Detection device, vehicle, battery manager and loop control method, system

Abstract

The application discloses a detection device, a vehicle, a battery manager, a loop control method and system. The detection device comprises a detection circuit. The detection circuit is connected with an alternating current charging port of the vehicle to form a detection loop. The detection loop is suitable for triggering the vehicle to perform high-voltage loop disconnection control. The detection device can simply and conveniently make the high-voltage loop of the vehicle in a disconnected state.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a detection device, a vehicle, a battery manager, and a circuit control method and system. Background Technology

[0002] Currently, mainstream new energy vehicle manufacturers generally employ two solutions for maintenance and emergency high-voltage disconnection: high-voltage maintenance switches and low-voltage maintenance switches. High-voltage maintenance switches are typically used in commercial vehicles, adding a physical switch to disconnect the high-voltage circuit. Low-voltage maintenance switches are generally used in passenger vehicles, where the Battery Management Controller (BMC) or other controllers monitor the status of the low-voltage maintenance switch and disconnect the high-voltage circuit when it is detected as open. However, both of these solutions have the following drawbacks:

[0003] (1) Both options require additional costs, which is not conducive to the promotion of new energy vehicles;

[0004] (2) Due to limitations such as the battery pack structure and waterproofing requirements of passenger vehicles, the high-voltage maintenance switch solution is not applicable to passenger vehicles;

[0005] (3) The switch positions involved in the two schemes are different depending on the car manufacturer, model, etc. When a new energy vehicle safety accident occurs, it is not convenient for firefighters, traffic police, etc. to perform emergency disconnection of high voltage. Summary of the Invention

[0006] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the object of this invention is to provide a detection device, vehicle, battery manager, and circuit control method and system to simply and conveniently disconnect the high-voltage circuit of a vehicle.

[0007] In a first aspect, the present invention provides a detection device comprising: a detection circuit for connecting to an AC charging port of a vehicle to form a detection circuit, the detection circuit being adapted to trigger the vehicle to perform high-voltage circuit disconnection control.

[0008] In addition, the connector according to the above embodiments of the present invention may also have the following additional technical features:

[0009] According to one embodiment of the present invention, the first end of the detection circuit is used to connect to the charging connection confirmation terminal of the AC charging port, and the second end of the detection circuit is used to connect to the vehicle ground terminal of the AC charging port.

[0010] According to one embodiment of the present invention, the detection device further includes: a first connector connected to a first end of the detection circuit for establishing a connection between the first end of the detection circuit and the charging connection confirmation terminal.

[0011] According to one embodiment of the present invention, the detection device further includes: a second connector connected to a second end of the detection circuit, for establishing a connection between the second end of the detection circuit and the vehicle body ground terminal.

[0012] According to one embodiment of the present invention, the AC charging port is provided with an AC charging socket, and the first connector includes a first plug, which is adapted to be matched with the socket of the charging connection confirmation terminal provided on the AC charging socket.

[0013] According to one embodiment of the present invention, the second connector includes a second plug adapted to mate with a socket of the vehicle body ground terminal provided on the AC charging socket.

[0014] According to one embodiment of the present invention, the detection circuit includes a first resistor, a first end of which is used to connect to the charging connection confirmation terminal, and a second end of which is used to connect to the vehicle body ground terminal.

[0015] According to one embodiment of the present invention, the detection device is adapted to be inserted into the AC charging port to form the detection circuit.

[0016] According to one embodiment of the present invention, the detection device is configured as a connector having a plug connected to the detection circuit and adapted to be inserted into the AC charging port.

[0017] According to one embodiment of the present invention, the resistance value of the detection circuit is different from the charging connection confirmation resistance value required by the charging standard.

[0018] Secondly, the present invention proposes a high-voltage circuit control method, comprising: when the AC charging port of the vehicle is connected to the detection circuit of the above-mentioned detection device to form a detection circuit, controlling the high-voltage circuit of the vehicle to be in an open state.

[0019] In addition, the high-voltage circuit control method according to the above embodiments of the present invention may also have the following additional technical features:

[0020] According to one embodiment of the present invention, the method further includes: when the vehicle speed is less than or equal to a vehicle speed threshold and the detection circuit is in operation, controlling the high-voltage circuit of the vehicle to be in an open state.

[0021] According to one embodiment of the present invention, when the detection circuit is formed, the method further includes: sending an alarm signal to the vehicle controller of the vehicle, so that the vehicle controller controls the high voltage power-on indicator light of the vehicle to turn off and / or locks the vehicle in the parking position.

