Car wake-up control circuit and electric car

Abstract

The present invention discloses a car wake-up control circuit and an electric car. The circuit includes a main control chip, a power chip, a plug-in gun wake-up circuit, a timing wake-up circuit, a signal inversion circuit, a signal conversion circuit and a rising edge latch circuit; the signal inversion circuit is connected to the CC2 circuit of the power battery and the charging gun, and is used to invert the CC2 signal input by the CC2 circuit to obtain the inversion signal; the signal conversion circuit is connected to the signal inversion circuit, and is used to convert the inversion signal into a square wave signal; the rising edge latch circuit is connected to the signal conversion circuit and the main control chip, and is used to convert the square wave signal into a rising edge latch signal; the main control chip is connected to the signal inversion circuit, the rising edge latch circuit and the power chip, and is used to determine the target wake-up source according to the CC2 signal, the rising edge latch signal and the rising edge wake-up signal, and execute the wake-up processing logic corresponding to the target wake-up source. The circuit can accurately determine the target wake-up source and ensure the effective execution of the wake-up processing logic.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile electronic circuits, and in particular to an automobile wake-up control circuit and an electric vehicle. Background Art

[0002] Currently, electric vehicles are equipped with a power battery and a battery management system connected to the power battery. The power chip of the battery management system is equipped with two types of wake-up pins: a level wake-up pin and a rising edge wake-up pin, and there is only one wake-up pin of each type. In the process of designing the automobile wake-up control circuit, the same type of wake-up source needs to be connected in parallel to a wake-up pin. After the power chip is awakened, the main control chip needs to be awakened. In the case of multiple wake-up sources, the battery management system can only identify two types of wake-up sources, and the specific wake-up source can only be determined by judging the voltage state of each wake-up source through software and hardware.

[0003] After charging is completed, electric vehicles will sleep in the plugged-in state, that is, they will enter the plugged-in sleep state; if the battery management system is awakened at a scheduled time in the plugged-in sleep state, the battery management system will simultaneously identify the wake-up signal sent by the plugged-in wake-up source and the scheduled wake-up source RTC through the rising edge wake-up pin. If in the case of scheduled wake-up, the main control chip controls the electric vehicle to process according to the plug-in wake-up logic, which will cause the whole vehicle network to wake up and consume the power battery power. It is necessary to reset the scheduled wake-up time and increase the power battery power consumption frequency, thereby causing the power battery to feed; if in the case of plug-in wake-up, please pass the chip according to the scheduled wake-up source RTC logic, which will cause the whole vehicle network to not wake up, causing users to mistakenly believe that there is a problem with the electric vehicle charging process, reducing the user experience. Summary of the invention

[0004] The present invention provides an automobile wake-up control circuit and an electric car, so as to solve the problem of power battery feeding or failure to wake up the whole vehicle network in time due to failure to accurately determine the wake-up source of the power battery.

[0005] The present invention provides a car wake-up control circuit, comprising a main control chip, a power chip connected to the main control chip, a gun plug wake-up circuit and a timing wake-up circuit connected to a rising edge wake-up pin of the power chip; the power chip sends a rising edge wake-up signal to the main control chip; the car wake-up control circuit also includes a signal inversion circuit, a signal conversion circuit and a rising edge latch circuit;

[0006] The signal inversion circuit is connected to the CC2 circuit of the power battery and the charging gun, and is used to invert the CC2 signal input by the CC2 circuit to obtain an inverted signal;

[0007] The signal conversion circuit is connected to the signal inversion circuit and is used to convert the inversion signal into a square wave signal;

[0008] The gun plug wake-up circuit is connected to the signal conversion circuit and is used to form the gun plug wake-up signal based on the square wave signal;

[0009] The rising edge latch circuit is connected to the signal conversion circuit and the main control chip, and is used to convert the square wave signal into a rising edge latch signal, and send the rising edge latch signal to the main control chip;

[0010] The main control chip is connected to the signal inversion circuit, the rising edge latch circuit and the power chip, and is used to determine the target wake-up source according to the CC2 signal, the rising edge latch signal and the rising edge wake-up signal, and execute the wake-up processing logic corresponding to the target wake-up source.

[0011] Preferably, the automobile wake-up control circuit further includes a voltage discharge circuit, and the voltage discharge circuit is arranged between the signal inversion circuit and the signal conversion circuit to realize voltage discharge.

[0012] Preferably, the signal inversion circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor and an inversion transistor;

[0013] One end of the first resistor is connected to the power battery, and the other end is connected to the CC2 circuit and the second resistor;

[0014] One end of the second resistor is connected to the first resistor and the CC2 circuit, and the other end is connected to the first end of the barring transistor;

[0015] One end of the third resistor is connected to the first end of the barring transistor, and the other end is connected to the third end of the barring transistor;

[0016] One end of the fourth resistor is connected to the power battery, and the other end is connected to the second end of the barring transistor and the voltage discharge circuit;

[0017] The first end of the barring transistor is connected to the second resistor and the third resistor, the second end is connected to the fourth resistor and the voltage discharge circuit, and the third end is connected to the third resistor.

