CN111999592A - Circuit and device for detecting position of disconnection point of high-voltage interlocking circuit - Google Patents
Circuit and device for detecting position of disconnection point of high-voltage interlocking circuit Download PDFInfo
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- CN111999592A CN111999592A CN202010667799.5A CN202010667799A CN111999592A CN 111999592 A CN111999592 A CN 111999592A CN 202010667799 A CN202010667799 A CN 202010667799A CN 111999592 A CN111999592 A CN 111999592A
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Abstract
The invention discloses a circuit and a device for detecting the position of a disconnection point of a high-voltage interlocking loop, relating to the field of new energy automobiles, wherein the circuit comprises: a power source; the high-voltage interlocking circuit is electrically connected with a power supply; the high-voltage interlocking circuit comprises a plurality of high-voltage connectors which are electrically connected with a power supply and integrated with high-voltage interlocking terminals, each high-voltage connector is provided with a male end connector and a female end connector which are electrically connected with each other, the male end connectors of the plurality of high-voltage connectors are connected in series, and the input terminal of the female end connector on each high-voltage connector is electrically connected with the output terminal of the female end connector; the disconnection point detection circuit is electrically connected with the high-voltage interlocking circuit; the disconnection point detection circuit comprises a plurality of disconnection point detection resistors electrically connected with the power supply, and the plurality of disconnection point detection resistors are electrically connected with the female end connectors of the plurality of high-voltage connectors. The invention can quickly identify the position of the disconnection point, avoids manually plugging and unplugging the high-voltage connectors one by one to determine the position of the disconnection point, and improves the diagnosis efficiency.
Description
Technical Field
The invention relates to the field of new energy automobiles, in particular to a circuit and a device for detecting the position of a broken line point of a high-voltage interlocking circuit.
Background
The high-voltage interlocking loop is a circuit used for detecting whether the high-voltage connector is connected reliably on the new energy automobile. The current new energy automobile high-voltage interlocking loop is composed of an input/output interlocking terminal integrated on a male end high-voltage connector, an input/output interlocking terminal integrated on a female end high-voltage connector and a current-limiting resistor.
The circuit can only detect whether the high-voltage interlocking circuit is broken or not and whether each high-voltage connector is reliably inserted or not, but cannot exactly distinguish the broken point of the high-voltage interlocking circuit to determine the loosened high-voltage connector.
Once the condition that the high-voltage interlocking loop is broken due to looseness of the high-voltage connector occurs, the high-voltage connectors need to be pulled out and plugged one by one to be checked, and the checking efficiency is very low.
Disclosure of Invention
The invention aims to overcome the defects of the background technology, and provides a circuit and a device for detecting the position of a disconnection point of a high-voltage interlocking circuit, which can quickly identify the position of the disconnection point, avoid manually plugging and unplugging high-voltage connectors one by one to determine the position of the disconnection point, and improve the diagnosis efficiency.
In a first aspect, a circuit for detecting a disconnection point position of a high-voltage interlock circuit is provided, which includes:
a power source;
a high voltage interlock circuit electrically connected to the power supply; the high-voltage interlocking circuit comprises a plurality of high-voltage connectors which are electrically connected with the power supply and integrated with high-voltage interlocking terminals, each high-voltage connector is provided with a male end connector and a female end connector which are electrically connected with each other, the male end connectors of the high-voltage connectors are connected in series, and the input terminal of the female end connector on each high-voltage connector is electrically connected with the output terminal of the female end connector;
the disconnection point detection circuit is electrically connected with the high-voltage interlocking circuit; the disconnection point detection circuit comprises a plurality of disconnection point detection resistors electrically connected with the power supply, and the plurality of disconnection point detection resistors are electrically connected with the female end connectors of the high-voltage connectors.
According to the first aspect, in a first possible implementation manner of the first aspect, two ends of the high-voltage interlock circuit are respectively set as a P end and an N end, a positive electrode of the power supply is electrically connected to the P end, a negative electrode of the power supply is electrically connected to the N end, and the plurality of disconnection point detection resistors are all electrically connected to the N end;
the circuit for detecting the position of the disconnection point of the high-voltage interlocking circuit further comprises a current-limiting sampling resistor which is arranged on the high-voltage interlocking circuit and the resistance value of the P end of the high-voltage interlocking circuit is R, the input end of the current-limiting sampling resistor is electrically connected with the positive electrode of the power supply, and the output end of the current-limiting sampling resistor is electrically connected with the first high-voltage connector of the high-voltage interlocking circuit.
