CN109747474B

CN109747474B - Charging communication method, charging management equipment and charging equipment

Info

Publication number: CN109747474B
Application number: CN201910116524.XA
Authority: CN
Inventors: 郝天磊
Original assignee: NIO Co Ltd
Current assignee: NIO Co Ltd
Priority date: 2019-02-15
Filing date: 2019-02-15
Publication date: 2021-12-07
Anticipated expiration: 2039-02-15
Also published as: CN109747474A

Abstract

The invention relates to a charging communication method, a charging management device and a charging device. The charging communication method comprises the following steps: collecting a control guide signal; comparing the control pilot signal with a first voltage threshold value to obtain a first detection result, and comparing the control pilot signal with a second voltage threshold value to obtain a second detection result, wherein the second voltage threshold value is lower than the first voltage threshold value, there is an absolute value of an operating voltage amplitude or an operating voltage peak value of the control pilot signal between the first voltage threshold value and the second voltage threshold value, and there is an absolute value of an operating voltage amplitude or an operating voltage peak value of the control pilot signal lower than the second voltage threshold value and/or higher than the second voltage threshold value; and generating a first determination result in response to a combination of the first detection result and the second detection result, the first determination result indicating a state of the charging apparatus and/or the powered apparatus. The invention can realize accurate and efficient communication.

Description

Charging communication method, charging management equipment and charging equipment

Technical Field

The invention relates to a charging communication method, a charging management device and a charging device. And more particularly, to a mechanism that can rapidly resolve a device state according to a Control Pilot (CP).

Background

Electric energy is increasingly gaining importance as a clean energy source, and particularly in the field of vehicles, rechargeable automobiles become an option for future vehicles. Because high voltage such as commercial power needs to be used for supplementing electric energy for rechargeable vehicles such as rechargeable automobiles and the like, the safety of the vehicle is not negligible. As charging communication for connecting a charging device with a power receiving device such as a rechargeable automobile, accuracy and timeliness of the charging communication are the basis for ensuring charging safety, and therefore accurate and efficient communication is important.

More specifically, the system needs to communicably interpret this information and let the charging device disconnect the power output as soon as possible, for example, when an artificial charge interruption occurs or the powered device needs to stop charging. This time is limited to within 100 milliseconds in the chinese national standard GBT 18487.1-2015.

At present, the CPU or the MCU is widely used to analyze the control pilot signal cp (control pilot), analyze the voltage state thereof, and further determine the charging state. However, the AD sampling of the CPU or the MCU is often limited in performance and difficult to meet the time limit requirement of the national standard; the situation is even worse if there are multiple outputs. The use of an additional dedicated AD sampling chip is an option, but this implies additional overhead, which in turn increases the cost of the charging device and/or the charging system.

Disclosure of Invention

According to an aspect of the present invention, there is provided a charging communication method including the steps of:

collecting a control guide signal; comparing the control pilot signal with a first voltage threshold value, obtaining a first detection result, and comparing the control pilot signal with a second voltage threshold value, obtaining a second detection result, wherein the second voltage threshold value is lower than the first voltage threshold value, there is an absolute value of an operating voltage amplitude or an operating voltage peak of the control pilot signal between the first voltage threshold value and the second voltage threshold value, and there is an absolute value of an operating voltage amplitude or an operating voltage peak of the control pilot signal lower than the second voltage threshold value and/or higher than the second voltage threshold value; and

generating a first determination result indicating a state of a charging apparatus and/or a powered apparatus in response to a combination of the first detection result and the second detection result. Preferably, in the step of generating the first judgment result: the first determination result is generated in response to the first detection result and the second detection result at a first time, and in response to the first detection result and the second detection result at a second time.

According to an embodiment of the present disclosure, in the step of generating the first determination result:

if at the first time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold; and at the second time, the first detection result is that the control pilot signal is higher than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold; alternatively, the first and second electrodes may be,

if at the first time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is lower than the second voltage threshold; and at the second time, the first detection result is that the control pilot signal is higher than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold; then, the first determination result indicates that the charging apparatus and the powered apparatus have been in an electrically decoupled state between the first time and the second time;

and, the method further comprises the steps of: and based on the first judgment result, the charging equipment disconnects the electric energy output.

The charging communication method according to another embodiment of the present disclosure or any one of the foregoing embodiments, wherein, in the step of generating the first determination result: if at the first time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is lower than the second voltage threshold; and at the second time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold; then, the first determination result indicates that the powered device is in a state in which charging needs to be stopped between the first time and the second time; and, the method further comprises the steps of: and based on the first judgment result, the charging equipment disconnects the electric energy output.

The charging communication method according to another embodiment of the present disclosure or any one of the foregoing embodiments, further including: the control pilot signal is obtained by AD sampling and the first determination result is ignored, and a second determination result indicating a state of the charging apparatus and/or the power receiving apparatus is generated directly in response to the control pilot signal.

The charging communication method according to another embodiment of the present disclosure or any one of the foregoing embodiments, further including: the charging device disconnects the power output when the second determination result indicates that the powered device is in a state in which charging needs to be stopped, and/or when the second determination result indicates that the charging device and the powered device are already in an electrically decoupled state.