[0022] According to one embodiment of the present invention, when the detection circuit is formed, the method further includes: sending an alarm signal to the vehicle's instrument panel and / or on-board terminal to cause the instrument panel and / or the on-board terminal to issue a high-voltage power-off warning message.

[0023] Thirdly, the present invention proposes a battery manager, including a memory, a processor, and a computer program stored in the memory, wherein when the computer program is executed by the processor, it implements the above-mentioned high-voltage circuit control method.

[0024] Fourthly, the present invention provides a vehicle comprising: an AC charging port, a high-voltage circuit, and a controller; wherein the controller is connected to the high-voltage circuit and is used to control the high-voltage circuit to be in an open state when the AC charging port is connected to the detection circuit of the aforementioned detection device to form a detection circuit.

[0025] In addition, the vehicle according to the above embodiments of the present invention may also have the following additional technical features:

[0026] According to one embodiment of the present invention, a first end of the detection circuit is used to connect to the charging connection confirmation terminal of the AC charging port, and a second end of the detection circuit is used to connect to the vehicle ground terminal of the AC charging port; wherein, the controller is connected to the charging connection confirmation terminal and is used to determine whether the detection loop is formed based on the charging connection signal transmitted by the charging connection confirmation terminal.

[0027] According to one embodiment of the present invention, the charging connection signal is the detection point voltage corresponding to the charging connection confirmation terminal, and the controller is used to: determine that the detection circuit is formed when the detection point voltage is a first preset voltage; wherein, when the charging port is connected to the charging gun, the detection point voltage is a second preset voltage value, and the second preset voltage is different from the first preset voltage.

[0028] According to one embodiment of the present invention, a first end of the detection circuit is used to connect to the charging connection confirmation terminal of the AC charging port, and a second end of the detection circuit is used to connect to the vehicle ground terminal of the AC charging port; the vehicle further includes: an on-board electronic control unit, which is connected to the charging connection confirmation terminal and the controller respectively, and is used to trigger the controller to control the high-voltage circuit to be in an open state when the detection circuit is determined to be formed according to the charging connection signal transmitted by the charging connection confirmation terminal.

[0029] According to one embodiment of the present invention, the high-voltage circuit includes a battery pack, a switching circuit, and a high-voltage load, wherein the battery pack, the switching circuit, and the high-voltage load are connected in series; wherein the controller is connected to the control terminal of the switching circuit and is used to control the switching circuit to be in an open state when the detection circuit is formed.

[0030] According to one embodiment of the present invention, the switching circuit includes a positive switch and a negative switch. The positive switch is connected between the positive terminal of the battery pack and the high-voltage load, and the negative switch is connected between the negative terminal of the battery pack and the high-voltage load. The controller is connected to the control terminal of the positive switch and / or the control terminal of the negative switch, and is used to control the positive switch and / or the negative switch to be in an open state when the detection circuit is formed.

[0031] Fifthly, the present invention proposes a high-voltage circuit control system, comprising: the detection device described above and the vehicle described above.

[0032] The detection device, vehicle, battery manager, and circuit control method and system of the present invention can easily and conveniently realize the disconnection control of the vehicle's high-voltage circuit.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] Figure 1 This is a structural block diagram of a detection device according to an embodiment of the present invention;

[0035] Figure 2(a) is a schematic diagram of the detection device according to an embodiment of the present invention;

[0036] Figure 2(b) is a structural block diagram of a detection device according to another embodiment of the present invention;

[0037] Figure 3(a) is a schematic diagram of a charging socket according to an embodiment of the present invention;

[0038] Figure 3(b) is a charging connection interface diagram according to an embodiment of the present invention;

[0039] Figure 3(c) is a control guidance circuit diagram according to an embodiment of the present invention;

[0040] Figure 3(d) is a diagram showing the relationship between the connection status of the AC charging port and the resistance value of the RC circuit according to an embodiment of the present invention.

[0041] Figure 4 This is a flowchart of a high-voltage circuit control method according to an embodiment of the present invention;

[0042] Figure 5 This is an architectural diagram of a high-voltage circuit control method according to an embodiment of the present invention;

[0043] Figure 6 This is an architectural diagram of another embodiment of the high-voltage circuit control method of the present invention;

[0044] Figure 7 This is a structural block diagram of the battery manager according to an embodiment of the present invention;

[0045] Figure 8 This is a structural block diagram of a vehicle according to an embodiment of the present invention;

[0046] Figure 9 This is a structural block diagram of the high-voltage circuit control system according to an embodiment of the present invention. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0048] The connectors, vehicle, and high-voltage circuit control methods and systems of the present invention are described below with reference to the accompanying drawings.

