CN116338343A

CN116338343A - Detection device and method suitable for alternating-current charging of new energy automobile

Info

Publication number: CN116338343A
Application number: CN202310071174.6A
Authority: CN
Inventors: 陈向
Original assignee: Chongqing Seres New Energy Automobile Design Institute Co Ltd
Current assignee: Chongqing Seres New Energy Automobile Design Institute Co Ltd
Priority date: 2023-01-17
Filing date: 2023-01-17
Publication date: 2023-06-27

Abstract

The application provides a detection device and method suitable for new energy automobile alternating current charging, and the device includes: first socket, first rifle and detection module that charges charge, wherein: the first charging socket is used for being connected with a second charging gun of the alternating-current charging pile, the first charging gun is used for being connected with a second charging socket of a vehicle, and the first charging socket is connected with the first charging gun; the detection module comprises a slide rheostat, the slide rheostat is connected with the first charging gun, and the slide rheostat is used for detecting whether the effective range of the confirmation connection resistor set by the vehicle software meets the corresponding design requirement. The embodiment of the application can realize the detection function without affecting charging.

Description

Detection device and method suitable for alternating-current charging of new energy automobile

Technical Field

The application relates to the technical field of new energy automobile charging, in particular to a detection device and method suitable for new energy automobile alternating current charging.

Background

Ac charging posts on the market are numerous in brands, and the difference of software and hardware exists between the ac charging posts with different brands and even different production years of the same brands, so that charging compatibility problems or other charging problems can occur.

How to check the problem occurring in the charging process or detect whether the charging process meets the related design requirements becomes a problem to be solved urgently at present.

Disclosure of Invention

In view of the above-mentioned drawbacks or shortcomings in the prior art, the present application is directed to a detection device and method suitable for ac charging of a new energy vehicle.

According to the detection device suitable for new energy automobile alternating current charging that provides according to the first aspect, include: first socket, first rifle and detection module that charges charge, wherein:

the first charging socket is used for being connected with a second charging gun of the alternating-current charging pile, the first charging gun is used for being connected with a second charging socket of a vehicle, and the first charging socket is connected with the first charging gun; the detection module comprises a slide rheostat, the slide rheostat is connected with the first charging gun, and the slide rheostat is used for detecting whether the effective range of the confirmation connection resistor set by the vehicle software meets the corresponding design requirement.

In one embodiment, the first charging receptacle and the first charging gun each have an ac power port including an ac power port of a first phase line, an ac power port of a second phase line, an ac power port of a third phase line, and a neutral line port;

for 380V alternating current charging pile, the alternating current power supply port of the first phase line of the first charging socket is connected with the alternating current power supply port of the first phase line of the first charging gun, the alternating current power supply port of the second phase line of the first charging socket is connected with the alternating current power supply port of the second phase line of the first charging gun, the alternating current power supply port of the third phase line of the first charging socket is connected with the alternating current power supply port of the third phase line of the first charging gun, and the neutral line port of the first charging socket is connected with the neutral line port of the first charging gun.

In one embodiment, for a 220V ac charging stake, an ac power port of a first phase line of the first charging receptacle is connected with an ac power port of a first phase line of the first charging gun, and a neutral port of the first charging receptacle is connected with a neutral port of the first charging gun; the rest AC power ports are all suspended.

In one embodiment, the console port of the first charging socket is connected with the console port of the first charging gun;

the charging connection confirmation port of the first charging socket is insulated and suspended, the charging connection confirmation port of the first charging gun is connected with one end of the sliding rheostat, and the other end of the sliding rheostat is connected with the level platform port of the first charging gun.

In one embodiment, the detection module further includes a first resistor, one end of the first resistor is connected to the level platform port of the first charging socket, and the other end of the first resistor is connected to the control leading end of the first charging socket.

In one embodiment, the detection module further comprises:

and the input end of the PWM (Pulse Width Modulation) generator is connected with the level platform port of the first charging gun, the output end of the PWM generator is connected with the control guide end of the first charging gun, and the PWM generator is used for detecting the output capacity of the alternating-current charging pile through different duty ratios.

