Power supply control circuit and method and vehicle

Abstract

The invention discloses a power supply control circuit and method and a vehicle, relates to the technical field of power supply control, and discloses a power supply control circuit comprising a control chip; the first end of the power supply protection unit is connected with an external power supply, and the third end of the power supply protection unit is connected with the first end of the control chip; the first end of the isolation feedback unit is connected with the fourth end of the power protection unit, the second end of the isolation feedback unit is connected with the second end of the control chip, and the isolation feedback unit is used for collecting power information of the power protection unit; the first end of the power supply driving unit is connected with the second end of the power supply protection unit, the second end of the power supply driving unit is connected with the power supply device, the third end of the power supply driving unit is connected with the third end of the control chip, and the control chip is used for determining a power supply control instruction based on the power supply information. And the power supply driving unit is controlled based on the power supply control instruction so as to realize power supply control. According to the invention, the accuracy of power supply control is improved.

Description

Technical Field

[0001] The present application relates to the field of power supply control technology, and in particular to a power supply control circuit, method and vehicle. Background Art

[0002] As vehicles become more and more popular, the power control on vehicles has also been developed and updated, and users have also put forward higher requirements for the power control on vehicles.

[0003] The traditional power control circuit directly supplies power to the vehicle through an external power supply to ensure the normal operation of the vehicle. This power control circuit has a great defect. Because the external power supply directly supplies power to the vehicle, there is a phenomenon of directly supplying power without diagnosing the external power supply. That is, this power control circuit directly supplies power without diagnosing the external power supply (there is a risk of power supply overvoltage, undervoltage, etc.), which causes the accuracy of power control to be low.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present application is to provide a power control circuit, method and vehicle, aiming to solve the technical problem of how to solve the low accuracy of power control.

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

[0007] Control chip;

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

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

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

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

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

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

[0014] An isolation acquisition chip, wherein an input end of the isolation acquisition chip is connected to the fourth end of the power protection unit;

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

[0016] Wherein, the fourth end of the power protection unit includes the first end of the power protection unit or the second end of the power protection unit.

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

[0018] An input circuit, wherein an input end of the input circuit serves as a second end of the drive control subunit;

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

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

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

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

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

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

[0025] In addition, to achieve the above-mentioned purpose, the present application also provides a power supply control method, which is applied to the above-mentioned power supply control circuit, and the power supply control method includes:

[0026] Acquiring power information of the power protection unit, and determining a power control instruction according to the power information;

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

[0028] In one embodiment, the power information includes a voltage value and a current value, and the step of determining a power control instruction according to the power information includes:

[0029] When the voltage value satisfies a preset voltage threshold and the current value satisfies a preset current threshold, generating a drive enable signal;

[0030] The power supply state of the power supply device under the control of the drive enable signal is acquired, and the power supply state is stored in the power supply control instruction.

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

[0032] Determine the power supply state in the power control instruction, and determine the target duty cycle corresponding to the power supply state in a preset duty cycle corresponding table;

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

[0034] In addition, to achieve the above-mentioned purpose, the present application also provides a vehicle, wherein the vehicle includes the above-mentioned power supply control circuit;

[0035] Wherein, the vehicle is used to execute the above-mentioned power supply control method.

[0036] The embodiment of the present application provides a power control circuit, including a control chip; a power protection unit, wherein a first end of the power protection unit is connected to an external power supply, and a third end of the power protection unit is connected to a first end of the control chip; an isolation feedback unit, 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, and the isolation feedback unit is used to collect power information of the power protection unit; a power drive unit, wherein a first end of the power drive unit is connected to a second end of the power protection unit, a second end of the power drive unit is connected to a power supply device, and a third end of the power drive unit is connected to a third end of the control chip, wherein the control chip is used to determine a power control instruction based on the power information, and control the power drive unit based on the power control instruction to achieve power control, and the power information of the power protection unit is collected through the isolation feedback unit to determine the power control instruction based on the power information (based on the power information, whether there is a risk of overvoltage, undervoltage, etc.), and then control the power drive unit based on the power control instruction, thereby avoiding the phenomenon of directly supplying power without diagnosing the external power supply. This power control circuit determines the power control instruction by judging the power information, and then controls the power drive unit based on the power control instruction. This can avoid the risk of direct power supply in situations such as power overvoltage or undervoltage, thereby improving the accuracy of power control. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0039] Figure 3 This is a circuit connection diagram of an isolated feedback unit in the power supply control circuit of the present application;

