Power control circuit, method and vehicle

Abstract

This application discloses a power control circuit, method, and vehicle, relating to the field of power control technology. The disclosed power control circuit includes: a control chip; a power protection unit, with its first terminal connected to an external power source and its third terminal connected to the first terminal of the control chip; an isolation feedback unit, with its first terminal connected to the fourth terminal of the power protection unit and its second terminal connected to the second terminal of the control chip, used to collect power information from the power protection unit; and a power drive unit, with its first terminal connected to the second terminal of the power protection unit, its second terminal connected to a power supply device, and its third terminal connected to the third terminal of the control chip. The control chip is used to determine power control commands based on the power information and to control the power drive unit based on the power control commands to achieve power control. This application improves the accuracy of power control.

Description

Technical Field

[0001] This application relates to the field of power control technology, and in particular to a power control circuit, method, and vehicle. Background Technology

[0002] As vehicles become more widespread, their power control systems are also evolving and being updated, while users are placing higher demands on these systems.

[0003] Traditional power control circuits supply power directly to the vehicle from an external power source for normal operation. However, this type of power control circuit has a significant drawback: because the external power source supplies power directly to the vehicle, there is a risk of supplying power without proper diagnostics. In other words, this type of power control circuit supplies power directly without diagnosing the external power source (which carries risks such as overvoltage and undervoltage), resulting in low accuracy in power control.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main objective of this application is to provide a power control circuit, method, and vehicle, which aims to solve the technical problem of low accuracy in power control.

[0006] To achieve the above objectives, this application provides a power control circuit, the power control circuit comprising:

[0007] Control chip;

[0008] A power protection unit, wherein the first end of the power protection unit is connected to an external power source, and the third end of the power protection unit is connected to the first end of the control chip;

[0009] An isolation feedback unit is provided, wherein a first end of the isolation feedback unit is connected to a fourth end of the power protection unit, and a second end of the isolation feedback unit is connected to a second end of the control chip. The isolation feedback unit is used to collect power information from the power protection unit.

[0010] A power drive unit is provided, wherein a first terminal of the power drive unit is connected to a second terminal of the power protection unit, a second terminal of the power drive unit is connected to a power supply device, and a third terminal of the power drive unit is connected to a third terminal of the control chip. The control chip is used to determine a power control command based on the power information and to control the power drive unit based on the power control command to achieve power control.

[0011] In one embodiment, the first terminal of the control chip includes a first control terminal and a second control terminal, and the power protection unit includes an input relay control subunit and an output relay control subunit. The first terminal of the input relay control subunit is connected to the first terminal of the output relay control subunit, the second terminal of the input relay control subunit is connected to the external power supply, the third terminal of the input relay control subunit is connected to the first control terminal, the second terminal of the output relay control subunit is connected to the first terminal of the power drive unit, and the third terminal of the output relay control subunit is connected to the second control terminal.

[0012] The input relay control subunit and the output relay control subunit are both composed of a level control circuit and a relay. The input terminal of the level control circuit is connected to the first control terminal or the second control terminal, and the output terminal of the level control circuit is connected to the control terminal of the relay. The first terminal of the relay is connected to the first terminal of other relays. The second terminal of the relay in the input relay control subunit is connected to the external power supply, and the second terminal of the relay in the output relay control subunit is connected to the first terminal of the power drive unit.

[0013] In one embodiment, the isolation feedback unit includes:

[0014] An isolation acquisition chip, the input terminal of which is connected to the fourth terminal of the power protection unit;

[0015] An operational amplifier, wherein the first input terminal of the operational amplifier is connected to the first output terminal of the isolation acquisition chip, the second input terminal of the operational amplifier is connected to the second output terminal of the isolation acquisition chip, and the output terminal of the operational amplifier is connected to the second terminal of the control chip;

[0016] The fourth terminal of the power protection unit includes either the first terminal or the second terminal of the power protection unit.

[0017] In one embodiment, the third terminal of the control chip includes a first driving terminal, a second driving terminal, a first output terminal, and a second output terminal. The power drive unit includes multiple drive control subunits and output subunits. The drive control subunits include a first drive control subunit, a second drive control subunit, and a third drive control subunit. The first output terminal is connected to the first input terminal of the output subunit, the second output terminal is connected to the second input terminal of the output subunit, and the output terminal of the output subunit is connected to the power supply device. The first terminal of the first drive control subunit is connected to the second terminal of the power protection unit. The second terminal of the first drive control subunit is connected to the first driving terminal. The third terminal of the first drive control subunit is connected to the first output terminal. The first terminal of the second drive control subunit is connected to the first output terminal, and the second terminal of the second drive control subunit is connected to the second driving terminal. The third terminal of the second drive control subunit is connected to the third terminal of the third drive control subunit and then grounded. The first terminal of the third drive control subunit is connected to the first output terminal. The drive control subunit includes:

[0018] The input circuit, wherein the input terminal of the input circuit serves as the second terminal of the drive control subunit;

[0019] A drive switch transistor is provided, wherein the first end of the drive switch transistor serves as the first end of the drive control subunit, the second end of the drive switch transistor serves as the third end of the drive control subunit, and the third end of the drive switch transistor is connected to the output end of the input circuit.