[0049] Figure 1 This is a structural block diagram of a detection device according to an embodiment of the present invention.

[0050] like Figure 1 As shown, the detection device 300 includes a detection circuit 320.

[0051] See Figure 1 The detection circuit 320 is used to connect to the AC charging port 450 of the vehicle 400 to form a detection circuit, which is adapted to trigger the vehicle 400 to perform high-voltage circuit disconnection control.

[0052] Specifically, the AC charging port 450 may be provided with multiple connection terminals, such as a charging connection confirmation terminal, a vehicle ground terminal, and a control signal terminal. The detection circuit 320 may be connected to one or more of these connection terminals (e.g., via wires, specific connectors, etc.) to form a detection circuit. When the vehicle 400 detects the formation of the detection circuit (e.g., detects a specific resistance value, a specific voltage, etc.), it can control the high-voltage circuit to disconnect.

[0053] The detection device 300 can be connected to the AC charging port 450 of the vehicle 400 in an emergency, allowing emergency personnel to quickly disconnect the high-voltage circuit 410 of the entire vehicle and avoid safety accidents. Furthermore, by being set up independently of the vehicle 400, it can be applied to different new energy vehicle models (including passenger cars and commercial vehicles), making it widely applicable.

[0054] In some embodiments of the present invention, the detection device 300 is adapted to be inserted into the AC charging port 450 to form a detection circuit.

[0055] Specifically, the detection device 300 may be equipped with a plug, pins, or other structures, which can be inserted into the AC charging port 450 to form a detection circuit.

[0056] In some examples, as shown in Figure 2(a), the detection device 300 may be configured as a connector having a plug 311 that is connected to the detection circuit 320 and adapted to be inserted into the AC charging port 450.

[0057] Referring to Figure 2(a), the connector also includes a body 312, and the detection circuit 320 can be disposed in the body 312. The connector may have two plugs 311, which are disposed on the body and connected to the two ends of the detection circuit 320 respectively, and are adapted to be inserted into the sockets of the two connection terminals of the AC charging port 450. The shape and size of the body 312, as well as the position and length of the plugs 311, can be determined according to the shape and size of the AC charging port 450, and the position and depth of the corresponding two connection terminal sockets.

[0058] In some embodiments of the present invention, the first end of the detection circuit 320 is used to connect to the charging connection confirmation terminal CC of the AC charging port, and the second end of the detection circuit 320 is used to connect to the vehicle ground terminal PE of the AC charging port.

[0059] When the two ends of the detection circuit 320 are connected to the charging connection confirmation terminal CC of the AC charging port and the vehicle ground terminal PE, a detection circuit can be formed.

[0060] Specifically, in some embodiments, as shown in FIG2(b), the detection device 300 further includes a first connector 310, which is connected to a first end of the detection circuit 320 to establish a connection between the first end of the detection circuit 320 and the charging connection confirmation terminal.

[0061] The first end of the detection circuit 320 is connected to the charging connection confirmation terminal CC via the first connector 310, and the second end of the detection circuit 320 is connected to the vehicle ground terminal PE, thus forming a detection circuit. At this time, the vehicle 400 can be triggered to disconnect the high-voltage circuit 410, thereby keeping the high-voltage circuit 410 in a disconnected state (i.e., when the high-voltage circuit 410 is connected, the connection is disconnected; when it is not connected, high voltage is not allowed to be applied, and the disconnected state is maintained).