The charging communication method according to another embodiment of the present disclosure or any one of the foregoing embodiments, further including:

comparing the control pilot signal with a third voltage threshold to obtain a third detection result, wherein the third voltage threshold is lower than the second voltage threshold, and the third voltage threshold is close to 0V;

and generating a third judgment result in response to the third detection result, wherein when the third judgment result indicates that the control pilot signal wire is in a short-circuit state, the charging equipment disconnects the power output and the control pilot signal disconnects the output.

According to another aspect of the present invention, there is provided a charging apparatus including:

the acquisition module is used for acquiring the control guide signal;

a comparison module, including a first comparator for comparing the control pilot signal with a first voltage threshold and outputting a first detection result, and a second comparator for comparing the control pilot signal with a second voltage threshold and outputting a second detection result, wherein the second voltage threshold is lower than the first voltage threshold, an absolute value of an operating voltage amplitude or an operating voltage peak of the control pilot signal exists between the first voltage threshold and the second voltage threshold, and an absolute value of an operating voltage amplitude or an operating voltage peak of the control pilot signal exists lower than the second voltage threshold and/or higher than the second voltage threshold; and

a determination module for generating a first determination result in response to a combination of the first detection result and the second detection result, the first determination result indicating a state of a charging apparatus and/or a powered apparatus.

The charging device according to an embodiment of the present disclosure, wherein the control pilot signal is simultaneously connected to first input ports of the first comparator and the second comparator, the first voltage threshold is input to a second input port of the first comparator, and the second voltage threshold is input to a second input port of the second comparator.

The charging device according to another embodiment of the present disclosure or any one of the preceding embodiments, wherein the device further comprises: a transmitting module for transmitting a signal generated according to the state, the signal including an instruction instructing the charging device and/or the powered device to perform a corresponding action.

The charging device according to another embodiment of the present disclosure or any one of the preceding embodiments, wherein the comparing module is further configured to: the first determination result is generated in response to the first detection result and the second detection result at a first time, and in response to the first detection result and the second detection result at a second time.

The charging device according to another embodiment of the present disclosure or any one of the foregoing embodiments, wherein the determining module is further configured to:

if at the first time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold; at a second time, the first detection result is that the control pilot signal is higher than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold; alternatively, the first and second electrodes may be,

if at the first time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is lower than the second voltage threshold; at a second time, the first detection result is that the control pilot signal is higher than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold;

then, the first determination result indicates that the charging apparatus and the powered apparatus have been in an electrically decoupled state between the first time and the second time;

the sending module is further used for sending a signal which is generated according to the state and comprises an instruction that the charging equipment disconnects the power output.

The charging device according to another embodiment of the present disclosure or any one of the foregoing embodiments, wherein the determining module is further configured to: if at the first time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is lower than the second voltage threshold; and at the second time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold;

then, the first determination result indicates that the powered device is in a state in which charging needs to be stopped between the first time and the second time;

The charging device according to another embodiment of the present disclosure or any one of the preceding embodiments, wherein the comparing module further includes a third comparator, configured to compare the control pilot signal with a third voltage threshold and output a third detection result, wherein the third voltage threshold is lower than the second voltage threshold, and the third voltage threshold is close to 0V;

the judging module is further configured to: generating a third determination result in response to the third detection result;

the sending module is further configured to: and when the third judgment result indicates that the control pilot signal line is in a short circuit state, sending a signal which is generated according to the state and comprises a command for disconnecting the power output of the charging equipment and a command for disconnecting the output of the control pilot signal.

the acquisition module is used for acquiring the control guide signal;

a comparison module, including a first comparator for comparing the control pilot signal with a first voltage threshold and outputting a first detection result, and a second comparator for comparing the control pilot signal with a second voltage threshold and outputting a second detection result, wherein the second voltage threshold is lower than the first voltage threshold, an absolute value of an operating voltage amplitude or an operating voltage peak of the control pilot signal exists between the first voltage threshold and the second voltage threshold, and an absolute value of an operating voltage amplitude or an operating voltage peak of the control pilot signal exists lower than the second voltage threshold and/or higher than the second voltage threshold;

a determination module configured to generate a first determination result in response to a combination of the first detection result and the second detection result, the first determination result indicating a state of a charging apparatus and/or a powered apparatus; and an action module for executing a corresponding electrical action according to the state.

the action module is also used for executing the electric action of disconnecting the electric energy output of the charging equipment according to the state.

if at the first time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is lower than the second voltage threshold; and at the second time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold;

The charging device according to another embodiment of the present disclosure or any one of the previous embodiments, wherein the charging device further includes an AD sampling circuit to obtain the control pilot signal; wherein, ignoring the first determination result of the determination module, the AD sampling circuit generates a second determination result directly in response to the control pilot signal, the second determination result indicating a state of the charging apparatus and/or the power receiving apparatus.

The charging device according to another embodiment of the present disclosure or any one of the preceding embodiments, wherein the action module is further configured to: and when the second judgment result indicates that the powered device is in a state of needing to stop charging, and/or when the second judgment result indicates that the charging device and the powered device are already in an electrically decoupled state, executing an electrical action of disconnecting the power output by the charging device.

the judging module is further configured to: generating a third determination result in response to the third detection result; the action module is further to: and when the third judgment result indicates that the control guide signal wire is in a short circuit state, executing the electrical actions of disconnecting the power output of the charging equipment and disconnecting the power output of the control guide signal.

The above features and operation of the present invention will become more apparent from the following description and the accompanying drawings.

Drawings

The above and other objects and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which like or similar elements are designated by like reference numerals.