[0020] In one embodiment, the power control circuit includes an isolated power supply unit, the isolated power supply unit comprising:

[0021] A power supply diode, wherein the anode of the power supply diode is connected to the external power source;

[0022] An isolated power supply chip is provided, wherein the input terminal of the isolated power supply chip is connected to the cathode of the power supply diode, and the output terminal of the isolated power supply chip is connected to the power supply terminal of the control chip.

[0023] In one embodiment, the power control circuit includes a communication unit, the communication unit comprising:

[0024] A communication transceiver chip, wherein the input terminal of the communication transceiver chip is connected to the communication terminal of the control chip, and the output terminal of the communication transceiver chip is connected to an external communication terminal.

[0025] Furthermore, to achieve the above objectives, this application also provides a power control method, which is applied to the aforementioned power control circuit, and the power control method includes:

[0026] Obtain the power information of the power protection unit and determine the power control command based on the power information;

[0027] The power drive unit is controlled according to the power control command to achieve power control.

[0028] In one embodiment, the power information includes voltage and current values, and the step of determining the power control command based on the power information includes:

[0029] When the voltage value meets a preset voltage threshold and the current value meets a preset current threshold, a drive enable signal is generated.

[0030] The power supply status of the power supply device is obtained under the control of the drive enable signal, and the power supply status is stored in the power control command.

[0031] In one embodiment, the step of controlling the power drive unit according to the power control command includes:

[0032] Determine the power supply status in the power control command, and determine the target duty cycle corresponding to the power supply status in the preset duty cycle correspondence table;

[0033] The drive switch in the power drive unit is driven and controlled based on the target duty cycle.

[0034] In addition, to achieve the above objectives, this application also provides a vehicle, which includes the aforementioned power control circuit;

[0035] The vehicle is used to execute the power control method described above.

[0036] This application provides a power control circuit, including a control chip; a power protection unit, the first terminal of which is connected to an external power source, and the third terminal of which is connected to the first terminal of the control chip; an isolation feedback unit, the first terminal of which is connected to the fourth terminal of the power protection unit, and the second terminal of which is connected to the second terminal of the control chip, the isolation feedback unit being used to collect power information from the power protection unit; and a power drive unit, the first terminal of which is connected to the second terminal of the power protection unit, the second terminal of which is connected to a power supply device, and the third terminal of which is connected to the third terminal of the control chip. The control chip is used to determine a power control command based on the power information, and to control the power drive unit based on the power control command, thereby achieving power control. By collecting power information from the power protection unit through the isolation feedback unit, the power control command is determined based on the power information (based on the power information to determine whether there are risks such as overvoltage or undervoltage), and then the power drive unit is controlled based on the power control command. This avoids the phenomenon of directly supplying power without diagnosing the external power source. This power control circuit determines the power control command by judging the power information, and then controls the power drive unit based on the power control command. This can avoid the risk of directly supplying power in the case of overvoltage or undervoltage, thereby improving the accuracy of power control. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the framework of the first embodiment of the power control circuit of this application;

[0038] Figure 2 This is a schematic diagram of the circuit connection of the power protection unit in the power control circuit of this application;

[0039] Figure 3 This is a schematic diagram of the circuit connection of the isolation feedback unit in the power control circuit of this application;

[0040] Figure 4 This is a schematic diagram of the circuit connection of the power drive unit in the power control circuit of this application;

[0041] Figure 5 This is a schematic diagram of the circuit connection of the isolated power supply unit in the power control circuit of this application;

[0042] Figure 6 This is a schematic diagram of the circuit connection of the communication unit in the power control circuit of this application;

[0043] Figure 7 This is a waveform diagram of current control in the power supply control circuit of this application;

[0044] Figure 8 This is a flowchart illustrating the first embodiment of the power control method of this application;

[0045] Figure 9 This is a schematic diagram of the control chip module in the power control circuit of this application;

[0046] Figure 10 This is a schematic diagram of the hardware operating environment involved in the device in this application.

[0047] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0048] Description of Figure Numbers:

