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

Abstract

The invention discloses a detection device, a vehicle, a battery manager and a loop control method and system.The detection device comprises a detection circuit, the detection circuit is used for being connected with a charging port of the vehicle to form a detection loop, and the detection loop is suitable for triggering the vehicle to conduct disconnection control over a high-voltage loop. The detection device can simply and conveniently enable the high-voltage loop of the vehicle to be in a disconnected state.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular, to a detection device, a vehicle, a battery manager, and a circuit control method and system. Background Art

[0002] Currently, the mainstream maintenance & emergency disconnection of high-voltage solutions for new energy vehicle manufacturers generally have two solutions: a high-voltage maintenance switch and a low-voltage maintenance switch. The high-voltage maintenance switch solution is generally used for commercial vehicles. In this solution, a physical switch for disconnecting the high-voltage circuit is added to the high-voltage circuit; the low-voltage maintenance switch is generally used for passenger vehicles. In this solution, the battery manager (Battery Management Controller, BMC) or other controllers collect the status of the low-voltage maintenance switch, and when it is detected that the low-voltage maintenance switch is disconnected, an operation to disconnect the high voltage is performed. However, the above two solutions have the following defects:

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

[0004] (2) Limited by the structure of the passenger vehicle battery pack and the overall vehicle waterproof requirements, etc., the high-voltage maintenance switch solution is not applicable to passenger vehicles;

[0005] (3) The switch positions involved in the two solutions vary depending on vehicle manufacturers, vehicle models, etc. When a new energy vehicle safety accident occurs, it is not convenient for firefighters, traffic police, etc. to perform the operation of emergency disconnection of high voltage. Summary of the Invention

[0006] The present invention aims to at least solve one of the technical problems in the related art to some extent. For this purpose, the object of the present invention is to provide a detection device, a vehicle, a battery manager, and a circuit control method and system to simply and conveniently keep the high-voltage circuit of the vehicle in a disconnected state.

[0007] In a first aspect, the present invention provides a detection device, including: a detection circuit, the detection circuit is used to connect to the charging port of the vehicle to form a detection circuit, and the detection circuit is adapted to trigger the vehicle to perform disconnection control of the high-voltage circuit.

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

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

[0010] According to an embodiment of the present invention, the detection device further includes: a first connector, connected to the 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 an embodiment of the present invention, the detection device further includes: a second connector, connected to the 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 an embodiment of the present invention, the first connector includes a first plug. When the charging port is provided with an AC charging socket, the first plug is adapted to be mated with the jack of the charging connection confirmation terminal provided on the AC charging socket; when the charging port is provided with a DC charging socket, the first plug is adapted to be mated with the jack of the second charging connection confirmation terminal provided on the DC charging socket, wherein the second charging connection confirmation terminal is the charging connection confirmation terminal connecting the vehicle controller of the vehicle.

[0013] According to an embodiment of the present invention, the second connector includes a second plug, and the second plug is adapted to be mated with the jack of the vehicle body ground terminal provided on the charging socket, wherein the charging port is provided with the charging socket, and the charging socket includes a DC charging socket and / or an AC charging socket.

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

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

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

[0017] According to an 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] In a second aspect, the present invention proposes a high-voltage circuit control method, including: when the charging port of the vehicle is connected to the detection circuit of the above detection device to form a detection loop, 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 embodiment of the present invention may further have the following additional technical features:

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

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

[0022] According to an embodiment of the present invention, when the detection circuit is formed, the method further includes: sending an alarm signal to the vehicle's instrument and / or in-vehicle terminal, so that the instrument and / or the in-vehicle terminal issues a high-voltage power-off prompt message.

[0023] In a third aspect, the present invention provides a battery management unit, including a memory, a processor, and a computer program stored on the memory. When the computer program is executed by the processor, the above-mentioned high-voltage circuit control method is implemented.

[0024] In a fourth aspect, the present invention provides a vehicle, including: a charging port, a high-voltage circuit, and a controller; wherein, the controller is connected to the high-voltage circuit and is configured to control the high-voltage circuit to be in an open state when the charging port is connected to the detection circuit of the above-mentioned detection device to form a detection circuit.

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

[0026] According to an embodiment of the present invention, the first end of the detection circuit is used to connect the charging connection confirmation terminal of the charging port, and the second end of the detection circuit is used to connect the body ground terminal of the charging port; wherein, the controller is connected to the charging connection confirmation terminal and is configured to determine whether the detection circuit is formed according to the charging connection signal transmitted by the charging connection confirmation terminal.