Fig. 1 is a schematic diagram of operating voltages according to an embodiment of the present invention.

Fig. 2 is a flowchart of a charging communication method according to an embodiment of the present invention.

Fig. 3 is a flowchart of a charging communication method according to an embodiment of the present invention.

Fig. 4 is a flowchart of a charging communication method according to an embodiment of the present invention.

Fig. 5 is a flowchart of a charging communication method according to an embodiment of the present invention.

Fig. 6 is a flowchart of a charging communication method according to an embodiment of the present invention.

Fig. 7 is a flowchart of a charging communication method according to an embodiment of the present invention.

Fig. 8 is a schematic diagram of a positional relationship of a charge management device according to an embodiment of the present invention.

Fig. 9 is a block diagram of a charge management device according to an embodiment of the present invention.

FIG. 10 is a block diagram of a comparison module in accordance with one embodiment of the present invention.

Fig. 11 is a schematic diagram of a communication path of a charge management device according to an embodiment of the invention.

Fig. 12 is a block diagram of a charging device according to an embodiment of the present invention.

Detailed Description

For the purposes of brevity and explanation, the principles of the present invention are described herein with reference primarily to exemplary embodiments thereof. However, those skilled in the art will readily recognize that the same principles are equally applicable to all types of charging communication methods, charging management devices, and charging devices, and that these same or similar principles may be implemented therein, with any such variations not departing from the true spirit and scope of the present patent application. Moreover, in the following description, reference is made to the accompanying drawings that illustrate certain exemplary embodiments. Electrical, logical, and structural changes may be made to these embodiments without departing from the spirit and scope of the invention. In addition, while a feature of the invention may have been disclosed with respect to only one of several implementations/embodiments, such feature may be combined with one or more other features of the other implementations/embodiments as may be desired and/or advantageous for any given or identified function. The following description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims and their equivalents.

The control pilot signal is a communication signal used between a powered device (such as a vehicle) and a charging device (such as a charging pile), and for example, the charging pile may output a pulse Width modulation (pwm) signal through the control pilot signal, so as to inform the vehicle of information such as a maximum output current of the charging pile at present; the vehicle can carry out the partial pressure with control pilot signal to through voltage to fill electric pile reflection vehicle and fill electric pile's the connection condition and the charged state. Thus, in general, the control pilot signal line carries an alias of the pwm signal and the voltage signal, the level of which is referred to as the operating voltage.

As shown in fig. 1, the charging pile recovers a high level voltage value based on the pwm signal. Referring to fig. 1, the recovered control pilot signal includes an operating voltage of stable amplitude of 9V, 12V and an operating voltage of a pulse width modulation signal of 6V, 9V in absolute value of maximum amplitude (peak value). U = 6V, V = 9V, W = 12V is defined in descending order. The conventional method utilizes an AD sampling circuit such as a CPU or an MCU device of the charging pile to acquire the control pilot signal, and further performs processing such as filtering. On the other hand, in order to ensure the accuracy and reliability of sampling, the AD sampling circuit needs to be adopted for multiple times to confirm the accuracy. The general performance of the AD sampling circuit of the CPU or MCU device of the charging pile is limited, and the sampling speed will be significantly deteriorated in a scenario where multiple outputs exist (for example, multiple vehicles need to be charged), and the analysis of the control pilot signal will be affected accordingly. If the control pilot signal carries information such as the user pulling out the charging gun, the current output of the charging gun should be cut off within 100ms according to the requirement, which is difficult to achieve in the above scenario. For another example, when the vehicle needs to stop charging (i.e., the S2 switch is turned off), the CPU or the MCU needs to acquire the signal on the premise of ensuring accuracy, and then the CPU or the MCU or other control components need to control the relay or the contactor to stop outputting, and then the relay or the contactor stops outputting after the time of reaction. This process takes a long time. On the other hand, in order to increase the sampling frequency, the load of the CPU or MCU or the like may significantly increase, possibly resulting in an unintended program failure. If an extra separate AD sampling circuit is used, this will result in increased costs, which is also invaluable. The voltage range interval of the control pilot signal can be directly determined by directly comparing the voltages, so that the specific voltage value of the control pilot signal does not need to be determined, and the specific voltage value of the control pilot signal needs to be determined by adopting AD sampling, so that the method is faster than the traditional AD sampling.

And the level of the control pilot signal itself includes information of the charging device (such as a charging pile) and the power receiving device (such as a power receiving vehicle). For example, when the acquired control pilot signal is detected to jump from 6V to 9V, the vehicle needs to stop charging; when the control pilot signal of gathering is detected and jumps from 9V to 12V or jumps from 6V directly to 12V, the user pulls out the rifle that charges from the vehicle. To above-mentioned two kinds of circumstances, fill electric pile and need break off electric energy output immediately to guarantee equipment and personnel's safety. If the above-mentioned signal jump is not detected, for example, the control pilot signal is acquired as a stable pwm signal with a maximum amplitude of 6V in absolute value, indicating that the vehicle is receiving charge.

Generally, the aliased control pilot signal includes at least three amplitudes of signals, and the three amplitudes of signals are distinguished to analyze a certain control pilot signal, and further analyze the status information indicating the charging device and the powered device according to the control pilot signal.

