bus voltage detection element 102a, which may be a semiconductor device for detecting voltage, or a circuit or device for performing voltage detection.

[0051] Reference Figure 1 As shown, the bus voltage detection circuit 102 and the discharge circuit 103 can be integrated into a single circuit board 120 (PCB board), that is, the bus voltage detection circuit 102 and the discharge circuit 103 can be implemented simultaneously using circuits and devices on a single circuit board 120.

[0052] Reference Figure 1As shown, as an optional solution, the bus voltage detection circuit 102 and the discharge circuit 103 can be respectively set on opposite sides of the circuit board 120, which can meet the requirements of high voltage electrical clearance and creepage distance.

[0053] As an alternative, the bus voltage detection circuit 102 and the discharge circuit 103 can also be integrated into a semiconductor device (such as a semiconductor chip) through methods such as semiconductor packaging and testing processes.

[0054] Reference Figure 1 As shown, the electrical device 100 of this application includes a device housing 130; the device housing 130 forms a receiving space; the components of the electrical device 100 can be disposed inside the receiving space; the device housing 130 can adopt a split structure to achieve assembly, and as an optional solution, the device housing 130 can also be designed as an open type and encapsulated with potting compound.

[0055] As a specific solution, in order to ensure the heat dissipation of the circuit board 120 (especially the discharge circuit 103), the circuit board 120 can be fixed to the electrical device 100 near the outside by potting compound, and can be a channel for the electrical device 100 to be near air cooling or water cooling, thereby ensuring the heat dissipation effect of the circuit board 120.

[0056] Specifically, the bus-side capacitor 101 smooths the voltage of the bus 400 and absorbs the pulse current generated by the inverter circuit 500 on the bus 400. The bus voltage detection circuit 102 is mainly used to detect the voltage of the bus 400, thereby feeding back the voltage data of the bus 400 to the main control board 700. The discharge circuit 103 is mainly used to realize the rapid discharge of the bus-side capacitor 101, thereby ensuring the responsiveness and safety of the bus-side capacitor 101. The bus-side capacitor 101 is also housed in the receiving space of the device housing 130 and can be fixed by means of potting compound or other methods.

[0057] In previous technical solutions, the bus-side capacitor 101 was packaged as a separate capacitor device; the bus voltage detection circuit 102 was generally integrated on the main control board 700 and then electrically connected to the bus 400 via cables or busbars; the discharge circuit 103 was also separately configured and electrically connected to the bus-side capacitor 101 via cables or busbars. The problem with this is that the main control board 700 simultaneously contains both high-voltage circuits (bus voltage detection circuit 102) and low-voltage circuits (logic control), requiring high- and low-voltage isolation on the main control board 700 and introducing certain safety risks. Furthermore, the excessively long discharge path between the bus-side capacitor 101 and the discharge circuit 103 affects the discharge effect.

[0058] By adopting the above solution, on the one hand, the distance between the bus-side capacitor 101 and the discharge circuit 103 is reduced, thereby shortening the discharge path, improving the safety of passive discharge, and simplifying the assembly of the bus-side capacitor 101 and the discharge circuit 103; on the other hand, the bus voltage detection circuit 102 is integrated into the electrical device 100, thereby avoiding the drawbacks of having the bus voltage detection circuit 102 on the main control board 700, improving the safety and usable area of ​​the main control board 700, and reducing the design difficulty. Combining these two points, it can be seen that the above solution optimizes the composition and assembly of the vehicle-mounted circuit 10 through integrated design.

[0059] Reference Figures 2 to 4 As shown, in some embodiments of this application, the electrical device 100 further includes a filter circuit 140. The filter circuit 140 is mainly used to implement the filtering function of the electrical device 100.

