High voltage power-on detection circuit, method, device, and vehicle
By designing a voltage divider and multi-path sampling structure in the high-voltage power-on detection circuit, the problem of inaccurate voltage acquisition was solved, and the accuracy and safety of high-voltage power-on detection were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DEEPAL AUTOMOBILE TECH CO LTD
- Filing Date
- 2023-05-29
- Publication Date
- 2026-06-09
Smart Images
Figure CN116699381B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of voltage detection technology, specifically to a high-voltage power-on detection circuit, method, device, and vehicle. Background Technology
[0002] With the development of new energy vehicles, power batteries, as the power source for these vehicles, possess the characteristics of large capacity and high voltage, providing powerful performance and meeting the vehicle's range requirements. Power batteries are high-voltage batteries, with voltage levels reaching 800V to 2000V, exceeding the voltage that the human body can withstand. If a power battery malfunctions, it can endanger the safety of occupants and damage vehicle components. Therefore, a BMS (Battery Management System) is needed to monitor the safety of high-voltage power supply to protect occupants and prevent damage to vehicle components.
[0003] In related technologies, to ensure the safety of high-voltage power-on, it is necessary to determine whether the conditions for high-voltage power-on are met, i.e., whether voltage can be collected after the controllable switch is closed. Chinese patent CN109116230A discloses an online monitoring device for the status of a high-voltage relay, which uses a high-voltage relay as a controllable switch. After voltage sampling based on a high-voltage monitoring module, the voltage is transmitted to a microcontroller through a serial communication isolator to determine the current status of the high-voltage relay. However, when the microcontroller or a hard-wired capacitor is connected in series with the circuit, it will interfere with the voltage signal, resulting in inaccurate voltage acquisition. Summary of the Invention
[0004] In view of the shortcomings of the prior art described above, the present invention provides a high-voltage power-on detection circuit, method, device and vehicle to solve at least one of the above-mentioned technical problems.
[0005] In a first aspect, the present invention provides a high-voltage power-on detection circuit, comprising: a voltage output module, a detection control module, and a high-voltage detection module; the voltage output module is used to output to the output terminal of a high-voltage battery module in a vehicle, and to control the switching state of each of the controlled objects according to control instructions generated from the vehicle controller, forming three different sampling paths to detect the first voltage respectively, so as to obtain a main positive voltage, a main negative voltage, and a total voltage, wherein the controlled objects include a first switch, a second switch, and a third switch; the high-voltage detection module is connected to the output terminal of the detection control module, and is used to determine the state of each switch according to the detected main positive voltage, the main negative voltage, and the total voltage to complete the high-voltage power-on detection.
[0006] In one embodiment of the present invention, the voltage output module includes: a high-voltage battery module for providing the input voltage, the input voltage being the potential difference between the positive and negative terminals of the high-voltage battery module, the high-voltage battery module being composed of multiple battery modules, each battery module being composed of multiple battery cells connected in parallel; and a voltage divider module, one end of which is connected to the output terminal of the high-voltage battery module, and the other end of which is connected to the input terminal of the detection and control module, for reducing the input voltage to a preset voltage range through voltage divider resistors to obtain the first voltage, wherein the voltage divider resistors include a first voltage divider resistor, a second voltage divider resistor, and a third voltage divider resistor, one end of the first voltage divider resistor being connected to the positive terminal of the high-voltage battery module, and the other end of which is connected to one end of the second voltage divider resistor, and one end of the third voltage divider resistor being connected to the negative terminal of the high-voltage battery module, and the other end of which is connected to the other end of the second voltage divider resistor.
[0007] In one embodiment of the present invention, the circuit further includes: a power distribution module connected to the output terminal of the high-voltage detection module, used to feed back the status of each switch to the vehicle controller, and distribute the high-voltage power output by the high-voltage battery module to each electrical device.