[0018] Preferably, the voltage discharge circuit comprises a discharge capacitor, a fifth resistor and a first diode;

[0019] One end of the discharge capacitor is connected to a connection node between the fourth resistor and the second end of the barring transistor, and the other end is connected to a connection node between the cathode of the first diode and the signal conversion circuit;

[0020] The positive electrode of the first diode is connected to the fifth resistor, and the negative electrode is connected to the discharge capacitor;

[0021] One end of the fifth resistor is connected to the third end of the barring transistor, and the other end is connected to the anode of the first diode.

[0022] Preferably, the signal conversion circuit comprises a sixth resistor, a seventh resistor, an eighth resistor, a first transistor and a second transistor;

[0023] The first end of the first transistor is connected to the voltage discharge circuit and the sixth resistor, the second end is connected to the eighth resistor, and the third end is connected to the sixth resistor and the ground terminal;

[0024] The first end of the second transistor is connected to the seventh resistor and the eighth resistor, the second end is connected to the gun plug wake-up circuit and the rising edge latch circuit, and the third end is connected to the power battery;

[0025] One end of the sixth resistor is connected to the first end of the first transistor, and the other end is connected to the third end of the first transistor;

[0026] One end of the seventh resistor is connected to the power battery, and the other end is connected to the eighth resistor and the first end of the second transistor;

[0027] One end of the eighth resistor is connected to the third end of the first transistor, and the other end of the eighth resistor is connected to the seventh resistor and the first end of the second transistor.

[0028] Preferably, the rising edge latch circuit comprises a ninth resistor, a tenth resistor and an operational amplifier;

[0029] One end of the ninth resistor is connected to the signal conversion circuit, and the other end is connected to the operational amplifier;

[0030] One end of the tenth resistor is connected to the reference voltage source, and the other end is connected to the operational amplifier;

[0031] The first input terminal of the operational amplifier is connected to the ninth resistor, the second input terminal is connected to the tenth resistor, and the signal output terminal is connected to the main control chip.

[0032] Preferably, the gun plug wake-up circuit comprises an eleventh resistor, a twelfth resistor and a second diode;

[0033] One end of the eleventh resistor is connected to the signal conversion circuit, and the other end is connected to the anode of the second diode;

[0034] One end of the twelfth resistor is connected to the connection node between the signal conversion circuit and the eleventh resistor, and the other end is connected to the ground end;

[0035] The anode of the second diode is connected to the eleventh resistor, and the cathode is connected to the rising edge wake-up pin of the power chip.

[0036] Preferably, the timed wake-up circuit comprises a thirteenth resistor and a third diode;

[0037] One end of the thirteenth resistor is connected to the timing wake-up source RTC, and the other end is connected to the anode of the third diode;

[0038] The anode of the third diode is connected to the thirteenth resistor, and the other end is connected to the rising edge wake-up pin of the power chip.

[0039] Preferably, the main control chip is used to determine the gun insertion wake-up source as the target wake-up source when the CC2 signal is a low level signal and the rising edge latch signal is a high level signal; and to determine the timing wake-up source as the target wake-up source when the CC2 signal is a low level signal, the rising edge latch signal is a low level signal and the rising edge wake-up signal is a timing wake-up signal.

[0040] The present invention provides an electric vehicle, comprising the above-mentioned vehicle wake-up control circuit.

[0041] The above-mentioned car wake-up control circuit and electric car use a signal inversion circuit to invert the CC2 signal input by the CC2 circuit, so as to ensure that when the charging gun is inserted into the charging socket, the inverted signal formed can wake up the power chip; use a signal conversion circuit to convert the inverted signal into a square wave signal to ensure that when the power chip is awakened based on the square wave signal, the power chip does not exclude the awakening of other wake-up sources; use a rising edge latch circuit to perform rising edge latching on the square wave signal to form a rising edge latch signal, so that the main control chip determines the accurate target wake-up source according to the detected CC2 signal, the rising edge latch signal and the rising edge wake-up signal, and ensures the effectiveness of the execution of the wake-up processing logic corresponding to the target wake-up source, and avoids the problem of power battery feeding or failure to wake up the entire vehicle network due to the inability to accurately identify the target wake-up source. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0043] Figure 1 is a circuit diagram of a car wake-up control circuit in one embodiment of the present invention;

[0044] Figure 2 1 is another circuit diagram of the automobile wake-up control circuit in one embodiment of the present invention.

[0045] In the figure: 11, main control chip; 12, power chip; 13, gun plug wake-up circuit; 14, timer wake-up circuit; 15, signal inversion circuit; 16, signal conversion circuit; 17, rising edge latch circuit; 18, voltage discharge circuit; 21, CC2 circuit. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be understood that the present invention can be implemented in different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, providing these embodiments will make the disclosure thorough and complete and fully convey the scope of the present invention to those skilled in the art. In the accompanying drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity. The same reference numerals throughout represent the same elements.

[0048] It should be understood that when an element or layer is referred to as being "on, adjacent to, connected to or coupled to other elements or layers, it may be directly on, adjacent to, connected to or coupled to other elements or layers, or there may be intervening elements or layers. In contrast, when an element is referred to as being "directly on, directly adjacent to, directly connected to or directly coupled to other elements or layers, there may be no intervening elements or layers. It should be understood that, although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present invention, the first element, component, region, layer or part discussed below may be represented as a second element, component, region, layer or part.