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

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

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

[0043] Figure 7 A waveform diagram of current control in the power control circuit of the present application;

[0044] Figure 8 This is a flow chart of the first embodiment of the power control method of the present application;

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

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

[0047] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with 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 input relay control subunit; 321. First level control circuit in output relay control subunit; 322. Second level control circuit in output relay control subunit; X1. First control terminal; X21. (First) second control terminal; X22. (Second) second control terminal; K1. Relay in input relay control subunit; K2. First relay in output relay control subunit; K3. Second relay in 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 - the tenth diode; D, diode; M1-M3, the first drive switch tube-the third drive switch tube; L1, inductor; Q1-Q3, the first transistor-the third transistor; Y, operational amplifier; X3 (X31), the second end of the control chip; U1, isolation acquisition chip; 41, the first drive control subunit; V+, the positive output end; V-, the negative output end; 411, the input circuit in the first drive control subunit; 42, the second drive control subunit; 421, the input circuit in the second drive control subunit; 43, the third drive control subunit; 431, the input circuit in the third drive control subunit; SW, the first output end; HGATE, the first drive end; LGATE, the second drive end; BST, the buck-boost pin; VCC, the second output end; XVCC, the power supply end of the control chip; U2, the isolation power supply chip; D, the power supply diode; DZ, the voltage regulator; U3, the communication transceiver chip; LX, the coil; RX, the first communication end of the control chip; TX, the second communication end of the control chip. DETAILED DESCRIPTION

[0050] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0051] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0052] The existing vehicle power supply method is to directly use an external power supply to power the vehicle, and during the entire vehicle power supply process, whether the external power supply meets the vehicle's usage requirements is not considered. That is, if there is a phenomenon such as power overvoltage or undervoltage at this time, the vehicle will be powered normally, which will cause the internal powered devices to work poorly. For example, overvoltage may damage the device, and undervoltage may not achieve the working effect. That is, at this time, because there is no detection of vehicle power supply (overvoltage, undervoltage, overcurrent, etc.), the entire power supply control effect is poor (that is, because the power supply control does not have a diagnostic function, the accuracy of the power supply control is not high, resulting in poor power supply control effect).

[0053] Therefore, based on the above shortcomings of the power control circuit, the power control circuit of the present application is proposed. The main solution of the embodiment of the present application is: to collect the power information of the power protection unit through the isolation feedback unit, to determine the power control instruction based on the power information (to determine whether there is a risk of overvoltage, undervoltage, etc. based on the power information), and then control the power drive unit based on the power control instruction, so as to avoid the phenomenon of direct power supply without diagnosing the external power supply. This power control circuit determines the power control instruction by judging the power information, and then controls the power drive unit based on the power control instruction, which can avoid the risk of direct power supply in situations such as power overvoltage and undervoltage, thereby improving the accuracy of power control.

[0054] Based on this, the embodiment of the present application provides 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 the present application.

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

[0056] Control chip 10;

[0057] A power protection unit 30, wherein a first end of the power protection unit 30 is connected to the external power supply 200, and a third end of the power protection unit 30 is connected to a first end of the control chip 10;

[0058] An isolation feedback unit 20, wherein a first end of the isolation feedback unit 20 is connected to a fourth end of the power protection unit 30, a second end of the isolation feedback unit 20 is connected to a second end of the control chip 10, and the isolation feedback unit 20 is used to collect power information of the power protection unit 30;