[0008] In one embodiment of the present invention, the detection control module includes: a first control unit, configured to control the switch state of the second switch to a closed state to form a first sampling path when the controlled object of the control command is the second switch, adjust the first voltage using the second switch, and output the main positive voltage; a second control unit, configured to control the switch state of the third switch to a closed state to form a second sampling path when the controlled object of the control command is the third switch, adjust the first voltage using the third switch, and output the main negative voltage; and a third control unit, configured to control the switch states of the first switch and the second switch to a closed state to form a third sampling path when the controlled object of the control command is both the first switch and the third switch, adjust the first voltage using the first switch and the third switch, and output the total voltage.
[0009] In one embodiment of the present invention, the first sampling path includes a detection control unit, and the first sampling path is a closed loop formed by the high-voltage battery module, the second switch, and the detection control unit connected in series.
[0010] In one embodiment of the present invention, the second sampling path includes the detection control unit, and the second sampling path is a closed loop formed by the high-voltage battery module, the third switch, and the detection control unit connected in series.
[0011] In one embodiment of the present invention, the third sampling path is a closed loop formed by the high-voltage battery module, the first switch, the power distribution module, and the third switch connected in series.
[0012] In a second aspect, the present invention also provides a high-voltage power-on detection method, comprising: acquiring a control command generated by a vehicle controller for a controlled object; dividing the input voltage provided by the high-voltage battery module of the vehicle to output a first voltage; controlling the switching state of each controlled object according to the control command to form three different sampling paths to detect the first voltage respectively, so as to obtain a main positive voltage, a main negative voltage and a total voltage, wherein the controlled object includes a first switch, a second switch and a third switch; and determining the closed state of each switch based on the detected main positive voltage, the main negative voltage and the total voltage to complete the high-voltage power-on detection.
[0013] In a third aspect, the present invention also provides a vehicle device, including a high-voltage power-on detection circuit as described in the above embodiments, or employing a high-voltage power-on detection method as described in the above embodiments.
[0014] In a fourth aspect, the present invention also provides an electronic device, comprising: one or more processors; and a storage device for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the high-voltage power-on detection method as described in the above embodiments.
[0015] The beneficial effects of this invention: This invention proposes a high-voltage power-on detection circuit, method, device, and vehicle. The circuit includes a voltage output module for outputting a first voltage; a detection control module for controlling the switching states of each controlled object according to control commands generated from the vehicle controller, thereby forming three different sampling paths to detect the first voltage, obtaining a main positive voltage, a main negative voltage, and a total voltage. The controlled objects include a first switch, a second switch, and a third switch; and a high-voltage detection module for determining the state of each switch based on the detected main positive voltage, main negative voltage, and total voltage to complete the high-voltage power-on detection. This invention, by controlling the three sampling paths formed by the states of each switch, can separately acquire the main positive voltage, main negative voltage, and total voltage in real time. The circuit structure is simple, the design cost is low, it solves the coupling problem between different sampling paths, and the sampling is not interfered with by devices connected after the power distribution module. It can quickly and accurately sample the voltage, thereby improving the accuracy and reliability of high-voltage power-on detection and ensuring the safety of high-voltage power-on.
[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description
[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:
[0018] Figure 1 This is a schematic diagram illustrating the implementation environment of a high-voltage power-on detection circuit according to an exemplary embodiment of the present invention;
[0019] Figure 2 This is a schematic diagram illustrating the principle of a high-voltage power-on detection circuit according to an exemplary embodiment of the present invention;
[0020] Figure 3 This is a schematic diagram of the structure of the first sampling path shown in an exemplary embodiment of the present invention;
[0021] Figure 4 This is a schematic diagram of the structure of the second sampling path shown in an exemplary embodiment of the present invention;
[0022] Figure 5 This is a flowchart illustrating a high-voltage power-on detection method according to an exemplary embodiment of the present invention;
[0023] Figure 6 This is a schematic diagram illustrating the structure of a computer system suitable for implementing the electronic device of the present invention, as shown in an exemplary embodiment of the present invention. Detailed Implementation
[0024] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.
[0025] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0026] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the invention.