[0027] According to an 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 configured to: when the detection point voltage is a first preset voltage, determine that the detection circuit is formed; 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 an embodiment of the present invention, the first end of the detection circuit is used to connect to the charging connection confirmation terminal of the charging port, and the second end of the detection circuit is used to connect to the vehicle body ground terminal of the charging port; the vehicle further includes: an in-vehicle electronic control unit, which is respectively connected to the charging connection confirmation terminal and the controller, and is used to trigger the controller to control the high-voltage circuit to be in an open state when it is determined that the detection loop is formed according to the charging connection signal transmitted by the charging connection confirmation terminal.

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

[0030] According to an embodiment of the present invention, the switching circuit includes a positive switch and a negative switch. The positive switch is connected between the positive electrode of the battery pack and the high-voltage load, and the negative switch is connected between the negative electrode of the battery pack and the high-voltage load; wherein, the controller is connected to the control end of the positive switch and / or the control end 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 loop is formed.

[0031] In a fifth aspect, the present invention proposes a high-voltage circuit control system, including: the above-mentioned detection device and the above-mentioned vehicle.

[0032] The detection device, vehicle, battery manager, loop control method, and system according to the embodiments of the present invention can simply and conveniently realize the disconnection control of the vehicle high-voltage circuit through the detection device.

[0033] Additional aspects and advantages of the present invention will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

[0040] Figure 3(d) is the relationship diagram between the connection state of the AC charging port and the resistance value of RC in an embodiment of the present invention;

[0041] Figure 4(a) is the schematic diagram of the charging socket of another embodiment of the present invention;

[0042] Figure 4(b) is the charging connection interface diagram of another embodiment of the present invention;

[0043] Figure 4(c) is the control and guidance circuit diagram of another embodiment of the present invention;

[0044] Figure 4(d) is the parameter diagram of the control and guidance circuit of another embodiment of the present invention;

[0045] Figure 5 is the flowchart of the high-voltage circuit control method of an embodiment of the present invention;

[0046] Figure 6 is the architecture diagram for implementing the high-voltage circuit control method of an embodiment of the present invention;

[0047] Figure 7 is the architecture diagram for implementing the high-voltage circuit control method of another embodiment of the present invention;

[0048] Figure 8 is the structural block diagram of the battery manager of an embodiment of the present invention;

[0049] Figure 9 is the structural block diagram of the vehicle of an embodiment of the present invention;

[0050] Figure 10 is the structural block diagram of the high-voltage circuit control system of an embodiment of the present invention. Detailed Embodiments

[0051] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where 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 by referring to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0052] The following describes the plug-in connectors, vehicles, and high-voltage circuit control methods and systems of the embodiments of the present invention with reference to the accompanying drawings.

[0053] Figure 1 is the structural block diagram of the detection device of an embodiment of the present invention.

[0054] As Figure 1 shown, the detection device 300 includes: a detection circuit 320.

[0055] See Figure 1 , the detection circuit 320 is used to connect to the charging port 450 of the vehicle 400 to form a detection loop, and the detection loop is adapted to trigger the vehicle 400 to perform disconnection control of the high-voltage loop.

[0056] Specifically, the charging port 450 may be provided with a plurality of connection terminals, such as a charging connection confirmation terminal, a body ground terminal, a control signal terminal, etc. The detection circuit 320 may be connected to one or more of the connection terminals (such as connected by wires, specific connectors, etc.) to form a detection loop. When the vehicle 400 detects the formation of the detection loop (such as detecting a specific resistance value, a specific voltage, etc.), it can control the disconnection of the high-voltage loop.

[0057] The detection device 300 can be connected to the charging port 450 of the vehicle 400 in an emergency, facilitating emergency personnel to quickly disconnect the high-voltage loop of the entire vehicle 410 and avoid safety accidents; and by being independently arranged from the vehicle 400, it can be applicable to different new energy vehicle models (including passenger vehicles and commercial vehicles), with a wide range of applications.

[0058] In some embodiments of the present invention, the detection device 300 is adapted to be inserted into the charging port 450 to form a detection loop.

[0059] Specifically, the detection device 300 may be provided with structures such as plugs and pins, and can be inserted into the charging port 450 through the plugs and pins to form a detection loop.