[0060] Specifically, the filter circuit 140 includes a power supply filter circuit 141 and an EMC (Electromagnetic Compatibility) filter circuit 142. The power supply filter circuit 141 filters the battery 200 of the vehicle 1 to which the electrical device 100 is connected; the EMC filter circuit 142 eliminates electromagnetic interference from the battery 200 connected to the battery connection terminal 105; the power supply filter circuit 141 is electrically connected between the battery connection terminal 105 and the EMC filter circuit 142. The power supply filter circuit 141 mainly filters the electrical energy supplied by the battery 200 to prevent fluctuations generated by the battery 200 from being introduced into the electrical components and the subsequent voltage regulation circuit 300.

[0061] Reference Figure 4 As shown, in a specific embodiment, the power supply filter circuit 141 includes two power supply filter capacitors 141a; the two power supply filter capacitors 141a are electrically connected to the positive terminal 105a and the negative terminal 105b of the battery connection, respectively, and the two power supply filter capacitors 141a have a common ground terminal.

[0062] The EMC filter circuit 142 is used to eliminate electromagnetic interference and improve the electromagnetic compatibility of the electrical device 100 of this application.

[0063] As a specific implementation, the EMC filter circuit 142 is a multi-stage filter circuit. For example, the EMC filter circuit 142 can be a two-stage filter circuit.

[0064] More specifically, the EMC filter circuit 142 may include a primary filter circuit 143 and a secondary filter circuit 144 to form a secondary filter circuit. The primary filter circuit 143 is used to implement the primary filtering of the EMC filter circuit 142; the secondary filter circuit 144 is used to implement the secondary filtering of the EMC filter circuit 142; the primary filter circuit 143 is electrically connected between the power supply filter circuit 141 and the secondary filter circuit 144.

[0065] That is, the EMC filter circuit 142 adopts a two-stage filtering process. Compared with only a single-stage filtering process, the two-stage filtering process can effectively reduce signal crosstalk. Furthermore, integrating the filter circuit 140 into the electrical device 100 can effectively simplify assembly.

[0066] If only a single-stage filter is used, the shielding capability of the vehicle's wiring harness must be high. Furthermore, as vehicle functions increase, the complexity of the wiring harness also increases. Achieving consistently high shielding standards throughout the wiring harness would increase production costs and hinder efficient detection and troubleshooting when wiring harness damage leads to overall EMC performance degradation. This application, however, significantly reduces the wiring harness requirements by using a two-stage filter at critical points, while also facilitating efficient EMC performance adjustments. Moreover, compared to three-stage or more advanced filters, the two-stage filter solution offers substantial advantages in terms of reliability and cost.

[0067] As an optional option, refer to Figure 4 As shown, the primary filter circuit 143 includes: a primary X capacitor 143a, two primary Y capacitors 143cc, and a primary magnetic ring 143b. The two ends of the primary X capacitor 143a are electrically connected to the positive terminal 105a and the negative terminal 105b of the battery, respectively. The two primary Y capacitors 143cc are electrically connected to the positive terminal 105a and the negative terminal 105b of the battery, respectively. The two primary Y capacitors 143cc have a common ground terminal.

[0068] Similarly, the secondary filter circuit 144 includes: a secondary X capacitor 144a, a secondary Y capacitor 144cc, and a secondary magnetic ring 144b; the two ends of the secondary X capacitor 144a are electrically connected to the positive terminal 105a and the negative terminal 105b of the battery, respectively, while the two secondary Y capacitors 144cc are electrically connected to the positive terminal 105a and the negative terminal 105b of the battery, respectively, and the two secondary Y capacitors 144cc have a common ground terminal; the difference is that in the primary filter circuit 143, the primary X capacitor 143a is located on the side closer to the battery 200; while in the secondary filter circuit 144, the secondary X capacitor 144a is located on the side farther away from the battery 200.

[0069] In addition, the primary magnetic ring 143b is fitted on the circuit between the two primary Y capacitors 143cc and the two secondary Y capacitors 144cc; the secondary magnetic ring 144b is fitted on the circuit between the two secondary Y capacitors 144cc and the battery-side capacitor 109.

[0070] Reference Figures 2 to 4 As shown, in some embodiments of this application, the electrical device 100 further includes a battery-side capacitor 109. The battery-side capacitor 109 is at least adapted to be electrically connected to the battery 200 side of the voltage regulating circuit 300 of the vehicle 1. The battery-side capacitor 109 functions to smooth the voltage of the line output to the voltage regulating circuit 300.