[0027] In the high-voltage power-up process, because high voltage differs from low voltage, directly contacting the high-voltage battery could cause a significant impact, burning out power components and damaging high-voltage parts within the vehicle, posing a risk of high-voltage leakage. Therefore, switches are needed to control the state changes of each switch sequentially, allowing the voltage to rise slowly and ensuring safety during voltage increase. The state of each switch changes based on control commands sent by the VCU (Vehicle Control Unit). After the control command is issued, the switches may not respond immediately, changing their state from open to closed. Therefore, it is necessary to sample the relevant voltages to detect whether the switch states are closed and whether the high-voltage power-up conditions are met, ensuring the safety of high-voltage power-up. However, in related technologies, the detection circuit, when connected in series with the controller at the end of the circuit or with a hard-wired voltage Y capacitor, interferes with the sampling of relevant voltages, resulting in an excessively large difference between the main positive voltage and the main negative voltage, rather than being close to the ideal scenario where the main positive voltage = main negative voltage = half of the total voltage.
[0028] Based on this, the present invention provides a technical solution for a high-voltage power-on detection circuit. Three different sampling circuits are formed according to the control commands generated by the vehicle controller in the vehicle to complete the accurate sampling of voltage, so as to detect the status of each switch, ensure that each switch is ready and meets the high-voltage power-on conditions, and thus ensure the safety of high-voltage power-on.
[0029] Please see Figure 1 The diagram below illustrates an implementation environment of a high-voltage power-on detection circuit, as shown in an exemplary embodiment of the present invention.
[0030] Reference Figure 1As shown, the implementation environment includes a vehicle 101 and a high-voltage power-on detection circuit 102, which is embedded within the vehicle 101. The vehicle 101 is an electric vehicle powered by a battery. The high-voltage power-on detection circuit 101 is used to perform high-voltage power-on detection on the vehicle 101 to determine if the vehicle 101 meets the conditions for high-voltage power-on. Each switch in the high-voltage power-on detection circuit 102 responds to control commands sent by the control unit within the vehicle 101, controlling the changes in the switch states and forming three different sampling paths. These paths can sample the main positive voltage, main negative voltage, and total voltage respectively, thereby detecting the state of each switch and determining whether the high-voltage power-on conditions are met. Because the accuracy of obtaining the main positive voltage, main negative voltage, and total voltage is high, the accuracy of high-voltage power-on detection is high, thus ensuring the safety of high-voltage power-on.
[0031] Please see Figure 2 This is a schematic diagram illustrating the principle of a high-voltage power-on detection circuit, as shown in an exemplary embodiment of the present invention. This circuit can be applied to... Figure 1 The circuit is illustrated in the implementation environment shown and is specifically configured in vehicle 101. This circuit can also be applied to other exemplary implementation environments and specifically configured in other devices; this embodiment does not limit the implementation environment to which the circuit is applicable.
[0032] like Figure 2 As shown, this exemplary high-voltage power-on detection circuit includes: a voltage output module, a detection control module, a high-voltage detection module, and a power distribution module, detailed below:
[0033] The voltage output module is used to divide the input voltage provided by the high-voltage battery module on the vehicle and output the first voltage;
[0034] The voltage output module also includes:
[0035] The high-voltage battery module is used to provide input voltage, which is the potential difference between the positive and negative terminals of the high-voltage battery module. The high-voltage battery module consists of multiple battery modules, and each battery module consists of multiple battery cells connected in parallel.
[0036] Specifically, a battery cell is the smallest unit that constitutes a battery, consisting of a positive electrode, a negative electrode, and an organic electrolyte. Assembling these battery cells into a high-voltage battery module, i.e., constructing a power battery assembly, provides support, fixation, and protection for the battery cells. The high-voltage battery module can be a lithium iron phosphate battery, a lithium cobalt oxide battery, a ternary lithium battery, etc., and this embodiment does not limit this to any particular type.