[0060] In some examples, as shown in Fig. 2(a), the detection device 300 may be configured as a connector. The connector has a plug 311, and the plug 311 is connected to the detection circuit 320 and is adapted to be inserted into the charging port 450.

[0061] See Fig. 2(a). The connector further includes a body 312, and the detection circuit 320 may be disposed in the body 312. The connector may have two plugs 311, and the two plugs 311 are disposed on the body and are respectively connected to both ends of the detection circuit 320, and are adapted to be inserted into the jacks of the two connection terminals of the charging port 450. Among them, the shape and size of the body 312, as well as the position and length of the plug 311, etc., can be determined according to the shape and size of the charging port 450, as well as the position and depth of the corresponding two connection terminal jacks.

[0062] 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 charging port, and the second end of the detection circuit 320 is used to connect to the body ground terminal PE of the charging port.

[0063] Among them, when both ends of the detection circuit 320 are respectively connected to the charging connection confirmation terminal CC and the body ground terminal PE of the charging port, a detection loop can be formed.

[0064] Specifically, in some embodiments, as shown in FIG. 2(b), the detection device 300 further includes a first connector 310, and the first connector 310 is connected to the first end of the detection circuit 320 for establishing a connection between the first end of the detection circuit 320 and the charging connection confirmation terminal.

[0065] Among them, the first end of the detection circuit 320 is connected to the charging connection confirmation terminal CC through the first connector 310. After the second end of the detection circuit 320 is connected to the vehicle body ground terminal PE, a detection loop can be formed. At this time, the vehicle 400 can be triggered to perform the disconnection control of the high-voltage loop 410, so that the high-voltage loop 410 is in a disconnected state (that is, when the high-voltage loop 410 is connected, the connection is disconnected; when it is not connected, the high voltage is not allowed to be applied, and the disconnected state is maintained).

[0066] Specifically, when it is necessary to urgently disconnect the high-voltage loop 410 of the vehicle 400, the detection circuit 320 of the detection device 300 can be connected to the charging connection confirmation terminal CC of the charging port 450 and the vehicle body ground terminal PE (such as through the jacks of the corresponding charging socket). In the control pilot circuit of the new energy vehicle charging standard (such as the GB / T 18487.1 standard and the GB / T 20234.3 standard), the charging connection confirmation terminal CC is connected to the vehicle body ground terminal PE and / or the pull-up power supply of the 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, and this detection point is connected to the vehicle controller. During charging, the vehicle controller can detect the connection state of the charging connection confirmation terminal CC through the detection point. Therefore, when the detection device 300 is connected to the charging connection confirmation terminal CC of the vehicle 400, the charging connection confirmation terminal CC is also connected to the vehicle body ground terminal PE through the detection circuit 320. At this time, the resistance value between the detection point and the vehicle body ground terminal PE, or the voltage signal at the detection point changes, and the detection loop is formed. The vehicle 400 can judge whether the detection loop is formed according to the resistance value or the voltage signal. If it is formed, it indicates that there is a need to urgently disconnect the high-voltage loop 410 of the vehicle 400, that is, to control the high-voltage loop 410 to be disconnected to ensure the personal safety of emergency personnel.

[0067] It should be noted that to avoid false detection, that is, 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, so that the detection voltage for determining whether the detection loop is formed is different from the detection voltage for determining whether it is a charging connection.

[0068] In some embodiments, as shown in FIG. 2(b), the detection device 300 further includes: a second connector 330.

[0069] Referring to FIG. 2(b), the second connector 330 is connected to the second end of the detection circuit 320. The second connector 330 is used to establish a connection between the second end of the detection circuit 320 and the vehicle body ground terminal PE of the charging port 450. Among them, when the second connector 330 is connected to the vehicle body ground terminal PE, the second end of the detection circuit 320 can be grounded.

[0070] Specifically, when the detection device 300 is in use, while connecting the first connector 310 to the charging connection confirmation terminal CC of the vehicle 400 (such as through the jack of the corresponding charging socket), the second connector 320 is connected to the vehicle body ground terminal PE of the vehicle 400 (such as through the jack of the corresponding charging socket). The vehicle 400 can judge whether the detection loop including the detection circuit 320 is formed according to the voltage signal. If it is formed, it indicates that there is a need to urgently disconnect the high-voltage loop 410 of the vehicle 400, that is, to control the high-voltage loop 410 to disconnect to ensure the personal safety of emergency personnel.