According to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the method further includes:
the resistance detection module is electrically connected with the P end and the N end in a one-to-one correspondence mode, and is used for detecting the PN end resistance R between the P end and the N endPNAnd the disconnection point detection resistor is positioned between the P end and the N end;
a signal processing module electrically connected with the resistance detection module and used for receiving the PN end resistance RPNAnd connecting the resistance value R of the PN endPNAnd comparing the position with a preset resistance value to obtain an analysis result of the position of the broken line of the high-voltage interlocking loop.
According to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, when the resistance value detection module detects RPNWhen the voltage is equal to R, the signal processing module gives out an analysis result that all the high-voltage connectors are normally connected;
when the resistance value detection module detects RPNWhen the fault is infinite, the analysis result given by the signal processing module is a first connection fault of the high-voltage connector;
when the resistance value detection module detects
When the high-voltage connector is in failure, the analysis result given by the signal processing module is the mth high-voltage connector connection failureM is an integer greater than or equal to 1 and less than or equal to S, and S is the total number of the high-voltage connectors in the high-voltage interlocking circuit.
According to the first possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the method further includes:
the voltage detection module is arranged at the P end of the high-voltage interlocking circuit, is connected with the current-limiting sampling resistor in parallel and is used for detecting the voltage value U of the current-limiting sampling resistorR；
A signal analysis module electrically connected with the voltage detection module and used for receiving the voltage value U of the current-limiting sampling resistorRAnd applying the voltage value URAnd comparing the voltage value with a preset voltage value to obtain an analysis result of the position of the broken line point of the high-voltage interlocking loop.
According to a fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, when the voltage detection module detects URWhen the voltage value of the power supply is U, the signal analysis module obtains an analysis result that all the high-voltage connectors are normally connected, wherein U is the voltage value of the power supply;
when the voltage detection module detects URWhen the voltage is 0, the analysis result obtained by the signal analysis module is a first connection fault of the high-voltage connector;
when the voltage detection module detects
And then, the analysis result obtained by the signal analysis module is the mth connection fault of the high-voltage connector, m is an integer which is more than or equal to 1 and less than or equal to S, and S is the total number of the high-voltage connectors in the high-voltage interlocking circuit.
According to the first aspect, in a sixth possible implementation manner of the first aspect, in S high-voltage connectors connected in series in sequence, an output terminal of the male end connector of the ith high-voltage connector is electrically connected to an input terminal of the male end connector of the (i + 1) th high-voltage connector, where S is the total number of the high-voltage connectors in the high-voltage interlock circuit, and i is an integer greater than or equal to 1 and less than or equal to S.
According to a sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the input terminal of the male end connector of each high-voltage connector is electrically connected with the input terminal of the female end connector, and the output terminal of the male end connector is electrically connected with the output terminal of the female end connector; or the like, or, alternatively,
the input terminal of the male end connector of each high-voltage connector is electrically connected with the output terminal of the female end connector, and the output terminal of the male end connector is electrically connected with the input terminal of the female end connector.
According to the first aspect, in an eighth possible implementation manner of the first aspect, the input terminal of the female connector of each high-voltage connector is grounded through the disconnection point detection resistor;
each of the disconnection point detection resistors is electrically connected to at most one of the female connectors of the high-voltage connector.
In a second aspect, an apparatus for detecting a position of a disconnection point of a high-voltage interlock circuit is provided, which includes the circuit for detecting a position of a disconnection point of a high-voltage interlock circuit as described above.
Compared with the prior art, the method can quickly identify the position of the disconnection point, avoids manually plugging and unplugging the high-voltage connector one by one to determine the position of the disconnection point, and improves the diagnosis efficiency.
Drawings
FIG. 1 is a schematic diagram of one embodiment of a circuit for detecting a position of a disconnection point of a high-voltage interlock circuit according to the present invention;
FIG. 2 is an electrical schematic of a high voltage interlock loop;
FIG. 3 is a schematic diagram of another embodiment of a circuit for detecting a disconnection point location of a high-voltage interlock circuit according to the present invention;
FIG. 4 is a schematic diagram of another embodiment of the circuit for detecting the position of the disconnection point of the high-voltage interlock circuit according to the present invention.
Description of the drawings:
110. a resistance value detection module; 120. a signal processing module; 210. a voltage detection module; 220. and a signal analysis module.