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

[0060] In this embodiment, the power control circuit is composed of a control chip 10, a power protection unit 30, an isolation feedback unit 20 and a power drive unit 40, wherein the control chip 10 can be a single chip microcomputer or MCU (Microcontroller Unit, micro control unit), etc., mainly realizes diagnosis of the collected information (mainly the current and voltage information of the external power supply 200, etc.), and then controls the output of the power drive unit 40 based on the diagnosis result to supply power to the power supply device 300. The power protection unit 30 mainly controls the external power supply 200 to connect for power supply or disconnect for power outage based on the diagnosis result. If the diagnosis result shows that the current, voltage and other parameters of the external power supply 200 are normal, the power protection unit 30 is controlled to connect to the external power supply 200 for power supply, otherwise the external power supply 200 is disconnected. The isolation feedback unit 20 is used to isolate and collect 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 supply information. The collection method can be a commonly used collection method of parameters such as current, voltage or power, which is not limited here. The power drive unit 40 refers to a unit that drives power supply based on the diagnosis result. When the power protection unit 30 is connected to the external power supply 200 for power supply, the internal devices will be controlled based on the real-time power supply situation, such as controlling the charging current and voltage, so as to ensure the accuracy of charging control. It is worth noting that the control chip 10 will determine the power control instruction based on the power information, and control the power drive unit 40 based on the power control instruction. The power control instruction can be an instruction to start powering the power supply device 300, or it can obtain the charging or power supply requirements of the power supply device 300, and then adaptively control based on the charging or power supply requirements after starting power supply, so as to ensure the accuracy of power control by controlling the start of power supply and the power supply process.

[0061] In this embodiment, the power control circuit includes a control chip; a power protection unit, a first end of the power protection unit is connected to an external power supply, and a third end of the power protection unit is connected to a first end of the control chip; an isolation feedback unit, 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, and the isolation feedback unit is used to collect power information of the power protection unit; a power drive unit, a first end of the power drive unit is connected to a second end of the power protection unit, a second end of the power drive unit is connected to a power supply device, and a third end of the power drive unit is connected to a third end of the control chip, wherein the control chip is used to determine a power control instruction based on the power information, and control the power drive unit based on the power control instruction to achieve power control, and collect the power information of the power protection unit through the isolation feedback unit to determine the power control instruction based on the power information (based on the power information to determine whether there is a risk of overvoltage, undervoltage, etc.), and then control the power drive unit based on the power control instruction, so as to avoid the phenomenon of directly supplying power without diagnosing the external power supply. This power control circuit determines the power control instruction by judging the power information, and then controls the power drive unit based on the power control instruction. This can avoid the risk of direct power supply in situations such as power overvoltage or undervoltage, thereby improving the accuracy of power control.

[0062] Further, based on the above-mentioned first embodiment of the present application, a second embodiment of the power control circuit of the present application is proposed, the first end of the control chip 10 includes a first control end X1 and second control ends X21, X22, the power protection unit 30 includes an input relay control subunit 31 and an output relay control subunit 32, the first end of the input relay control subunit 31 is connected to the first end of the output relay control subunit 32, the second end of the input relay control subunit 31 is connected to the external power supply 200, the third end of the input relay control subunit 31 is connected to the first control end X1, the second end of the output relay control subunit 32 is connected to the first end of the power drive unit 40, and the third end of the output relay control subunit 32 is connected to the second control ends X21, X22;

[0063] Among them, the input relay control subunit 31 and the output relay control subunit 32 are both composed of a level control circuit and a relay (the composition of the input relay control subunit 31 is taken as an example for explanation), the input end of the level control circuit is connected to the first control end X1 or the second control end X21, X22, the output end of the level control circuit is connected to the control end of the relay, the first end of the relay is connected to the first end of other relays, the second end of the relay in the input relay control subunit is connected to the external power supply 200, and the second end of the relay in the output relay control subunit is connected to the first end of the power drive unit 40.