[0049] 10. Control chip; 20. Isolation feedback unit; 30. Power protection unit; 40. Power drive unit; 200 (VIN), external power supply; 300. Power supply device; 33. Internal connection circuit; 32. Output relay control subunit; 31. Input relay control subunit; 311. Level control circuit in the input relay control subunit; 321. First level control circuit in the output relay control subunit; 322. Second level control circuit in the output relay control subunit; X1. First control terminal; X21. (First) second control terminal; X22. (Second) second control terminal; K1. Relay in the input relay control subunit; K2. First relay in the output relay control subunit; K3. Second relay in the output relay control subunit; Z1-Z7. First suppression diode - seventh suppression diode; C1-C19. First capacitor - nineteenth capacitor; R1-R29. First resistor - twenty-ninth resistor; D1-D10. First diode - Tenth diode; D, diode; M1-M3, first drive switch - third drive switch; L1, inductor; Q1-Q3, first transistor - third transistor; Y, operational amplifier; X3 (X31), second terminal of the control chip; U1, isolation acquisition chip; 41, first drive control subunit; V+, positive output terminal; V-, negative output terminal; 411, input circuit in the first drive control subunit; 42, second drive control subunit; 421, input circuit in the second drive control subunit; 43, third drive control subunit; 431, input circuit in the third drive control subunit; SW, first output terminal; HGATE, first drive terminal; LGATE, second drive terminal; BST, step-up / step-down pin; VCC, second output terminal; XVCC, power supply terminal of the control chip; U2, isolation power supply chip; D, power supply diode; DZ, Zener diode; U3, communication transceiver chip; LX, coil; RX, first communication terminal of the control chip; TX, second communication terminal of the control chip. Detailed Implementation

[0050] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0051] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0052] The current vehicle power supply method directly uses an external power source to power the vehicle. However, the system does not consider whether the external power source meets the vehicle's operating requirements during the entire power supply process. This means that even if there are overvoltage or undervoltage issues, the system will still supply power to the vehicle normally, which will cause the internal components to malfunction. For example, overvoltage may damage the components, and undervoltage may prevent them from functioning properly. In other words, because there is no detection of overvoltage, undervoltage, overcurrent, etc., the overall power supply control is ineffective (i.e., the power control lacks diagnostic functions, resulting in low accuracy and poor power supply control performance).

[0053] Therefore, based on the shortcomings of the above power control circuits, the power control circuit of this application is proposed. The main solution of the embodiments of this application is: to collect power information from the power protection unit through an isolation feedback unit, and to determine the power control command based on the power information (based on the power information to determine whether there are risks such as overvoltage or undervoltage). Then, the power drive unit is controlled based on the power control command, thereby avoiding the phenomenon of directly supplying power without diagnosing the external power supply. This power control circuit determines the power control command by judging the power information, and then controls the power drive unit based on the power control command, which can avoid the risk of directly supplying power in the case of overvoltage or undervoltage, thereby improving the accuracy of power control.

[0054] Based on this, the embodiments of this application provide a power control circuit, referring to... Figure 1 , Figure 1 This is a schematic diagram of the framework of the first embodiment of the power control circuit of this application.

[0055] Reference Figure 1 This application provides a power control circuit, the power control circuit comprising:

[0056] Control chip 10;

[0057] The power protection unit 30 has its first end connected to the external power supply 200 and its third end connected to the first end of the control chip 10.

[0058] The isolation feedback unit 20 has its first end connected to the fourth end of the power protection unit 30 and its second end connected to the second end of the control chip 10. The isolation feedback unit 20 is used to collect power information from the power protection unit 30.

[0059] The power drive unit 40 has a first end connected to the second end of the power protection unit 30, a second end connected to the power supply device 300, and a third end connected to the third end of the control chip 10. The control chip 10 is used to determine the power control command based on the power information and control the power drive unit 40 based on the power control command to achieve power control.

[0060] In this embodiment, the power control circuit consists of a control chip 10, a power protection unit 30, an isolation feedback unit 20, and a power drive unit 40. The control chip 10 can be a microcontroller or an MCU. The unit (microcontroller unit) mainly diagnoses the collected information (mainly the current and voltage information of the external power supply 200), and then controls the output of the power drive unit 40 based on the diagnostic results to supply power to the power supply device 300. The power protection unit 30 mainly controls the external power supply 200 to connect to power supply or disconnect and shut down based on the diagnostic results. If the diagnostic results show that the current and voltage parameters of the external power supply 200 are normal, the power protection unit 30 is controlled to connect to the external power supply 200 to supply power; otherwise, the external power supply 200 is disconnected. The isolation feedback unit 20 is used to isolate the voltage and current values ​​of the external power supply 200 or the current and voltage values ​​output by the power protection unit 30 as power information. Its acquisition method can be the commonly used acquisition method of parameters such as current, voltage or power, which is not limited here. The power drive unit 40 refers to the unit that drives the power supply based on the diagnostic results. For example, when the power protection unit 30 is connected to the external power supply 200, it will control the internal devices based on the real-time power supply situation, such as controlling the charging current and voltage, to ensure the accuracy of charging control. It is worth noting that the control chip 10 determines the power control command based on the power information and controls the power drive unit 40 based on the power control command. The power control command can be a command to start powering the power supply device 300, or it can be a command to obtain the charging or power supply requirements of the power supply device 300. After powering starts, it can adaptively control based on the charging or power supply requirements. Thus, the accuracy of power control can be ensured by controlling the start of powering and the power supply process.

