CN212950143U - Charging pile relay diagnosis system and vehicle - Google Patents
Charging pile relay diagnosis system and vehicle Download PDFInfo
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- CN212950143U CN212950143U CN202020367510.3U CN202020367510U CN212950143U CN 212950143 U CN212950143 U CN 212950143U CN 202020367510 U CN202020367510 U CN 202020367510U CN 212950143 U CN212950143 U CN 212950143U
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Abstract
The embodiment of the utility model provides a fill electric pile relay diagnostic system and vehicle is provided, through the utility model discloses the scheme that provides can be on the basis of having circuit condition, simply increase during high-pressure current-limiting module provides high voltage signal and pours into former circuit into, and then carries out the comparison through high-pressure sampling circuit measured voltage signal and confirms that the adhesion takes place simultaneously with filling electric pile high pressure negative pole relay that charges high pressure positive relay, and this kind of mode is little to the change of original circuit, and is with low costs, and measuring result is reliable.
Description
Technical Field
The utility model relates to a new energy automobile field, concretely relates to fill electric pile relay diagnostic system and vehicle.
Background
If the relay is improperly controlled in the using process, the high-voltage relay is easily adhered. When the electric motor car goes to fill electric pile and charges, if the adhesion takes place for the relay of the stake end of charging, the stake end of charging exists electric capacity, and when no voltage, it is very little to be in load loop internal resistance, when the electric motor car closed relay, on being equivalent to the direct loading of high-tension electricity to the very little loop of internal resistance, at this moment the electric current has surpassed the overload capacity of relay, directly can lead to the relay adhesion of car end.
Disclosure of Invention
The embodiment of the utility model discloses fill electric pile relay diagnostic system and vehicle can detect and fill electric pile relay whether adhesion, protection vehicle safety.
The embodiment of the utility model provides an aspect discloses a fill electric pile relay diagnostic, include:
a charging post relay diagnostic system, comprising: the system comprises a vehicle end high-voltage positive electrode charging relay, a power battery, a high-voltage sampling circuit and a high-voltage current limiting module;
the first end of the vehicle end high-voltage positive charging relay is connected with the sampling end of the high-voltage sampling circuit and the output end of the high-voltage current limiting module and is connected with the charging pile system during charging, and the second end of the vehicle end high-voltage positive charging relay is connected with the positive electrode of the power battery;
the positive electrode of the power battery is connected with the second end of the high-voltage positive charging relay at the vehicle end, and the negative electrode of the power battery is connected with the charging pile system during charging;
the sampling end of the high-voltage sampling circuit is connected with the first end of a high-voltage positive charging relay at the vehicle end and the output end of the high-voltage current limiting module, and is connected with a charging pile system during charging, and the grounding end of the high-voltage sampling circuit is grounded;
the output end of the high-voltage current limiting module is connected with the sampling end of the high-voltage sampling circuit and the first end of the high-voltage positive charging relay at the vehicle end and is connected with a charging pile system during charging, and the input end of the high-voltage current limiting module is connected with the positive electrode of the power battery.
The embodiment second aspect discloses a vehicle, the vehicle includes the utility model provides a fill electric pile relay diagnostic system of first aspect.
Compared with the prior art, the embodiment of the utility model provides a following beneficial effect has: through the embodiment of the utility model provides a scheme can be on the basis of having the circuit condition, simply increases during high-voltage current limiting module provides high voltage signal and pours into former circuit into, and then carries out the comparison through high-pressure sampling circuit measurement voltage signal and confirms that the pile high-pressure positive relay that charges and fill electric pile high-pressure negative pole relay whether take place the adhesion simultaneously, and this kind of mode is little to the change of original circuit, and is with low costs, and the measuring result is reliable.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of a charging pile relay diagnosis system and a charging pile connection circuit disclosed in an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a high voltage current limiting module according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of an embodiment of a charging pile relay diagnostic system disclosed in an embodiment of the present invention;
fig. 4 is a first schematic circuit diagram of a charging pile relay diagnostic system according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a second connection to a charging pile system according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of another embodiment of a charging pile relay diagnostic system according to an embodiment of the present invention;
fig. 7 is a first schematic circuit diagram of a charging pile relay diagnostic system according to another embodiment of the present invention;
fig. 8 is a schematic circuit diagram of a second and charging pile system connection according to another embodiment of the charging pile relay diagnostic system disclosed in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that the terms "first", "second", "third" and "fourth" etc. in the description and claims of the present invention are used for distinguishing different objects, and are not used for describing a specific order. The terms "comprises," "comprising," and "having," and any variations thereof, of embodiments of the present invention are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, the embodiment of the utility model provides a fill electric pile and fill electric pile relay diagnostic system, through increase high voltage current limiting module in Battery Management System (BMS), before the relay that fills electric pile has not been put through before charging begins, pass through earlier high voltage current limiting module provides a high voltage signal in to charging circuit, later compare the voltage value that this high voltage current limiting module provided and the voltage value that has had high voltage sampling circuit in the charging circuit obtained, if both follow unanimously, then explain to fill electric pile relay normal work, if the voltage that high voltage sampling circuit obtained can not rise or the rising speed is slow, then explain to fill electric pile relay unusual.