[0064] In this embodiment, the first end of the control chip 10 includes a first control end X1 and a second control end X21, X22, and the power protection unit 30 includes an input relay control subunit 31 and an output relay control subunit 32. Figure 2 , Figure 2 This is a circuit connection diagram of the power protection unit in the power control circuit of the present application (one of the schematic diagrams, which can also be other circuit connections and compositions). Taking the input relay control subunit 31 as an example, when the current and voltage of the external power supply 200 are detected to be abnormal (such as overvoltage, undervoltage, etc.), 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 suspended, that is, connected to port 4 in the figure, that is, the effect is that the external power supply 200 is not connected to the power control circuit. On the contrary, if the current and voltage are normal, the external power supply 200 will be disconnected. 00 is connected to the power supply control circuit. Of course, 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. At this time, the principle of setting the positive output terminal V+ and the negative output terminal V- in the output relay control subunit 32 is that the positive output terminal V+ or the negative output terminal V- can be selectively controlled to disconnect. For example, the positive output terminal V+ is disconnected for abnormal output current, and the negative output terminal V- is disconnected for abnormal output voltage. It can also be controlled by two relays in the input relay control subunit 31, which is not limited here. It is worth noting that the internal connection circuit 33 can be a normal current limiting and voltage limiting circuit or other protection circuit (it can also be other functional circuits, which are not limited here), such as circuit breaking and short circuit protection, etc. At this time, the input relay control subunit 31 and the output relay control subunit 32 are connected through the internal connection circuit 33, so that when the current and voltage of the input relay control subunit 31 and the output relay control subunit 32 are normal, the entire circuit is controlled to be powered normally.

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

[0066] An isolation acquisition chip U1, wherein the input end of the isolation acquisition chip U1 is connected to the fourth end of the power protection unit 30;

[0067] Operational amplifier Y, wherein a first input terminal of the operational amplifier Y is connected to a first output terminal of the isolation acquisition chip U1, a second input terminal of the operational amplifier Y is connected to a second output terminal of the isolation acquisition chip U1, and an output terminal of the operational amplifier Y is connected to a second terminal of the control chip 10;

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

[0069] In this embodiment, the isolated feedback unit 20 includes an isolated acquisition chip U1 and an operational amplifier Y. At this time, the isolated acquisition chip U1 can collect the current and voltage values ​​of the first end of the power protection unit 30 or the second end of the power protection unit 30 (that is, the input end or the output end of the power protection unit 30) (in this application, it can be a current and voltage value or other circuit parameters, and only the current and voltage values ​​are used for explanation here), which can be referred to Figure 3 , Figure 3 This is a circuit connection diagram of the isolated feedback unit in the power control circuit of this application (one of the schematic diagrams, it can also be other circuit connections and compositions), the isolated acquisition chip U1 can be a commonly used isolated acquisition chip (mainly the ground terminals on both sides of the isolated acquisition chip are different to form an isolation effect), such as the NSi13 series, which will not be explained one by one here, the operational amplifier Y can be a commonly used amplifier, which is used to amplify the collected signal and output it to the control chip 10, and the second end of the control chip 10 can be a sampling port on the control chip 10, which is used to collect current and voltage values. It is worth noting that the entire isolated feedback unit 20 can also use other methods, such as directly collecting with a single isolation chip, but the collected signal can be directly amplified in the isolation chip, or it can be other methods, which will not be explained one by one here. At this time, judgment is made based on the collected signal to diagnose whether the power supply is faulty through the diagnostic algorithm in the control chip 10 (mainly set to overcurrent, overvoltage, undervoltage, etc.), and the power supply is powered on after there is no fault to ensure the accuracy of power-on, and 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] Further, based on the first embodiment, the second embodiment and / or the third embodiment of the present application, a fourth embodiment of the power control circuit of the present application is proposed, the third end of the control chip 10 includes a first drive end HGATE, a second drive end LGATE, a first output end SW and a second output end VCC, the power drive unit 40 includes a plurality of 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 end SW is connected to the first input end of the output subunit, the second output end VCC is connected to the second input end of the output subunit, and the output of the output subunit is connected to the output of the output subunit. The first end of the first driving control subunit 41 is connected to the second end of the power protection unit 30, the second end of the first driving control subunit 41 is connected to the first driving end HGATE, the third end of the first driving control subunit 41 is connected to the first output end SW, the first end of the second driving control subunit 42 is connected to the first output end SW, the second end of the second driving control subunit 42 is connected to the second driving end LGATE, the third end of the second driving control subunit 42 is connected to the third end of the third driving control subunit 43 and then grounded, the first end of the third driving control subunit 43 is connected to the first output end SW, and the driving control subunit includes:

[0071] An input circuit, wherein an input end of the input circuit serves as a second end of the driving control subunit;

[0072] A driving switch tube, wherein the first end of the driving switch tube serves as the first end of the driving control subunit, the second end of the driving switch tube serves as the third end of the driving control subunit, and the third end of the driving switch tube is connected to the output end 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 driving unit 40 includes a plurality of driving control subunits and output subunits, and the driving control subunits include a first driving control subunit 41, a second driving control subunit 42 and a third driving control subunit 43, which can be referred to Figure 4 , Figure 4This is a circuit connection diagram of the power drive unit in the power control circuit of the present application (one of the diagrams, it can also be other circuit connections and compositions). At this time, the three-level control of the output power ensures the safety of the post-power output circuit and avoids overvoltage damage to the battery and body control circuit. The output control is achieved through three drive control sub-units, wherein 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. At this time, taking the power supply device 300 as a battery as an example, when it is determined that there is no abnormality in the power information (the abnormality at least includes overtemperature, overvoltage, overcurrent, short circuit, etc.), the three drive control sub-units will be controlled to power the battery. At the same time, the control waveforms of the three drive control sub-units will be changed in combination with the actual charging condition of the battery to achieve accurate power supply of the power supply device 300.

[0074] Further, based on the first embodiment, the second embodiment, the third embodiment and / or the fourth embodiment of the present application, a fifth embodiment of the power supply control circuit of the present application is proposed, and the power supply control circuit includes an isolated power supply unit, and the isolated power supply unit includes:

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

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

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

[0078] The communication transceiver chip U3 has an input end connected to the communication end of the control chip 10 , and an output end 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. Figure 5 , Figure 5 This is a circuit connection diagram of the isolated power supply unit in the power control circuit of the present application (one of the diagrams, it can also be other circuit connections and compositions). At this time, the 24V voltage in the external power supply 200 will be converted into a 3.3V voltage through the isolated power supply chip U2 (which can be a commonly used DC step-down isolation chip) (mainly because the ground terminals on both sides of the isolated power supply chip are different, forming an isolation effect), so as 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 in other ways, and it is only necessary to ensure that the control chip 10 is powered normally.

[0080] In one embodiment, referring to Figure 6 , Figure 6 This is a circuit connection diagram of the communication unit in the power control circuit of the present application (one of the diagrams, it can also be other circuit connections and compositions), the communication transceiver chip U3 in the communication unit (which can share a ground with one side of the isolated power supply chip) is used to communicate with other terminals in the vehicle, such as the external communication terminal is a vehicle control display screen or a car instrument, and then the diagnostic information in the entire control process can be sent to the car instrument through the communication unit, wherein the communication transceiver chip U3 can be a commonly used communication transceiver chip, and the entire circuit can also be other compositions and connection relationships, as long as communication with the external communication terminal can be achieved.

[0081] Based on the above embodiment of the power control circuit, a power control method is proposed, referring to Figure 8 , Figure 8 This is a flow chart of the first embodiment of the power control method of the present application.

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

[0083] Step S10, obtaining power information of the power protection unit, and determining a power control instruction according to the power information;

[0084] Step S20, controlling the power drive unit according to the power control instruction to achieve power control.

[0085] In this embodiment, when the power supply control is performed, the power supply situation of the power supply is mainly diagnosed, and the power supply information of the power supply protection unit is obtained, and then the power supply control instruction is determined according to the power supply information, that is, whether the working circuit parameters in the power supply information meet the parameter threshold defined by the user is detected, and then when the parameter threshold defined by the user is not met, the power supply control instruction is determined to disconnect the input of the external power supply, or disconnect the output of the external power supply. It is worth noting that disconnecting the input of the external power supply at this time refers to controlling the input relay control subunit to disconnect, and disconnecting the output of the external power supply refers to controlling the output relay control subunit to disconnect. At this time, the output or input of the external power supply can be disconnected according to the actual situation. For example, the external power supply can be disconnected only because the external power supply is abnormal. On the contrary, because the output of the external power supply is abnormal after flowing through the power supply protection unit, it is sufficient to disconnect the output of the power supply protection unit, and the normal power supply of the external power supply can be maintained at this time. When the parameter threshold defined by the user is met, the power supply control instruction is determined to control the power drive unit. At this time, the power supply control instruction can be used to control the power drive unit to start drive control, and collect the power supply information under drive control in real time, and then re-determine the control based on the power supply information to ensure the accuracy of the entire power supply control.