[0037] The voltage divider module is connected to the output terminal of the high-voltage battery module at one end and to the input terminal of the detection and control module at the other end. It reduces the input voltage to a preset voltage range through the voltage divider resistors to obtain the first voltage. The voltage divider resistors include a first voltage divider resistor, a second voltage divider resistor, and a third voltage divider resistor. One end of the first voltage divider resistor is connected to the positive terminal of the high-voltage battery module, and the other end is connected to one end of the second voltage divider resistor. One end of the third voltage divider resistor is connected to the negative terminal of the high-voltage battery module, and the other end is connected to the other end of the second voltage divider resistor.
[0038] Specifically, such as Figure 2 As shown, the voltage divider resistors include a first voltage divider resistor R1, a second voltage divider resistor R2, and a third voltage divider resistor R3. These three resistors reduce the input voltage provided by the high-voltage battery module to a voltage range recognizable by the sampling path, i.e., a preset voltage range, typically between 3V and 8V. R1, R2, and R3 are the numbers of the voltage divider resistors; each numbered resistor can be composed of multiple resistors connected in series and parallel, or it can be a single resistor. This voltage divider method improves the sampling range and accuracy of the high-voltage battery.
[0039] The detection and control module is connected to the output terminal of the voltage output module. It is used to control the switching state of each controlled object according to the control instructions generated by the vehicle controller. It forms three different sampling paths to detect the first voltage to obtain the main positive voltage, the main negative voltage and the total voltage. The controlled objects include the first switch, the second switch and the third switch.
[0040] Typically, the controllable switch is controlled by the vehicle controller or hybrid power controller to switch on and off high voltage. Therefore, the control command controls the controllable switch, such as... Figure 2 As shown, the controllable switch includes a first switch S1, a second switch S2, and a third switch S3, used to switch between three different sampling paths to detect the first voltage, obtain the main positive voltage, the main negative voltage, and the total voltage, and avoid wire burnout when the current is large, which is beneficial to the safety of vehicle internal components. The controllable switch may include relays or electronic switches, etc., and this invention does not limit this to such devices.
[0041] In one embodiment of the present invention, after the vehicle is started, a low voltage is applied first. After the switching states of the second switch S2 and the third switch S3 are successfully detected, a high voltage is applied, and the switching state of the first switch S1 is detected. The detection order of the second switch S2 and the third switch S3 is not limited.
[0042] In one embodiment of the present invention, the first switch S1 is a main positive relay, the second switch S2 is a pre-charge relay, and the third switch S3 is a main negative relay. If the main positive relay is closed directly after the main negative relay is closed, the instantaneous current of the high-voltage power-on detection circuit will be very large, causing the main positive relay to stick and fail. Therefore, it is necessary to close the second switch S2 first and then close the first switch S1 to prevent the first switch S1 from burning out due to excessive current at the moment the high-voltage circuit is turned on. The process of controlling the switching states of the second switch S3 and the third switch S3 to be closed can be called the power-on process. The successful closure of the second switch S3 and the third switch S3 allows the detection of the first switch to continue.
[0043] Specifically, the detection control module also includes:
[0044] The first control unit is used to control the second switch to a closed state when the control command controls the second switch, forming a first sampling path, and using the second switch to adjust the first voltage and output the main positive voltage.
[0045] Please see Figure 3 The diagram below is a schematic representation of the structure of the first sampling path, which is an exemplary embodiment of the present invention.
[0046] like Figure 3 As shown, after closing the second switch S2, a first sampling path is formed. The high-voltage battery module, the second switch S2, and the detection control unit form a closed loop connected in series, and voltage sampling is performed on this closed loop to obtain the main positive voltage. At this time, the current flow is: positive terminal of the high-voltage battery module → second switch S2 → P2+ → detection control unit → P2- → negative terminal of the high-voltage battery module. Among them, P2+ and P2- are the positive and negative terminal harnesses of P2, which are used to connect the detection control unit in series in the first sampling path so as to collect the main positive voltage through the detection control unit and detect the switching state of the second switch S2. For example, if the value of the main positive voltage is 0, the switching state of the second switch S2 is open, and the detection will stop.