Detailed Description
Reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in conjunction with the specific embodiments, it will be understood that they are not intended to limit the invention to the embodiments described. On the contrary, it is intended to cover alternatives, modifications, and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims. It should be noted that the method steps described herein may be implemented by any functional block or functional arrangement, and that any functional block or functional arrangement may be implemented as a physical entity or a logical entity, or a combination of both.
In order that those skilled in the art will better understand the present invention, the following detailed description of the invention is provided in conjunction with the accompanying drawings and the detailed description of the invention.
Note that: the example to be described next is only a specific example, and does not limit the embodiments of the present invention necessarily to the following specific steps, values, conditions, data, orders, and the like. Those skilled in the art can, upon reading this specification, utilize the concepts of the present invention to construct more embodiments than those specifically described herein.
Referring to fig. 1, an embodiment of the present invention provides a circuit for detecting a disconnection point position of a high-voltage interlock circuit, including:
a power source;
the high-voltage interlocking circuit is electrically connected with a power supply; the high-voltage interlocking circuit comprises a plurality of high-voltage connectors which are electrically connected with a power supply and integrated with high-voltage interlocking terminals, each high-voltage connector is provided with a male end connector and a female end connector which are electrically connected with each other, the male end connectors of the plurality of high-voltage connectors are connected in series, and the input terminal of the female end connector on each high-voltage connector is electrically connected with the output terminal of the female end connector;
the disconnection point detection circuit is electrically connected with the high-voltage interlocking circuit; the disconnection point detection circuit comprises a plurality of disconnection point detection resistors electrically connected with the power supply, and the plurality of disconnection point detection resistors are electrically connected with the female end connectors of the plurality of high-voltage connectors.
Specifically, an electrical schematic diagram of a currently existing high-voltage interlock circuit is shown in fig. 2, and includes a high-voltage interlock circuit and a current-limiting sampling resistor. The high-voltage interlocking circuit comprises a plurality of high-voltage connectors integrated with high-voltage interlocking terminals, each high-voltage connector comprises a male end connector and a female end connector which are electrically connected with each other, the male end connectors of each high-voltage connector are connected in series, and the input terminal of the female end connector of each high-voltage connector is electrically connected with the output terminal of the female end connector. The current-limiting sampling resistor is connected in series with a male end connector of the high-voltage connector to play a role in protecting the circuit.
The circuit for detecting the disconnection point position of the high-voltage interlocking circuit comprises a power supply, the high-voltage interlocking circuit and a disconnection point detection circuit. The high-voltage interlocking circuit is electrically connected with a power supply, the high-voltage interlocking circuit comprises a plurality of high-voltage connectors integrated with high-voltage interlocking terminals, a male end connector and a female end connector which are electrically connected with each other are arranged on each high-voltage connector, the male end connectors of all the high-voltage connectors are connected in series, then two ends of each high-voltage connector are electrically connected with the power supply, and the input terminal of the female end connector on each high-voltage connector is electrically connected with the output terminal of the female end connector. The terminals of the female connector on each high voltage connector are not significantly different, and are referred to herein as input and output terminals for ease of understanding. The disconnection point detection circuit is electrically connected with the high-voltage interlocking circuit and comprises a plurality of disconnection point detection resistors electrically connected with the power supply, and the plurality of disconnection point detection resistors are electrically connected with the female-end connectors of the plurality of high-voltage connectors.
This application is through breakpoint detection circuitry and power, and when the high voltage connector trouble disconnection of difference, the circular telegram condition of high-pressure interlocking circuit is different, and the resistance value of circuit is different to can discern the breakpoint position fast, avoid artifical plug high voltage connector confirm the breakpoint position one by one, improve diagnostic efficiency.
Optionally, in another embodiment of the present invention, in S high-voltage connectors connected in series in sequence, an output terminal of the male connector of the ith high-voltage connector is electrically connected to an input terminal of the male connector of the (i + 1) th high-voltage connector, where S is the total number of high-voltage connectors in the high-voltage interlock circuit, and i is an integer greater than or equal to 1 and less than or equal to S.