[0086] In this embodiment, the power information of the power protection unit is obtained, and the power control instruction is determined according to the power information, and the power drive unit is controlled according to the power control instruction to realize power control, and the power information of the power protection unit is collected to determine the power control instruction based on the power information (based on the power information to determine whether there is a risk of overvoltage, undervoltage, etc.), and then the power drive unit is controlled based on the power control instruction, so as to avoid the phenomenon of directly supplying power without diagnosing the external power supply. This power control circuit determines the power control instruction by judging the power information, and then controls the power drive unit based on the power control instruction, which can avoid the risk of direct power supply in the case of power overvoltage, undervoltage, etc., and thus improve the accuracy of power control.

[0087] Based on the first embodiment of the power control method above, a second embodiment of the power control method of the present application is proposed, wherein the power information includes a voltage value and a current value, and the step of determining a power control instruction according to 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, generating a drive enable signal;

[0089] Step S12, obtaining the power supply status of the power supply device under the control of the drive enable signal, and storing the power supply status in the power supply control instruction.

[0090] In this embodiment, the power supply information includes voltage value and current value, which can be the voltage and current value of the input end of the power supply protection unit, or the voltage and current value of the output end of the power supply protection unit, or the voltage and current value of the output and input ends of the power supply protection unit. Only when the voltage value meets the preset voltage threshold and the current value meets the preset current threshold, that is, the voltage and current values ​​of the output and input ends of the power supply protection unit meet the voltage threshold and current threshold set by the user, the voltage threshold refers to the voltage range value set by the user, and the current threshold refers to the current range value set by the user, that is, at this time, the power supply diagnosis result is that the power supply is normal, and a drive enable signal will be generated. The drive enable signal refers to the instruction for 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 will be obtained, and then the power supply status will be stored in the power control instruction, that is, the power supply drive unit will be controlled based on the power supply status stored in the power control instruction, and the accuracy of the power supply start timing can be guaranteed at this time.

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

[0092] Step S21, determining the power supply state in the power supply control instruction, and determining the target duty cycle corresponding to the power supply state in a preset duty cycle corresponding table;

[0093] Step S22: driving and controlling the driving switch tube in the power driving unit based on the target duty cycle.

[0094] In this embodiment, by determining the power supply state in the power control instruction, and determining the target duty cycle corresponding to the power supply state in the preset duty cycle corresponding table, the driving switch tube in the power drive unit is finally driven and controlled based on the target duty cycle, wherein the target duty cycle refers to the duty cycle of the driving signal that controls the driving switch tube, the preset duty cycle corresponding table refers to the duty cycle corresponding table corresponding to different states, and the power supply state refers to the remaining power of the power supply device, the actual working condition, etc., and then targeted control can be performed based on the remaining power and the actual working condition to ensure the accuracy of the power control. For example, taking the power supply instrument as a battery as an example, the MCU internally stores the SOC (State of Charge) table (i.e., the preset duty cycle corresponding table). When the battery voltage is fully collected, the power output voltage is reduced by the duty cycle of the power drive unit. For example, when the battery voltage is detected to drop below 80%, the MCU drives the duty cycle to slowly increase the reciprocating cycle to keep the battery voltage at 80% at all times. It can also be other controls, that is, it can be defined in advance in the preset duty cycle corresponding table to ensure the specificity of the power control. Further, refer to Figure 7 , Figure 7This is a waveform diagram of current control in the power control circuit of this application. During the entire control, a battery charging soft start strategy can also be adopted. Taking the solid line waveform (battery charging soft start strategy, the dotted line is a conventional strategy) as an example, the battery power is slowly increased when the power is started to avoid the occurrence of impact current, so as to protect the battery and extend the battery life. It is worth noting that the battery charging soft start strategy, such as Figure 7 This technology can reduce the impact of surge current on battery life and help extend the battery life. When the power is started, the power is increased slowly to avoid surge current to protect the battery and extend its life.