To distinguish between three amplitude signals as described above, two voltage thresholds are used to classify them in one embodiment. The threshold voltage for classification may be initially specified, e.g., a first voltage threshold V may be set_th1= 10.5V, thTwo voltage threshold V_th2= 7.5V. The above initially specified threshold values are for three amplitudes, 12V, 9V and 6V, and other threshold voltages may be specified accordingly for other voltage amplitudes (e.g., when the pilot signal is controlled to be other amplitudes). Generally, the initially specified voltage and the voltage amplitude to be classified need to be sorted by voltage size and staggered by intervals (e.g., 12V, 10.5V, 9V, 7.5V, 6V). As an initial specified example, the specified threshold may be an average value of the voltage magnitudes of both ends to be inserted therein (e.g., 10.5V = (12V + 9V)/2, 7.5V = (9V + 6V)/2), it being understood that other voltage values between both ends are also permitted as voltage thresholds.

In addition to initial assignment, the threshold voltage may be reassigned in an updated manner based on engineering experience or other requirements. Besides the initial designation, the threshold voltage can be updated by a machine learning method, so that the classification is more scientific and efficient. The classification threshold employed in a single machine can also be referenced by other single machines, such as by network sharing. The single machines may reassign the threshold voltage based on results of local machine learning and/or sharing by other single machines. The above scheme of updating the threshold voltage is applicable not only to fixed amplitude voltages but also to fluctuating amplitude voltages.

Taking the example of a signal controlling the presence of three amplitudes of the pilot signal, a single machine (charging device) may set two thresholds for classifying it. The results of the classification can be seen in table 1 (where grey indicates a measurement that should not be present, or a malfunction of the comparison circuit, the same applies below), where the first (voltage) threshold is higher than the second (voltage) threshold. In table 1, control pilot voltage amplitude above the threshold is denoted as "high (1)" and control pilot voltage amplitude below the threshold is denoted as "low (0)". Since there are two comparison criteria in total, 4 comparison results can be formed.

Table 1. control pilot signal status table (e.g., first voltage threshold = 10.5V, and second voltage threshold = 7.5V)

Further referring to the contents shown in table 1, if the detection result indicates that it is higher than both the first and second threshold values, the voltage of the control pilot signal may be a constant voltage such as 12V. At this time, the charging device and the power receiving device are not connected or are not effectively connected, and this determination result may be used as a determination condition for determining whether or not there is a disconnection in the control line.

If the detection result indicates that it is lower than the first threshold and the second threshold is higher, the voltage of the control pilot signal is between 10.5V and 7.5V, which may be a constant voltage such as 9V or a 9V PWM signal. This indicates that the charging device and the powered device have completed the first-stage connection.

If the detection result indicates a lower than both the first and second threshold values, the signal controlling the pilot line should be at least less than 7.5V. As an example, it may be a constant voltage such as 6V or a PWM signal of 6V. This indicates that the charging device and the powered device are connected in the second phase. The charging device and the power receiving device are performing efficient power transmission. As another example, if the signal of the control pilot line is 0V, the control pilot line is likely to be shorted at both ends or the middle portion, and the short may exist on one or more of the charging device, the powered device, and the signal line, and this determination result may be used as a condition for controlling the level protection of the pilot line.

If the detection result indicates that it is higher than the first threshold value and the second threshold value is lower, the comparison circuit is failed; or a fault occurs in an intermediate link from the comparison circuit to the one that produces the final judgment result.

Table 1 shows the results of measuring the control pilot signal on a single time scale, and if the measurements at least at time are taken into account, a state transition table as described in table 2 can be obtained.

Table 2. control pilot signal state change table (e.g., first voltage threshold = 10.5V, and second voltage threshold = 7.5V)

The confidence degree can be further increased for the measurement result by using the measurement at two moments, and the signal abnormality or the comparison result abnormality caused by signal interference and the like can be ignored. In addition, when the two moments are separated to the extent that the level jump can be detected, a more accurate judgment can be further made according to the signal state change.

Referring to table 3, a specific scheme for generating the determination of the state of the charging device and/or the powered device according to the voltage comparison at adjacent time is shown.

As an example, if both the first and second moments indicate that the voltage is below 7.5V, it may be a constant voltage such as 6V or a PWM signal of 6V, as an example. This indicates that the charging device and the powered device are continuously and efficiently delivering power.

Referring to fig. 2, the present invention provides a charging communication method, which includes the following steps: s202, collecting control guide signals; s204, comparing the control pilot signal with a first voltage threshold to obtain a first detection result, and comparing the control pilot signal with a second voltage threshold to obtain a second detection result, wherein the second voltage threshold is lower than the first voltage threshold, there is an absolute value of an operating voltage amplitude or an operating voltage peak of the control pilot signal between the first voltage threshold and the second voltage threshold, and there is an absolute value of an operating voltage amplitude or an operating voltage peak of the control pilot signal lower than the second voltage threshold and/or higher than the second voltage threshold; s206, generating a combination of first determination results indicating states of the charging apparatus and/or the power receiving apparatus in response to the first detection result and the second detection result.

Preferably, the first determination result is generated in response to the first detection result and the second detection result at the first timing, and in response to the first detection result and the second detection result at the second timing. As an example, referring to fig. 3, if at a first time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold (i.e., step S3042); and at a second time, the first detection result is that the control pilot signal is higher than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold (i.e. step S3044), then a transition from 9V to 12V is implemented from the first time to the second time; alternatively, referring to fig. 4, if at the first time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is lower than the second voltage threshold (i.e., step S4042); at a second time, the first detection result is that the pilot signal is higher than the first voltage threshold, and the second detection result is that the pilot signal is higher than the second voltage threshold (i.e., step S3044); then a jump of 6V to 12V is effected from the first moment to the second moment. The first determination result may further indicate that the charging device should be actively decoupled from the powered device (e.g., the charging gun is pulled out) between the first time and the second time (i.e., steps S3046 and S4046), and the charging device should be disconnected from the power output (i.e., steps S3048 and S4048) to ensure the safety of the personnel and the device.