[0061] In this embodiment, the power control circuit includes a control chip; a power protection unit, the first terminal of which is connected to an external power source, and the third terminal of which is connected to the first terminal of the control chip; an isolation feedback unit, the first terminal of which is connected to the fourth terminal of the power protection unit, and the second terminal of which is connected to the second terminal of the control chip, the isolation feedback unit being used to collect power information from the power protection unit; and a power drive unit, the first terminal of which is connected to the second terminal of the power protection unit, the second terminal of which is connected to a power supply device, and the third terminal of which is connected to the third terminal of the control chip. The control chip is used to determine a power control command based on the power information, and to control the power drive unit based on the power control command, thereby achieving power control. By collecting power information from the power protection unit through the isolation feedback unit, the power control command is determined based on the power information (based on the power information to determine whether there are risks such as overvoltage or undervoltage), and then the power drive unit is controlled based on the power control command. This avoids the phenomenon of directly supplying power without diagnosing the external power source. This power control circuit determines the power control command by judging the power information, and then controls the power drive unit based on the power control command. This can avoid the risk of directly supplying power in the case of overvoltage or undervoltage, thereby improving the accuracy of power control.

[0062] Furthermore, based on the first embodiment of this application described above, a second embodiment of the power control circuit of this application is proposed. The first terminal of the control chip 10 includes a first control terminal X1 and second control terminals X21 and X22. The power protection unit 30 includes an input relay control subunit 31 and an output relay control subunit 32. The first terminal of the input relay control subunit 31 is connected to the first terminal of the output relay control subunit 32. The second terminal of the input relay control subunit 31 is connected to the external power supply 200. The third terminal of the input relay control subunit 31 is connected to the first control terminal X1. The second terminal of the output relay control subunit 32 is connected to the first terminal of the power drive unit 40. The third terminal of the output relay control subunit 32 is connected to the second control terminals X21 and X22.

[0063] Both the input relay control subunit 31 and the output relay control subunit 32 consist of a level control circuit and a relay (the composition of the input relay control subunit 31 is used as an example for explanation). The input terminal of the level control circuit is connected to the first control terminal X1 or the second control terminals X21 and X22. The output terminal of the level control circuit is connected to the control terminal of the relay. The first terminal of the relay is connected to the first terminal of other relays. The second terminal of the relay in the input relay control subunit is connected to the external power supply 200. The second terminal of the relay in the output relay control subunit is connected to the first terminal of the power drive unit 40.

[0064] In this embodiment, the first terminal of the control chip 10 includes a first control terminal X1 and second control terminals X21 and X22, and the power protection unit 30 includes an input relay control subunit 31 and an output relay control subunit 32, which can be referred to as follows. Figure 2 , Figure 2 This is a circuit connection diagram of the power protection unit in the power control circuit of this application (one diagram is possible, but other circuit connections and compositions are also possible). Taking the input relay control subunit 31 as an example, when an abnormality (such as overvoltage, undervoltage, etc.) is detected in the current and voltage of the external power supply 200, the control chip 10 will output a first level (which can be a high level or a low level) to control the level control circuit to disconnect the relay. At this time, the relay will control the external power supply 200 to be floating, that is, connected to port 4 in the diagram. The effect is that the external power supply 200 is not connected to the power control circuit. Conversely, if the current and voltage are normal, the external power supply 200 will be disconnected. The power control circuit is connected at 00. The principle of the output relay control subunit 32 is the same as that of the input relay control subunit 31, except that the output relay control subunit 32 detects the output current and voltage. The principle behind setting the positive output terminal V+ and the negative output terminal V- in the output relay control subunit 32 is that it allows selective control of either the positive output terminal V+ or the negative output terminal V-. For example, if the output current is abnormal, the positive output terminal V+ is disconnected; conversely, if the output voltage is abnormal, the negative output terminal V- is disconnected. Alternatively, the input relay control subunit 31 could control two relays; this is not limited here. It is worth noting that the internal connection circuit 33 can be a normal current-limiting, voltage-limiting, or other protection circuit (or other functional circuits, which are not limited here), such as open-circuit and short-circuit protection. In this case, the input relay control subunit 31 and the output relay control subunit 32 are connected through the internal connection circuit 33 to control the entire circuit to provide normal power supply when the current and voltage of the input relay control subunit 31 and the output relay control subunit 32 are normal.

[0065] In one embodiment, based on the first and / or second embodiments of this application described above, a third embodiment of the power control circuit of this application is proposed, wherein the isolation feedback unit 20 includes:

[0066] The isolation acquisition chip U1 has its input terminal connected to the fourth terminal of the power protection unit 30.

[0067] Operational amplifier Y has its first input terminal connected to the first output terminal of isolation acquisition chip U1, its second input terminal connected to the second output terminal of isolation acquisition chip U1, and its output terminal connected to the second terminal of control chip 10.

[0068] The fourth terminal of the power protection unit 30 includes either the first terminal or the second terminal of the power protection unit 30.