According to a second aspect, the detection method suitable for the ac charging of the new energy automobile is implemented based on the detection device provided in the first aspect, and the method includes:

if the effective range of the confirmed connection resistance set by the vehicle software is a-b, judging whether a first design requirement is met or not when the effective resistance value of the sliding rheostat is adjusted to be smaller than a, wherein the first design requirement is as follows: the vehicle cannot identify the alternating-current charging pile and report a connection fault;

when the effective resistance value of the slide rheostat is regulated to be in the range of a-b, judging whether a second design requirement is met, wherein the second design requirement is as follows: the vehicle recognizes the alternating current charging pile and enters a charging state;

and if the first design requirement is met when the effective resistance value of the sliding rheostat is regulated to be smaller than a, and the second design requirement is met when the effective resistance value of the sliding rheostat is regulated to be within the range of a-b, the effective range a-b of the confirmation connection resistance set by the software of the vehicle meets the design requirement.

In one embodiment, different effective resistance values of the sliding rheostat correspond to different ac end current thresholds; the method further comprises the steps of:

in the charging process, sliding the sliding rheostat to different effective resistance values to obtain current alternating current end current, judging whether the current alternating current end current is smaller than an alternating current end current threshold corresponding to the current effective resistance value, and if so, judging that the alternating current end current is not out of standard; otherwise, the current of the alternating current end exceeds the standard.

In one embodiment, on the basis of including a PWM generator in the detection apparatus, the method further includes:

controlling the PWM generator to output pulse signals with different duty ratios;

if the current duty ratio corresponding to the pulse signal currently output by the PWM generator has a corresponding first alternating current end current threshold value and a corresponding second alternating current end current threshold value, selecting a smaller value of the first alternating current end current threshold value and the second alternating current end current threshold value, and taking the smaller value as a standard threshold value of the current duty ratio; if the current duty ratio corresponding to the pulse signal currently output by the PWM generator only corresponds to a first alternating current end current threshold value, taking the first alternating current end current threshold value as a standard threshold value of the current duty ratio; if the current duty ratio corresponding to the pulse signal currently output by the PWM generator only corresponds to a second alternating current end current threshold value, taking the second alternating current end current threshold value as a standard threshold value of the current duty ratio; the second alternating current end current threshold value is an alternating current end current threshold value preset according to a duty ratio range to which the current duty ratio belongs, and the first alternating current end current threshold value is an alternating current end current threshold value calculated according to the current duty ratio;

acquiring the current of the current alternating-current end output by the alternating-current charging pile;

judging whether the current of the current alternating-current end is smaller than or equal to the standard threshold value;

if yes, the output capacity of the alternating-current charging pile at the current duty ratio meets the standard;

otherwise, the output capacity of the alternating current charging pile at the current duty ratio does not meet the standard.

In one embodiment, the method further comprises:

controlling the PWM generator to output pulse signals with different voltage amplitudes;

if the current voltage amplitude is lower than a preset voltage value, judging whether the vehicle is charged; if yes, the preset voltage value accords with the corresponding design requirement; otherwise, the preset voltage value does not meet the corresponding design requirement.

In summary, the application provides a detection device and a detection method suitable for alternating-current charging of a new energy automobile, wherein the first charging socket is connected with a second charging gun of an alternating-current charging pile, the first charging gun is connected with a second charging socket of a vehicle, and the first charging socket is connected with the first charging gun, so that the detection device is used as an intermediate medium, and the charging of the vehicle by the alternating-current charging pile is not influenced. Meanwhile, the detection device comprises a detection module, and the detection module comprises a slide rheostat, so that whether the effective range of the confirmation connection resistance set by the software of the vehicle meets the corresponding design requirement can be detected through the slide rheostat. That is, the present application can realize the detection function without affecting the charging.

Drawings

Fig. 1 is a schematic connection diagram of a detection device suitable for ac charging of a new energy automobile, an ac charging pile and a vehicle according to an embodiment of the present application;

fig. 2 is a schematic connection diagram of a detection device suitable for ac charging of a new energy automobile, an ac charging pile and a vehicle according to another embodiment of the present application.

Reference numerals:

l1-an alternating current power supply port of a first phase line; an L2-second phase AC power port; an L3-third phase AC power port; an N-midline port; 51-level station port; 61-a charging connection confirmation port; 71-control boot port; r1-a first resistor.