[0095] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the power control method of the present application. More simple transformations based on this technical concept are all within the protection scope of the present application.

[0096] This application also provides a control chip, please refer to Fig. 9 , the control chip comprises:

[0097] An acquisition module A10 is used to acquire power information of the power protection unit and determine a power control instruction according to the power information;

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

[0099] The power control circuit provided by the present application adopts the power control method in the above embodiment, which can solve the technical problem of how to solve the low accuracy of power control. Compared with the prior art, the beneficial effects of the power control circuit provided by the present application are the same as the beneficial effects of the power control method provided by the above embodiment, and other technical features in the power control circuit are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0100] The present application provides a vehicle, the vehicle comprising the above-mentioned power supply control circuit;

[0101] Wherein, the vehicle is used to execute the above-mentioned power supply control method.

[0102] The vehicle also 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, and the instructions are executed by the at least one processor so that the at least one processor can execute the power control method in the above-mentioned embodiment 1.

[0103] Reference below Fig.10, which shows a schematic diagram of a structure of a vehicle suitable for implementing the embodiment of the present application. The vehicle in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Fig.10 The vehicle shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0104] like Fig.10 As shown, the vehicle may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for vehicle operation are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following devices can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the vehicle to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a vehicle with various devices, it should be understood that it is not required to implement or have all the devices shown. More or fewer devices can be implemented or have alternatively.

[0105] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0106] The vehicle provided by the present application adopts the power control method in the above embodiment, which can solve the technical problem of how to solve the low accuracy of power control. Compared with the prior art, the beneficial effects of the vehicle provided by the present application are the same as the beneficial effects of the power control method provided by the above embodiment, and the other technical features in the vehicle are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0107] It should be understood that the various parts disclosed in this application can be implemented by 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 one or more embodiments or examples in a suitable manner.

[0108] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0109] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the power control method in the above-mentioned embodiment.

[0110] The computer-readable storage medium provided in the present 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: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution device, apparatus or component. 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 computer-readable storage medium may be included in the vehicle, or may exist independently without being installed in the vehicle.

[0112] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by a vehicle, the vehicle:

[0113] Acquiring power information of the power protection unit, and determining a power control instruction according to the power information;

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

[0115] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0116] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the device, method and computer program product according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based device that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0117] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0118] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned power control method, and can solve the technical problem of how to solve the low accuracy of power control. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the power control method provided in the above-mentioned embodiment, and will not be repeated here.

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

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

[0121] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A power control circuit, characterized in that: The power control circuit comprises: Control chip; A power protection unit, wherein a first end of the power protection unit is connected to an external power source, and a third end of the power protection unit is connected to a first end of the control chip; An isolation feedback unit, wherein a first end of the isolation feedback unit is connected to a fourth end of the power protection unit, a second end of the isolation feedback unit is connected to a second end of the control chip, and the isolation feedback unit is used to collect power information of the power protection unit; A power drive unit, wherein a first end of the power drive unit is connected to a second end of the power protection unit, a second end of the power drive unit is connected to a power supply device, and a third end of the power drive unit is connected to a third end of the control chip, wherein the control chip is used to determine a power control instruction based on the power information, and control the power drive unit based on the power control instruction to achieve power control.

2. The power control circuit according to claim 1, characterized in that: The first end of the control chip includes a first control end and a second control end, the power protection unit includes an input relay control subunit and an output relay control subunit, the first end of the input relay control subunit is connected to the first end of the output relay control subunit, the second end of the input relay control subunit is connected to the external power supply, the third end of the input relay control subunit is connected to the first control end, the second end of the output relay control subunit is connected to the first end of the power drive unit, and the third end of the output relay control subunit is connected to the second control end; Wherein, the input relay control subunit and the output relay control subunit are both composed of a level control circuit and a relay, the input end of the level control circuit is connected to the first control end or the second control end, the output end of the level control circuit is connected to the control end of the relay, the first end of the relay is connected to the first end of the other relays, the second end of the relay in the input relay control subunit is connected to the external power supply, and the second end of the relay in the output relay control subunit is connected to the first end of the power drive unit.