[0069] In this embodiment, the isolation feedback unit 20 includes an isolation acquisition chip U1 and an operational amplifier Y. The isolation acquisition chip U1 can acquire the current and voltage values ​​(in this application, these can be current and voltage values ​​or other circuit parameters; here, only current and voltage values ​​are used for description) of the first terminal or the second terminal (i.e., the input or output terminal) of the power protection unit 30. (Refer to...) Figure 3 , Figure 3 This is a schematic diagram of the circuit connection of the isolation feedback unit in the power control circuit of this application (one schematic diagram is possible, but other circuit connections and compositions are also possible). The isolation acquisition chip U1 can be a commonly used isolation acquisition chip (mainly because the grounding terminals on both sides of the isolation acquisition chip are different, forming an isolation effect), such as the NSi13 series, which will not be described in detail here. The operational amplifier Y can be a commonly used amplifying operational amplifier, used to amplify the acquired signal and output it to the control chip 10. The second terminal of the control chip 10 can be the sampling port on the control chip 10, used to acquire current and voltage values. It is worth noting that the entire isolation feedback unit 20 can also use other methods, such as directly acquiring the signal using a single isolation chip, but the isolation chip can directly amplify the acquired signal, or other methods can be used, which will not be described in detail here. At this time, based on the acquired signal, a judgment is made to diagnose whether there is a fault in the power supply through the diagnostic algorithm in the control chip 10 (mainly setting overcurrent, overvoltage, undervoltage, etc.). After confirming that there is no fault, the power supply is powered on to ensure the accuracy of power-on. At the same time, the external power supply is isolated from the microcontroller power supply to ensure the safety of the core diagnostic circuit.

[0070] Furthermore, based on the first, second, and / or third embodiments of this application described above, a fourth embodiment of the power control circuit of this application is proposed. The third terminal of the control chip 10 includes a first driving terminal HGATE, a second driving terminal LGATE, a first output terminal SW, and a second output terminal VCC. The power drive unit 40 includes multiple drive control subunits and output subunits. The drive control subunits include a first drive control subunit 41, a second drive control subunit 42, and a third drive control subunit 43. The first output terminal SW is connected to the first input terminal of the output subunit, and the second output terminal VCC is connected to the second input terminal of the output subunit. The output of the output subunit... The first terminal of the first drive control subunit 41 is connected to the power supply device 300. The first terminal of the first drive control subunit 41 is connected to the second terminal of the power protection unit 30. The second terminal of the first drive control subunit 41 is connected to the first drive terminal HGATE. The third terminal of the first drive control subunit 41 is connected to the first output terminal SW. The first terminal of the second drive control subunit 42 is connected to the first output terminal SW. The second terminal of the second drive control subunit 42 is connected to the second drive terminal LGATE. The third terminal of the second drive control subunit 42 is connected to the third terminal of the third drive control subunit 43 and then grounded. The first terminal of the third drive control subunit 43 is connected to the first output terminal SW. The drive control subunit includes:

[0071] The input circuit, with its input terminal serving as the second terminal of the drive control subunit;

[0072] The driving switch transistor is used as the first terminal of the driving control subunit, and the second terminal of the driving switch transistor is used as the third terminal of the driving control subunit. The third terminal of the driving switch transistor is connected to the output terminal of the input circuit.

[0073] In this embodiment, the third terminal of the control chip 10 includes a first driving terminal HGATE, a second driving terminal LGATE, a first output terminal SW, and a second output terminal VCC. The power drive unit 40 includes multiple drive control subunits and output subunits. The drive control subunits include a first drive control subunit 41, a second drive control subunit 42, and a third drive control subunit 43, which can be referred to as... Figure 4 , Figure 4This is a schematic diagram of the circuit connection of the power drive unit in the power control circuit of this application (one schematic diagram is possible, but other circuit connections and compositions are also possible). At this time, the three-level control of the output power ensures the safety of the power output downstream circuit and avoids overvoltage damage to components such as the battery and body control circuit. This is achieved through three drive control sub-units. The output sub-unit refers to the connection circuit that outputs the first output terminal SW and the second output terminal VCC in the figure. Taking the power supply device 300 as a battery as an example, when it is determined that there are no abnormalities in the power information (abnormalities include at least over-temperature, over-voltage, over-current, short circuit, etc.), the three drive control sub-units will be controlled to supply power to the battery. At the same time, the control waveforms of the three drive control sub-units will be changed according to the actual charging status of the battery to achieve accurate power supply to the power supply device 300.

[0074] Furthermore, based on the first, second, third, and / or fourth embodiments of this application described above, a fifth embodiment of the power control circuit of this application is proposed. The power control circuit includes an isolated power supply unit, which includes:

[0075] Power supply diode D, the anode of power supply diode D is connected to external power supply 200;

[0076] The isolated power supply chip U2 has its input terminal connected to the cathode of the power supply diode D, and its output terminal connected to the power supply terminal XVCC of the control chip 10.

[0077] In one embodiment, the power control circuit includes a communication unit, which includes:

[0078] The communication transceiver chip U3 has its input terminal connected to the communication terminal of the control chip 10, and its output terminal connected to an external communication terminal.