[0071] Reference Figures 2 to 4 As shown, in some embodiments of this application, the electrical device 100 further includes: a battery connection terminal 105, a bus connection terminal 106, and a voltage regulating connection terminal 170.

[0072] Among them, the battery connection terminal 105 is used to electrically connect the electrical device 100 to the battery 200 of the vehicle 1; the bus connection terminal 106 is used to electrically connect the electrical device 100 to the bus 400 of the vehicle 1; and the voltage regulating connection terminal 170 is used to electrically connect the electrical device 100 to the voltage regulating circuit 300 of the vehicle 1.

[0073] Specifically, the battery connection terminal 105 includes a positive battery connection terminal 105a and a negative battery connection terminal 105b. The positive battery connection terminal 105a is used to connect to the positive terminal of the battery 200 of the vehicle 1; the negative battery connection terminal 105b is used to connect to the negative terminal of the battery 200 of the vehicle 1. (Refer to...) Figure 4 As shown, the line connected to the positive terminal 105a of the battery can be called the positive power supply line (not shown in the figure); the line connected to the negative terminal 105b of the battery can be called the negative power supply line (not shown in the figure). It can be understood that connecting to the positive power supply line and the negative power supply line is equivalent to connecting to the positive terminal 105a of the battery and the negative terminal 105b of the battery.

[0074] In the electrical device 100 of this application, the bus voltage detection element 102a, the primary X capacitor 143a, the secondary X capacitor 144a, the battery-side capacitor 109, etc., are sequentially connected between the positive power supply line and the negative power supply line.

[0075] Specifically, the bus connection terminal 106 includes a positive bus connection terminal 106a and a negative bus connection terminal 106b, which are used to connect to the positive and negative wires of the bus 400 of the vehicle 1, respectively. The bus connection terminal 106 is mainly used to transmit the electrical energy processed by the electrical device 100 to the bus 400 and the inverter circuit 500 connected to the bus 400.

[0076] Specifically, since the voltage regulating circuit 300 needs to transmit electrical energy to the battery 200 and the inverter circuit 500 (through the bus 400) respectively, the voltage regulating circuit 300 has connection terminals on the battery 200 side and the bus 400 side; correspondingly, the voltage regulating connection terminal 170 of the electrical device 100 of this application includes: a battery-side voltage regulating connection terminal 171 and a bus-side voltage regulating connection terminal 172; the battery-side voltage regulating connection terminal 171 is used to form an electrical connection with the battery 200 side of the voltage regulating circuit 300; the bus-side voltage regulating connection terminal 172 is used to form an electrical connection with the battery 200 side of the voltage regulating circuit 300.

[0077] More specifically, the battery-side voltage regulating connection terminal 171 includes a positive terminal 171a for battery 200 and a negative terminal 171b for battery 200. The bus-side voltage regulating connection terminal 172 includes a positive terminal 172a for bus 400 and a negative terminal 172b for bus 400.

[0078] Reference Figures 2 to 4 As shown, in some embodiments of this application, the electrical device 100 further includes a battery voltage detection circuit 108. The battery voltage detection circuit 108 is used at least to detect the voltage of the battery 200 of the vehicle 1. The battery voltage detection circuit 108 is electrically connected between the filter circuit 140 and the battery connection terminal 105. More specifically, the battery voltage detection circuit 108 includes a battery voltage detection element 108a, which can be a semiconductor device for detecting voltage or a circuit or device for performing voltage detection. The battery voltage detection element 108a can be connected between the positive battery connection terminal 105a and the negative battery connection terminal 105b.

[0079] It should be noted that, in this application, "circuit A (or element) is electrically connected between circuit B (element) and circuit C (element)" includes: from the perspective of the physical connection constituting the electrical connection, circuit A is electrically connected to circuit B and circuit C respectively; from the perspective of current flow, circuit A is located between circuit B and circuit C in the direction of current flow.