[0049] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein for ease of description to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that the spatially relative terms are intended to include different orientations of the device in use and operation in addition to the orientations shown in the figures. For example, if the device in the accompanying drawings is flipped, then the elements or features described as "under other elements" or "under" or "under" will be oriented as "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0050] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present invention. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0051] In order to fully understand the present invention, detailed structures and steps will be presented in the following description to illustrate the technical solutions proposed by the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0052] An embodiment of the present invention provides a car wake-up control circuit. The car wake-up control circuit can be arranged on an electric car and can be connected to a power battery Batt on the electric car. The power battery Batt is specifically a storage battery on the electric car, including but not limited to a lithium battery.

[0053] Figure 1 This is a schematic diagram of the car wake-up control circuit during the gun-insertion wake-up process. Figure 2 This is a schematic diagram of the car wake-up control circuit in the plug-in dormant state after it is fully charged. Figure 1 and Figure 2 As shown, the car wake-up control circuit includes a main control chip 11, a power chip 12 connected to the main control chip 11, a gun plug wake-up circuit 13 connected to the rising edge wake-up pin of the power chip 12, and a timing wake-up circuit 14; the power chip 12 sends a rising edge wake-up signal ENA to the main control chip 11;

[0054] The automobile wake-up control circuit further includes a signal inversion circuit 15, a signal conversion circuit 16 and a rising edge latch circuit 17;

[0055] The signal inversion circuit 15 is connected to the power battery Batt and the CC2 circuit 21 of the charging gun, and is used to invert the CC2 signal input by the CC2 circuit 21 to obtain an inversion signal;

[0056] The signal conversion circuit 16 is connected to the signal inversion circuit 15 and is used to convert the inversion signal into a square wave signal;

[0057] The rising edge latch circuit 17 is connected to the signal conversion circuit 16 and the main control chip 11, and is used to convert the square wave signal into a rising edge latch signal IO, and send the rising edge latch signal IO to the main control chip 11;

[0058] The main control chip 11 is connected to the signal inversion circuit 15, the rising edge latch circuit 17 and the power chip 12, and is used to determine the target wake-up source according to the CC2 signal, the rising edge latch signal IO and the rising edge wake-up signal ENA, and execute the wake-up processing logic corresponding to the target wake-up source.

[0059] Among them, the CC2 circuit 21 of the charging gun is a circuit set in the charging gun. Generally speaking, the CC2 circuit 21 in the charging gun includes a gun internal resistor R0 and a gun plug switch S. One end of the gun internal resistor R0 is connected to the ground terminal GND in the charging gun, and the other end is connected to the gun plug switch S; one end of the gun plug switch S is connected to the gun internal resistor R0, and the other end is used to connect to the signal inversion circuit 15 in the vehicle wake-up control circuit when the charging gun is inserted into the charging socket of the electric vehicle. The CC2 signal refers to the signal formed when the charging gun is inserted into the charging socket.

[0060] Generally speaking, the automobile wake-up control circuit includes a main control chip 11, a power chip 12 connected to the main control chip 11, a gun plug-in wake-up circuit 13 connected to the rising edge wake-up pin of the power chip 12, and a timing wake-up circuit 14; the power chip 12 is awakened when receiving a gun plug-in wake-up signal from the gun plug-in wake-up circuit 13 and / or a timing wake-up signal from the timing wake-up circuit 14, and sends a rising edge wake-up signal ENA to the main control chip 11. That is, the power chip 12 can be awakened after receiving a gun plug-in wake-up signal input by the gun plug-in wake-up source through the gun plug-in wake-up circuit 13, and / or receiving a rising edge wake-up signal ENA such as a timing wake-up signal input by the timing wake-up source RTC through the timing wake-up circuit 14, and sends the rising edge wake-up signal ENA to the main control chip 11 to wake up the main control chip 11. After the main control chip 11 is awakened by the rising edge wake-up signal ENA, it is necessary to determine the target wake-up source corresponding to the rising edge wake-up signal ENA, so as to execute the wake-up processing logic corresponding to the target wake-up source; in this example, if the main control chip 11 cannot accurately identify the gun plug wake-up source and the timing wake-up source RTC, it will cause the problem of Batt power feeding of the power battery due to the wake-up processing logic corresponding to the gun plug wake-up source being processed when the timing wake-up source RTC is awakened; or it will cause the problem of the whole vehicle network not being awakened due to the wake-up processing logic corresponding to the timing wake-up source RTC being processed when the gun plug wake-up source is awakened.

[0061] The signal inversion circuit 15 is a circuit for inverting the CC2 signal, that is, for converting a high-level CC2 signal into a low-level inverted signal, or converting a low-level CC2 signal into a high-level inverted signal. The inverted signal is a signal formed after the CC2 signal is inverted.