[0079] In this embodiment, the power control circuit includes an isolated power supply unit, which includes a power supply diode D (to prevent reverse connection) and an isolated power supply chip U2, as can be referred to... Figure 5 , Figure 5 This is a schematic diagram of the circuit connection of the isolated power supply unit in the power control circuit of this application (one schematic diagram, other circuit connections and compositions are also possible). At this time, the 24V voltage in the external power supply 200 will be converted into 3.3V voltage through the isolated power supply chip U2 (a commonly used DC step-down isolation chip) (mainly because the grounding terminals on both sides of the isolated power supply chip are different, forming an isolation effect), to supply power to the power supply terminal XVCC of the control chip 10, thereby ensuring the normal operation of the control chip 10. Of course, the entire isolated power supply unit can also be composed of other methods, as long as it ensures that the control chip 10 is powered and works normally.

[0080] In one embodiment, referring to Figure 6 , Figure 6 This is a schematic diagram of the circuit connection of the communication unit in the power control circuit of this application (one schematic diagram is possible, but other circuit connections and compositions are also possible). The communication transceiver chip U3 in the communication unit (which can share a common ground with one side of the isolation power supply chip) is used to communicate with other terminals in the vehicle, such as the vehicle control display screen or the car instrument panel. In this way, the diagnostic information in the entire control process can be sent to the car instrument panel through the communication unit. The communication transceiver chip U3 can be a commonly used communication transceiver chip. Of course, the entire circuit can also have other components and connections, as long as it can realize communication with the external communication terminal.

[0081] Based on the above embodiments of the power control circuit, a power control method is proposed, referring to... Figure 8 , Figure 8 This is a flowchart illustrating the first embodiment of the power control method of this application.

[0082] Reference Figure 8 This application provides a power control method. In a first embodiment of the power control method, the power control method is applied to the aforementioned power control circuit. The power control method includes:

[0083] Step S10: Obtain the power information of the power protection unit and determine the power control command based on the power information;

[0084] Step S20: Control the power drive unit according to the power control command to achieve power control.

[0085] In this embodiment, power control primarily involves diagnosing the power supply status. This is achieved by acquiring power information from the power protection unit and then determining the power control command based on this information. Specifically, it checks whether the operating circuit parameters in the power information meet user-defined threshold values. If the threshold values ​​are not met, the power control command is either to disconnect the external power supply input or output. It's worth noting that disconnecting the external power supply input means controlling the input relay control unit to disconnect, and disconnecting the external power supply output means controlling the output relay control unit to disconnect. The choice between disconnecting the external power supply input or output can be made based on the actual situation. For example, if the external power supply is abnormal, it can be disconnected; otherwise, if the output is abnormal after the external power supply passes through the power protection unit, only the output of the power protection unit needs to be disconnected, while maintaining normal external power supply. Conversely, if the user-defined threshold values ​​are met, the power control command is to control the power drive unit. This command initiates the power drive unit's operation and collects power supply information in real time. The control is then redefined based on this information to ensure the accuracy of the overall power supply control.

[0086] In this embodiment, power information from the power protection unit is acquired, and power control commands are determined based on this information. The power drive unit is then controlled according to these commands to achieve power control. By collecting power information from the power protection unit, power control commands are determined based on this information (determining whether there are risks such as overvoltage or undervoltage). The power drive unit is then controlled based on these commands, thus avoiding the phenomenon of directly supplying power without diagnosing the external power supply. This power control circuit determines power control commands by judging power information and then controls the power drive unit based on these commands, avoiding the risk of directly supplying power in cases of overvoltage or undervoltage, thereby improving the accuracy of power control.

[0087] Based on the first embodiment of the power control method described above, a second embodiment of the power control method of this application is proposed. The power information includes voltage and current values. The step of determining the power control command based on the power information includes:

[0088] Step S11: When the voltage value meets the preset voltage threshold and the current value meets the preset current threshold, generate a drive enable signal.

[0089] Step S12: Obtain the power supply status of the power supply device under the control of the drive enable signal, and store the power supply status in the power control command.

[0090] In this embodiment, the power information includes voltage and current values. These can be the voltage and current values ​​at the input terminal of the power protection unit, the output terminal of the power protection unit, or both the input and output terminals of the power protection unit. A drive enable signal is generated only when the voltage and current values ​​both meet a preset voltage threshold and a preset current threshold. This means that both the output and input voltage and current values ​​of the power protection unit meet the user-defined voltage and current thresholds. The voltage threshold refers to a user-defined voltage range, and the current threshold refers to a user-defined current range. In other words, when the power diagnostic result indicates normal power supply, a drive enable signal is generated. The drive enable signal is an instruction to the power supply drive unit to start supplying power to the power supply device. At this time, the power supply status of the power supply device under the control of the drive enable signal is acquired and stored in the power control instruction. This means that the power supply drive unit is subsequently controlled based on the power supply status stored in the power control instruction, ensuring the accuracy of the power supply start timing.