[0047] The second control unit is used to control the switch state of the third switch to the closed state when the control command controls the third switch, forming a second sampling path, and using the third switch to adjust the first voltage and output the main negative voltage.
[0048] Please see Figure 4 The diagram below is a schematic representation of the structure of the second sampling path, which is an exemplary embodiment of the present invention.
[0049] like Figure 4As shown, after closing the third switch S3, a first sampling path is formed, which is a closed loop formed by the high-voltage battery module, the third switch S3, and the detection control unit connected in series. Voltage sampling is performed on this closed loop to obtain the main positive voltage. At this time, the current flow is: positive terminal of the high-voltage battery module → P1+ → detection controller → P1- → third switch S3 → negative terminal of the high-voltage battery module. Among them, P1+ and P1- are the positive and negative terminal harnesses of P1, which are used to connect the detection control unit in series in the second sampling path so as to collect the main negative voltage through the detection control unit and detect the switching state of the third switch S3. For example, if the value of the main negative voltage is 0, the switching state of the third switch S3 is open, and the detection will stop.
[0050] The third control unit is used to control the switching states of the first and second switches to the closed state when the control command controls the first and third switches, forming a third sampling path, and adjusting the first voltage using the first and third switches to output the total voltage.
[0051] like Figure 2 As shown, after closing the first switch S1 and the third switch S3, a third sampling path is formed, which is a closed loop formed by the high-voltage battery module, the third switch S3, and the detection control unit connected in series. Voltage sampling is performed on this closed loop to obtain the main positive voltage. At this time, the current flow direction, i.e., the voltage from high to low, is: positive terminal of the high-voltage battery module → first switch S1 → power distribution module → third switch S3 → negative terminal of the high-voltage battery module. The total voltage is collected by the detection control unit and used to detect the switching state of the first switch S1 when the third switch is closed. For example, if the total voltage value is 0, the switching state of the third switch S3 is open, and detection will stop. It should be understood that, in cases such as... Figure 2 In the third sampling path shown, the total voltage is detected and controlled by the control unit. By simultaneously collecting data from the positive and negative wire harnesses of P1 and P2, the sum of the main negative voltage and the main positive voltage is obtained, so as to approximate the actual total voltage flowing through the power distribution module in the third sampling voltage path.
[0052] The circuit structure of the first, second, and third sampling paths formed by the above method is simple and has low design cost. Each sampling path is independent of the others and there is no coupling problem. It can quickly and accurately sample the voltage and independently detect the state of each switch, so as to make the high-voltage power-on detection highly accurate and ensure the safety of high-voltage power-on.
[0053] The high-voltage detection module is connected to the output of the detection control module. It is used to determine the status of each switch based on the detected main positive voltage, main negative voltage and total voltage to complete the high-voltage power-on detection.
[0054] Specifically, the high-voltage detection module includes P1 positive and negative wiring harnesses, P2 positive and negative wiring harnesses, and a detection control unit. The detection unit collects the main positive voltage, main negative voltage, and total voltage, and determines the status of the corresponding switch based on the value of each voltage. For example, if any voltage value is 0, meaning no voltage was collected, the corresponding switch is not in the closed state, the control command response is unsuccessful, the high-voltage power-on detection needs to be stopped, and the switch needs to be effectively handled to prevent high-voltage leakage, which could damage vehicle internal components and cause a safety accident.
[0055] The power distribution module, connected to the output of the high-voltage detection module, is used to feed back the status of each switch to the vehicle controller and distribute the high-voltage power output from the high-voltage battery module to each electrical device.
[0056] In one embodiment of the present invention, the power distribution module acquires the voltage values and detects the status of each switch in real time from the detection control unit and feeds them back to the vehicle controller. Due to the high real-time feedback, when high voltage is applied, the vehicle controller can notify each electrical device to activate its working state, preventing safety issues caused by high voltage transmission to electrical devices when the devices are not operating, thus improving the safety of high-voltage power supply.