[0062] In this example, when the charging gun is not inserted into the charging socket of the electric vehicle, the gun plug switch S is disconnected, and the voltage of the CC2 signal formed by the CC2 circuit 21 is the voltage of the power battery Batt. At this time, the CC2 signal is a high-level signal; when the charging gun is inserted into the charging socket of the electric vehicle, the gun plug switch S is closed, and the voltage of the CC2 signal formed by the CC2 circuit 21 drops. At this time, the CC2 signal is a low-level signal. Since the gun plug wake-up source is a rising edge wake-up source, when the gun plug switch S is closed, the CC2 signal formed by the CC2 circuit 21 is a low-level signal, and it is impossible to form a rising edge wake-up signal. Therefore, it is necessary to use a signal inversion circuit 15 to invert the CC2 signal to convert the low-level signal into a high-level signal (i.e., an inverted signal), thereby achieving the purpose of rising edge wake-up.

[0063] In this example, the power chip 12 has only one rising edge wake-up pin, and all rising edge wake-up sources are connected in parallel to the same rising edge wake-up pin. In order to prevent the charging gun from being inserted into the charging socket, that is, when the gun plug switch S is closed, the gun plug wake-up source always occupies the rising edge wake-up pin, which causes other rising edge wake-up pins (including but not limited to the timing wake-up source RTC) to fail to wake up the power chip 12. Therefore, it is necessary to use a signal conversion circuit 16 connected to the signal inversion circuit 15 to convert the inversion signal output by the signal inversion circuit 15 to convert the high-level signal into a square wave signal, so that the square wave signal is different from the rising edge wake-up signal ENA formed by other rising edge wake-up sources, so as to wake up the power chip 12 based on the square wave signal, so that when the gun plug switch S is closed, other rising edge wake-up sources can also wake up the power chip 12.

[0064] In this example, the gun plug wake-up circuit 13 is connected to the signal conversion circuit 16 and the rising edge wake-up pin of the power chip 12, and can form a gun plug wake-up signal based on the square wave signal, and then send the gun plug wake-up signal to the power chip 12 to wake up the power chip 12. After the power chip 12 is awakened, a rising edge wake-up signal ENA can be sent to the main control chip 11, so that the rising edge wake-up signal ENA can wake up the main control chip 11.

[0065] In this example, in order to avoid input interference from other wake-up sources, a rising edge latch circuit 17 connected to the signal conversion circuit 16 can be used to perform rising edge latching on the square wave signal output by the signal conversion circuit 16 to form a rising edge latch signal IO, so as to determine whether it is a signal formed by the current gun insertion wake-up based on the rising edge latch signal IO.

[0066] In a specific implementation, the main control chip 11 is used to determine the gun plug wake-up source as the target wake-up source when the CC2 signal is a low level signal and the rising edge latch signal IO is a high level signal; when the CC2 signal is a low level signal, the rising edge latch signal IO is a low level signal and the rising edge wake-up signal ENA is a timed wake-up signal, determine the timed wake-up source as the target wake-up source.

[0067] For example, the main control chip 11 is connected to the signal inversion circuit 15, the rising edge latch circuit 17 and the power chip 12, and can be awakened under the control of the rising edge wake-up signal ENA of the power chip 12. When the main control chip 11 is awakened and initialized, the CC2 signal received by the signal inversion circuit 15 and the rising edge latch signal IO output by the rising edge latch circuit 17 can be sampled and detected. According to the rising edge wake-up signal ENA, the CC2 signal and the rising edge latch signal IO, the target wake-up source of this wake-up is determined, and then the wake-up processing logic corresponding to the target wake-up source is executed.

[0068] For another example, when the main control chip 11 samples and detects that the CC2 signal is a low-level signal and the rising edge latch signal IO is a high-level signal, even if the rising edge wake-up signal ENA is detected to include a timed wake-up signal, the target wake-up source can be identified as a gun plug wake-up source. For another example, when the main control chip 11 samples and detects that the CC2 signal is a low-level signal and the rising edge latch signal IO is a low-level signal, the rising edge wake-up signal ENA is detected to include a timed wake-up signal, and the target wake-up source is identified as a timed wake-up source RTC.

[0069] In the automobile wake-up control circuit provided in this embodiment, a signal inversion circuit 15 is used to invert the CC2 signal input by the CC2 circuit 21 to ensure that when the charging gun is inserted into the charging socket, the inverted signal formed can wake up the power chip 12; a signal conversion circuit 16 is used to convert the inverted signal into a square wave signal to ensure that when the power chip 12 is woken up based on the square wave signal, the power chip 12 does not exclude the wake-up of other wake-up sources; a rising edge latch circuit 17 is used to perform rising edge latching on the square wave signal to form a rising edge latch signal IO, so that the main control chip 11 determines the accurate target wake-up source according to the detected CC2 signal, the rising edge latch signal IO and the rising edge wake-up signal ENA, to ensure the execution validity of the wake-up processing logic corresponding to the target wake-up source, and avoid the problem of Batt feeding of the power battery or failure to wake up the vehicle network due to the inability to accurately identify the target wake-up source.

[0070] In one embodiment, if Figure 1 and Figure 2 As shown, the automobile wake-up control circuit further includes a voltage discharge circuit 18 , which is arranged between the signal inversion circuit 15 and the signal conversion circuit 16 for realizing voltage discharge.