Specifically, as shown in fig. 1, 11, 21, 31 … … n1 are male connectors of the high-voltage connector, 12, 22, 32 … … n2 are female connectors of the high-voltage connector, a1, a2, A3 … … An are male connector high-voltage interlock terminal input points, B1, B2, B3 … … Bn are male connector high-voltage interlock terminal output points, a1, a2, A3 … … An are female connector high-voltage interlock terminal input points, and B1, B2, B3 … … Bn are female connector high-voltage interlock terminal output points. The male end connectors of the high-voltage connectors are sequentially connected in series, wherein the output terminal of the male end connector of the ith high-voltage connector is electrically connected with the input terminal of the male end connector of the (i + 1) th high-voltage connector. As shown in fig. 1, the output terminal B1 of the male connector 11 is connected to the input terminal a2 of the male connector 21.
Optionally, in another embodiment of the present invention, the input terminal of the male end connector of each of the high voltage connectors is electrically connected to the input terminal of the female end connector, and the output terminal of the male end connector is electrically connected to the output terminal of the female end connector; or the like, or, alternatively,
the input terminal of the male end connector of each high-voltage connector is electrically connected with the output terminal of the female end connector, and the output terminal of the male end connector is electrically connected with the input terminal of the female end connector.
Specifically, the terminals of the female connector on each high-voltage connector are not significantly different, and the input terminal of the male connector of each high-voltage connector can be electrically connected with the input terminal of the female connector and also electrically connected with the output terminal of the female connector.
Optionally, in another embodiment of the present invention, the input terminal of the female connector of each high-voltage connector is grounded through the disconnection point detection resistor;
each disconnection point detection resistor is electrically connected with at most one female end connector of the high-voltage connector.
Specifically, one end of each disconnection point detection resistor is electrically connected to an input terminal or an output terminal of the female terminal connector of each high-voltage connector, and the other end of each disconnection point detection resistor is grounded (common end), for example, is connected to a vehicle body. Each disconnection point detection resistor is at most electrically connected with the female end connector of one high-voltage connector, namely the female end connectors of a plurality of high-voltage connectors are not commonly connected with the same disconnection point detection resistor, in addition, the disconnection point detection resistor connected with the female end connector of each high-voltage connector can be one or formed by connecting a plurality of resistors in series, and the plurality of resistors are connected in series to form the disconnection point detection resistor.
Another embodiment of the present invention provides a circuit for detecting a disconnection point position of a high-voltage interlock circuit, including:
a power source;
the high-voltage interlocking circuit is electrically connected with a power supply; the high-voltage interlocking circuit comprises a plurality of high-voltage connectors which are electrically connected with a power supply and integrated with high-voltage interlocking terminals, each high-voltage connector is provided with a male end connector and a female end connector which are electrically connected with each other, the male end connectors of the plurality of high-voltage connectors are connected in series, and the input terminal of the female end connector on each high-voltage connector is electrically connected with the output terminal of the female end connector;
the disconnection point detection circuit is electrically connected with the high-voltage interlocking circuit; the disconnection point detection circuit comprises a plurality of disconnection point detection resistors electrically connected with the power supply, and the plurality of disconnection point detection resistors are electrically connected with the female end connectors of the plurality of high-voltage connectors.
The two ends of the high-voltage interlocking circuit are respectively arranged as a P end and an N end, the positive electrode of the power supply is electrically connected with the P end, the negative electrode of the power supply is electrically connected with the N end, and the plurality of disconnection point detection resistors are electrically connected with the N end;
the circuit for detecting the position of the disconnection point of the high-voltage interlocking circuit further comprises a current-limiting sampling resistor, wherein the current-limiting sampling resistor is arranged at the P end of the high-voltage interlocking circuit and has a resistance value of R, the input end of the current-limiting sampling resistor is electrically connected with the positive electrode of a power supply, and the output end of the current-limiting sampling resistor is electrically connected with a first high-voltage connector of the high-voltage interlocking circuit.
Specifically, in this embodiment, two ends of the high-voltage interlock circuit are respectively set as a P end and an N end, an anode of the power supply is electrically connected to the P end, a cathode of the power supply is electrically connected to the N end, one end of each of the plurality of disconnection point detection resistors is electrically connected to a female terminal connector of each of the high-voltage connectors, and the other end is electrically connected to the N end. The circuit for detecting the position of the disconnection point of the high-voltage interlocking circuit further comprises a current-limiting sampling resistor with a resistance value of R, the current-limiting sampling resistor is arranged between a P end (the positive pole of a power supply) and a first high-voltage connector, the input end of the current-limiting sampling resistor is electrically connected with the positive pole of the power supply, and the output end of the current-limiting sampling resistor is electrically connected with the first high-voltage connector of the high-voltage interlocking circuit. The high voltage connector electrically connected to the P terminal (power supply positive electrode) is defined as a first high voltage connector, and then sequentially sorted in the series order of the high voltage connectors.