[0062] Specifically, when it is necessary to urgently disconnect the high-voltage circuit 410 of vehicle 400, the detection circuit 320 of detection device 300 can be connected to the charging connection confirmation terminal CC and the vehicle ground terminal PE of AC charging port 450 (e.g., through the corresponding charging socket socket). Because in the control guidance circuit of new energy vehicle charging standards (such as GB / T 18487.1 and GB / T 20234.3 standards), the charging connection confirmation terminal CC is connected to the vehicle ground terminal PE and / or pull-up power supply of vehicle 400 through the corresponding charging connection confirmation resistor required by the standard, and a detection point is provided at the charging connection confirmation terminal CC, which is connected to the vehicle controller. During charging, the vehicle controller can detect the connection status of the charging connection confirmation terminal CC through the detection point. Therefore, when detection device 300 is connected to the charging connection confirmation terminal CC of vehicle 400, the charging connection confirmation terminal CC is also connected to the vehicle ground terminal PE through detection circuit 320. At this time, the resistance value between the detection point and the vehicle ground terminal PE, or the voltage signal at the detection point, changes, and a detection circuit is formed. Vehicle 400 can determine whether a detection circuit has been formed based on the resistance value or voltage signal. If it has been formed, it indicates that there is a need to disconnect the high-voltage circuit 410 of vehicle 400 in an emergency, that is, to control the high-voltage circuit 410 to disconnect in order to ensure the personal safety of emergency personnel.

[0063] It should be noted that, in order to avoid false detection, i.e., misdetecting the connection of the detection device 300 as the connection of the charging gun, the resistance value of the detection circuit 320 can be set to be different from the charging connection confirmation resistance value required by the charging standard. This will make the detection voltage for determining whether the detection circuit is formed different from the detection voltage for determining whether it is a charging connection.

[0064] In some embodiments, as shown in FIG2(b), the detection device 300 further includes a second connector 330.

[0065] Referring to Figure 2(b), the second connector 330 is connected to the second terminal of the detection circuit 320. The second connector 330 is used to establish a connection between the second terminal of the detection circuit 320 and the vehicle ground terminal PE of the AC charging port 450. When the second connector 330 is connected to the vehicle ground terminal PE, the second terminal of the detection circuit 320 can be grounded.

[0066] Specifically, when in use, the detection device 300 connects the first connector 310 to the charging connection confirmation terminal CC of the vehicle 400 (e.g., through the corresponding charging socket socket) while simultaneously connecting the second connector 320 to the vehicle 400's ground terminal PE (e.g., through the corresponding charging socket socket). The vehicle 400 can determine whether a detection circuit including the detection circuit 320 is formed based on the voltage signal. If it is formed, it indicates a need to urgently disconnect the high-voltage circuit 410 of the vehicle 400, i.e., control the high-voltage circuit 410 to disconnect to ensure the personal safety of emergency personnel.

[0067] In some embodiments, the first connector 310 includes a first plug.

[0068] When the vehicle 400 is equipped with an AC charging socket 420 (as shown in Figure 3(a)), the first plug is adapted to be matched with the socket of the charging connection confirmation terminal CC provided on the AC charging socket 420 (as shown in Figure 3(a)).

[0069] Specifically, in some examples, vehicle 400 can be AC ​​charged according to GB / T 18487.1 and GB / T 20234.2 standards. Its charging connection interface is shown in Figure 3(b), the control guidance circuit is shown in Figure 3(c), the connection status of the AC charging port and the resistance value of the RC circuit are shown in Figure 3(d), and the charging socket 420 corresponding to the AC charging port is shown in Figure 3(a). In this example, the first plug is adapted to fit into the socket of the charging connection confirmation terminal CC on the AC charging socket 420. In use, simply insert the first plug into the socket; operation is convenient. The aforementioned charging connection confirmation resistor includes resistor R4 and RC in Figure 3(c), and the resistance value of the detection circuit 320 can be 50Ω.

[0070] In some embodiments, similar to the first connector 310, the second connector 330 includes a second plug adapted to mate with a socket (as shown in FIG3(a)) of the vehicle ground terminal PE provided on the AC charging socket 420.

[0071] In actual use, for AC charging ports, there is no need to enter the vehicle. Simply open the AC charging socket cover, insert the first plug into the corresponding CC socket, and the second plug into the corresponding PE socket. The operation is convenient.

[0072] In some embodiments, such as Figure 5 , Figure 6 As shown, the detection circuit 320 includes a first resistor R1, the first end of the first resistor R1 is connected to the first connector 310, and the second end of the first resistor R1 is used to connect to the vehicle body ground terminal PE.

[0073] The resistance value of the first resistor R1 is different from the resistance value required by the charging standard for confirming the charging connection.

[0074] In some embodiments, when the detection device 300 is used to disconnect the high-voltage circuit 410 in an emergency, in order to ensure the safety of emergency personnel, the connection between the detection device 300 and the vehicle 400 is only detected when the vehicle speed of the vehicle 400 is less than or equal to a speed threshold such as 5 km / h.