[0057] The high-voltage power-on detection circuit constructed in the above manner can sample the relevant voltage in real time without being interfered with by the devices connected to the power distribution module. This makes the voltage sampling result closer to the ideal scenario where the main positive voltage = main negative voltage = half of the total voltage. The voltage detection accuracy is high, which improves the accuracy of high-voltage power-on detection and thus ensures the safety of high-voltage power-on.
[0058] Please see Figure 5 The above is a flowchart illustrating a high-voltage power-on detection method as an exemplary embodiment of the present invention. This method can be applied to... Figure 1 The implementation environment is shown, and is specifically executed by vehicle 101 in that implementation environment. It should be understood that the method can also be applied to other exemplary implementation environments, and this embodiment does not limit the implementation environment to which the method is applicable.
[0059] like Figure 5 As shown, in an exemplary embodiment, the high-voltage power-on detection method includes at least steps S510 to S540, which are detailed below:
[0060] Step S510: Obtain control instructions for the controlled object generated by the vehicle controller on the vehicle;
[0061] Step S520: Divide the input voltage provided by the high-voltage battery module on the vehicle to output the first voltage;
[0062] Step S530: Control the switching state of each controlled object according to the control command to form three different sampling paths to detect the first voltage respectively, so as to obtain the main positive voltage, the main negative voltage and the total voltage. The controlled objects include the first switch, the second switch and the third switch.
[0063] Step S540: Based on the detected main positive voltage, main negative voltage and total voltage, determine the closing state of each switch to complete the high voltage power-on detection.
[0064] It should be noted that the high-voltage power-on detection method provided in the above embodiments and the high-voltage power-on detection circuit provided in the above embodiments belong to the same concept. The specific way of performing each step has been described in detail in the circuit embodiments, and will not be repeated here.
[0065] Embodiments of the present invention also provide a vehicle device, the vehicle including the high-voltage power-on detection circuit provided in the above embodiments, or using the high-voltage power-on detection method provided in the above embodiments.
[0066] Embodiments of the present invention also provide an electronic device, including: one or more processors; and a storage device for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the electronic device enables the high-voltage power-on detection method provided in the above embodiments.
[0067] Please see Figure 6 A schematic diagram of a computer system suitable for implementing embodiments of the present invention is shown. It should be noted that... Figure 6 The computer system 600 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of the present invention.
[0068] like Figure 6 As shown, the computer system 600 includes a Central Processing Unit (CPU) 601, which can perform various appropriate actions and processes, such as executing the methods described in the above embodiments, based on programs stored in Read-Only Memory (ROM) 602 or programs loaded from Storage Unit 608 into Random Access Memory (RAM) 603. The RAM 603 also stores various programs and data required for system operation. The CPU 601, ROM 602, and RAM 603 are interconnected via a bus 704. An Input / Output (I / O) interface 605 is also connected to the bus 604.
[0069] The following components are connected to I / O interface 605: an input section 606 including a keyboard, mouse, etc.; an output section 607 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to I / O interface 605 as needed. A removable medium 611, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 610 as needed so that computer programs read from it can be installed into storage section 608 as needed.
[0070] In particular, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing computer programs for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 609, and / or installed from removable medium 611. When the computer program is executed by central processing unit (CPU) 601, it performs various functions defined in the system of the present invention.
[0071] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present invention. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.
[0072] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.
Claims
1. A high-voltage power-on detection circuit, characterized in that, The circuit includes: a voltage output module, a detection and control module, and a high voltage detection module; The voltage output module is used to divide the input voltage provided by the high-voltage battery module on the vehicle and output a first voltage; The detection and control module is connected to the output terminal of the voltage output module. It controls the switching states of each controlled object according to control commands generated from the vehicle controller, forming three different sampling paths to detect the first voltage, thereby obtaining a main positive voltage, a main negative voltage, and a total voltage. The controlled objects include a first switch, a second switch, and a third switch. Specifically, the first control unit controls the second switch to a closed state when the controlled object of the control command is the second switch, forming a first sampling path, and adjusts the first voltage using the second switch to output the main positive voltage. The second control unit controls the third switch to a closed state when the controlled object of the control command is the third switch, forming a second sampling path, and adjusts the first voltage using the third switch to output the main negative voltage. The third control unit controls both the first and third switches to a closed state when the controlled object of the control command is both the first and third switches, forming a third sampling path, and adjusts the first voltage using the first and third switches to output the total voltage. The first switch is a main positive relay, the second switch is a pre-charge relay, and the third switch is a main negative relay. The high-voltage detection module is connected to the output terminal of the detection control module and is used to determine the state of each switch based on the detected main positive voltage, main negative voltage and total voltage to complete the high-voltage power-on detection.