The structure and the principle of the charging pile relay diagnosis system provided by the embodiment of the invention are specifically described below with reference to the accompanying drawings.
As shown in fig. 1, the embodiment of the present invention provides a schematic circuit diagram of a connection circuit between a charging pile relay diagnosis system 200 and a charging pile system 100. The charging pile system 100 comprises a charging pile power module 110, a charging pile high-voltage positive relay 120 and a charging pile high-voltage negative relay 130, and the charging pile relay diagnosis system 200 comprises a power battery 210, a vehicle end high-voltage positive charging relay 220, a vehicle end high-voltage negative charging relay 230, a high-voltage sampling circuit 240 and a high-voltage current limiting module 250;
wherein the content of the first and second substances,
one end of the charging pile power module 110 is connected with a first end of the charging pile high-voltage positive relay 120, and the other end is connected with a first end of the charging pile high-voltage negative relay 130;
a first end of the charging pile high-voltage positive relay 120 is connected with the charging pile power module 110, and a second end of the charging pile high-voltage positive relay 120 is connected with a first end of the vehicle end high-voltage positive charging relay 220, a sampling end of the high-voltage sampling circuit 240 and an output end of the high-voltage current limiting module 250 during charging;
a first end of the charging pile high-voltage negative relay 130 is connected with the charging pile power module 110, and a second end of the charging pile high-voltage negative relay 130 is connected with a first end of the vehicle end high-voltage negative charging relay 220 and is grounded when charging;
a first end of the vehicle-end high-voltage positive charging relay 220 is connected with a sampling end of the high-voltage sampling circuit 240 and an output end of the high-voltage current limiting module 250, and is connected with a second end of the charging pile high-voltage positive relay 120 during charging, and a second end of the vehicle-end high-voltage positive charging relay 220 is connected with a positive electrode of the power battery 210;
when charging, the first end of the vehicle-end high-voltage negative charging relay 230 is connected with the second end of the charging pile high-voltage negative relay 130 and is grounded, and the second end of the vehicle-end high-voltage negative charging relay 230 is connected with the negative electrode of the power battery 210;
the sampling end of the high-voltage sampling circuit 240 is connected with the first end of the vehicle end high-voltage positive electrode charging relay 220 and the output end of the high-voltage current limiting module 250, and is connected with the second end of the charging pile high-voltage positive electrode relay 120 during charging, and the grounding end of the high-voltage sampling circuit 240 is grounded;
the output end of the high voltage current limiting module 250 is connected with the sampling end of the high voltage sampling circuit 240 and the first end of the vehicle end high voltage positive electrode charging relay 220, and is connected with the second end of the charging pile high voltage positive electrode relay 120 during charging, and the input end of the high voltage current limiting module 250 is connected with the positive electrode of the power battery 210.
The working principle of the circuit is explained as follows:
after the vehicle is connected with the charging pile, for example, after the vehicle is connected with the charging gun, the BMS controls the high voltage current limiting module 250 to provide a high voltage signal to the charging pile system 100, for example, the voltage range of the high voltage signal can be the same as or close to the voltage of the high voltage battery, the high voltage signal is obtained by the high voltage current limiting module 250 through current limiting, and after the high voltage signal is provided, according to the adhesion condition of the charging pile high voltage positive relay 120 and the charging pile high voltage negative relay 130, the voltage obtained by the measurement of the high voltage sampling circuit 240 can have the following situations:
the first situation is as follows: the voltage measured by the high voltage sampling circuit 240 is consistent with the voltage output by the high voltage current limiting module 250, and is consistent with the voltage of the high voltage battery in a very short time, in the embodiment of the present invention, the time may be, for example, less than 10 ms; this indicates that the charging pile high voltage positive relay 120 and the charging pile high voltage negative relay 130 are not simultaneously adhered;
case two: the high voltage sampling circuit 240 measures and obtains voltage rise speed slowly or can't rise to the numerical value similar with the voltage of high voltage current limiting module 250 output, in the embodiment of the utility model provides an, rise speed slowly for example can exceed and predetermine 2 times of rise time, and this situation explains fills electric pile high pressure positive relay 120 and fills electric pile high pressure negative pole relay 130 and probably takes place the adhesion simultaneously.