[0080] Reference Figures 2 to 4 As shown, in some embodiments of this application, the electrical device 100 further includes a bus capacitor temperature detection circuit 111 and a battery capacitor temperature detection circuit 110. The bus capacitor temperature detection circuit 111 is used to detect the temperature of the bus-side capacitor 101; the battery capacitor temperature detection circuit 110 is used to detect the temperature of the battery-side capacitor 109.

[0081] Specifically, the bus capacitor temperature detection circuit 111 includes a bus capacitor temperature detection element RT2, such as a thermistor.

[0082] Specifically, the battery capacitor temperature detection circuit 110 includes a battery 200 capacitor temperature detection element, such as a thermistor.

[0083] The bus capacitor temperature sensing element RT2 can be positioned near the bus-side capacitor 101 to achieve temperature detection; similarly, the battery 200 capacitor temperature sensing element can also be positioned near the battery-side capacitor 109 to achieve temperature detection.

[0084] The bus capacitor temperature detection circuit 111 and the battery capacitor temperature detection circuit 110 can transmit data to the main control board 700 through independent interfaces.

[0085] Reference Figure 1 As shown, a separate temperature detection connector 115 can be set up so that its different pins are electrically connected to the bus capacitor temperature detection circuit 111 and the battery capacitor temperature detection circuit 110 respectively; the temperature detection connector 115 can be plugged into the connector on the main control board 700 to transmit temperature sampling signals.

[0086] Similarly, refer to Figure 1 As shown, the bus voltage detection connector 113 and the battery voltage detection connector 114 can also be configured to independently transmit the signals of the bus voltage detection circuit 102 and the battery voltage detection circuit 108 to the main control board 700.

[0087] As an optional solution, refer to Figure 3 As shown, the electrical device 100 of this application also includes a composite connector 112. The composite connector 112 is used to provide an interface for signal or power, thereby enabling the transmission of electrical energy or the interaction of signals with the DSP (Digital Signal Processing) chip of the main control board 700.

[0088] The aforementioned temperature detection connector 115, bus voltage detection connector 113, battery voltage detection connector 114, and low-voltage power supply interface of electrical device 100 can all be integrated into composite connector 112. The electrical energy of low-voltage circuits or components in electrical device 100 can be accessed from the main control board 700 through composite connector 112.

[0089] As a specific solution, the bus voltage detection circuit 102 is electrically connected to the composite connector 112 indirectly. An isolation circuit (not shown in the figure) is provided between the bus voltage detection circuit 102 and the composite connector 112 to isolate high and low voltages and perform voltage conversion. Because the bus voltage is high, it cannot be directly output to the composite connector 112, but it can be converted and isolated through methods such as coil coupling before being output to the composite connector 112. Of course, other isolation and voltage reduction circuit schemes can also be used. As a specific solution, this isolation circuit can be integrated on the circuit board 120.

[0090] This further optimizes the architecture of the vehicle circuit 10, reducing the use of wiring harnesses and copper busbars.

[0091] Reference Figure 3 and Figure 4 As shown, this application also provides an on-board circuit 10, which mainly includes the above-mentioned electrical device 100.

[0092] More specifically, the vehicle-mounted circuit 10 of this application further includes: a battery 200, a voltage regulating circuit 300, a bus 400, an inverter circuit 500, and a motor 600. The battery 200 provides the electrical energy required by the vehicle 1; the voltage regulating circuit 300 converts the voltage between the battery 200 and the inverter circuit 500; the inverter circuit 500 drives at least the motor 600 of the vehicle 1; the bus 400 transmits electrical energy to at least the inverter circuit 500; and the motor 600 can output both power and electrical energy. The electrical device 100 is electrically connected to the battery 200; the electrical device 100 is electrically connected to the bus 400; and the electrical device 100 is electrically connected to both the battery 200 side and the bus 400 side of the voltage regulating circuit 300.

[0093] The specific structures of the voltage regulation circuit 300 and the inverter circuit 500 can be adopted. Figure 4 The scheme shown includes a bidirectional DC-DC voltage regulator circuit 300. The inverter circuit 500 can be constructed using a six-arm full-bridge circuit. This part is not the focus of this application and will not be elaborated upon here.