The current-limiting sampling resistor is arranged between the P end (the positive electrode of the power supply) and the first high-voltage connector, on one hand, the current-limiting sampling resistor plays a role in current-limiting protection on a high-voltage interlocking circuit, on the other hand, the current-limiting sampling resistor is used as a sampling point, and when any one high-voltage connector fails, the position of a disconnection point is rapidly identified based on the parameter value of the sampling point.
Optionally, as shown in fig. 3, in another embodiment of the present invention, the method further includes:
the resistance value detection module 110, two ends of the resistance value detection module 110 are respectively electrically connected with the P terminal and the N terminal in a one-to-one correspondence manner, and are used for detecting the PN terminal resistance value R between the P terminal and the N terminalPNAnd the disconnection point detection resistor is positioned between the P end and the N end;
a signal processing module 120 electrically connected to the resistance value detection module 110 for receiving the resistance value R of the PN nodePNAnd the resistance R of the PN end is adjustedPNAnd comparing the position with a preset resistance value to obtain an analysis result of the position of the broken line of the high-voltage interlocking loop.
When the resistance value detection module 110 detects RPNWhen the voltage is equal to R, the signal processing module 120 gives an analysis result that all the high-voltage connectors are normally connected;
when the resistance value detection module 110 detects RPNWhen the connection is infinite, the signal processing module 120 gives an analysis result that the first high-voltage connector is in connection failure;
when the resistance value detection module 110 detects
In the meantime, the analysis result given by the signal processing module 120 is the mth high-voltage connector connection fault, where m is an integer greater than or equal to 1 and less than or equal to S, and S is the total number of high-voltage connectors in the high-voltage interlock circuit.
Specifically, in the embodiment, the added resistance detection module 110 is used for detecting the resistance R between the PN terminalsPNThen R is addedPNThe transmission signal processing module 120 performs analysis, and the signal processing module 120 converts RPNAnd comparing the position of the corresponding broken line point with a preset resistance value.
When all high voltage connectors are reliably connected, RPNR; when the first high-voltage connector is not reliably connected (the total number of the high-voltage connectors is s no matter whether the second high-voltage connector to the s-th high-voltage connector is reliably connected or not), RPNIs infinite, that is, when R isPNWhen the connection fault is infinite, only the connection fault of the first high-voltage connector can be judged, and the connection between the second high-voltage connector and the nth high-voltage connector can be normal or fault; similarly, when the first high-voltage connector is reliably connected to the (m-1) th high-voltage connector and the mth high-voltage connector is not reliably connected (no matter whether the (m + 1) th high-voltage connector is reliably connected to the(s) th high-voltage connector or not),
in the same way, when
Meanwhile, when the connection of the first high-voltage connector to the m-1 th high-voltage connector is normal, the connection of the m-th high-voltage connector fails, but the following m-1 th high-voltage connector to the n-th high-voltage connector may be connectedA connection failure may also occur if the connection is normal.
Another embodiment of the present invention provides a circuit for detecting a disconnection point position of a high-voltage interlock circuit, including:
a power source;
the high-voltage interlocking circuit is electrically connected with a power supply; the high-voltage interlocking circuit comprises a plurality of high-voltage connectors which are electrically connected with a power supply and integrated with high-voltage interlocking terminals, each high-voltage connector is provided with a male end connector and a female end connector which are electrically connected with each other, the male end connectors of the plurality of high-voltage connectors are connected in series, and the input terminal of the female end connector on each high-voltage connector is electrically connected with the output terminal of the female end connector;
the disconnection point detection circuit is electrically connected with the high-voltage interlocking circuit; the disconnection point detection circuit comprises a plurality of disconnection point detection resistors electrically connected with the power supply, and the plurality of disconnection point detection resistors are electrically connected with the female end connectors of the plurality of high-voltage connectors.