As an example, referring to fig. 5, if at the first time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is lower than the second voltage threshold (i.e., step S5042); at a second time, the first detection result is that the pilot signal is lower than the first voltage threshold, and the second detection result is that the pilot signal is higher than the second voltage threshold (i.e., step S5044); therefore, the jump from 6V to 9V is realized from the first time to the second time; then, the first determination result indicates that the powered device needs to stop charging (e.g., the charging device completes charging) between the first time and the second time (i.e., step S5046), and the charging device should be disconnected from power output (i.e., step S5048) to ensure safety of personnel and equipment.

Further examples can be derived from table 3 below.

Table 3. status indication table (e.g., first voltage threshold = 10.5V, and second voltage threshold = 7.5V)

Although the above examples all resolve the state of the device by the first determination result. But the first determination result may be omitted, and as shown in fig. 6, the control pilot signal is obtained by AD sampling (i.e., step S606), and the second determination result is generated directly in response to the control pilot signal, so as to obtain the state of the charging apparatus and/or the powered apparatus. The generation of the first determination result and the second determination result is not limited in time sequence, and may be one generation before the other generation, or may be generated in parallel. Further, when the second determination result indicates that the powered device is in a state in which the charging needs to be stopped (i.e., step S608), the charging device turns off the power output (i.e., step S612); when the second determination result indicates that the charging apparatus and the powered apparatus are already in the electrically decoupled state (i.e., step S610), the charging apparatus disconnects the power output (i.e., step S614).

Additionally, if the detection result indicates that it is lower than both the first and second threshold values, the signal controlling the pilot signal line should be at least less than 7.5V. For example, it may be 0V or 6V. At this time, a threshold voltage V may be added_th3To further classify. For example, as shown in fig. 7, the control pilot signal is also compared with a third voltage threshold to obtain a third detection result (i.e., step S702), wherein the third voltage threshold V_th3Below a second voltage threshold V_th2And the third voltage threshold is close to 0V; and generating a third judgment result in response to the third detection result (i.e., step S704), wherein the third judgment result indicates that when the control pilot signal line is short-circuited, the charging device should be disconnected from the power output and the control pilot signal should be disconnected from the power output (i.e., step S706), so as to ensure the safety of the personnel and the equipment. Likewise, the determination of the third voltage threshold introduced can also be combined with the above time determination. The measurement at two moments can be used for further increasing the confidence coefficient of the measurement result, and the confidence coefficient caused by factors such as signal interference and the like can be ignoredAbnormal sign or abnormal comparison result. In addition, when the two moments are separated to the extent that the level jump can be detected, a more accurate judgment can be further made according to the signal state change.

It is anticipated that the respective tables 1, 2, 3 will be scaled up in synchronism if a third voltage threshold is introduced.

To achieve the object of the present invention, the present invention provides a charge management device. Referring to fig. 8, the charging management device 800 may be disposed at one side of the charging device 8001 or the power receiving device 8002, and included inside the charging device or the power receiving device; or between the two and external to the charging device or the powered device.

Referring to fig. 9, the charge management apparatus includes: an acquisition module 801 for acquiring control guide signals; a comparison module 802, the comparison module includes a first comparator 8021 and a second comparator 8022, the first comparator 8021 compares the control pilot signal with a first voltage threshold and outputs a first detection result, and the second comparator 8022 compares the control pilot signal, which is connected to the first input ports of the first comparator and the second comparator, with a second voltage threshold and outputs a second detection result, the first voltage being connected to the second input port of the first comparator and the second voltage being connected to the second input port of the second comparator, wherein the second voltage threshold is lower than the first voltage threshold, between which there is an absolute value of an operating voltage amplitude or an operating voltage peak of the control pilot signal, and there is an absolute value of the operating voltage amplitude or operating voltage peak of the control pilot signal below the second voltage threshold and/or above the second voltage threshold; a determining module 803, which generates a first determining result in response to a combination of the first and second detection results, the first determining result indicating a state of the charging apparatus and/or the powered apparatus. The comparator can directly determine the voltage range interval of the control pilot signal, so that the specific voltage value of the control pilot signal does not need to be determined, and the AD sampling needs to be adopted to determine the specific voltage value of the control pilot signal, so that the method is faster than the traditional AD sampling.

Referring to fig. 10, which shows a comparison module of two comparators, a first comparator compares a control pilot signal (CP signal) with a first voltage of 10.5V and outputs a first detection result, and a second comparator compares the control pilot signal (CP signal) with a second voltage of 7.5V and outputs a second detection result, the control pilot signal being connected to the "-" poles of the first and second comparators, the first voltage being connected to the "+" pole of the first comparator and the first voltage being connected to the "+" pole of the second comparator.

The charging management device may further include a transmitting module 804 that generates a signal including an instruction instructing the charging device and/or the powered device to perform a corresponding action according to the status.