[0071] In some embodiments, the first connector 310 includes a first plug.

[0072] Among them, when the vehicle 400 is equipped with an AC charging socket 420 (as shown in FIG. 3(a)), the first plug is adapted to be mated with the jack of the charging connection confirmation terminal CC provided on the AC charging socket 420 (as shown in FIG. 3(a)); when the vehicle 400 is equipped with a DC charging socket 430 (as shown in FIG. 4(a)), the first plug is adapted to be mated with the jack of the second charging connection confirmation terminal CC2 provided on the DC charging socket 430 (as shown in FIG. 4(a)), where the second charging connection confirmation terminal CC2 is the charging connection confirmation terminal connecting the vehicle controller of the vehicle 400.

[0073] Specifically, in some examples, the vehicle 400 can perform AC charging according to the GB / T 18487.1 standard and the GB / T 20234.2 standard. Its charging connection interface is shown in FIG. 3(b), the control pilot circuit is shown in FIG. 3(c), the connection state of the AC charging port and the resistance value of RC are shown in FIG. 3(d), and the corresponding charging socket 420 of the AC charging port is shown in FIG. 3(a). In this example, the first plug is adapted to be mated with the jack of the charging connection confirmation terminal CC provided on the AC charging socket 420. In use, just insert the first plug into the jack, which is convenient to operate. Among them, the above-mentioned charging connection confirmation resistors include the resistor R4 and RC in FIG. 3(c), and the resistance value of the detection circuit 320 can be 50Ω at this time.

[0074] In some examples, the vehicle 400 can be charged directly with direct current according to the standards of GB / T 18487.1 and GB / T 20234.2. Its charging connection interface is shown in Fig. 4(b), the control pilot circuit is shown in Fig. 4(c), the parameters of the control pilot circuit are shown in Fig. 4(d), and the charging socket 430 corresponding to the direct current charging port is shown in Fig. 4(a). In this example, the first plug is adapted to fit into the jack of the second charging connection confirmation terminal CC2 provided on the direct current charging socket 430. When in use, simply insert the first plug into the jack, which is convenient to operate. Among them, the above-mentioned charging connection confirmation resistors include resistors R3 and R5 in Fig. 4(c), and the resistance value of the detection circuit 320 can be 500Ω at this time.

[0075] It should be noted that the vehicle 400 can be provided with only the alternating current charging socket 420, or only the direct current charging socket 430, or both the alternating current charging socket 420 and the direct current charging socket 430. However, the above detection device 300 is applicable to any charging method.

[0076] In some embodiments, the vehicle 400 is provided with a charging socket. Similar to the first connector 310, the second connector 330 includes a second plug, and the second plug is adapted to fit into the jack of the body ground terminal PE provided on the charging socket (such as the above-mentioned alternating current charging socket 420 and direct current charging socket 430) (as shown in Fig. 3(a) and Fig. 4(a)).

[0077] In actual use, for the alternating current charging port, there is no need to enter the vehicle. Just open the cover of the alternating current charging socket, insert the first plug into the corresponding CC jack, and insert the second plug into the corresponding PE jack, which is convenient to operate. Similarly, for the direct current charging port, there is no need to enter the vehicle. Just open the cover of the direct current charging socket, insert the second plug into the corresponding CC2 jack, and insert the second plug into the corresponding PE jack, which is convenient to operate.

[0078] In some embodiments, such as Figure 6 , Figure 7 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 body ground terminal PE.

[0079] Among them, the resistance value of the first resistor R1 is different from the charging connection confirmation resistance value required by the charging standard.

[0080] In some embodiments, when using the detection device 300 to emergency disconnect the high-voltage circuit 410, to ensure the safety of emergency personnel, it is necessary to detect the connection situation between the detection device 300 and the vehicle 400 only when the vehicle speed of the vehicle 400 is less than or equal to the vehicle speed threshold, such as 5 km / h.

[0081] The detection device 300 according to the embodiment of the present invention has the following advantages:

[0082] 1) It is not necessary to set a high-voltage maintenance switch or a low-voltage maintenance switch on a new energy vehicle, reducing the overall vehicle cost;

[0083] 2) When in use, only need to insert the detection device 300 into the vehicle 400, and detect a specific resistance value corresponding to the charging connection confirmation terminal CC through an existing device (such as a battery management controller BMC) on the vehicle 400, and urgently control the high-voltage circuit 410 to be in an open state. The whole process is simple and convenient to operate, which can ensure the safety of maintenance and meet the requirement of quickly disconnecting the high-voltage circuit in an emergency;

[0084] 3) Since the AC and DC charging ports are regulated by national standards, the detection device 300 of the present invention can form an industry standard by accessing a specific resistance to the charging connection confirmation terminal CC to disconnect the control function of the high-voltage circuit 410, and can meet the special requirements of firefighters, traffic police and other personnel to quickly disconnect the high-voltage circuit in an emergency.