[0071] In this example, during the quick plugging and unplugging process of the charging gun, that is, the quick disconnection or closing process of the gun switch S, the voltage in the car wake-up control circuit is not discharged, which may easily lead to the inability to accurately identify the CC2 signal. Therefore, a voltage discharge circuit 18 needs to be set between the signal inversion circuit 15 and the signal conversion circuit 16. One end of the voltage discharge circuit 18 is connected to the signal inversion circuit 15, and the other end is connected to the signal conversion circuit 16. The voltage can be quickly discharged during the quick plugging and unplugging of the charging gun to ensure that the car wake-up control circuit can accurately identify the CC2 signal.

[0072] In one embodiment, if Figure 1 and Figure 2 As shown, the signal inversion circuit 15 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and an inversion transistor Q3;

[0073] One end of the first resistor R1 is connected to the power battery Batt, and the other end is connected to the CC2 circuit 21 and the second resistor R2;

[0074] One end of the second resistor R2 is connected to the first resistor R1 and the CC2 circuit 21, and the other end is connected to the first end of the barring transistor Q3;

[0075] One end of the third resistor R3 is connected to the first end of the barring transistor Q3, and the other end is connected to the third end of the barring transistor Q3;

[0076] One end of the fourth resistor R4 is connected to the power battery Batt, and the other end is connected to the second end of the barring transistor Q3 and the voltage discharge circuit 18;

[0077] The first end of the barring transistor Q3 is connected to the second resistor R2 and the third resistor R3 , the second end is connected to the fourth resistor R4 and the voltage discharge circuit 18 , and the third end is connected to the third resistor R3 .

[0078] The first resistor R1 , the second resistor R2 , the third resistor R3 and the fourth resistor R4 can play a role of voltage division.

[0079] As an example, when the charging gun is not inserted into the charging socket of the electric vehicle, the gun plug switch S is disconnected, and the voltage of the CC2 signal formed by the CC2 circuit 21 is the voltage of the power battery Batt, that is, the CC2 signal is a high-level signal. At this time, the inversion transistor Q3 is turned on, and the power battery Batt is connected to the ground terminal GND through the first resistor R1 and the inversion transistor Q3, so that the voltage of the connection node between the fourth resistor R4 and the inversion transistor Q3 is reduced, so that the inversion signal output by the signal inversion circuit 15 is a low-level signal. Correspondingly, when the charging gun is inserted into the charging socket of the electric vehicle, the gun plug switch S is closed, and the voltage of the CC2 signal formed by the CC2 circuit 21 drops, that is, the CC2 signal is a high-level signal converted to a low-level signal. At this time, the inversion transistor Q3 is turned off, and the power battery Batt is discharged to the voltage discharge circuit 18 through the fourth resistor R4. At this time, the voltage between the second end of the inversion transistor Q3 and the connection node of the fourth resistor R4 is the voltage of the power battery Batt, that is, the inversion signal output by the signal inversion circuit 15 is a high-level signal, so as to achieve the signal inversion effect.

[0080] The counter transistor Q3 is a MOS tube, so that the counter transistor Q3 has the characteristics of higher power and better performance. As an example, the counter transistor Q3 is an N-MOS tube, the first end of the counter transistor Q3 is the gate of the N-MOS tube, the second end of the counter transistor Q3 is the drain of the N-MOS tube, and the third end of the counter transistor Q3 is the source of the N-MOS tube.

[0081] In one embodiment, if Figure 1and Figure 2 As shown, the voltage discharge circuit 18 includes a discharge capacitor C1, a fifth resistor R5 and a first diode D1;

[0082] One end of the discharge capacitor C1 is connected to a connection node between the fourth resistor R4 and the second end of the barring transistor Q3, and the other end is connected to a connection node between the cathode of the first diode D1 and the signal conversion circuit 16;

[0083] The anode of the first diode D1 is connected to the fifth resistor R5, and the cathode is connected to the discharge capacitor C1;

[0084] One end of the fifth resistor R5 is connected to the third end of the barring transistor Q3 , and the other end of the fifth resistor R5 is connected to the anode of the first diode D1 .

[0085] As an example, when the CC2 signal is a low-level signal, the inverting transistor Q3 is turned off, so that the voltage of the connection node between the fourth resistor R4 and the inverting transistor Q3 is a high-level voltage. At this time, the power battery Batt charges the discharge capacitor C1 through the fourth resistor R4, and outputs an inverting signal to the signal conversion circuit 16. After the charging is completed, when the charging gun is unplugged from the charging socket, the CC2 signal is a high-level signal, the inverting transistor Q3 is turned on, and the voltage discharge circuit 18 formed by the discharge capacitor C1, the inverting transistor Q3, the fifth resistor R5 and the first diode D1 can quickly discharge the voltage of the discharge capacitor C1 to avoid the voltage of the discharge capacitor C1 not being discharged, resulting in the inability to accurately identify the CC2 signal, affecting the accuracy of the wake-up control of the vehicle wake-up control circuit.