[0091] In one embodiment, the step of controlling the power drive unit according to the power control command includes:

[0092] Step S21: Determine the power supply status in the power control command and determine the target duty cycle corresponding to the power supply status in the preset duty cycle correspondence table;

[0093] Step S22: Drive the drive switch in the power drive unit based on the target duty cycle.

[0094] In this embodiment, the power supply state in the power control command is determined, and the target duty cycle corresponding to the power supply state is determined in the preset duty cycle correspondence table. Finally, the drive switch in the power drive unit is driven and controlled based on the target duty cycle. The target duty cycle refers to the duty cycle of the drive signal controlling the drive switch. The preset duty cycle correspondence table refers to the duty cycle correspondence table for different states. The power supply state refers to the remaining power and actual operating status of the power supply device. Therefore, targeted control can be performed based on the remaining power and actual operating status to ensure the accuracy of power control. For example, taking a battery as the power supply device, the MCU internally stores a SOC (State of Charge) table (i.e., the preset duty cycle correspondence table). When the battery voltage is detected as fully charged, the power output voltage is reduced by adjusting the duty cycle of the power drive unit. For example, when the battery voltage drops below 80%, the MCU drive duty cycle slowly increases and cycles repeatedly to maintain the battery voltage at 80%. Other controls can also be implemented, meaning they can be predefined in the preset duty cycle correspondence table to ensure the specificity of power control. Further, refer to... Figure 7 , Figure 7This is a waveform diagram illustrating current control in the power control circuit of this application. During the entire control process, a battery charging soft-start strategy can also be employed. Taking the solid line waveform (battery charging soft-start strategy, dashed line represents the conventional strategy) as an example, the battery power is gradually increased during power startup to avoid inrush current, thereby protecting the battery and extending its lifespan. It is worth noting that the battery charging soft-start strategy, such as... Figure 7 This technology can mitigate the impact of inrush current on battery life, helping to extend battery life. It involves gradually increasing the power supply during startup to avoid inrush current and thus protect the battery and extend its lifespan.

[0095] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the power control method of this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0096] This application also provides a control chip, please refer to... Figure 9 The control chip includes:

[0097] The acquisition module A10 is used to acquire the power information of the power protection unit and determine the power control command based on the power information.

[0098] The control module A20 is used to control the power drive unit according to the power control command to realize power control.

[0099] The power control circuit provided in this application, employing the power control method described in the above embodiments, can solve the technical problem of low accuracy in power control. Compared with the prior art, the beneficial effects of the power control circuit provided in this application are the same as those of the power control method provided in the above embodiments, and other technical features in the power control circuit are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0100] This application provides a vehicle that includes the power control circuit described above;

[0101] The vehicle is used to execute the power control method described above.

[0102] The vehicle further includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the power control method in Embodiment 1 above.

[0103] The following is for reference. Figure 10The diagram illustrates a structural schematic of a vehicle suitable for implementing embodiments of this application. The vehicle in these embodiments may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 10 The vehicle shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of this application.

[0104] like Figure 10 As shown, the vehicle may include a processing unit 1001 (e.g., a central processing unit, a graphics processor, etc.) that can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for vehicle operation. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following devices may be connected to the I / O interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. Communication device 1009 allows the vehicle to communicate wirelessly or wiredly with other devices to exchange data. Although a vehicle with various devices is shown in the figure, it should be understood that it is not required to implement or possess all of the devices shown. More or fewer devices may be implemented or possessed alternatively.

[0105] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0106] The vehicle provided in this application, employing the power control method described in the above embodiments, can solve the technical problem of low accuracy in power control. Compared with the prior art, the beneficial effects of the vehicle provided in this application are the same as those of the power control method provided in the above embodiments, and other technical features of the vehicle are the same as those disclosed in the previous embodiment method, and will not be repeated here.

[0107] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0108] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0109] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the power control method in the above embodiments.

[0110] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor devices, apparatuses, or components, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution apparatus, device, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0111] The aforementioned computer-readable storage medium may be included in the vehicle or may exist independently and not installed in the vehicle.

[0112] The aforementioned computer-readable storage medium carries one or more programs that, when executed by a vehicle, cause the vehicle to:

[0113] Obtain the power information of the power protection unit and determine the power control command based on the power information;

[0114] The power drive unit is controlled according to the power control command to achieve power control.

[0115] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0116] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing 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 the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using dedicated hardware-based apparatus to perform the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0117] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0118] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described power control method, thereby solving the technical problem of low accuracy in power control. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the power control method provided in the above embodiments, and will not be repeated here.

[0119] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the power control method described above.

[0120] The computer program product provided in this application can solve the technical problem of low accuracy in power control. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the power control method provided in the above embodiments, and will not be repeated here.