[0085] Figure 5 is a flowchart of a high-voltage circuit control method according to an embodiment of the present invention.

[0086] As Figure 5 shown, the high-voltage circuit control method includes:

[0087] S1, when the charging port of the vehicle is connected to the detection circuit of the detection device to form a detection circuit, control the high-voltage circuit of the vehicle to be in an open state.

[0088] Wherein, the detection device is the detection device 300 in the above embodiment.

[0089] Specifically, the high-voltage circuit control method of the present invention can be executed by the battery management controller BMC of the vehicle. For example, as Figure 6 shown, the BMC can be directly connected to the charging connection confirmation terminal of the vehicle, so that the CC signal can be directly obtained from the AC port or the CC2 signal can be obtained from the DC port, and the formation of the detection circuit can be determined according to the CC signal or the CC2 signal; when the detection circuit is formed, control the high-voltage circuit of the vehicle to be in an open state. Another example is, as Figure 7 shown, the BMC passes through a vehicle-mounted electronic control unit ( Figure 7The on-vehicle electronic control unit (ECU*) is connected to the charging connection confirmation terminal of the vehicle. The on-vehicle electronic control unit can obtain the CC signal from the AC port or the CC2 signal from the DC port, that is, obtain the resistance value or voltage at the charging connection confirmation terminal, and determine the formation of the detection circuit according to the resistance value or voltage. When the detection circuit is formed, a trigger signal is sent to the BMC. The BMC can determine the formation of the detection circuit according to the trigger signal, and then control the high-voltage circuit of the vehicle to be in the off state. Among them, the BMC and the on-vehicle electronic control unit can be connected through a Controller Area Network (CAN) bus.

[0090] This control method realizes controlling the high-voltage circuit of the vehicle to be in the off state by connecting the detection device to the charging port, which is convenient to operate and has a wide application range.

[0091] In some embodiments, before controlling the high-voltage circuit of the vehicle to be in the off state, it is also necessary to determine that the vehicle speed is less than or equal to the vehicle speed threshold.

[0092] Specifically, as Figure 6 、 Figure 7 shown, the BMC is also connected to the Vehicle Control Unit (VCU) of the vehicle (such as through a CAN bus). Before controlling the high-voltage circuit of the vehicle to be in the off state, the BMC also obtains the vehicle speed from the VCU and determines whether the vehicle speed is less than or equal to the vehicle speed threshold, such as 5 km / h. When the vehicle speed (such as 3 km / h) is less than the vehicle speed threshold, the disconnection control of the high-voltage circuit is performed. By performing emergency high-voltage power-off control when the vehicle speed is low and maintaining normal high-voltage power-on control when the vehicle speed is high, the safety of personnel can be ensured. Of course, it is also possible to determine that the vehicle speed is less than or equal to the vehicle speed threshold before detecting the formation of the detection circuit.

[0093] In some embodiments, when the detection circuit is formed, an alarm signal is sent to the vehicle's vehicle control unit, so that the vehicle control unit controls the high-voltage power-on indicator of the vehicle to go out and / or locks the vehicle in the parking gear.

[0094] Specifically, when the detection circuit is formed, the BMC sends an alarm signal (which may include information indicating that discharging is not allowed) to the VCU. The VCU can control the high-voltage power-on indicator of the vehicle to go out (that is, the indicator corresponding to the OK gear) according to the alarm signal, or lock the vehicle in the parking gear (P gear) to prohibit the vehicle from driving, ensuring the safety of personnel and avoiding accidents.

[0095] In some embodiments, when the detection circuit is formed, an alarm signal is sent to the vehicle's instrument and / or in-vehicle terminal, so that the instrument and / or in-vehicle terminal issues a high-voltage power-off prompt message.