[0075] The detection device 300 of this invention has the following advantages:

[0076] 1) It eliminates the need to install high-voltage or low-voltage maintenance switches on new energy vehicles, reducing the overall vehicle cost;

[0077] 2) When in use, simply insert the detection device 300 into the vehicle 400 and use the existing device on the vehicle 400 (such as the battery manager BMC) to detect the specific resistance value corresponding to the charging connection confirmation terminal CC. The emergency control high voltage circuit 410 is in the disconnected state. The whole process is simple and convenient to operate, which can ensure the safety of maintenance and meet the need to quickly disconnect the high voltage circuit in an emergency.

[0078] 3) Since there are national standards for AC charging ports, the detection device 300 of the present invention can be made into an industry standard by connecting a specific resistor to the charging connection confirmation terminal CC to disconnect the high voltage circuit 410. It can also meet the special needs of firefighters, traffic police and other personnel to quickly disconnect the high voltage circuit in emergency situations.

[0079] Figure 4 This is a flowchart of a high-voltage circuit control method according to an embodiment of the present invention.

[0080] like Figure 4 As shown, the high-voltage circuit control method includes:

[0081] S1, when the vehicle's AC charging port is connected to the detection circuit of the detection device to form a detection circuit, the high-voltage circuit controlling the vehicle is in an open state.

[0082] The detection device is the detection device 300 in the above embodiment.

[0083] Specifically, the high-voltage circuit control method of the present invention can be executed by the vehicle's battery management system (BMC), for example, as... Figure 5 As shown, the BMC can be directly connected to the vehicle's charging connection confirmation terminal, thereby directly obtaining the CC signal from the AC port. Based on the CC signal, the formation of the detection circuit can be determined; when the detection circuit is formed, the high-voltage circuit controlling the vehicle is in an open state. For example, as... Figure 6 As shown, the BMC uses an on-board electronic control unit ( Figure 6The ECU (Electronic Control Unit) is connected to the vehicle's charging connection confirmation terminal. The on-board electronic control unit receives a CC signal from the AC port, which indicates the resistance or voltage at the charging connection confirmation terminal. Based on this resistance or voltage, it determines whether a detection circuit has formed. When a detection circuit is formed, a trigger signal is sent to the BMC (Battery Management Center). The BMC, based on the trigger signal, confirms the formation of the detection circuit and controls the vehicle's high-voltage circuit to remain open. The BMC and the on-board electronic control unit can be connected via a Controller Area Network (CAN) bus.

[0084] This control method connects to the AC charging port via a detection device to keep the vehicle's high-voltage circuit disconnected. It is easy to operate and has a wide range of applications.

[0085] In some embodiments, before the high-voltage circuit controlling the vehicle is disconnected, it is also necessary to determine that the vehicle speed is less than or equal to a speed threshold.

[0086] Specifically, such as Figure 5 , Figure 6 As shown, the BMC is also connected to the vehicle's vehicle control unit (VCU) (e.g., via a CAN bus). Before disconnecting the high-voltage circuit, the BMC obtains the vehicle's speed from the VCU and determines if the speed is less than or equal to a speed threshold, such as 5 km / h. The high-voltage circuit is only disconnected when the speed (e.g., 3 km / h) is less than the speed threshold. By implementing emergency high-voltage shutdown control at lower speeds and maintaining normal high-voltage up-control at higher speeds, passenger safety can be ensured. Alternatively, the speed can be determined to be less than or equal to the speed threshold before the detection circuit is established.

[0087] In some embodiments, when the detection loop is formed, an alarm signal is sent to the vehicle controller to cause the vehicle controller to turn off the high-voltage power-on indicator light and / or lock the vehicle in the parking position.

[0088] Specifically, when the detection circuit is formed, the BMC sends an alarm signal to the VCU (which may include discharge prohibition information). The VCU can control the high-voltage power-on indicator light of the vehicle to turn off (i.e., the indicator light corresponding to the OK position) according to the alarm signal, or lock the vehicle in the parking position (P position) to prevent the vehicle from driving, ensure personnel safety, and avoid accidents.

[0089] In some embodiments, when the detection loop is formed, an alarm signal is sent to the vehicle's instrument panel and / or on-board terminal to cause the instrument panel and / or on-board terminal to issue a high-voltage power-off warning message.

[0090] Specifically, such as Figure 5 , Figure 6 As shown, the BMC also connects to the vehicle's instrument cluster and onboard terminal (e.g., via a CAN bus). When a detection circuit is established, the BMC also sends an alarm signal to the vehicle's instrument cluster and / or onboard terminal, causing the instrument cluster and / or onboard terminal (e.g., via an application APP installed on the onboard terminal) to issue a high-voltage power-off warning message.