Detailed Description

The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the invention are shown in the drawings.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In a first aspect, an embodiment of the present application provides a detection apparatus suitable for ac charging of a new energy automobile, see fig. 1, the apparatus including a first charging socket, a first charging gun and a detection module, wherein:

It will be appreciated that the detection device includes a charging socket and a charging gun, the ac charging post also has a charging gun, the vehicle also has a charging socket, the charging socket in the detection device is referred to as a first charging socket, the charging gun in the detection device is referred to as a first charging gun, the charging gun in the ac charging post is referred to as a second charging gun, and the charging socket in the vehicle is referred to as a second charging socket for the sake of distinction.

It is understood that the second charging gun of the ac charging stake, the first charging socket in the detection device, the first charging gun in the detection device, and the second charging socket in the vehicle all have multiple ports. Specifically, each port of the first charging socket is connected with each port of the second charging gun of the alternating current charging pile in a one-to-one correspondence manner, so that the connection between the first charging socket and the second charging gun of the alternating current charging pile is realized. And each port of the first charging gun is connected with each port of the second charging socket of the vehicle in a one-to-one correspondence manner so as to realize the connection of the first charging gun and the second charging socket of the vehicle. The first charging socket and the first charging gun can be connected through an alternating current power supply port, namely the alternating current power supply port of the first charging socket is connected with the alternating current power supply port of the first charging gun. Thus, the alternating current power supply output by the alternating current charging pile can be transmitted to the vehicle through the first charging socket and the alternating current power supply port of the first charging gun, so that charging is realized, and the detection device plays a role of a medium at the moment and does not influence the charging of the vehicle.

The arrows in fig. 1 mean the direction of the charging current.

In order to realize the detection function under the prerequisite that does not influence the charge, set up detection module, including the slide rheostat in the detection module, the slide rheostat with first rifle that charges is connected, slide the slide rheostat to different positions, through the different reactions of vehicle, can learn whether the effective scope of the affirmation connecting resistance that the software of vehicle set up accords with corresponding design demand.

The names of the ports connected between the second charging gun of the alternating-current charging pile and the first charging socket of the detection device are the same, and the names of the ports connected between the first charging gun of the detection device and the second charging socket of the vehicle are also the same. For example, the port a1 of the second charging gun of the direct current charging pile is connected to the port a1 of the first charging socket in the detection device, and the port a1 of the first charging gun in the detection device is connected to the port a1 of the second charging socket of the vehicle. If the port a1 of the first charging socket of the detecting means needs to be connected with the first charging gun, the port a1 of the first charging socket of the detecting means needs to be connected with the port a1 of the first charging gun.

It is seen that in this application embodiment, first charging socket can be connected with the second rifle that charges of alternating current charging stake, first charging rifle can be connected with the second socket that charges of vehicle, first charging socket with first charging rifle is connected to make detection device regard as intermediate medium, do not influence the charging of alternating current charging stake to the vehicle. Meanwhile, the detection device comprises a detection module, and the detection module comprises a slide rheostat, so that whether the effective range of the confirmation connection resistance set by the software of the vehicle meets the corresponding design requirement can be detected through the slide rheostat. That is, the present application can realize the above-described detection function without affecting charging.

In one embodiment, referring to fig. 2, the ac power ports of the first charging receptacle and the first charging gun each include an ac power port L1 of a first phase line, an ac power port L2 of a second phase line, an ac power port L3 of a third phase line, and a neutral line port N;

for the 380V alternating current charging pile, an alternating current power supply port L1 of a first phase line of the first charging socket is connected with an alternating current power supply port L1 of a first phase line of the first charging gun, an alternating current power supply port L2 of a second phase line of the first charging socket is connected with an alternating current power supply port L2 of a second phase line of the first charging gun, an alternating current power supply port L3 of a third phase line of the first charging socket is connected with an alternating current power supply port L3 of the third phase line of the first charging gun, and a neutral line port N of the first charging socket is connected with a neutral line port N of the first charging gun.

That is, the first charging socket is connected to the ac power port L1 of the first phase line of the first charging gun to form an ac power line of the first phase line; the first charging socket is connected with an alternating current power supply port L2 of a second phase line of the first charging gun to form an alternating current power supply circuit of the second phase line; the first charging socket is connected with an alternating current power supply port L3 of a third phase line of the first charging gun to form an alternating current power supply line of the third phase line, and the first charging socket is connected with a neutral line port N of the first charging gun to form a neutral line.

The neutral line of the three-phase alternating current circuit is used for ensuring that the voltages of all phases on a load are approximately symmetrical, so that voltage rise or voltage drop does not occur when the load is unbalanced, for example, the voltage of other two phases is unchanged when one phase breaks.