[0121] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A power supply control circuit, characterized in that, The power control circuit includes: Control chip; A power protection unit, wherein the first end of the power protection unit is connected to an external power source, and the third end of the power protection unit is connected to the first end of the control chip; An isolation feedback unit is provided, wherein a first end of the isolation feedback unit is connected to a fourth end of the power protection unit, and a second end of the isolation feedback unit is connected to a second end of the control chip. The isolation feedback unit is used to collect power information from the power protection unit. A power drive unit is provided, wherein a first terminal of the power drive unit is connected to a second terminal of the power protection unit, the second terminal of the power drive unit is connected to a power supply device, and a third terminal of the power drive unit is connected to a third terminal of the control chip. The control chip is used to determine a power control command based on the power information and to control the power drive unit based on the power control command to achieve power control. The first terminal of the control chip includes a first control terminal and a second control terminal. The power protection unit includes an input relay control subunit and an output relay control subunit. The first terminal of the input relay control subunit is connected to the first terminal of the output relay control subunit, the second terminal of the input relay control subunit is connected to the external power supply, the third terminal of the input relay control subunit is connected to the first control terminal, the second terminal of the output relay control subunit is connected to the first terminal of the power drive unit, and the third terminal of the output relay control subunit is connected to the second control terminal. The input relay control subunit and the output relay control subunit are both composed of a level control circuit and a relay. The input terminal of the level control circuit is connected to the first control terminal or the second control terminal, and the output terminal of the level control circuit is connected to the control terminal of the relay. The first terminal of the relay is connected to the first terminal of other relays. The second terminal of the relay in the input relay control subunit is connected to the external power supply, and the second terminal of the relay in the output relay control subunit is connected to the first terminal of the power drive unit.

2. The power control circuit as described in claim 1, characterized in that, The isolation feedback unit includes: An isolation acquisition chip, the input terminal of which is connected to the fourth terminal of the power protection unit; An operational amplifier, wherein the first input terminal of the operational amplifier is connected to the first output terminal of the isolation acquisition chip, the second input terminal of the operational amplifier is connected to the second output terminal of the isolation acquisition chip, and the output terminal of the operational amplifier is connected to the second terminal of the control chip; The fourth terminal of the power protection unit includes either the first terminal or the second terminal of the power protection unit.

3. The power control circuit as described in claim 1, characterized in that, The third terminal of the control chip includes a first driving terminal, a second driving terminal, a first output terminal, and a second output terminal. The power drive unit includes multiple drive control subunits and output subunits. The drive control subunits include a first drive control subunit, a second drive control subunit, and a third drive control subunit. The first output terminal is connected to the first input terminal of the output subunit, the second output terminal is connected to the second input terminal of the output subunit, and the output terminal of the output subunit is connected to the power supply device. The first terminal of the first drive control subunit is connected to the second terminal of the power protection unit. The second terminal of the first drive control subunit is connected to the first driving terminal. The third terminal of the first drive control subunit is connected to the first output terminal. The first terminal of the second drive control subunit is connected to the first output terminal, and the second terminal of the second drive control subunit is connected to the second driving terminal. The third terminal of the second drive control subunit is connected to the third terminal of the third drive control subunit and then grounded. The first terminal of the third drive control subunit is connected to the first output terminal. The drive control subunit includes: The input circuit, wherein the input terminal of the input circuit serves as the second terminal of the drive control subunit; A drive switch transistor is provided, wherein the first end of the drive switch transistor serves as the first end of the drive control subunit, the second end of the drive switch transistor serves as the third end of the drive control subunit, and the third end of the drive switch transistor is connected to the output end of the input circuit.

4. The power control circuit as described in any one of claims 1 to 3, characterized in that, The power control circuit includes an isolated power supply unit, which includes: A power supply diode, wherein the anode of the power supply diode is connected to the external power source; An isolated power supply chip is provided, wherein the input terminal of the isolated power supply chip is connected to the cathode of the power supply diode, and the output terminal of the isolated power supply chip is connected to the power supply terminal of the control chip.

5. The power control circuit as described in any one of claims 1 to 3, characterized in that, The power control circuit includes a communication unit, which includes: A communication transceiver chip, wherein the input terminal of the communication transceiver chip is connected to the communication terminal of the control chip, and the output terminal of the communication transceiver chip is connected to an external communication terminal.

6. A power supply control method, characterized in that, The power control method is applied to the power control circuit according to any one of claims 1 to 5, and the power control method includes: Obtain the power information of the power protection unit and determine the power control command based on the power information; The power drive unit is controlled according to the power control command to achieve power control.

7. The power control method as described in claim 6, characterized in that, The power information includes voltage and current values, and the step of determining the power control command based on the power information includes: When the voltage value meets a preset voltage threshold and the current value meets a preset current threshold, a drive enable signal is generated. The power supply status of the power supply device under the control of the drive enable signal is obtained, and the power supply status is stored in the power control command.

8. The power control method as described in claim 6, characterized in that, The step of controlling the power drive unit according to the power control command includes: Determine the power supply status in the power control command, and determine the target duty cycle corresponding to the power supply status in the preset duty cycle correspondence table; The drive switch in the power drive unit is driven and controlled based on the target duty cycle.

9. A vehicle, characterized in that, The vehicle includes a power control circuit as described in any one of claims 1 to 5; The vehicle is used to perform the power control method as described in any one of claims 6 to 8.

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