The operation principle of the charge management device can be seen from table 1, and if the first comparator detection result indicates that it is lower than the first threshold value and the second comparator detection result indicates that it is higher than the second threshold value, the voltage of the control pilot signal is between 10.5V and 7.5V, which can be a constant voltage such as 9V or a PWM signal of 9V. This indicates that the charging device and the powered device have completed the first-stage connection. If the detection result indicates a lower than both the first and second threshold values, the signal controlling the pilot line should be at least less than 7.5V. As an example, it may be a constant voltage such as 6V or a PWM signal of 6V. This indicates that the charging device and the powered device are connected in the second phase. The charging device and the power receiving device are performing efficient power transmission. As another example, if the signal of the control pilot line is 0V, the control pilot line is likely to be shorted at both ends or the middle portion, and the short may exist on one or more of the charging device, the powered device, and the signal line, and this determination result may be used as a condition for controlling the level protection of the pilot line. If the detection result indicates that it is higher than the first threshold value and the second threshold value is lower, the comparison circuit is failed; or a fault occurs in an intermediate link from the comparison circuit to the one that produces the final judgment result.

The operation principle of the charging management device can be further seen in table 3, which shows a specific scheme for generating the determination of the state of the charging device and/or the powered device according to the voltage comparison of adjacent time instants. The comparison module generates a first judgment result in response to the first detection result and the second detection result at the first moment and in response to the first detection result and the second detection result at the second moment.

As an example, if the first and second moments in time both indicate a voltage below 7.5V, it may be a constant voltage such as 6V or a PWM signal of 6V, as an example. This indicates that the charging device and the powered device are continuously and efficiently delivering power.

As an example, if at a first time instant the first detection result is that the control pilot signal is below a first voltage threshold and the second detection result is that the control pilot signal is above a second voltage threshold; and at a second time instant, the first detection result is that the control pilot signal is higher than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold (transition of 9V to 12V); or, if at the first time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is lower than the second voltage threshold; and at a second time, the first detection result is that the control pilot signal is higher than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold (transition of 6V to 12V); then, when the first determination result indicates that the charging device and the powered device are already in an electrically decoupled state (for example, the charging gun is pulled out), the transmission signal includes an instruction for disconnecting the power output of the charging device, so as to ensure the safety of personnel and equipment.

As an example, if at a first time instant the first detection result is that the control pilot signal is below a first voltage threshold and the second detection result is that the control pilot signal is below a second voltage threshold; and at a second time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold (transition of 6V to 9V); then, the first determination result indicates that the powered device needs to stop charging (for example, the charging device completes charging) between the first time and the second time, and the transmission signal includes an instruction for the charging device to disconnect the power output, so as to ensure the safety of the personnel and the device.

Referring to fig. 11, for example, a charging management apparatus is provided between a charging apparatus and a powered apparatus. The transmission signal may be transmitted to at least one of the charging device and the powered device via a control pilot line (CP), and at this time, the transmission signal should have characteristics different from known signals on the control pilot line, for example, different voltage amplitudes, pulse frequencies, and the like. In order to avoid affecting the reading of the transmission signal, a transmission signal line 805 may be additionally provided, so that the command may be directly transmitted to at least one of the charging device and the powered device, and the flow of separating the transmission signal from the control pilot signal may be omitted for the charging device and the powered device.

Additionally, if the detection result indicates a lower than both the first and second threshold values, the signal controlling the pilot line should be at least less than 7.5V. For example, it may be 0V or 6V. At this point, a threshold voltage may be added to further the separation. With further reference to fig. 9, for example, a third comparator 8023 is provided that compares the control pilot signal with a third voltage threshold and outputs a third detection result, wherein the third voltage threshold is lower than the second voltage threshold, and the third voltage threshold is close to 0V; and generating a third judgment result in response to the third detection result, wherein when the third judgment result indicates that the control guide signal line is short-circuited, the sending signal comprises an instruction for disconnecting the power output of the charging equipment and an instruction for disconnecting the control guide signal, so that the safety of personnel and equipment is ensured. Likewise, the determination of the third voltage threshold introduced can also be combined with the above time determination. The confidence degree can be further increased for the measurement result by using the measurement at two moments, and the signal abnormality or the comparison result abnormality caused by signal interference and the like can be ignored. In addition, when the two moments are separated to the extent that the level jump can be detected, a more accurate judgment can be further made according to the signal state change. It is anticipated that the respective tables 1, 2, 3 will be scaled up in synchronism if a third voltage threshold is introduced. The third comparator is connected in a similar manner to the first and second comparators.

Referring to fig. 12, to achieve the object of the present invention, the present invention provides a charging apparatus 900. The method comprises the following steps: an acquisition module 901 for acquiring control guide signals; a comparison module 902, which includes a first comparator 9021 and a second comparator 9022, wherein the first comparator 9021 compares the control pilot signal with a first voltage threshold and outputs a first detection result, and the second comparator compares the control pilot signal with a second voltage threshold and outputs a second detection result, the control pilot signal being connected to the first input ports of the first comparator and the second comparator, the first voltage being connected to the second input port of the first comparator and the first voltage being connected to the second input port of the second comparator, wherein the second voltage threshold is lower than the first voltage threshold, between which there is an absolute value of an operating voltage amplitude or an operating voltage peak of the control pilot signal, and there is an absolute value of the operating voltage amplitude or operating voltage peak of the control pilot signal below the second voltage threshold and/or above the second voltage threshold; a determining module 903 generating a first determination result in response to a combination of the first detection result and the second detection result, the first determination result indicating a state of the charging apparatus and/or the powered apparatus; and an action module 904, which executes the corresponding electrical action according to the state.