In one embodiment, for a 220V ac charging stake, the ac power port L1 of the first phase line of the first charging receptacle is connected with the ac power port L1 of the first phase line of the first charging gun, and the neutral line port N of the first charging receptacle is connected with the neutral line port N of the first charging gun; the rest AC power ports are all suspended.

That is, for the 220V ac charging pile, the first charging socket is connected to the ac power supply port L1 of the first phase line of the first charging gun, and forms an ac power supply line of the first phase line, which corresponds to a live line. The first charging socket is connected with a neutral line port N of the first charging gun to form a neutral line, which is equivalent to a zero line. At this time, the ac power ports of the other phase lines are suspended.

The second charging gun of the ac charging stake, the second charging socket of the vehicle, whether for a 220V ac charging stake or a 380V ac charging stake, also have the ac power source port of the first phase line, the ac power source port of the second phase line, the ac power source port of the third phase line, and the neutral line port described above. The connection relations are as follows: the alternating current power supply port of the first phase line of the second charging gun of the alternating current charging pile is connected with the alternating current power supply port of the first phase line of the first charging socket, and the alternating current power supply port of the first phase line of the first charger is connected with the alternating current power supply port of the first phase line of the second charging socket of the vehicle. The alternating current power supply port of the second phase line of the second charging gun of the alternating current charging pile is connected with the alternating current power supply port of the second phase line of the first charging socket, and the alternating current power supply port of the second phase line of the first charger is connected with the alternating current power supply port of the second phase line of the second charging socket of the vehicle. The alternating current power supply port of the third phase line of the second charging gun of the alternating current charging pile is connected with the alternating current power supply port of the third phase line of the first charging socket, and the alternating current power supply port of the third phase line of the first charger is connected with the alternating current power supply port of the third phase line of the second charging socket of the vehicle. The neutral line port of the second charging gun of the alternating-current charging pile is connected with the neutral line port of the first charging socket, and the neutral line port of the first charger is connected with the neutral line port of the second charging socket of the vehicle.

In one embodiment, referring to fig. 2, the dock port 51 of the first charging socket is connected with the dock port 51 of the first charging gun;

the charging connection confirmation port 61 of the first charging socket is insulated and suspended, the charging connection confirmation port 61 of the first charging gun is connected with one end of the sliding rheostat, and the other end of the sliding rheostat is connected with the level platform port 51 of the first charging gun.

That is, the first charging socket and the first charging gun each have a dock port 51. In practice, the second charging gun of the ac charging pile and the second charging socket of the vehicle also have a level stand interface, and the level stand ports 51 of the second charging gun, the first charging socket, the first charging gun, and the second charging socket of the vehicle of the ac charging pile are sequentially connected to form one connection line.

Among them, the stage port 51, that is, a PE (Protective Earthing, protection ground) port, may also be referred to as a protection conductor port. The connection lines formed by sequentially connecting the respective stage ports 51 may be referred to as guard conductor lines. The protection conductor line may perform charge protection functions, such as protection to ground, discharging, charging again for connection, etc.

That is, since the first charging socket and the first charging gun each have the charging connection confirmation port 61, the detection of whether the effective range of the confirmation connection resistance set in the software of the vehicle meets the corresponding design requirement is performed by the slide rheostat to which the charging connection confirmation port 61 of the first charging gun is connected, and the charging connection confirmation port 61 of the first charging socket is not required, the charging connection confirmation port 61 of the first charging socket is insulated and suspended, and the insulation treatment can be performed by winding with an adhesive tape.

In this embodiment, one end of the slide rheostat is connected to the charging connection confirmation port 61 of the first charging gun, and the other end of the slide rheostat is connected to the level stand port 51 of the first charging gun. The slide rheostat can be used for simulating and confirming the connection resistance by changing the effective resistance of the slide rheostat so as to simulate the confirmation connection resistance with different resistance values, and further realize the detection of whether the effective range of the confirmation connection resistance set by the software of the vehicle meets the corresponding design requirement.

For example, the standard resistance of the connection resistor is confirmed to be 100deg.OMEGA, the effective range of the connection resistor is confirmed to be 35Ω -108Ω by the vehicle software, and the design requirements are as follows: 1. when it is confirmed that the connection resistance is lower than 35 omega, the vehicle cannot recognize the ac charging stake and report a connection failure for a certain period of time. 2. When it is confirmed that the connection resistance is equal to 35 Ω, the vehicle can recognize the ac charging stake and enter a charged state.