[0094] Reference Figure 3 As shown, it can be understood that a portion of the electrical device 100 (battery voltage detection circuit 108, filter circuit 140, battery-side capacitor 109) is electrically connected between the battery 200 and the voltage regulating circuit 300; another portion of the electrical device 100 (bus-side capacitor 101 and discharge circuit 103) is electrically connected between the bus 400 and the voltage regulating circuit 300.

[0095] Reference Figure 4As shown, in the vehicle circuit 10 of this application, the battery connection negative terminal 105b, the bus connection negative terminal 106b, the battery 200 side voltage regulator connection negative terminal 171b, and the bus 400 side voltage regulator connection negative terminal 172b are actually all grounded. Therefore, referring to... Figure 1 As shown, the same hardware copper busbars can be used to simultaneously form the battery connection negative terminal 105b, bus connection negative terminal 106b, battery 200 side voltage regulation connection negative terminal 171b, and bus 400 side voltage regulation connection negative terminal 172b in the vehicle circuit 10.

[0096] Conversely, in the vehicle circuit 10 of this application, the battery connection positive terminal 105a and the battery 200 side voltage regulation connection positive terminal 171a can be constructed using the same hardware copper busbar; while the bus connection positive terminal 106a and the bus 400 side voltage regulation connection positive terminal 172a can also be constructed using the same hardware copper busbar.

[0097] Reference Figure 5 As shown, this application also provides a vehicle 1, which includes the above-described electrical device 100 or the above-described vehicle circuit 10.

[0098] The vehicle 1 has all the beneficial effects of the aforementioned electrical device 100 or the aforementioned on-board circuit 10, which will not be repeated here. The vehicle 1 may be a plug-in hybrid electric vehicle or a new energy vehicle, etc., and this application does not specifically limit it.

[0099] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0100] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0101] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0102] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An electrical device, at least adapted for electrical connection to a vehicle busbar; characterized in that: The electrical device includes: A bus voltage detection circuit is used to detect the voltage of the bus. A discharge circuit is used to discharge the charge in the electrical device; The discharge circuit and the bus voltage detection circuit are integrated into a single unit.

2. The electrical device according to claim 1, characterized in that: The electrical device also includes: A filtering circuit is used to implement the filtering function of the electrical device.

3. The electrical device according to claim 2, characterized in that: The filtering circuit includes: A power supply filtering circuit is used to filter the battery of the vehicle to which the electrical device is connected.

4. The electrical device according to claim 3, characterized in that: The filtering circuit also includes: An EMC filter circuit is used to eliminate electromagnetic interference from the battery connected to the battery connection terminal. The power supply filter circuit is electrically connected between the battery connection terminal and the EMC filter circuit.

5. The electrical device according to claim 4, characterized in that: The EMC filtering circuit is a multi-stage filtering circuit.

6. The electrical device according to claim 5, characterized in that: The EMC filter circuit is a two-stage filter circuit, and the EMC filter circuit includes: A primary filtering circuit is used to implement the primary filtering of the EMC filtering circuit. A secondary filter circuit is used to implement the secondary filtering of the EMC filter circuit.

7. The electrical device according to any one of claims 1 to 6, characterized in that: The electrical device includes: Battery connection terminals are used to electrically connect the electrical device to the vehicle's battery.

8. The electrical device according to claim 7, characterized in that: The electrical device also includes: Busbar connection terminals are used to electrically connect the electrical device to the vehicle's busbar.

9. The electrical device according to claim 8, characterized in that: The electrical device also includes: A voltage regulating connection terminal is used to electrically connect the electrical device to the vehicle's voltage regulating circuit.

10. The electrical device according to claim 9, characterized in that: The voltage regulating connection terminal includes: A battery-side voltage regulation connection terminal is used to form an electrical connection with the battery side of the voltage regulation circuit; The bus-side voltage regulating connection terminal is used to form an electrical connection with the battery side of the voltage regulating circuit.