The internal structure of the comparison module and the connection relationship with the signal can refer to the comparison module shown in fig. 10.

The operation principle of the charging device can be seen from table 1, and if the first comparator detection result indicates that it is lower than the first threshold value and the second comparator detection result indicates that it is higher than the second threshold value, the voltage of the control pilot signal is between 10.5V and 7.5V, which can be a constant voltage such as 9V or a PWM signal of 9V. This indicates that the charging device and the powered device have completed the first-stage connection. If the detection result indicates a lower than both the first and second threshold values, the signal controlling the pilot line should be at least less than 7.5V. As an example, it may be a constant voltage such as 6V or a PWM signal of 6V. This indicates that the charging device and the powered device are connected in the second phase. The charging device and the power receiving device are performing efficient power transmission. As another example, if the signal of the control pilot line is 0V, the control pilot line is likely to be shorted at both ends or the middle portion, and the short may exist on one or more of the charging device, the powered device, and the signal line, and this determination result may be used as a condition for controlling the level protection of the pilot line. If the detection result indicates that it is higher than the first threshold value and the second threshold value is lower, the comparison circuit is failed; or a fault occurs in an intermediate link from the comparison circuit to the one that produces the final judgment result.

The operating principle of the charging device can be further seen in table 3, which shows a specific scheme for generating the determination of the state of the charging device and/or the powered device according to the voltage comparison of adjacent time instants. The comparison module generates a first judgment result in response to the first detection result and the second detection result at the first moment and in response to the first detection result and the second detection result at the second moment.

As an example, if at a first time instant the first detection result is that the control pilot signal is below a first voltage threshold and the second detection result is that the control pilot signal is above a second voltage threshold; and at a second time instant, the first detection result is that the control pilot signal is higher than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold (transition of 9V to 12V); or, if at the first time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is lower than the second voltage threshold; and at a second time, the first detection result is that the control pilot signal is higher than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold (transition of 6V to 12V); then, when the first determination result indicates that the charging device and the powered device are already in an electrically decoupled state (for example, the charging gun is pulled out), the electrical action disconnects the power output for the charging device, so as to ensure the safety of personnel and devices.

As an example, if at a first time instant the first detection result is that the control pilot signal is below a first voltage threshold and the second detection result is that the control pilot signal is below a second voltage threshold; and at a second time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold (transition of 6V to 9V); then, the first determination result indicates that the powered device needs to stop charging (e.g., the charging device completes charging) between the first time and the second time, and at this time, the electrical action disconnects the power output for the charging device, so as to ensure the safety of the personnel and the device.

Although the above examples all resolve the state of the device by the first determination result. However, the first determination result may be ignored, the control pilot signal may be obtained by analog-to-digital conversion, and the second determination result may be generated directly in response to the control pilot signal, so as to obtain the state of the charging apparatus and/or the power receiving apparatus. Further, when the second judgment result indicates that the powered device is in a state of needing to stop charging, the electrical action is that the charging device disconnects the output of electric energy, so as to ensure the safety of personnel and equipment; when the second judgment result indicates that the charging equipment and the powered equipment are in an electrically decoupled state, the electrical action is to disconnect the power output of the charging equipment so as to ensure the safety of personnel and equipment.

Additionally, if the detection result indicates a lower than both the first and second threshold values, the signal controlling the pilot line should be at least less than 7.5V. For example, it may be 0V or 6V. At this point, a threshold voltage may be added to further the separation. For example, the control pilot signal is compared with a third voltage threshold to obtain a third detection result, wherein the third voltage threshold is lower than the second voltage threshold, and the third voltage threshold is close to 0V; and generating a third judgment result in response to the third detection result, wherein the third judgment result indicates that the charging equipment should be disconnected from power output when the control guide signal line is short-circuited, so that the safety of personnel and equipment is ensured. Likewise, the determination of the third voltage threshold introduced can also be combined with the above time determination. The confidence degree can be further increased for the measurement result by using the measurement at two moments, and the signal abnormality or the comparison result abnormality caused by signal interference and the like can be ignored. In addition, when the two moments are separated to the extent that the level jump can be detected, a more accurate judgment can be further made according to the signal state change. It is anticipated that the respective tables 1, 2, 3 will be scaled up in synchronism if a third voltage threshold is introduced. The third comparator is connected in a similar manner to the first and second comparators.

It should be noted that some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.

The above examples mainly explain the charging communication method, the charging management apparatus, and the charging apparatus of the present disclosure. Although only a few embodiments of the present invention have been described, those skilled in the art will appreciate that the present invention may be embodied in many other forms without departing from the spirit or scope thereof. Accordingly, the present examples and embodiments are to be considered as illustrative and not restrictive, and various modifications and substitutions may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

1. A charging communication method, comprising:

collecting a control guide signal;

comparing the control pilot signal to a first voltage threshold to obtain a first detection result, and comparing the control pilot signal to a second voltage threshold to obtain a second detection result, wherein: the second voltage threshold is lower than the first voltage threshold, there is an absolute value of an operating voltage amplitude or operating voltage peak of the control pilot signal between the first voltage threshold and the second voltage threshold, and there is an absolute value of an operating voltage amplitude or operating voltage peak of the control pilot signal that is lower than the second voltage threshold and/or higher than the second voltage threshold; and

and simultaneously generating a first judgment result in response to a combination of the first detection result and the second detection result at the first time and the second time, wherein the first judgment result indicates the state of the charging device and/or the power receiving device.