[0096] Specifically, as Figure 6, Figure 7 As shown, the BMC is also connected to the vehicle instrument and in-vehicle terminal (e.g., connected via the CAN bus). When the detection loop is formed, the BMC also sends an alarm signal to the vehicle instrument and / or in-vehicle terminal, so that the instrument and / or in-vehicle terminal (e.g., via the application APP installed on the in-vehicle terminal) issues a high-voltage power-off prompt message.

[0097] Figure 8 It is a structural block diagram of the battery manager according to an embodiment of the present invention.

[0098] As Figure 8 shown, the battery manager 500 includes: a processor 501 and a memory 503. Among them, the processor 501 and the memory 503 are connected, e.g., connected via a bus 502. Optionally, the battery manager 500 may further include a transceiver 504. It should be noted that in actual applications, the transceiver 504 is not limited to one, and the structure of the battery manager 500 does not constitute a limitation to the embodiments of the present invention.

[0099] The processor 501 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logic blocks, modules, and circuits described in connection with the disclosure of the present invention. The processor 501 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0100] The bus 502 may include a path for transmitting information between the above components. The bus 502 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus 502 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 8 only a thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0101] The memory 503 is used to store a computer program corresponding to the high-voltage circuit control method in the foregoing embodiments of the present invention, and the computer program is controlled and executed by the processor 501. The processor 501 is used to execute the computer program stored in the memory 503 to implement the content shown in the foregoing method embodiments. Figure 8 The shown battery manager 500 is merely an example and should not impose any limitation on the functions and application scope of the embodiments of the present invention.

[0102] Figure 9 It is a structural block diagram of a vehicle according to an embodiment of the present invention.

[0103] As Figure 9 shown, the vehicle 400 includes: a charging port 450, a high-voltage circuit 410, and a controller 600.

[0104] Wherein, 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 charging port 450 is connected to the detection circuit 320 of the detection device 300 to form a detection loop.

[0105] 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 body ground terminal PE of the charging port 450.

[0106] In this embodiment, as Figure 6 shown, the controller 600 (which may be the above-mentioned battery manager 500 or the vehicle controller in FIGS. 3(c) and 4(c) can also be reused, Figure 6 shown as BMC) is connected to the charging connection confirmation terminal CC and is used to determine the formation situation of the detection loop according to the charging connection signal transmitted by the charging connection confirmation terminal CC (i.e., Figure 6 the CC signal and CC2 signal in, which may be the voltage at the corresponding detection point, such as the voltage at detection point 3 in FIG. 3(c) and the voltage at detection point 2 in FIG. 4(c)).

[0107] Specifically, the charging connection signal is the voltage at the detection point corresponding to the charging connection confirmation terminal, and the controller 600 is used to: when the voltage at the detection point is the first preset voltage, determine that the detection loop is formed; wherein, when the charging port is connected to the charging gun, the voltage at the detection point is the second preset voltage value, and the second preset voltage is different from the first preset voltage.

[0108] 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.

[0109] In other embodiments, the vehicle 400 further includes an in-vehicle electronic control unit. As Figure 7 shown, the in-vehicle electronic control unit (Figure 7 in the ECU) are respectively connected to the charging connection confirmation terminal CC and the controller 600 ( Figure 7 shown as BMC in), and are used to determine the formation situation of the detection circuit according to the charging connection signal transmitted by the charging connection confirmation terminal CC, and when the detection circuit is formed, trigger the controller 600 to control the high-voltage circuit 410 to be in an open state, so as to disconnect the power supply connection between the high-voltage load 413 and the battery pack 411, thereby ensuring safety during emergency repairs.

[0110] Among them, the in-vehicle electronic control unit can reuse the existing electronic control units of the vehicle 400. In this embodiment, the detection function of the detection circuit is set in the in-vehicle electronic control unit, and the control function of the high-voltage circuit 410 is set in the controller 600, and the in-vehicle electronic control unit can communicate with the controller 600 through the CAN bus to transmit a trigger signal for triggering the controller 600 to control the high-voltage circuit 410 to be in an open state. Compared with Figure 6 the solution in which only the controller 600 detects and controls, another detection and control solution is provided, increasing the diversity of detection and control.

[0111] Optionally, the detection and control function can also be set both on the controller 600 and on the in-vehicle electronic control unit. At this time, the controller 600 can be used as the main detection and control device, and the in-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.

[0112] In some embodiments, referring to Figure 6 、 Figure 7 , the high-voltage circuit 410 includes a battery pack 411, a switch circuit 412, and a high-voltage load 413, and the battery pack 411, the switch circuit 412, and the high-voltage load 413 are connected in series.