Therefore, the sliding rheostat is slid until the effective resistance of the sliding rheostat is 34 omega, and if the vehicle cannot identify the alternating-current charging pile and a connection fault is reported within a certain time, the design requirement 1 is met. When the sliding rheostat is slid to the effective resistance value of 35 omega, the vehicle can identify the alternating current charging pile and enter the charging state, and the design requirement 2 is met.

It is understood that each port of the second charging gun and the second charging socket also includes a charging connection confirmation port, the charging connection confirmation port of the second charging gun is connected with the charging connection confirmation port of the first charging socket, and the charging connection confirmation port of the first charging gun is connected with the charging connection confirmation port of the second charging socket.

The charging connection confirmation port is used for confirming connection between the vehicle and the alternating-current charging pile.

In one embodiment, referring to fig. 2, the detection module further includes a first resistor R1, one end of the first resistor R1 is connected to the level port 51 of the first charging socket, and the other end of the first resistor R1 is connected to the control lead 71 of the first charging socket.

Without the first resistor, the interaction process between the ac charging stake and the vehicle includes: a1, outputting 12V voltage from the control guide port of the second charging gun of the alternating-current charging pile, wherein the 12V voltage is actually the voltage difference between the control guide port of the second charging gun and the level platform port, and the electric platform port corresponds to a negative electrode. A2, after the second charging gun is connected to the vehicle through the detection device, the voltage of 12V becomes 9V due to the voltage division of the resistor at the vehicle end. A3, after the user swipes the card, the duty ratio of the PWM generator is changed from 100% to a current certain duty ratio, for example, 50%, so that the voltage output by the alternating current charging pile is changed from 9V to 9V by the current duty ratio, for example, 9 by 50% = 4.5V. A4, when the vehicle is ready, a switch at the vehicle end is closed, and after the switch is closed, a resistor is connected, and the output voltage is changed from 9V to 6V through voltage division of the resistor. A5, the alternating-current charging pile closes the alternating-current power switch, so that 220V or 380V alternating current is output, and the vehicle starts to be charged. Here, the first resistor is provided so as to replace two resistors and switches at the vehicle end, namely, the resistor for changing the voltage of 12V to 9V in the above b and the resistor and switch for changing the current duty ratio of 9V to the current duty ratio of 6V in the above d. Therefore, the AC charging pile can directly detect that the voltage of 12V jumps to 6V, and the user is ensured to directly jump from 6V to the current duty ratio after swiping a card, so that the AC power supply is ensured to be output, and the situation that the AC power supply cannot be output by the AC charging pile when the two voltage division cannot be realized because of the abnormality of a vehicle end is avoided, namely, the normal output of the AC power supply can be ensured by setting the first resistor.

The second charging gun and the second charging socket are also provided with control guide ports, the control guide ports of the second charging gun are connected with the control guide ports of the first charging socket, the control guide ports of the first charging gun are connected with the control guide ports of the second charging socket, but the control guide ports of the first charging socket are not connected with the control guide ports of the first charging gun, specifically, the control guide ports of the first charging socket are connected with one end of the first resistor, and the control guide ports of the first charging gun are connected with the output end of the PWM generator.

In one embodiment, referring to fig. 2, the detection module may further include:

the input end of the PWM generator is connected with the level platform port 51 of the first charging gun, the output end of the PWM generator is connected with the control guide end 71 of the first charging gun, and the PWM generator is used for detecting the output capacity of the alternating-current charging pile through different duty ratios.

It will be appreciated that the PWM generator is involved in explaining the effect of the first resistor. The input end of the PWM generator is connected with the level platform port of the first charging gun, and the output end of the PWM generator is connected with the control guide end of the first charging gun. The duty cycle of the PWM generator represents the output capability of the ac charging stake, so that the output capability of the ac charging stake can be detected by the PWM generator.