2. The method according to claim 1, wherein in the step of generating the first determination result:

if at the first time, the first detection result is that the control pilot signal is lower than the first voltage threshold, and the second detection result is that the control pilot signal is lower than the second voltage threshold; and at the second time, the first detection result is that the control pilot signal is higher than the first voltage threshold, and the second detection result is that the control pilot signal is higher than the second voltage threshold;

3. The method according to claim 1, wherein in the step of generating the first determination result:

4. The method according to claim 1, characterized in that the method further comprises the steps of: the control pilot signal is obtained by AD sampling and the first determination result is ignored, and a second determination result indicating a state of the charging apparatus and/or the power receiving apparatus is generated directly in response to the control pilot signal.

5. The method according to claim 4, characterized in that the method further comprises the step of:

the charging device disconnects the power output when the second determination result indicates that the powered device is in a state in which charging needs to be stopped, and/or when the second determination result indicates that the charging device and the powered device are already in an electrically decoupled state.

6. The method according to any one of claims 1-5, characterized in that the method further comprises the steps of:

7. A charge management device, characterized in that the device comprises:

the acquisition module is used for acquiring the control guide signal;

a comparison module comprising a first comparator for comparing the control pilot signal to a first voltage threshold and outputting a first detection result and a second comparator for comparing the control pilot signal to a second voltage threshold and outputting a second detection result, wherein: the second voltage threshold is lower than the first voltage threshold, there is an absolute value of an operating voltage amplitude or operating voltage peak of the control pilot signal between the first voltage threshold and the second voltage threshold, and there is an absolute value of an operating voltage amplitude or operating voltage peak of the control pilot signal that is lower than the second voltage threshold and/or higher than the second voltage threshold; and

a determining module, configured to generate a first determination result in response to a combination of the first detection result and the second detection result at a first time and a second time, respectively, at the same time, where the first determination result indicates a state of the charging apparatus and/or the powered apparatus.

8. The apparatus of claim 7, wherein the control pilot signal is coupled to first input ports of the first comparator and the second comparator simultaneously, wherein the first voltage threshold is input to a second input port of the first comparator, and wherein the second voltage threshold is input to a second input port of the second comparator.

9. The apparatus of claim 7, further comprising:

a transmitting module for transmitting a signal generated according to the state, the signal including an instruction instructing the charging device and/or the powered device to perform a corresponding action.

10. The device of claim 9, wherein the determining module is further configured to:

11. The device of claim 9, wherein the determining module is further configured to:

12. The apparatus according to any one of claims 9-11, wherein:

the comparison module further comprises a third comparator for comparing the control pilot signal with a third voltage threshold and outputting a third detection result, wherein the third voltage threshold is lower than the second voltage threshold, and the third voltage threshold is close to 0V;

13. A charging apparatus, characterized in that the charging apparatus comprises:

the acquisition module is used for acquiring the control guide signal;

a comparison module comprising a first comparator for comparing the control pilot signal to a first voltage threshold and outputting a first detection result and a second comparator for comparing the control pilot signal to a second voltage threshold and outputting a second detection result, wherein: the second voltage threshold is lower than the first voltage threshold, there is an absolute value of an operating voltage amplitude or operating voltage peak of the control pilot signal between the first voltage threshold and the second voltage threshold, and there is an absolute value of an operating voltage amplitude or operating voltage peak of the control pilot signal that is lower than the second voltage threshold and/or higher than the second voltage threshold;

a determining module, configured to generate a first determination result in response to a combination of the first detection result and the second detection result at a first time and a second time, respectively, at the same time, where the first determination result indicates a state of a charging apparatus and/or a powered apparatus; and

and the action module is used for executing corresponding electrical action according to the state.

14. The apparatus of claim 13, wherein the control pilot signal is coupled to first input ports of the first comparator and the second comparator simultaneously, wherein the first voltage threshold is input to a second input port of the first comparator, and wherein the second voltage threshold is input to a second input port of the second comparator.

15. The apparatus of claim 13, wherein the determining module is further configured to:

16. The apparatus of claim 13, wherein the determining module is further configured to:

17. The device of claim 13, wherein the charging device further comprises an AD sampling circuit to obtain the control pilot signal; wherein, ignoring the first determination result of the determination module, the AD sampling circuit generates a second determination result directly in response to the control pilot signal, the second determination result indicating a state of the charging apparatus and/or the power receiving apparatus.

18. The device of claim 17, wherein the action module is further configured to:

and when the second judgment result indicates that the powered device is in a state of needing to stop charging, and/or when the second judgment result indicates that the charging device and the powered device are already in an electrically decoupled state, executing an electrical action of disconnecting the power output by the charging device.

19. The apparatus of any of claims 13-18, wherein the comparison module further comprises a third comparator to compare the control pilot signal to a third voltage threshold and output a third detection result, wherein the third voltage threshold is lower than the second voltage threshold and the third voltage threshold is close to 0V;

the action module is further to: and when the third judgment result indicates that the control guide signal wire is in a short circuit state, executing the electrical actions of disconnecting the power output of the charging equipment and disconnecting the power output of the control guide signal.