2. The high-voltage power-on detection circuit as described in claim 1, characterized in that, The voltage output module includes: A high-voltage battery module is used to provide the input voltage, which is the potential difference between the positive and negative terminals of the high-voltage battery module. The high-voltage battery module is composed of multiple battery modules, and each battery module is composed of multiple battery cells connected in parallel. A voltage divider module is connected at one end to the output terminal of the high-voltage battery module and at the other end to the input terminal of the detection and control module. It reduces the input voltage to a preset voltage range through voltage divider resistors to obtain the first voltage. The voltage divider resistors include a first voltage divider resistor, a second voltage divider resistor, and a third voltage divider resistor. One end of the first voltage divider resistor is connected to the positive terminal of the high-voltage battery module, and the other end is connected to one end of the second voltage divider resistor. One end of the third voltage divider resistor is connected to the negative terminal of the high-voltage battery module, and the other end is connected to the other end of the second voltage divider resistor.
3. The high-voltage power-on detection circuit as described in claim 2, characterized in that, The circuit also includes: The power distribution module is connected to the output terminal of the high-voltage detection module and is used to feed back the status of each switch to the vehicle controller and distribute the high-voltage power output by the high-voltage battery module to each electrical device.
4. The high-voltage power-on detection circuit as described in claim 1, characterized in that, The first sampling path includes a detection control unit, which is a closed loop formed by the high-voltage battery module, the second switch, and the detection control unit connected in series.
5. The high-voltage power-on detection circuit as described in claim 1, characterized in that, The second sampling path includes a detection control unit, which is a closed loop formed by the high-voltage battery module, the third switch, and the detection control unit connected in series.
6. The high-voltage power-on detection circuit as described in claim 3, characterized in that, The third sampling path is a closed loop formed by the high-voltage battery module, the first switch, the power distribution module, and the third switch connected in series.
7. A high-voltage energization detection method, characterized in that, include: Obtain control commands for controlled objects generated by the vehicle controller on the vehicle. The input voltage provided by the high-voltage battery module on the vehicle is divided to output the first voltage; The control commands control the switching states of each controlled object to form three different sampling paths to detect the first voltage, thereby obtaining the main positive voltage, the main negative voltage, and the total voltage. The controlled objects include a first switch, a second switch, and a third switch. Specifically, a first control unit is used to control the second switch to a closed state when the controlled object of the control command is the second switch, forming a first sampling path, and using the second switch to adjust the first voltage to output the main positive voltage. A second control unit is used to control the third switch to a closed state when the controlled object of the control command is the third switch, forming a second sampling path, and using the third switch to adjust the first voltage to output the main negative voltage. A third control unit is used to control the first and third switches to a closed state when the controlled objects of the control command are both the first and third switches, forming a third sampling path, and using the first and third switches to adjust the first voltage to output the total voltage. The first switch is a main positive relay, the second switch is a pre-charge relay, and the third switch is a main negative relay. Based on the detected main positive voltage, main negative voltage, and total voltage, the closing state of each switch is determined to complete the high-voltage power-on detection.
8. A vehicle device, characterized in that, The vehicle includes a high-voltage power-on detection circuit as described in any one of claims 1 to 6, or employs a high-voltage power-on detection method as described in claim 7.
9. An electronic device, characterized in that, include: One or more processors; A storage device for storing one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the high-voltage power-on detection method as described in claim 7.