[0086] In one embodiment, if Figure 1 and Figure 2 As shown, the signal conversion circuit 16 includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first transistor Q1 and a second transistor Q2;

[0087] The first transistor Q1 has a first terminal connected to the voltage discharge circuit 18 and the sixth resistor R6, a second terminal connected to the eighth resistor R8, and a third terminal connected to the sixth resistor R6 and the ground terminal GND;

[0088] The first end of the second transistor Q2 is connected to the seventh resistor R7 and the eighth resistor R8, the second end is connected to the gun plug wake-up circuit 13 and the rising edge latch circuit 17, and the third end is connected to the power battery Batt;

[0089] One end of the sixth resistor R6 is connected to the first end of the first transistor Q1, and the other end is connected to the third end of the first transistor Q1;

[0090] One end of the seventh resistor R7 is connected to the power battery Batt, and the other end is connected to the eighth resistor R8 and the first end of the second transistor Q2;

[0091] One end of the eighth resistor R8 is connected to the third end of the first transistor Q1 , and the other end of the eighth resistor R8 is connected to the seventh resistor R7 and the first end of the second transistor Q2 .

[0092] The sixth resistor R6, the seventh resistor R7 and the eighth resistor R8 can play a role of voltage division.

[0093] As an example, when the CC2 signal is a low-level signal, the inversion transistor Q3 is turned off, and the signal inversion circuit 15 outputs a high-level signal after signal inversion, that is, the power battery Batt charges the discharge capacitor C1 through the fourth resistor R4 and the sixth resistor R6, and the voltage drop generated on the sixth resistor R6 turns on the first transistor Q1 and the second transistor Q2, so that the signal conversion circuit 16 can form a square wave signal, and send the square wave signal to the gun plug wake-up circuit 13 and the rising edge latch circuit 17 connected to the second transistor Q2, so that the gun plug wake-up circuit 13 can form a gun plug wake-up signal based on the square wave signal to wake up the power chip 12; and the rising edge latch circuit 17 can perform rising edge latching on the square wave signal to form a rising edge latch signal IO, which is a high-level signal, and sends the rising edge latch signal IO to the main control chip 11. After the power chip 12 is awakened by the wake-up signal input by the rising edge wake-up pin (including the gun plug wake-up signal output by the gun plug wake-up circuit 13 and the timing wake-up signal output by the timing wake-up signal), the main control chip 11 detects that the CC2 signal is a low-level signal during initialization sampling and the rising edge latch signal IO is a high-level signal. At this time, even if the timing wake-up signal is detected, its target wake-up source is determined to be the gun plug wake-up source.

[0094] In this example, when the CC2 signal is a low-level signal, the inversion transistor Q3 is turned off, and the signal inversion circuit 15 outputs a high-level signal after signal inversion, that is, the power battery Batt charges the discharge capacitor C1 through the fourth resistor R4 and the sixth resistor R6. After the discharge capacitor C1 is fully charged, the first transistor Q1 and the second transistor Q2 are turned off. At this time, the square wave signal output by the signal conversion circuit 16 is a low-level signal, so that the rising edge wake-up pin of the power chip 12 cannot receive the gun plug wake-up signal of the gun plug wake-up circuit 13. If the main control chip 11 requests power-off sleep, the power chip 12 sleeps. At this time, the charging gun is still plugged into the charging socket, and the rising edge latch signal IO output by the rising edge latch circuit 17 is a low-level signal. That is, after the discharge capacitor C1 is fully charged, as long as the charging gun is still plugged into the charging socket, if the power chip 12 is awakened by the timed wake-up signal sent by the timed wake-up circuit 14, the power chip 12 satisfies the main control chip 11, and the main control chip 11 initializes sampling and detects that the CC2 signal is a low-level signal, and the rising edge latch signal IO output by the rising edge latch circuit 17 is a low-level signal. If the timed wake-up signal is detected at the same time, the target wake-up source is determined to be the timed wake-up source RTC.

[0095] In this example, the first transistor Q1 is a triode, and the first end of the first transistor Q1 is the substrate of the triode, that is, the substrate of the triode is connected to the voltage discharge circuit 18 and the sixth resistor R6, specifically connected to the discharge capacitor C1 of the voltage discharge circuit 18 and the sixth resistor R6; the second end of the first transistor Q1 is the collector of the triode, that is, the collector of the triode is connected to the eighth resistor R8; the third end of the first transistor Q1 is the emitter of the triode, that is, the emitter of the triode is connected to the sixth resistor R6 and the ground terminal GND.

[0096] In this example, the second transistor Q2 uses a MOS tube, so that the second transistor Q2 has the characteristics of high power and good performance. As an example, the second transistor Q2 is a P-MOS tube; the first end of the second transistor Q2 is the gate of the P-MOS tube, connected to the seventh resistor R7 and the eighth resistor R8; the second end of the second transistor Q2 is the drain of the P-MOS tube, connected to the gun plug wake-up circuit 13 and the rising edge latch circuit 17; the third end of the second transistor Q2 is the drain of the P-MOS tube, connected to the power battery Batt.