[0091] Figure 7 This is a structural block diagram of the battery manager according to an embodiment of the present invention.

[0092] like Figure 7 As shown, the battery manager 500 includes a processor 501 and a memory 503. The processor 501 and the memory 503 are connected, for example, via a bus 502. Optionally, the battery manager 500 may also include a transceiver 504. It should be noted that in practical applications, the transceiver 504 is not limited to one, and the structure of this battery manager 500 does not constitute a limitation on the embodiments of the present invention.

[0093] Processor 501 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in connection with this disclosure. Processor 501 may also be a combination that implements computational functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0094] Bus 502 may include a pathway for transmitting information between the aforementioned components. Bus 502 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. Bus 502 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 7 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0095] The memory 503 stores a computer program corresponding to the high-voltage circuit control method of the above embodiments of the present invention. This computer program is executed by the processor 501. The processor 501 executes the computer program stored in the memory 503 to implement the content shown in the aforementioned method embodiments. Figure 7 The battery manager 500 shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of the present invention.

[0096] Figure 8 This is a structural block diagram of a vehicle according to an embodiment of the present invention.

[0097] like Figure 8 As shown, vehicle 400 includes: AC charging port 450, high voltage circuit 410 and controller 600.

[0098] The controller 600 is connected to the high-voltage circuit 410 and is used to control the high-voltage circuit 410 to be in an open state when the AC charging port 450 is connected to the detection circuit 320 of the detection device 300 to form a detection circuit.

[0099] In some embodiments, the first end of the detection circuit 320 is used to connect to the charging connection confirmation terminal CC of the charging port 450, and the second end of the detection circuit 320 is used to connect to the vehicle ground terminal PE of the charging port 450.

[0100] In this embodiment, such as Figure 5 As shown, the controller 600 (which can be the battery manager 500 mentioned above, or can reuse the vehicle controller in Figure 3(c)) Figure 6 (shown as BMC in the image) is connected to the charging connection confirmation terminal CC, for use in accordance with the charging connection signal transmitted by the charging connection confirmation terminal CC (i.e., Figure 5 The CC signal in the figure can be the voltage of the corresponding detection point (such as the voltage of detection point 3 in Figure 3(c)) to determine the formation of the detection circuit.

[0101] Specifically, the charging connection signal is the detection point voltage corresponding to the charging connection confirmation terminal. The controller 600 is used to: determine that a detection circuit is formed when the detection point voltage is a first preset voltage; wherein, when the charging port is connected to the charging gun, the detection point voltage is a second preset voltage value, and the second preset voltage is different from the first preset voltage.

[0102] It should be noted that the second preset voltage is different from the first preset voltage because the resistance value of the detection circuit 320 is different from the charging connection confirmation resistance value required by the charging standard.

[0103] In other embodiments, vehicle 400 also includes an onboard electronic control unit. For example... Figure 7 As shown, the vehicle electronic control unit ( Figure 6The ECU in the middle is connected to the charging connection confirmation terminal CC and the controller 600 respectively. Figure 6 (shown as BMC) is connected to determine the formation of the detection circuit based on the charging connection signal transmitted by the charging connection confirmation terminal CC. When the detection circuit is formed, the controller 600 is triggered to control the high-voltage circuit 410 to be in the disconnected state, thereby disconnecting the power supply connection between the high-voltage load 413 and the battery pack 411 to ensure safety during emergency maintenance.

[0104] The on-board electronic control unit can reuse the existing electronic control unit in the vehicle 400. In this embodiment, the detection function of the detection circuit is set in the on-board electronic control unit, and the control function of the high-voltage circuit 410 is set in the controller 600. The on-board electronic control unit can communicate with the controller 600 via the CAN bus to transmit a trigger signal that triggers the controller 600 to control the high-voltage circuit 410 to be in an open state. Compared to Figure 6 The scheme that relies solely on the controller 600 for detection and control provides an alternative detection and control solution, increasing the diversity of detection and control.

[0105] Alternatively, the detection and control function can be set on both the controller 600 and the vehicle electronic control unit. In this case, the controller 600 can be used as the main detection and control device, and the vehicle electronic control unit can be used as the backup detection and control device to achieve redundancy and improve the reliability of detection and control.