Specific detection methods can be referred to in steps S21 to S24 in the second aspect. That is, S21, controlling the PWM generator to output pulse signals of different duty ratios; s22, if the current duty ratio corresponding to the pulse signal currently output by the PWM generator has a corresponding first alternating current end current threshold value and a corresponding second alternating current end current threshold value, selecting a smaller value of the first alternating current end current threshold value and the second alternating current end current threshold value, and taking the smaller value as a standard threshold value of the current duty ratio; if the current duty ratio corresponding to the pulse signal currently output by the PWM generator only corresponds to the first alternating current end current threshold value, the first alternating current end current threshold value is used as a standard threshold value of the current duty ratio; if the current duty ratio corresponding to the pulse signal currently output by the PWM generator only corresponds to the second alternating current end current threshold value, the second alternating current end current threshold value is used as a standard threshold value of the current duty ratio; the second alternating current end current threshold value is an alternating current end current threshold value set according to a duty ratio range to which the current duty ratio belongs, and the first alternating current end current threshold value is an alternating current end current threshold value calculated according to the current duty ratio; s23, acquiring the current alternating-current end current output by the alternating-current charging pile; s24, judging whether the current of the current alternating-current end is smaller than or equal to the standard threshold value; if yes, the output capacity of the alternating-current charging pile at the current duty ratio meets the standard; otherwise, the output capacity of the alternating current charging pile at the current duty ratio does not meet the standard.

Wherein the first resistance may be selected to be 880 ohms.

Wherein the first charging socket meets GBT20234.2-2015 and the first charging gun meets GBT20234.2-2015.

It can be understood that the detection device is added between the alternating-current charging pile and the vehicle, and a plurality of detection items are realized through different gear adjustments of the sliding rheostat and the PWM generator in the detection device, so that the problem that the whole vehicle alternating-current charging system cannot be debugged and detected or is inconvenient to debug and detect is solved. The detection device is suitable for debugging and detecting the AC charging system of the new energy automobile, meets the requirements that the national standard AC charging vehicles are all suitable, and can also be used for checking abnormal problems of the AC charging piles in the market, and has strong universality and wide application range. And the operation is simple, and the convenience is greatly improved.

In a second aspect, an embodiment of the present application provides a detection method applicable to ac charging of a new energy automobile, where the method is implemented based on the detection device provided in the first aspect. The method comprises the following steps S11 to S12:

s11, if the effective range of the confirmed connection resistance set by the vehicle software is a-b, judging whether a first design requirement is met or not when the effective resistance of the sliding rheostat is adjusted to be smaller than a, wherein the first design requirement is as follows: the vehicle cannot identify the alternating-current charging pile and report a connection fault;

wherein, a and b in the effective range of the confirmed connection resistor are set according to the standard resistance value of the confirmed connection resistor, one resistance value smaller than the standard resistance value is taken as a, and one resistance value larger than the standard resistance value is taken as b. That is, the resistance values a and b are determined in the vicinity of the standard resistance value. For example, in the first aspect, a is 35Ω and b is 1000Ω in the corresponding portion.

S12, judging whether a second design requirement is met or not when the effective resistance value of the sliding rheostat is regulated to be within the range of a-b, wherein the second design requirement is as follows: the vehicle recognizes the alternating current charging pile and enters a charging state;

and S13, if the first design requirement is met when the effective resistance value of the sliding rheostat is regulated to be smaller than a, and the second design requirement is met when the effective resistance value of the sliding rheostat is regulated to be within the range of a-b, the effective range a-b of the confirmation connection resistance set by the software of the vehicle meets the design requirement.

Therefore, the design requirements corresponding to the effective range of the validation connecting resistance set by the software of the vehicle include the first design requirement and the second design requirement, and when both the two design requirements are satisfied, the validation connecting resistance effective range set by the software of the vehicle can be described to meet the corresponding design requirements.

In one embodiment, in addition to detecting that the valid range of the confirmed connection resistance set by the software of the vehicle meets the corresponding design requirement, the capability of the charging cable can also be detected through the sliding rheostat. For 220V ac charging stake, for example, when the connection resistance is confirmed to be 100Ω, the ac terminal current threshold between the ac power source port L1 of the first phase line and the neutral line port N is 64A; when the connection resistance is confirmed to be 220 omega, the alternating-current end current threshold value between the alternating-current power supply port L1 of the first phase line and the neutral line port N is 32A; when the connection resistance is 680 omega, the alternating-current end current threshold value between the alternating-current power supply port L1 of the first phase line and the neutral line port N is 16A; when it is confirmed that the connection resistance is 1500Ω, the ac-side current threshold between the ac power supply port L1 of the first phase line and the neutral line port N is 10A. That is, the different resistance values of the confirmation connection resistance correspond to different ac end current thresholds, and the slide rheostat is used to simulate the different resistance values of the confirmation connection resistance.