[0113] Among them, the controller 600 is connected to the control end of the switch circuit 412 and is used to control the switch circuit 412 to be in an open state when the detection circuit is formed. To ensure the power supply stability of the high-voltage load 413, referring to Figure 6 、 Figure 7 , the high-voltage circuit 410 may further include a capacitor C, and the capacitor C is connected in parallel with the high-voltage load 413.

[0114] In some embodiments, the switch circuit 412 includes a positive electrode switch K+ and / or a negative electrode switch K- ( Figure 6 、 Figure 7 shown as an example including a positive electrode switch K+ and a negative electrode switch K- in), the positive electrode switch K+ is connected between the positive electrode of the battery pack 411 and the high-voltage load 413, and the negative electrode switch K- is connected between the negative electrode of the battery pack 411 and the high-voltage load 413.

[0115] Among them, the controller 600 is connected to the control terminal of the positive electrode switch K+ and / or the control terminal of the negative electrode switch K- ( Figure 6 、 Figure 7 taking the connection of the control terminal of the positive electrode switch K+ and the control terminal of the negative electrode switch K- as an example), and is used to control the positive electrode switch K+ and / or the negative electrode switch K- to be in an open state when the detection circuit is formed.

[0116] Refer to Figure 6 、 Figure 7 , the high-voltage circuit 410 further includes a pre-charge circuit 414. The pre-charge circuit 414 includes a pre-charge switch K0 and a pre-charge resistor R0 connected in series. After the pre-charge switch K0 and the pre-charge resistor R0 are connected in series, they are connected in parallel with the positive electrode switch K+. This pre-charge circuit 414 is used for pre-charging when the high-voltage load 413 is powered on to ensure the safety of high-voltage power-on.

[0117] In an embodiment of the present invention, the vehicle 400 is a rechargeable new energy vehicle, which may be provided with an AC charging socket (also called an AC port) for AC charging, or may be provided with a DC charging socket (also called a DC port) for DC charging, or may be provided with both an AC charging socket and a DC charging socket to enable both AC charging and DC charging.

[0118] In addition, refer to Figure 6 、 Figure 7 , the vehicle 400 may further include an Antilock Brake System (ABS). The ABS can be connected to the CAN bus to communicate with the VCU, BMC, etc. to implement the related control of "antilock" during braking.

[0119] Figure 10 is the structural block diagram of the high-voltage circuit control system of the embodiment of the present invention.

[0120] As Figure 10 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.

[0121] In summary, the detection device, vehicle, battery manager, and high-voltage circuit control method and system of the embodiments of the present invention can realize the disconnection control of the vehicle high-voltage circuit at low cost, and the operation is simple and convenient, and the applicable range is wide.

[0122] 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 definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or in combination with these instruction execution systems, apparatuses, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in combination with an instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or otherwise processing as appropriate, and then stored in a computer memory.

[0123] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or combinations thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0124] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0125] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0126] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0127] In the present invention, unless otherwise clearly specified and defined, the terms such as "mounted", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0128] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0129] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations to the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A detection device, characterized in that, it includes: a detection circuit, which is used to connect to the charging port of the vehicle to form a detection loop, and the detection loop is adapted to trigger the vehicle to perform disconnection control of the high-voltage loop.

2. The detection device according to claim 1, characterized in that, the first end of the detection circuit is used to connect to the charging connection confirmation terminal of the charging port, and the second end of the detection circuit is used to connect to the body ground terminal of the charging port.

3. The detection device according to claim 2, characterized in that, the detection device further includes: a first connector, connected to the first end of the detection circuit, for establishing a connection between the first end of the detection circuit and the charging connection confirmation terminal.

4. The detection device according to claim 2, characterized in that, the detection device further includes: a second connector, connected to the second end of the detection circuit, for establishing a connection between the second end of the detection circuit and the body ground terminal.

5. The detection device according to claim 3, characterized in that, the first connector includes a first plug, wherein, when the charging port is provided with an AC charging socket, the first plug is adapted to be mated with the jack of the charging connection confirmation terminal provided on the AC charging socket; when the charging port is provided with a DC charging socket, the first plug is adapted to be mated with the jack of the second charging connection confirmation terminal provided on the DC charging socket, wherein the second charging connection confirmation terminal is the charging connection confirmation terminal connecting to the vehicle controller of the vehicle.