[0106] In some embodiments, see Figure 5 , Figure 6 The high-voltage circuit 410 includes a battery pack 411, a switching circuit 412, and a high-voltage load 413, which are connected in series.

[0107] The controller 600 is connected to the control terminal of the switching circuit 412 and is used to control the switching circuit 412 to be in the open state when the detection loop is formed. To ensure the power supply stability of the high-voltage load 413, see [reference needed]. Figure 5 , Figure 6 The high-voltage circuit 410 may also include a capacitor C, which is connected in parallel with the high-voltage load 413.

[0108] In some embodiments, the switching circuit 412 includes a positive switch K+ and / or a negative switch K-. Figure 5 , Figure 6 (Taking the example including a positive switch K+ and a negative switch K-, the positive switch K+ is connected between the positive terminal of the battery pack 411 and the high-voltage load 413, and the negative switch K- is connected between the negative terminal of the battery pack 411 and the high-voltage load 413.)

[0109] The controller 600 is connected to the control terminal of the positive switch K+ and / or the control terminal of the negative switch K-. Figure 5 , Figure 6 (Taking the control terminal of the positive switch K+ and the control terminal of the negative switch K- as an example), it is used to control the positive switch K+ and / or the negative switch K- to be in the open state when the detection circuit is formed.

[0110] See Figure 5 , Figure 6 The high-voltage circuit 410 also includes a pre-charging circuit 414, which includes a pre-charging switch K0 and a pre-charging resistor R0 connected in series. The pre-charging switch K0 and the pre-charging resistor R0 are connected in parallel with the positive switch K+. This pre-charging circuit 414 is used for pre-charging when the high-voltage load 413 is powered on, ensuring the safety of high-voltage power-on.

[0111] In an embodiment of the present invention, vehicle 400 is a rechargeable new energy vehicle, equipped with 7 AC charging ports for AC charging.

[0112] Additionally, see Figure 5 , Figure 6 The vehicle 400 may also include an anti-lock braking system (ABS), which can be connected to the CAN bus to communicate with the VCU, BMC, etc., to realize the relevant control of "anti-lock" during braking.

[0113] Figure 9 This is a structural block diagram of the high-voltage circuit control system according to an embodiment of the present invention.

[0114] like Figure 9 As shown, the high-voltage circuit control system 700 includes: the detection device 300 of the above embodiment and the vehicle 400 of the above embodiment.

[0115] In summary, the detection device, vehicle, battery manager, and high-voltage circuit control method and system of the present invention can achieve the disconnection control of the vehicle's high-voltage circuit at low cost, and are simple and convenient to operate with a wide range of applications.

[0116] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0117] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0118] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0119] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0120] Furthermore, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0121] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0122] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0123] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A high-voltage circuit control method, characterized in that, The high-voltage circuit control method is executed by the vehicle's battery manager, and the method includes: When the vehicle's AC charging port is connected to the detection circuit of the detection device to form a detection circuit, the high-voltage circuit of the vehicle is controlled to be disconnected. When the vehicle speed is less than or equal to the vehicle speed threshold and the detection circuit is formed, the high voltage circuit of the vehicle is controlled to be in the open state. The detection circuit includes: the detection circuit is used to connect to the vehicle's AC charging port to form a detection loop, the detection loop being adapted to trigger the vehicle to perform high-voltage circuit disconnection control; The first terminal of the detection circuit is used to connect to the charging connection confirmation terminal of the AC charging port, and the second terminal of the detection circuit is used to connect to the vehicle ground terminal of the AC charging port. The battery manager is directly connected to the charging connection confirmation terminal to obtain the signal from the charging connection confirmation terminal and determine the formation status of the detection circuit based on the signal from the charging connection confirmation terminal; when the detection circuit is formed, the high-voltage circuit of the vehicle is controlled to be in the disconnected state.

2. The high-voltage circuit control method according to claim 1, characterized in that, The detection device further includes: A first connector is connected to a first end of the detection circuit to establish a connection between the first end of the detection circuit and the charging connection confirmation terminal.

3. The high-voltage circuit control method according to claim 2, characterized in that, The detection device further includes: The second connector is connected to the second end of the detection circuit to establish a connection between the second end of the detection circuit and the vehicle body ground terminal.

4. The high-voltage circuit control method according to claim 3, characterized in that, The AC charging port is provided with an AC charging socket, and the first connector includes a first plug, which is adapted to be matched with the socket of the charging connection confirmation terminal provided on the AC charging socket.