The two ends of the high-voltage interlocking circuit are respectively arranged as a P end and an N end, the positive electrode of the power supply is electrically connected with the P end, the negative electrode of the power supply is electrically connected with the N end, and the plurality of disconnection point detection resistors are electrically connected with the N end;
the circuit for detecting the position of the disconnection point of the high-voltage interlocking circuit further comprises a current-limiting sampling resistor, wherein the current-limiting sampling resistor is arranged at the P end of the high-voltage interlocking circuit and has a resistance value of R, the input end of the current-limiting sampling resistor is electrically connected with the positive electrode of a power supply, and the output end of the current-limiting sampling resistor is electrically connected with a first high-voltage connector of the high-voltage interlocking circuit.
Optionally, as shown in fig. 4, in another embodiment of the present invention, the method further includes:
a voltage detection module 210, which is arranged at the P end of the high-voltage interlock circuit, is connected with the current-limiting sampling resistor in parallel, and is used for detecting the voltage value U of the current-limiting sampling resistorR；
A signal analysis module 220 electrically connected to the voltage detection module 210 for receiving the voltage value U of the current-limiting sampling resistorRAnd the voltage value U is measuredRAnd comparing the voltage value with a preset voltage value to obtain an analysis result of the position of the broken line point of the high-voltage interlocking loop.
When the voltage detection module 210 detectsMeasure URWhen the voltage value is equal to U, the signal analysis module 220 obtains an analysis result that all the high-voltage connectors are normally connected, where U is the voltage value of the power supply;
when the voltage detection module 210 detects URWhen the value is 0, the analysis result obtained by the signal analysis module 220 is a first high-voltage connector connection fault;
when the voltage detection module 210 detects
Meanwhile, the analysis result obtained by the signal analysis module 220 is the mth high-voltage connector connection fault, m is an integer greater than or equal to 1 and less than or equal to S, and S is the total number of high-voltage connectors in the high-voltage interlock circuit.
Specifically, in this embodiment, the voltage detection module 210 is added for detecting the voltage value U at two ends of the current-limiting sampling resistorRThen put URThe transmission signal analysis module 220 analyzes the transmission signal, and the signal analysis module 220 analyzes the URAnd comparing the voltage value with a preset voltage value to obtain the corresponding position of the broken line point.
When all high voltage connectors are reliably connected, URU is the voltage value of the power supply; when the first high-voltage connector is not reliably connected (the total number of the high-voltage connectors is s no matter whether the second high-voltage connector to the s-th high-voltage connector is reliably connected or not), URIs 0, that is, when U isRWhen the voltage is 0, only the connection fault of the first high-voltage connector can be judged, and the connection between the second high-voltage connector and the nth high-voltage connector can be normal or fault; similarly, when the first high-voltage connector is reliably connected to the (m-1) th high-voltage connector and the mth high-voltage connector is not reliably connected (no matter whether the (m + 1) th high-voltage connector is reliably connected to the(s) th high-voltage connector or not),
in the same way, when
When the first high-voltage connector is connected to the second oneThe m-1 high-voltage connector is normally connected, the m-th high-voltage connector is failed to be connected, but the m-1 high-voltage connector to the n-th high-voltage connector can be normally connected or can be failed to be connected.
Based on the same inventive concept, the embodiment of the application also provides a device for detecting the position of the disconnection point of the high-voltage interlocking circuit, which comprises the circuit for detecting the position of the disconnection point of the high-voltage interlocking circuit.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A circuit for detecting a disconnection point location of a high-voltage interlock circuit, comprising:
a power source;
a high voltage interlock circuit electrically connected to the power supply; the high-voltage interlocking circuit comprises a plurality of high-voltage connectors which are electrically connected with the power supply and integrated with high-voltage interlocking terminals, each high-voltage connector is provided with a male end connector and a female end connector which are electrically connected with each other, the male end connectors of the high-voltage connectors are connected in series, and the input terminal of the female end connector on each high-voltage connector is electrically connected with the output terminal of the female end connector;
the disconnection point detection circuit is electrically connected with the high-voltage interlocking circuit; the disconnection point detection circuit comprises a plurality of disconnection point detection resistors electrically connected with the power supply, and the plurality of disconnection point detection resistors are electrically connected with the female end connectors of the high-voltage connectors.