11. The electrical device according to any one of claims 2 to 6, characterized in that: The electrical device also includes: A battery voltage detection circuit, used at least to detect the voltage of the vehicle's battery; A battery connection terminal for electrically connecting the electrical device to the battery; The battery voltage detection circuit is electrically connected between the filter circuit and the battery connection terminal.

12. The electrical device according to claim 11, characterized in that: The electrical device also includes: A battery-side capacitor, at least suitable for electrical connection to the battery side of the vehicle's voltage regulation circuit.

13. The electrical device according to claim 12, characterized in that: The electrical device also includes: A battery-side voltage regulating connection terminal is used to make an electrical connection between the electrical device and the battery side of the vehicle's voltage regulating circuit. The battery-side capacitor is electrically connected to the battery-side voltage regulating terminal.

14. The electrical device according to claim 13, characterized in that: The electrical device also includes: A battery capacitor temperature detection circuit is used to detect the temperature of the battery-side capacitor.

15. The electrical device according to any one of claims 2 to 6, characterized in that: The electrical device also includes: The bus-side voltage regulating connection terminal is used to make an electrical connection between the electrical device and the bus side of the vehicle's voltage regulating circuit. The electrical device includes: Busbar-side capacitors, at least suitable for electrical connection to the vehicle's busbars; The bus-side capacitor is electrically connected to the bus-side voltage regulating terminal.

16. The electrical device according to claim 15, characterized in that: The bus voltage detection circuit is electrically connected between the bus-side capacitor and the discharge circuit.

17. The electrical device according to any one of claims 2 to 6, characterized in that: The electrical device also includes: Busbar-side capacitors, at least suitable for electrical connection to the vehicle's busbars; A bus capacitor temperature detection circuit is used to detect the temperature of the bus-side capacitor.

18. The electrical device according to claim 17, characterized in that: The electrical device also includes: A battery-side capacitor, at least suitable for electrical connection to the battery side of the vehicle's voltage regulation circuit; A battery capacitor temperature detection circuit is used to detect the temperature of the battery-side capacitor.

19. The electrical device according to claim 18, characterized in that: The electrical device also includes: Composite connectors are interfaces used to provide signals or power. The bus capacitor temperature detection circuit and the battery capacitor temperature detection circuit are electrically connected to different connection terminals of the composite connector.

20. The electrical device according to claim 19, characterized in that: wherein, The bus voltage detection circuit is electrically connected to the composite connector.

21. The electrical device according to claim 20, characterized in that: The electrical device also includes: A battery voltage detection circuit, used at least to detect the voltage of the vehicle's battery; The battery voltage detection circuit is electrically connected to the composite connector.

22. A vehicle-mounted circuit, characterized in that: The vehicle-mounted circuit includes the electrical device as described in any one of claims 1 to 20.

23. The vehicle-mounted circuit according to claim 22, characterized in that: The vehicle-mounted circuit also includes: Batteries are used to provide the electrical energy needed by vehicles; The electrical device is electrically connected to the battery.

24. The vehicle-mounted circuit according to claim 23, characterized in that: The vehicle-mounted circuit also includes: Inverter circuit, at least used to drive the motor of a vehicle; The busbar transmits electrical energy to at least the inverter circuit; The electrical device is electrically connected to the busbar.

25. The vehicle-mounted circuit according to claim 23, characterized in that: The vehicle-mounted circuit also includes: Inverter circuit, at least used to drive the motor of a vehicle; A voltage regulation circuit is used to convert the voltage between the battery and the inverter circuit; The electrical device is electrically connected to the battery side and the bus side of the voltage regulating circuit, respectively.

26. The vehicle-mounted circuit according to claim 25, characterized in that: A portion of the electrical device is electrically connected between the battery and the voltage regulating circuit; Another part of the electrical device is electrically connected between the busbar and the voltage regulating circuit.

27. A vehicle, characterized in that: The vehicle includes the electrical device as described in any one of claims 1 to 21 or the on-board circuit as described in any one of claims 22 to 26.

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