6. The detection device according to claim 4, characterized in that, the second connector includes a second plug, and the second plug is adapted to be mated with the jack of the body ground terminal provided on the charging socket, wherein the charging port is provided with the charging socket, and the charging socket includes a DC charging socket and / or an AC charging socket.

7. The detection device according to claim 2, characterized in that, the detection circuit includes a first resistor, the first end of the first resistor is used to connect to the charging connection confirmation terminal, and the second end of the first resistor is used to connect to the body ground terminal.

8. The detection device according to claim 1, characterized in that, the detection device is adapted to be inserted into the charging port to form the detection loop.

9. The detection device according to claim 1, characterized in that, the detection device is configured as a connector, the connector has a plug, and the plug is connected to the detection circuit and is adapted to be inserted into the charging port.

10. The detection device according to any one of claims 1-9, characterized in that, the resistance value of the detection circuit is different from the charging connection confirmation resistance value required by the charging standard.

11. A high-voltage loop control method, characterized in that, it includes: when the charging port of the vehicle is connected to the detection circuit of the detection device according to any one of claims 1-10 to form a detection loop, controlling the high-voltage loop of the vehicle to be in a disconnected state.

12. The high-voltage loop control method according to claim 11, characterized in that, the method further includes: When the vehicle speed is less than or equal to the vehicle speed threshold and the detection circuit is formed, control the high-voltage circuit of the vehicle to be in an open state.

13. The high-voltage circuit control method according to claim 11, wherein, when the detection circuit is formed, the method further includes: sending an alarm signal to the vehicle's vehicle control unit to cause the vehicle control unit to control the high-voltage power-on indicator of the vehicle to turn off and / or lock the vehicle in the parking gear.

14. The high-voltage circuit control method according to claim 11, wherein, when the detection circuit is formed, the method further includes: sending an alarm signal to the vehicle's instrument and / or in-vehicle terminal to cause the instrument and / or the in-vehicle terminal to issue a high-voltage power-off prompt message.

15. A battery management unit, comprising a memory, a processor, and a computer program stored on the memory, wherein, when the computer program is executed by the processor, it implements the high-voltage circuit control method according to any one of claims 11-14.

16. A vehicle, wherein, comprising: a charging port, a high-voltage circuit, and a controller; wherein, the controller is connected to the high-voltage circuit and is configured to control the high-voltage circuit to be in an open state when the charging port is connected to the detection circuit of the detection device according to any one of claims 1-10 to form a detection circuit.

17. The vehicle according to claim 16, wherein, the first end of the detection circuit is used to connect to the charging connection confirmation terminal of the charging port, and the second end of the detection circuit is used to connect to the body ground terminal of the charging port; wherein, the controller is connected to the charging connection confirmation terminal and is configured to determine whether the detection circuit is formed according to the charging connection signal transmitted by the charging connection confirmation terminal.

18. The vehicle according to claim 17, wherein, the charging connection signal is the detection point voltage corresponding to the charging connection confirmation terminal, and the controller is configured 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.

19. The vehicle according to claim 16, wherein, the first end of the detection circuit is used to connect to the charging connection confirmation terminal of the charging port, and the second end of the detection circuit is used to connect to the body ground terminal of the charging port; the vehicle further includes: an in-vehicle electronic control unit, which is respectively connected to the charging connection confirmation terminal and the controller, and is configured to trigger the controller to control the high-voltage circuit to be in an open state when it is determined that the detection circuit is formed according to the charging connection signal transmitted by the charging connection confirmation terminal.

20. The vehicle according to claim 16, wherein, the high-voltage circuit includes a battery pack, a switching circuit, and a high-voltage load, and the battery pack, the switching circuit, and the high-voltage load are connected in series; Wherein, the controller is connected to the control end of the switch circuit and is configured to control the switch circuit to be in an off state when the detection loop is formed.

21. The vehicle according to claim 20, wherein, the switch circuit includes a positive switch and a negative switch. The positive switch is connected between the positive electrode of the battery pack and the high-voltage load, and the negative switch is connected between the negative electrode of the battery pack and the high-voltage load; wherein, the controller is connected to the control end of the positive switch and / or the control end of the negative switch, and is configured to control the positive switch and / or the negative switch to be in an off state when the detection loop is formed.

22. A high-voltage circuit control system, wherein, it includes: the detection device according to any one of claims 1-10 and the vehicle according to any one of claims 16-21.

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