5. The high-voltage circuit control method according to claim 4, characterized in that, The second connector includes a second plug adapted to mate with a socket on the vehicle ground terminal provided on the AC charging socket.

6. The high-voltage circuit control method according to claim 1, characterized in that, The detection circuit includes a first resistor, a first end of which is used to connect to the charging connection confirmation terminal, and a second end of which is used to connect to the vehicle body ground terminal.

7. The high-voltage circuit control method according to claim 1, characterized in that, The detection device is adapted to be inserted into the AC charging port to form the detection circuit.

8. The high-voltage circuit control method according to claim 7, characterized in that, The detection device is constructed as a connector, which has a plug that is connected to the detection circuit and is adapted to be inserted into the AC charging port.

9. The high-voltage circuit control method according to any one of claims 1-8, characterized in that, The resistance value of the detection circuit is different from the resistance value required by the charging standard for confirming the charging connection.

10. The high-voltage circuit control method according to claim 1, characterized in that, When the detection loop is formed, the method further includes: Send an alarm signal to the vehicle controller so that the vehicle controller can turn off the high voltage power-on indicator light of the vehicle and / or lock the vehicle in the parking position.

11. The high-voltage circuit control method according to claim 1, characterized in that, When the detection loop is formed, the method further includes: Send an alarm signal to the vehicle's instrument panel and / or on-board terminal to cause the instrument panel and / or on-board terminal to issue a high-voltage power-off warning message.

12. A battery manager, comprising a memory, a processor, and a computer program stored in the memory, characterized in that, When the computer program is executed by the processor, it implements the high-voltage circuit control method as described in any one of claims 1-7 and 9-11.

13. A vehicle, characterized in that, include: AC charging port, high-voltage circuit, controller, and battery manager; The controller is connected to the high-voltage circuit and is used to control the high-voltage circuit of the vehicle to be in an open state when the AC charging port of the vehicle is connected to the detection circuit of the detection device to form a detection circuit. When the vehicle speed is less than or equal to the vehicle speed threshold and the detection circuit is formed, the high voltage circuit of the vehicle is controlled to be in the open state. The first terminal of the detection circuit is used to connect to the charging connection confirmation terminal of the AC charging port, and the second terminal of the detection circuit is used to connect to the vehicle ground terminal of the AC charging port. The battery manager is directly connected to the charging connection confirmation terminal to obtain the signal from the charging connection confirmation terminal and determine the formation status of the detection circuit based on the signal from the charging connection confirmation terminal; when the detection circuit is formed, the high-voltage circuit of the vehicle is controlled to be in the disconnected state.

14. The vehicle according to claim 13, characterized in that, The controller is connected to the charging connection confirmation terminal and is used to determine whether the detection loop is formed based on the charging connection signal transmitted by the charging connection confirmation terminal.

15. The vehicle according to claim 14, characterized in that, The charging connection signal is the detection point voltage corresponding to the charging connection confirmation terminal, and the controller is used for: When the voltage at the detection point is a first preset voltage, it is determined that the detection circuit is formed; When the charging port is connected to the charging gun, the voltage at the detection point is a second preset voltage value, which is different from the first preset voltage.

16. The vehicle according to claim 13, characterized in that, The vehicle also includes an on-board electronic control unit, which is connected to the charging connection confirmation terminal and the controller respectively, and is used to trigger the controller to control the high-voltage circuit to be in a disconnected state when the detection circuit is determined to be formed based on the charging connection signal transmitted by the charging connection confirmation terminal.

17. The vehicle according to claim 13, characterized in that, The high-voltage circuit includes a battery pack, a switching circuit, and a high-voltage load, wherein the battery pack, the switching circuit, and the high-voltage load are connected in series. The controller is connected to the control terminal of the switching circuit and is used to control the switching circuit to be in an open state when the detection loop is formed.

18. The vehicle according to claim 17, characterized in that, The switching circuit includes a positive switch and a negative switch. The positive switch is connected between the positive terminal of the battery pack and the high-voltage load, and the negative switch is connected between the negative terminal of the battery pack and the high-voltage load. The controller is connected to the control terminal of the positive switch and / or the control terminal of the negative switch, and is used to control the positive switch and / or the negative switch to be in an open state when the detection circuit is formed.

19. A high-voltage circuit control system, characterized in that, The high-voltage circuit control method according to any one of claims 1-11 is performed, or the vehicle includes any one of claims 13-18.

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