3. The power control circuit according to claim 1, characterized in that: The isolation feedback unit comprises: An isolation acquisition chip, wherein an input end of the isolation acquisition chip is connected to the fourth end of the power protection unit; An operational amplifier, wherein a first input terminal of the operational amplifier is connected to a first output terminal of the isolation acquisition chip, a second input terminal of the operational amplifier is connected to a second output terminal of the isolation acquisition chip, and an output terminal of the operational amplifier is connected to a second terminal of the control chip; Wherein, the fourth end of the power protection unit includes the first end of the power protection unit or the second end of the power protection unit.

4. The power control circuit according to claim 1, characterized in that: The third end of the control chip includes a first driving end, a second driving end, a first output end, and a second output end. The power driving unit includes a plurality of driving control subunits and output subunits. The driving control subunit includes a first driving control subunit, a second driving control subunit, and a third driving control subunit. The first output end is connected to the first input end of the output subunit, the second output end is connected to the second input end of the output subunit, the output end of the output subunit is connected to the power supply device, the first end of the first driving control subunit is connected to the second end of the power protection unit, the second end of the first driving control subunit is connected to the first driving end, the third end of the first driving control subunit is connected to the first output end, the first end of the second driving control subunit is connected to the first output end, the second end of the second driving control subunit is connected to the second driving end, the third end of the second driving control subunit is connected to the third end of the third driving control subunit and then grounded, the first end of the third driving control subunit is connected to the first output end, and the driving control subunit includes: An input circuit, wherein an input end of the input circuit serves as a second end of the drive control subunit; A driving switch tube, wherein the first end of the driving switch tube serves as the first end of the driving control subunit, the second end of the driving switch tube serves as the third end of the driving control subunit, and the third end of the driving switch tube is connected to the output end of the input circuit.

5. The power control circuit according to any one of claims 1 to 4, characterized in that: The power control circuit includes an isolated power supply unit, and the isolated power supply unit includes: a power supply diode, wherein an anode of the power supply diode is connected to the external power supply; An isolation power supply chip, wherein the input end of the isolation power supply chip is connected to the cathode of the power supply diode, and the output end of the isolation power supply chip is connected to the power supply end of the control chip.

6. The power control circuit according to any one of claims 1 to 4, characterized in that: The power control circuit includes a communication unit, and the communication unit includes: A communication transceiver chip, wherein the input end of the communication transceiver chip is connected to the communication end of the control chip, and the output end of the communication transceiver chip is connected to an external communication terminal.

7. A power control method, characterized in that: The power control method is applied to the power control circuit according to any one of claims 1 to 6, and the power control method comprises: Acquiring power information of the power protection unit, and determining a power control instruction according to the power information; The power drive unit is controlled according to the power control instruction to achieve power control.

8. The power control method according to claim 7, characterized in that: The power information includes a voltage value and a current value, and the step of determining a power control instruction according to the power information includes: When the voltage value satisfies a preset voltage threshold and the current value satisfies a preset current threshold, generating a drive enable signal; The power supply state of the power supply device under the control of the drive enable signal is obtained, and the power supply state is stored in the power supply control instruction.

9. The power control method according to claim 7, characterized in that: The step of controlling the power drive unit according to the power control instruction includes: Determine the power supply state in the power control instruction, and determine the target duty cycle corresponding to the power supply state in a preset duty cycle corresponding table; The driving switch tube in the power driving unit is driven and controlled based on the target duty cycle.

10. A vehicle, characterized in that: The vehicle comprises a power supply control circuit as claimed in any one of claims 1 to 6; Wherein, the vehicle is used to execute the power supply control method as described in any one of claims 7 to 9.

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