[0097] In one embodiment, the rising edge latch circuit 17 includes a ninth resistor R9, a tenth resistor R10 and an operational amplifier U1;

[0098] One end of the ninth resistor R9 is connected to the signal conversion circuit 16, and the other end is connected to the operational amplifier U1;

[0099] One end of the tenth resistor R10 is connected to the reference voltage source Vref, and the other end is connected to the operational amplifier U1;

[0100] The first input terminal of the operational amplifier U1 is connected to the ninth resistor R9 , the second input terminal is connected to the tenth resistor R10 , and the signal output terminal is connected to the main control chip 11 .

[0101] The ninth resistor R9 and the tenth resistor R10 play a role in current limiting, and can determine the signal level of the rising edge latch signal IO output by the operational amplifier U1.

[0102] In this example, the first input terminal of the operational amplifier U1 receives the square wave signal input by the signal conversion circuit 16, and the second input terminal receives the reference voltage input by the reference voltage source Vref, and performs voltage comparison, forms a rising edge latch signal IO according to the voltage comparison result, and sends the rising edge latch signal IO to the main control chip 11. Specifically, when the first transistor Q1 and the second transistor Q2 are turned on, the square wave signal output by the signal conversion circuit 16 is a high-level signal, which is compared with the reference voltage input by the reference voltage source Vref, and the output rising edge latch signal IO is a high-level signal; when the first transistor Q1 and the second transistor Q2 are turned off, the square wave signal output by the signal conversion circuit 16 is a low-level signal, which is compared with the reference voltage input by the reference voltage source Vref, and the output rising edge latch signal IO is a low-level signal.

[0103] In one embodiment, the gun insertion wake-up circuit 13 includes an eleventh resistor R11, a twelfth resistor R12 and a second diode D2;

[0104] One end of the eleventh resistor R11 is connected to the signal conversion circuit 16, and the other end is connected to the anode of the second diode D2;

[0105] One end of the twelfth resistor R12 is connected to the connection node between the signal conversion circuit 16 and the eleventh resistor R11, and the other end is connected to the ground terminal GND;

[0106] The anode of the second diode D2 is connected to the eleventh resistor R11 , and the cathode is connected to the rising edge wake-up pin of the power chip 12 .

[0107] The eleventh resistor R11 and the twelfth resistor R12 play a role of voltage division.

[0108] In this example, the anode of the second diode D2 is connected to the signal conversion circuit 16 through the eleventh resistor R11, and the cathode of the second diode D2 is connected to the rising edge wake-up pin of the power chip 12; when the square wave signal output by the signal conversion circuit 16 is a high-level signal, the second diode D2 is turned on, so that the gun plug wake-up circuit 13 can input the gun plug wake-up signal to the power chip 12, thereby waking up the power chip 12; when the square wave signal of the signal conversion circuit 16 is a low-level signal, the second diode D2 is not turned on, so that the gun plug wake-up circuit 13 does not input the gun plug wake-up signal to the power chip 12.

[0109] In one embodiment, the timer wake-up circuit 14 includes a thirteenth resistor R13 and a third diode D3;

[0110] One end of the thirteenth resistor R13 is connected to the timing wake-up source RTC, and the other end is connected to the anode of the third diode D3;

[0111] An anode of the third diode D3 is connected to the thirteenth resistor R13 , and the other end is connected to the rising edge wake-up pin of the power chip 12 .

[0112] The thirteenth resistor R13 plays a role of voltage division.

[0113] In this example, the anode of the third diode D3 is connected to the timed wake-up source RTC through the thirteenth resistor R13, and the cathode of the third diode D3 is connected to the rising edge wake-up pin of the power chip 12; when the timed wake-up source RTC outputs a high-level signal, the third diode D3 is turned on, and at this time, the timed wake-up circuit 14 inputs the timed wake-up signal to the power chip 12; when the timed wake-up circuit 14 outputs a low-level signal, the third diode D3 is not turned on, and at this time, the timed wake-up circuit 14 does not input the timed wake-up signal to the power chip 12.

[0114] An embodiment of the present invention provides an electric vehicle, comprising the vehicle wake-up control circuit of the above embodiment. A signal inversion circuit is used to invert the CC2 signal input to the CC2 circuit, ensuring that when the charging gun is inserted into the charging socket, the inverted signal formed can wake up the power chip; a signal conversion circuit is used to convert the inverted signal into a square wave signal, ensuring that when the power chip is awakened based on the square wave signal, the power chip does not exclude the awakening of other wake-up sources; a rising edge latch circuit is used to perform rising edge latching on the square wave signal to form a rising edge latch signal, so that the main control chip determines the accurate target wake-up source according to the detected CC2 signal, the rising edge latch signal and the rising edge wake-up signal, ensuring the execution validity of the wake-up processing logic corresponding to the target wake-up source, and avoiding the problem of power battery feeding or failure to wake up the vehicle network caused by the inability to accurately identify the target wake-up source.