Based on this, the method provided in the embodiment of the present application may further include:

For example, the sliding rheostat is slid until the effective resistance is 100deg.C, and it is determined whether the current of the ac terminal between the ac power port L1 of the first phase line and the neutral line port N is less than or equal to 64A, if yes, it indicates that the current is not out of standard, otherwise, the current of the ac terminal is out of standard. And then, sliding the slide rheostat until the effective resistance is 220 omega, judging whether the current of the alternating current end between the alternating current power supply port L1 of the first phase line and the neutral line port N is smaller than or equal to 32A, if so, the current of the alternating current end does not exceed the standard, and otherwise, the current of the alternating current end exceeds the standard. Then, the sliding rheostat is slid until the effective resistance is 680 omega, whether the current of the alternating current end between the alternating current power supply port L1 of the first phase line and the neutral line port N at the moment is smaller than or equal to 16A is judged, if yes, the current of the alternating current end at the moment does not exceed the standard, and otherwise, the current of the alternating current end at the moment exceeds the standard. And then, sliding the slide rheostat until the effective resistance is 1500Ω, judging whether the current of the alternating current end between the alternating current power supply port L1 and the neutral line port N of the first phase line is less than or equal to 10A, if so, the current of the alternating current end does not exceed the standard, and otherwise, the current of the alternating current end exceeds the standard. If there are a plurality of times of exceeding in the above process, the charging is ended.

Therefore, two detection items can be realized through the slide rheostat, one is to detect that the effective range of the confirmed connection resistance set by the software of the vehicle meets the corresponding design requirement; one is to detect whether the ac current exceeds the standard.

In one embodiment, on the premise that the detection device has a PWM generator, the method provided in the embodiment of the present application may further include the following steps S21 to S24:

s21, controlling the PWM generator to output pulse signals with different duty ratios.

It is understood that the PWM generator may output pulse signals of different duty cycles.

S22, if the current duty ratio corresponding to the pulse signal currently output by the PWM generator has a corresponding first alternating current end current threshold value and a corresponding second alternating current end current threshold value, selecting a smaller value of the first alternating current end current threshold value and the second alternating current end current threshold value, and taking the smaller value as a standard threshold value of the current duty ratio; if the current duty ratio corresponding to the pulse signal currently output by the PWM generator only corresponds to a first alternating current end current threshold value, taking the first alternating current end current threshold value as a standard threshold value of the current duty ratio; if the current duty ratio corresponding to the pulse signal currently output by the PWM generator only corresponds to the second alternating current end current threshold value, the second alternating current end current threshold value is used as a standard threshold value of the current duty ratio; the second ac terminal current threshold is an ac terminal current threshold set according to a duty cycle range to which the current duty cycle belongs, and the first ac terminal current threshold is an ac terminal current threshold calculated according to the current duty cycle.

Different second ac side current thresholds may be set in advance for different duty cycle ranges, for example, charging is not allowed when the duty cycle D <8%, the second ac side current threshold is 6A when 8% +.ltoreq.duty cycle D <10%, and there is no corresponding second ac side current threshold when 10% < duty cycle d+.ltoreq.85%; the second ac side current threshold is 63A when 85% < duty cycle D is less than or equal to 90%. The second ac terminal current threshold is a threshold value indicating the ac terminal current setting between the ac power supply port L1 of the first phase line and the neutral line port N for the 220V ac charging stake.

Different first alternating-current end current threshold calculation formulas can be preset for different duty ratio ranges, for example, D is more than or equal to 10% and less than or equal to 85%, and the first alternating-current end current threshold calculation formulas are D multiplied by 100 multiplied by 0.6; for 85% < D.ltoreq.90%, the first AC side current threshold calculation formula is (Dx100-64). Times.2.5.

It can be seen that when D is 8% or less and less than 10%, the standard threshold is 6A; when 10% < duty cycle D is less than or equal to 85%, the standard threshold is Dx100×0.6; when 85% < D.ltoreq.90%, the standard threshold is (Dx100-64). Times.2.5 if (Dx100-64). Times.2.5 is less than 63A, and the standard threshold is 63A if (Dx100-64). Times.2.5 is equal to or greater than 63A.

S23, obtaining the current alternating current end current output by the alternating current charging pile.