From the above description can be seen, through the embodiment of the utility model provides a fill electric pile relay diagnostic system can be on the basis that has circuit condition, simply increase during high-voltage current limiting module provides the former circuit of high voltage signal injection, and then carry out the comparison through high-pressure sampling circuit measured voltage signal and confirm that it fills electric pile high pressure positive relay and fill electric pile high pressure negative pole relay whether take place the adhesion simultaneously, and this kind of mode is little to the change of original circuit, and is with low costs, and the measuring result is reliable.
In the above embodiment, the charging pile system 100 includes at least two relays 120 and 130, and actually, in other embodiments, the relay 130 may not be included; the result obtained by the measurement corresponds to the adhesion condition of 120, and the specific method is substantially the same as that in the above embodiment, and is not described herein again.
In the above embodiment, the charging pile relay diagnosis system 200 includes at least two relays 220 and 230, and in other embodiments, the relay 230 may not be provided, and the negative electrode of the power battery 210 may be grounded.
As shown in fig. 2, a circuit diagram of an embodiment of a high voltage current limiting module according to an embodiment of the present invention includes: current limiting resistor 310, diode 320, change-over switch 330, wherein:
a first end of the current limiting resistor 310 is connected with the positive electrode of the power battery 210;
a second terminal of the current limiting resistor 310 is connected to the anode of the diode 320; the cathode of the diode 320 is connected to the first terminal of the switch 330;
the second end of the switch 330 is the output end of the high-voltage current-limiting module;
one of the functions of the current limiting resistor 350 is to prevent the high-voltage current limiting module from being burnt out by short circuit;
the working principle of the circuit is explained as follows:
when a high voltage signal needs to be injected into the charging circuit, the BMS controls the switch 330 to be closed, and the high voltage signal is injected into the charging circuit from the second end of the switch 330; when the relay adhesion detection is finished, the BMS controls the switch 330 to be turned on.
A specific connection manner of the current limiting resistor 310, the diode 320 and the switch 330 is given above, and in practice, the mutual positions of the above three devices may not be limited to this, and the three devices may be connected in series in the module according to the function of the circuit.
The above is right through fig. 1 and fig. 2 the embodiment of the present invention includes simultaneously charging pile 100 and charging pile relay diagnosis system 200 and charging pile relay diagnosis system to explain, in addition, the embodiment of the present invention also provides a charging pile relay diagnosis system, as shown in fig. 3, for the embodiment of the present invention discloses a circuit schematic diagram of an embodiment of charging pile relay diagnosis system, the charging pile relay diagnosis system includes: the system comprises a vehicle end high-voltage positive electrode charging relay 3220, a power battery 3210, a high-voltage sampling circuit 3240 and a high-voltage current limiting module 3250;
a first end of the vehicle-end high-voltage positive charging relay 3220 is connected with a sampling end of the high-voltage sampling circuit 3240 and an output end of the high-voltage current limiting module 3250, and is connected with a charging pile system (not shown in the figure) during charging, and a second end of the vehicle-end high-voltage positive charging relay 3220 is connected with a positive electrode of the power battery 3210;
the positive pole of the power battery 3210 is connected with the second end of a vehicle-end high-voltage positive pole charging relay 3220, and the negative pole of the power battery 3210 is connected with a charging pile system (not shown in the figure) during charging;
the sampling end of the high-voltage sampling circuit 3240 is connected with the first end of the vehicle end high-voltage positive charging relay 3220 and the output end of the high-voltage current limiting module 3250, and is connected with a charging pile system (not shown in the figure) during charging, and the grounding end of the high-voltage sampling circuit 3240 is grounded;
the output end of the high voltage current limiting module 3250 is connected to the sampling end of the high voltage sampling circuit 3240 and the first end of the vehicle-end high voltage positive charging relay 3220, and is connected to a charging pile system (not shown in the figure) during charging, and the input end of the high voltage current limiting module 3250 is connected to the positive electrode of the power battery 3210.
The high voltage current limiting module 3250 may be embodied as shown in fig. 2, and will not be described herein.
Two specific situations of the charging pile relay diagnosis system in use are described below with reference to fig. 4 and 5, where the two situations are:
case 1: the charging pile system comprises a charging pile high-voltage positive relay 4120 and a charging pile high-voltage negative relay 4130;
case 2: the charging pile system includes a charging pile high voltage positive relay 5120.
Fig. 4 is a first schematic circuit diagram of a charging pile system connection according to an embodiment of the charging pile relay diagnosis system disclosed in the embodiment of the present invention, as shown in fig. 4, when the charging pile system includes a charging pile high-voltage positive relay 4120 and a charging pile high-voltage negative relay 4130, a first end of the vehicle-end high-voltage positive charging relay 3220 is connected to a sampling end of the high-voltage sampling circuit 3240 and an output end of the high-voltage current limiting module 3250, and is specifically connected to the charging pile high-voltage positive relay 4120 in the charging pile system during charging;
the negative pole of the power battery 3210 is specifically connected with a charging pile high-voltage negative pole relay 4130 in the charging pile system.
Fig. 5 is a schematic circuit diagram of the second and charging pile system connection of an embodiment of the charging pile relay diagnostic system disclosed in the embodiment of the present invention, as shown in fig. 5, when the charging pile system includes charging pile high-voltage positive relay 5120, the first end of the vehicle end high-voltage positive charging relay 3220 is connected with the sampling end of the high-voltage sampling circuit 3240 and the output end of the high-voltage current limiting module 3250, and is specifically connected with the charging pile high-voltage positive relay 5120 in the charging pile system when charging.
The above description is directed to two common cases, and it should not be understood that the embodiments of the present invention can only address the two cases.
The charging pile relay diagnosis system shown in fig. 3 includes a vehicle-side high-voltage positive charging relay, and in other embodiments, may further include a vehicle-side high-voltage negative charging relay, which is described below with reference to fig. 6.
Fig. 6 is the circuit schematic diagram of another embodiment of the electric pile relay diagnostic system that fills disclosed in the embodiment of the utility model, as shown in fig. 6, fill electric pile relay diagnostic system and include: the system comprises a vehicle-end high-voltage positive electrode charging relay 6220, a power battery 6210, a vehicle-end high-voltage positive electrode charging relay 6230, a high-voltage sampling circuit 6240 and a high-voltage current limiting module 6250;
a first end of the vehicle-end high-voltage positive charging relay 6220 is connected with a sampling end of the high-voltage sampling circuit 6240 and an output end of the high-voltage current limiting module 6250, and is connected with a charging pile system (not shown in the figure) during charging, and a second end of the vehicle-end high-voltage positive charging relay 6220 is connected with a positive electrode of the power battery 6210;
a first end of the vehicle-end high-voltage negative charging relay 6230 is connected with a charging pile system (not shown in the figure) and is grounded when being charged, and a second end of the vehicle-end high-voltage negative charging relay 6230 is connected with a negative electrode of the power battery 210;
the sampling end of the high-voltage sampling circuit 6240 is connected with the first end of the vehicle-end high-voltage positive charging relay 6220 and the output end of the high-voltage current limiting module 6250, and is connected with a charging pile system (not shown in the figure) during charging, and the grounding end of the high-voltage sampling circuit 6240 is grounded;
the output end of the high-voltage current limiting module 6250 is connected to the sampling end of the high-voltage sampling circuit 6240 and the first end of the vehicle-end high-voltage positive charging relay 6220, and is connected to a charging pile system (not shown in the figure) during charging, and the input end of the high-voltage current limiting module 6250 is connected to the positive electrode of the power battery 6210.
The high voltage current limiting module 6250 may be embodied as shown in fig. 2, and will not be described herein.
Two specific situations of the charging pile relay diagnosis system in use are described below with reference to fig. 7 and 8, where the two situations are:
case 1: the charging pile system comprises a charging pile high-voltage positive relay 7120 and a charging pile high-voltage negative relay 7130;
case 2: the charging pile system comprises a charging pile high-voltage positive relay 8120.
Fig. 7 is a first schematic circuit diagram of a charging pile system according to another embodiment of the charging pile relay diagnosis system disclosed in the embodiment of the present invention, as shown in fig. 7, when the charging pile system includes a charging pile high-voltage positive relay 7120 and a charging pile high-voltage negative relay 7130, a first end of the vehicle-end high-voltage positive charging relay 6220 is connected to a sampling end of the high-voltage sampling circuit 6240 and an output end of the high-voltage current limiting module 6250, and is specifically connected to the charging pile high-voltage positive relay 7120 in the charging pile system during charging;
the first end of the vehicle-end high-voltage negative charging relay 6230 is grounded while being connected to the charging pile high-voltage negative relay 7130 during charging.
Fig. 8 is the second kind of and the circuit schematic diagram that fills electric pile system of another embodiment of electric pile relay diagnostic system disclosed in the embodiment, as shown in fig. 8, when filling electric pile system including filling electric pile high pressure positive pole relay 8120, vehicle end high pressure positive pole charging relay 6220's first end is connected with high pressure sampling circuit 6240's sampling end and high pressure current limiting module 6250's output to concrete and the electric pile high pressure positive pole relay 8120 that fills in the electric pile system is connected when charging.
The above description is directed to two common cases, and it should not be understood that the embodiments of the present invention can only address the two cases.
The embodiment of the utility model provides a still disclose a vehicle, this vehicle includes any kind of above-mentioned electric pile relay diagnostic's of filling embodiment.
The charging pile relay diagnosis system and the vehicle disclosed by the embodiment of the invention are described in detail above, and the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the above embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (6)
1. A charging post relay diagnostic system, comprising: the system comprises a vehicle end high-voltage positive electrode charging relay, a power battery, a high-voltage sampling circuit and a high-voltage current limiting module;
the first end of the vehicle end high-voltage positive charging relay is connected with the sampling end of the high-voltage sampling circuit and the output end of the high-voltage current limiting module and is connected with the charging pile system during charging, and the second end of the vehicle end high-voltage positive charging relay is connected with the positive electrode of the power battery;
the positive electrode of the power battery is connected with the second end of the high-voltage positive charging relay at the vehicle end, and the negative electrode of the power battery is connected with the charging pile system during charging;
the sampling end of the high-voltage sampling circuit is connected with the first end of a high-voltage positive charging relay at the vehicle end and the output end of the high-voltage current limiting module, and is connected with a charging pile system during charging, and the grounding end of the high-voltage sampling circuit is grounded;
the output end of the high-voltage current limiting module is connected with the sampling end of the high-voltage sampling circuit and the first end of the high-voltage positive charging relay at the vehicle end and is connected with a charging pile system during charging, and the input end of the high-voltage current limiting module is connected with the positive electrode of the power battery.
2. The charging pile relay diagnostic system of claim 1, wherein: the vehicle-end high-voltage negative electrode charging relay is used for connecting the negative electrode of the power battery to the charging pile system;
the first end of the vehicle end high-voltage negative pole charging relay is grounded and is connected with a charging pile system when charging, and the second end of the vehicle end high-voltage negative pole charging relay is connected with the negative pole of the power battery.
3. The charging pile relay diagnosis system according to any one of claims 1 or 2, characterized in that:
the high voltage current limiting module includes: a current limiting resistor, a diode and a change-over switch;
the first end of the current limiting resistor is connected with the positive electrode of the power battery;
the second end of the current-limiting resistor is connected with the anode of the diode;
the cathode of the diode is connected with the first end of the change-over switch;
and the second end of the change-over switch is the output end of the high-voltage current limiting module.
4. The charging pile relay diagnostic system of claim 1, wherein:
the negative pole of power battery specifically is used for filling the electric pile high pressure negative pole relay with in filling the electric pile system and is connected when charging.
5. The charging pile relay diagnostic system of claim 2, wherein:
the negative electrode of the power battery is connected to a charging pile high-voltage negative electrode relay in a charging pile system through a vehicle end high-voltage negative electrode charging relay during charging;
the first end of the vehicle end high-voltage negative pole charging relay is grounded and is connected with a charging pile high-voltage negative pole relay in a charging pile system when charging.
6. A vehicle, characterized in that: comprising a charging pile relay diagnostic system according to any one of claims 1-5.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020200214603 | 2020-01-06 | ||
| CN202020021460 | 2020-01-06 |
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| Publication Number | Publication Date |
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| CN212950143U true CN212950143U (en) | 2021-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020367510.3U Active CN212950143U (en) | 2020-01-06 | 2020-03-20 | Charging pile relay diagnosis system and vehicle |
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| CN (1) | CN212950143U (en) |
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- 2020-03-20 CN CN202020367510.3U patent/CN212950143U/en active Active
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