[0115] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A car wake-up control circuit, comprising a main control chip, a power chip connected to the main control chip, a gun plug wake-up circuit connected to a rising edge wake-up pin of the power chip, and a timing wake-up circuit; the power chip sends a rising edge wake-up signal to the main control chip; characterized in that, The automobile wake-up control circuit also includes a signal inversion circuit, a signal conversion circuit and a rising edge latch circuit; The signal inversion circuit is connected to the CC2 circuit of the power battery and the charging gun, and is used to invert the CC2 signal input by the CC2 circuit to obtain an inverted signal; The signal conversion circuit is connected to the signal inversion circuit and is used to convert the inversion signal into a square wave signal; The rising edge latch circuit is connected to the signal conversion circuit and the main control chip, and is used to convert the square wave signal into a rising edge latch signal, and send the rising edge latch signal to the main control chip; The main control chip is connected to the signal negation circuit, the rising edge latch circuit and the power chip, and is used to determine the target wake-up source according to the CC2 signal, the rising edge latch signal and the rising edge wake-up signal, and execute the wake-up processing logic corresponding to the target wake-up source; The main control chip is used to determine the gun insertion wake-up source as the target wake-up source when the CC2 signal is a low-level signal and the rising edge latch signal is a high-level signal.

2. The automobile wake-up control circuit according to claim 1, characterized in that: The automobile wake-up control circuit further includes a voltage discharge circuit, which is arranged between the signal inversion circuit and the signal conversion circuit to realize voltage discharge.

3. The automobile wake-up control circuit according to claim 2, characterized in that: The signal inversion circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor and an inversion transistor; One end of the first resistor is connected to the power battery, and the other end is connected to the CC2 circuit and the second resistor; One end of the second resistor is connected to the first resistor and the CC2 circuit, and the other end is connected to the first end of the barring transistor; One end of the third resistor is connected to the first end of the barring transistor, and the other end is connected to the third end of the barring transistor; One end of the fourth resistor is connected to the power battery, and the other end is connected to the second end of the barring transistor and the voltage discharge circuit; The first end of the barring transistor is connected to the second resistor and the third resistor, the second end is connected to the fourth resistor and the voltage discharge circuit, and the third end is connected to the third resistor.

4. The automobile wake-up control circuit according to claim 3, characterized in that: The voltage discharge circuit includes a discharge capacitor, a fifth resistor and a first diode; One end of the discharge capacitor is connected to a connection node between the fourth resistor and the second end of the barring transistor, and the other end is connected to a connection node between the cathode of the first diode and the signal conversion circuit; The positive electrode of the first diode is connected to the fifth resistor, and the negative electrode is connected to the discharge capacitor; One end of the fifth resistor is connected to the third end of the barring transistor, and the other end is connected to the anode of the first diode.

5. The automobile wake-up control circuit as claimed in claim 3, characterized in that: The signal conversion circuit includes a sixth resistor, a seventh resistor, an eighth resistor, a first transistor and a second transistor; The first end of the first transistor is connected to the voltage discharge circuit and the sixth resistor, the second end is connected to the eighth resistor, and the third end is connected to the sixth resistor and the ground terminal; The first end of the second transistor is connected to the seventh resistor and the eighth resistor, the second end is connected to the gun plug wake-up circuit and the rising edge latch circuit, and the third end is connected to the power battery; One end of the sixth resistor is connected to the first end of the first transistor, and the other end is connected to the third end of the first transistor; One end of the seventh resistor is connected to the power battery, and the other end is connected to the eighth resistor and the first end of the second transistor; One end of the eighth resistor is connected to the third end of the first transistor, and the other end of the eighth resistor is connected to the seventh resistor and the first end of the second transistor.

6. The automobile wake-up control circuit according to claim 1, characterized in that: The rising edge latch circuit comprises a ninth resistor, a tenth resistor and an operational amplifier; One end of the ninth resistor is connected to the signal conversion circuit, and the other end is connected to the operational amplifier; One end of the tenth resistor is connected to the reference voltage source, and the other end is connected to the operational amplifier; The first input terminal of the operational amplifier is connected to the ninth resistor, the second input terminal is connected to the tenth resistor, and the signal output terminal is connected to the main control chip.

7. The automobile wake-up control circuit according to claim 1, characterized in that: The gun insertion wake-up circuit comprises an eleventh resistor, a twelfth resistor and a second diode; One end of the eleventh resistor is connected to the signal conversion circuit, and the other end is connected to the anode of the second diode; One end of the twelfth resistor is connected to the connection node between the signal conversion circuit and the eleventh resistor, and the other end is connected to the ground end; The anode of the second diode is connected to the eleventh resistor, and the cathode is connected to the rising edge wake-up pin of the power chip.

8. The automobile wake-up control circuit according to claim 1, characterized in that: The timing wake-up circuit includes a thirteenth resistor and a third diode; One end of the thirteenth resistor is connected to the timing wake-up source RTC, and the other end is connected to the anode of the third diode; The anode of the third diode is connected to the thirteenth resistor, and the other end is connected to the rising edge wake-up pin of the power chip.

9. The automobile wake-up control circuit according to claim 1, characterized in that: The main control chip is further configured to determine the timed wakeup source as the target wakeup source when the CC2 signal is a low level signal, the rising edge latch signal is a low level signal, and the rising edge wakeup signal is a timed wakeup signal.

10. An electric vehicle, characterized in that: The invention comprises the automobile wake-up control circuit as described in any one of claims 1 to 9.

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