2. The circuit for detecting the position of the disconnection point of the high-voltage interlocking circuit according to claim 1, wherein two ends of the high-voltage interlocking circuit are respectively set as a P end and an N end, the positive pole of the power supply is electrically connected with the P end, the negative pole of the power supply is electrically connected with the N end, and a plurality of disconnection point detection resistors are electrically connected with the N end;
the circuit for detecting the position of the disconnection point of the high-voltage interlocking circuit further comprises a current-limiting sampling resistor which is arranged on the high-voltage interlocking circuit and the resistance value of the P end of the high-voltage interlocking circuit is R, the input end of the current-limiting sampling resistor is electrically connected with the positive electrode of the power supply, and the output end of the current-limiting sampling resistor is electrically connected with the first high-voltage connector of the high-voltage interlocking circuit.
3. The circuit for detecting a location of a high voltage interlock loop disconnection point of claim 2, further comprising:
the resistance detection module is electrically connected with the P end and the N end in a one-to-one correspondence mode, and is used for detecting the PN end resistance R between the P end and the N endPNAnd the disconnection point detection resistor is positioned between the P end and the N end;
a signal processing module electrically connected with the resistance detection module and used for receiving the PN end resistance RPNAnd connecting the resistance value R of the PN endPNAnd comparing the position with a preset resistance value to obtain an analysis result of the position of the broken line of the high-voltage interlocking loop.
4. The circuit for detecting the position of the disconnection point of the high-voltage interlocking loop as claimed in claim 3, wherein when the resistance value detection module detects RPNWhen the voltage is equal to R, the signal processing module gives out an analysis result that all the high-voltage connectors are normally connected;
when the resistance value detection module detects RPNWhen the fault is infinite, the analysis result given by the signal processing module is a first connection fault of the high-voltage connector;
when the resistance value detection module detects
When the high-voltage connector fails, the analysis result given by the signal processing module is the mth high-voltage connector connection fault, wherein m is greater than or equal to1. And is less than or equal to the integer of S, S is the total number of the high-voltage connectors in the high-voltage interlocking circuit.
5. The circuit for detecting a location of a high voltage interlock loop disconnection point of claim 2, further comprising:
the voltage detection module is arranged at the P end of the high-voltage interlocking circuit, is connected with the current-limiting sampling resistor in parallel and is used for detecting the voltage value U of the current-limiting sampling resistorR；
A signal analysis module electrically connected with the voltage detection module and used for receiving the voltage value U of the current-limiting sampling resistorRAnd applying the voltage value URAnd comparing the voltage value with a preset voltage value to obtain an analysis result of the position of the broken line point of the high-voltage interlocking loop.
6. The circuit for detecting the position of a disconnection point of a high-voltage interlock loop according to claim 5, wherein when the voltage detection module detects U, the circuit detects URWhen the voltage value of the power supply is U, the signal analysis module obtains an analysis result that all the high-voltage connectors are normally connected, wherein U is the voltage value of the power supply;
when the voltage detection module detects URWhen the voltage is 0, the analysis result obtained by the signal analysis module is a first connection fault of the high-voltage connector;
when the voltage detection module detects
And then, the analysis result obtained by the signal analysis module is the mth connection fault of the high-voltage connector, m is an integer which is more than or equal to 1 and less than or equal to S, and S is the total number of the high-voltage connectors in the high-voltage interlocking circuit.
7. The circuit for detecting the position of a disconnection point of a high-voltage interlock circuit according to claim 1, wherein in S high-voltage connectors connected in series in sequence, an output terminal of the male connector of the ith high-voltage connector is electrically connected with an input terminal of the male connector of the (i + 1) th high-voltage connector, wherein S is the total number of the high-voltage connectors in the high-voltage interlock circuit, and i is an integer greater than or equal to 1 and less than or equal to S.
8. The circuit for detecting a disconnection point of a high voltage interlock circuit of claim 7, wherein an input terminal of said male connector of each of said high voltage connectors is electrically connected to an input terminal of said female connector, and an output terminal of said male connector is electrically connected to an output terminal of said female connector; or the like, or, alternatively,
the input terminal of the male end connector of each high-voltage connector is electrically connected with the output terminal of the female end connector, and the output terminal of the male end connector is electrically connected with the input terminal of the female end connector.
9. The circuit for detecting a disconnection point position of a high-voltage interlock circuit according to claim 1, wherein an input terminal of said female connector of each of said high-voltage connectors is grounded through said disconnection point detecting resistor;
each of the disconnection point detection resistors is electrically connected to at most one of the female connectors of the high-voltage connector.
10. A device for detecting the position of a disconnection point of a high-voltage interlock circuit, comprising a circuit for detecting the position of a disconnection point of a high-voltage interlock circuit according to any one of claims 1 to 9.
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