S24, judging whether the current of the current alternating-current end is smaller than or equal to the standard threshold value; if yes, the output capacity of the alternating-current charging pile at the current duty ratio meets the standard; otherwise, the output capacity of the alternating current charging pile at the current duty ratio does not meet the standard.

That is, if the obtained current at the current ac end is less than or equal to the standard threshold, it is indicated that the output capability of the ac charging pile at the current duty ratio is standard. And if the obtained current of the current alternating-current end is larger than the standard threshold value, the output capacity of the alternating-current charging pile at the current duty ratio is out of standard.

For example, the duty ratio is set to 90%, the duty ratio is gradually reduced, and when the duty ratio is reduced to 85% -90%, whether the output capacity of the alternating-current charging pile at the current duty ratio meets the standard is judged. And then reducing the duty ratio to 10% -85%, and judging whether the output capacity of the alternating-current charging pile at the current duty ratio meets the standard or not. And then, the duty ratio is reduced to 8 percent to less than or equal to D <10 percent, and whether the output capacity of the alternating current charging pile at the current duty ratio meets the standard is judged. And if the charging is not in accordance with the standard for a plurality of times, ending the charging.

In one embodiment, the method provided in the embodiment of the present application may further include the following steps S31 to S32:

s31, controlling the PWM generator to output pulse signals with different voltage amplitudes;

s32, judging whether the vehicle is charged or not when the current voltage amplitude is lower than a preset voltage value; if yes, the preset voltage value accords with the corresponding design requirement; otherwise, the preset voltage value does not meet the corresponding design requirement.

It is understood that the PWM generator may have different voltage amplitudes in addition to being able to output pulse signals of different duty cycles.

For example, the voltage of the control pilot port of the first charging gun is effective at 4V to 12V, the preset voltage value is set to 3V, and the design requirement is that the voltage is considered to be ineffective when the output voltage is lower than 3V, so that the charging needs to be ended. Therefore, the PWM is controlled to output pulse signals with different voltage amplitudes, when the voltage amplitude is lower than 3V, whether the vehicle is charged is judged, if the vehicle is charged, the preset voltage value is according with the design requirement, otherwise, the preset voltage value is not according with the design requirement, and therefore whether the preset voltage value meets the design requirement can be detected.

Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. The foregoing is merely a preferred embodiment of the present application, and it should be noted that, due to the limited nature of text, there is an objectively infinite number of specific structures, and that, to those skilled in the art, several improvements, modifications or changes can be made, and the above technical features can be combined in a suitable manner, without departing from the principles of the present invention; such modifications, variations and combinations, or the direct application of the concepts and aspects of the invention in other applications without modification, are intended to be within the scope of this application.

Claims

1. Detection device suitable for new energy automobile alternating current charging, characterized by comprising: first socket, first rifle and detection module that charges charge, wherein:

2. The apparatus of claim 1, wherein the first charging receptacle and the first charging gun each have an ac power port, the ac power ports including an ac power port of a first phase line, an ac power port of a second phase line, an ac power port of a third phase line, and a neutral line port;

3. The apparatus of claim 2, wherein for a 220V ac charging stake, an ac power port of a first phase line of the first charging receptacle is connected with an ac power port of a first phase line of the first charging gun, and a neutral port of the first charging receptacle is connected with a neutral port of the first charging gun; the rest AC power ports are all suspended.

4. The apparatus of claim 1, wherein a landing port of the first charging socket is connected with a landing port of the first charging gun;

5. The apparatus of claim 4, wherein the detection module further comprises a first resistor, one end of the first resistor is connected to a power stage port of the first charging socket, and the other end of the first resistor is connected to a control lead of the first charging socket.

6. The apparatus of claim 4, wherein the detection module further comprises:

the input end of the PWM generator is connected with the level platform port of the first charging gun, the output end of the PWM generator is connected with the control guide end of the first charging gun, and the PWM generator is used for detecting the output capacity of the alternating-current charging pile through different duty ratios.

7. A detection method suitable for ac charging of a new energy vehicle, characterized in that the method is implemented based on the detection device of claim 1, the method comprising:

8. The method of claim 7, wherein different effective resistance values of the sliding resistor correspond to different ac side current thresholds; the method further comprises the steps of:

9. The method of claim 7, wherein the detection device is the detection device of claim 6, the method further comprising:

10. The method as recited in claim 9, further comprising: