CN115447388A - High-voltage interlocking device capable of achieving accurate positioning and judgment method - Google Patents
High-voltage interlocking device capable of achieving accurate positioning and judgment method Download PDFInfo
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- CN115447388A CN115447388A CN202211004921.6A CN202211004921A CN115447388A CN 115447388 A CN115447388 A CN 115447388A CN 202211004921 A CN202211004921 A CN 202211004921A CN 115447388 A CN115447388 A CN 115447388A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000004088 simulation Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 238000013024 troubleshooting Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a high-voltage interlocking device with accurate positioning and a judgment method, comprising a controller power supply, a controller internal resistor, a high-voltage equipment connecting area and a voltage acquisition module; the internal resistor of the controller is connected with the high-voltage equipment connection area in series; the voltage acquisition modules are arranged at the positive end and the negative end of the high-voltage equipment connection area and used for acquiring the voltage of the high-voltage equipment connection area; a plurality of high-voltage connector interlocking terminals and wiring resistors corresponding to the high-voltage connector interlocking terminals are arranged in the high-voltage equipment connecting area; the high-voltage connector interlocking terminals are connected in series, the high-voltage connectors are connected with the corresponding wiring resistors in parallel, and the resistance values of the wiring resistors are different; compared with the prior art, the method can accurately position detailed fault connection points without detecting all high-voltage connection points, greatly reduces the after-sale workload, and avoids secondary faults caused by maintenance.
Description
Technical Field
The invention relates to the technical field of electric safety of electric automobiles and parts thereof, in particular to a high-voltage interlocking device capable of accurately positioning and a judgment method.
Background
With the continuous popularization of new energy automobiles, the electrical safety problem of electric automobiles and parts thereof is particularly important; in particular, high-voltage electrical safety is closely related to the life and property safety of consumers; the method aims at early warning of faults of the high-voltage connection system, and avoids serious loss caused by continuous expansion of the connection fault problem of high-voltage equipment; meanwhile, the fault position can be accurately positioned, and the fault problem can be quickly and accurately processed.
In the existing scheme, as shown in fig. 1, all high-voltage connectors (PLUG 1-PLUG 5) are in a connection and conduction state under a normal condition, and the voltage acquired by an I/O level acquisition port of an ECU is 0V; if any one or more than one of the high-voltage connectors (PLUG 1-PLUG 5) in the figure 1 are disconnected, the voltage collected by an I/O level collecting port of the ECU is 5V;
the scheme can achieve the purpose of detecting faults, but the specific disconnected high-voltage connector plug cannot be accurately positioned, so that the difficulty and uncertainty of troubleshooting exist; it is imperative that all high voltage connections be investigated once, so that multiple disconnections of the high voltage connections also lead to other problems and reduce the life of the connector.
Disclosure of Invention
The invention aims to provide a high-voltage interlocking device with accurate positioning and a judgment method, so as to overcome the defects in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention discloses a high-voltage interlocking device capable of being accurately positioned, which comprises a controller power supply, a controller internal resistor, a high-voltage equipment connecting area and a voltage acquisition module, wherein the controller power supply is connected with the controller internal resistor;
the internal resistor of the controller is connected with the high-voltage equipment connecting area in series and is powered by the controller power supply to form a loop;
the voltage acquisition modules are arranged at the positive end and the negative end of the high-voltage equipment connection area and used for acquiring the voltage of the high-voltage equipment connection area;
a plurality of high-voltage connector interlocking terminals and wiring resistors corresponding to the high-voltage connector interlocking terminals are arranged in the high-voltage equipment connecting area; the high-voltage connector interlocking terminals are connected in series, the high-voltage connectors are connected with the corresponding wiring resistors in parallel, and the resistance values of the wiring resistors are different from each other.
Preferably, the number of the high voltage connector interlock terminals is 5.
Preferably, the voltage acquisition module specifically includes one of an FCU, an HMS, a voltage sensor, or a current-voltage sensor.
The invention discloses a high-voltage interlocking judgment method for accurate positioning, which specifically comprises the following steps:
s1, determining the voltage of a power supply of a controller, the resistance value of a resistor inside the controller, the number of high-voltage connector interlocking terminals in a high-voltage equipment connecting area and the resistance values of wiring resistors corresponding to the high-voltage connector interlocking terminals;
s2, the controller power supply starts to supply power;
s3, a voltage acquisition module acquires the voltage of a high-voltage equipment connection area;
s4, judging whether the voltage of the high-voltage equipment connecting area is 0V or not;
s41, if the voltage is 0V, indicating that the high-voltage connector interlocking terminal in the high-voltage equipment connecting area is in a closed state, and returning to the step S2;
s42, if the voltage is not 0V, calculating the total resistance value in the high-voltage equipment connection area according to the acquired voltage value; and accurately positioning the high-voltage connector interlocking terminals in a disconnected state by combining the resistance values of the wiring resistors corresponding to the high-voltage connector interlocking terminals.
Preferably, step S1 further comprises the following operations: calculating the voltage of a connection area of high-voltage equipment when any one or more high-voltage connector interlocking terminals are in a disconnected state, and preparing a relation table of the disconnected state and the voltage; step S42 specifically includes the following operations: and inquiring a relation table between the disconnection state and the voltage according to the acquired voltage value, and accurately positioning the high-voltage connector interlocking terminal in the disconnection state.
Preferably, the connection state of the interlock terminal of the high-voltage connector is represented by a binary number in the relation table of the disconnection state and the voltage.
The invention has the beneficial effects that:
1. the safety of a high-voltage system is improved; when the virtual connection/release condition occurs at the high-voltage connection point, the problem can be quickly found, and potential safety hazards caused by the virtual connection/release condition are avoided;
2. accurately positioning to reach a specific fault point; after a fault occurs, a specific fault point can be accurately positioned, the time for troubleshooting after sale is reduced, and the maintenance efficiency is greatly improved;
3. the incidence of secondary failure is reduced; after the scheme is used for accurately positioning the fault point, the fault point can be maintained at a fixed point, other connection points do not need to be checked due to troubleshooting, and secondary damage caused by plugging and unplugging in the checking process is avoided.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a connection circuit of a prior art high voltage connector;
FIG. 2 is a schematic circuit diagram of a precisely positioned high voltage interlock device of the present invention;
FIG. 3 is a flow chart of a method for accurately determining high-voltage interlock according to the present invention;
FIG. 4 shows simulation results for one of the cases of single point disconnection according to an embodiment of the present invention;
FIG. 5 is a simulation result of one of the two-point disconnection embodiments of the present invention;
FIG. 6 is a simulation result for one of the three-point disconnects of the embodiments of the present invention;
FIG. 7 is a simulation result for one of four open points according to an embodiment of the present invention;
FIG. 8 is a simulation result of a five-point break according to an embodiment of the present invention;
fig. 9 shows the result of the normal connection simulation according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Referring to fig. 2, the present invention provides a high-voltage interlock device with precise positioning:
the Plug1/Plug2/Plug3/Plug4/Plug5 is a high-voltage connector interlocking terminal, an interlocking terminal switch is in a closed state under the condition that the connector is reliably connected, and the interlocking terminal is in an open state under the condition that the connector is connected or disconnected;
r8: a pull-up resistor is integrated in the controller;
r9: the plug5 corresponds to a wiring resistor and is actually connected with the interlocking terminal of the plug5 in parallel;
r10: the plug4 corresponds to a wiring resistor and is actually connected with the interlocking terminal of the plug4 in parallel;
r11: the plug3 corresponds to a wiring resistor and is actually connected with the interlocking terminal of the plug3 in parallel;
r12: the plug2 corresponds to the wiring resistor and is actually connected with the interlocking terminal of the plug2 in parallel;
r13: the plug1 corresponds to the wiring resistor and is actually connected with the interlocking terminal of the plug1 in parallel;
VCC: the power supply of the controller supplies power to the inside of the controller
GND: a ground line;
VolProbe, a voltage acquisition module and a voltage signal acquisition point;
the connection mode of the device is as follows: connected as shown in the schematic diagram of fig. 2;
the working principle is as follows: this return circuit supplies power for whole return circuit through the VCC, and the controller is through the voltage value of gathering the VolProbe position, and the equivalent resistance value of plug1 to the whole return circuit of plug5 is calculated to the equivalence, carries out the software according to the equivalent resistance value that calculates again and R9/R10/R11/R12/R13 and compares, judges the connection status of each high voltage connector, comes accurate location connector breakpoint.
The calculation formula and the method are as follows:
u0 is the voltage value of the VolProbe point; rx is the equivalent total resistance of R9/R10/R11/R12/R13;
referring to fig. 3, the invention relates to a high-voltage interlock judgment method with accurate positioning, which specifically comprises the following steps:
s1, determining the voltage of a power supply of a controller, the resistance value of a resistor inside the controller, the number of high-voltage connector interlocking terminals in a high-voltage equipment connecting area and the resistance values of wiring resistors corresponding to the high-voltage connector interlocking terminals;
s2, the controller power supply starts to supply power;
s3, a voltage acquisition module acquires the voltage of a high-voltage equipment connection area;
s4, judging whether the voltage of the high-voltage equipment connecting area is 0V or not;
s41, if the voltage is 0V, the high-voltage connector interlocking terminal in the high-voltage equipment connecting area is in a closed state, and the step S2 is returned;
s42, if the voltage is not 0V, calculating the total resistance value in the high-voltage equipment connection area according to the acquired voltage value; and accurately positioning the high-voltage connector interlocking terminals in a disconnected state by combining the resistance values of the wiring resistors corresponding to the high-voltage connector interlocking terminals.
In a possible embodiment, step S1 further includes the following operations: calculating the voltage of a high-voltage equipment connecting area when any one or more high-voltage connector interlocking terminals are in a disconnected state, and preparing a relation table of the disconnected state and the voltage; step S42 specifically includes the following operations: and inquiring a relation table between the disconnection state and the voltage according to the acquired voltage value, and accurately positioning the high-voltage connector interlocking terminal in the disconnection state.
In one possible embodiment, the connection state of the interlock terminal of the high-voltage connector is represented by a binary number in the relation table of the disconnection state and the voltage.
Example (b):
the number of the high-voltage connector interlocking terminals in the embodiment of the invention is 5, R8=3k Ω, R9=3.16k Ω, R10=1.6k Ω, R11=806 Ω, R12=405 Ω, and R13=200 Ω; VCC is equal to 5V;
FIG. 4 is a graph of simulation results for one of the cases of single point disconnection; specifically, all the conditions are shown in the table one below, wherein 0 represents normal connection of the plug, 1 represents virtual connection/disconnection of the plug, and the table below represents resistance values acquired at two ends of a single plug virtual connection/disconnection Rx; the controller can carry out binary number conversion according to the acquired analog quantity value, and then accurately positions the disconnection position.
FIG. 5 is a graph of simulation results for one case where two points are disconnected; in all cases, as shown in table two below, the two interlock point disconnect test:
FIG. 6 is a graph of simulation results for one of the three-point breaks; the specific overall situation is as shown in table three below, for three interlock point disconnect tests:
watch III
FIG. 7 is a graph of simulation results for one of four open points; the specific overall situation is shown in table four below for four interlock point disconnection tests:
watch four
Fig. 8 is a diagram showing a simulation result of five-point disconnection; as shown in table five below, for five interlock point disconnect tests:
watch five
Fig. 9 shows the simulation result of the normal connection according to the embodiment.
Compared with the prior art, the problem that this technique needs to be solved need not detect to all high-pressure tie points for can pinpoint detailed trouble tie point, very big reduction after-sales work load, avoided because overhauls the emergence that leads to secondary failure.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the invention is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (6)
1. The utility model provides a high pressure interlock of accurate location which characterized in that: the device comprises a controller power supply, a controller internal resistor, a high-voltage equipment connecting area and a voltage acquisition module;
the internal resistor of the controller is connected with the high-voltage equipment connecting area in series and is powered by the controller power supply to form a loop;
the voltage acquisition modules are arranged at the positive end and the negative end of the high-voltage equipment connection area and are used for acquiring the voltage of the high-voltage equipment connection area;
a plurality of high-voltage connector interlocking terminals and wiring resistors corresponding to the high-voltage connector interlocking terminals are arranged in the high-voltage equipment connecting area; the high-voltage connector interlocking terminals are connected in series, the high-voltage connectors are connected with the corresponding wiring resistors in parallel, and the resistance values of the wiring resistors are different from each other.
2. A precisely positioned high pressure interlock as recited in claim 1, wherein: the number of the high-voltage connector interlocking terminals is 5.
3. A precisely positioned high pressure interlock as recited in claim 1, wherein: the voltage acquisition module specifically comprises one of an FCU, an HMS, a voltage sensor or a current-voltage sensor.
4. The high-voltage interlocking judgment method for accurate positioning is characterized by comprising the following steps:
s1, determining the voltage of a power supply of a controller, the resistance value of a resistor inside the controller, the number of high-voltage connector interlocking terminals in a high-voltage equipment connecting area and the resistance values of wiring resistors corresponding to the high-voltage connector interlocking terminals;
s2, the power supply of the controller starts to supply power;
s3, a voltage acquisition module acquires the voltage of a high-voltage equipment connection area;
s4, judging whether the voltage of the high-voltage equipment connecting area is 0V or not;
s41, if the voltage is 0V, the high-voltage connector interlocking terminal in the high-voltage equipment connecting area is in a closed state, and the step S2 is returned;
s42, if the voltage is not 0V, calculating the total resistance value in the high-voltage equipment connection area according to the acquired voltage value; and accurately positioning the high-voltage connector interlocking terminals in a disconnected state by combining the resistance values of the wiring resistors corresponding to the high-voltage connector interlocking terminals.
5. The method for judging high-voltage interlocking with accurate positioning as claimed in claim 4, wherein: the step S1 further includes the following operations: calculating the voltage of a high-voltage equipment connecting area when any one or more high-voltage connector interlocking terminals are in a disconnected state, and preparing a relation table of the disconnected state and the voltage; step S42 specifically includes the following operations: and inquiring a relation table between the disconnection state and the voltage according to the acquired voltage value, and accurately positioning the high-voltage connector interlocking terminal in the disconnection state.
6. The method for judging high-voltage interlocking with accurate positioning as claimed in claim 5, wherein: and the connection state of the interlocking terminal of the high-voltage connector is represented by binary numbers in the relation table of the disconnection state and the voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211004921.6A CN115447388A (en) | 2022-08-22 | 2022-08-22 | High-voltage interlocking device capable of achieving accurate positioning and judgment method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211004921.6A CN115447388A (en) | 2022-08-22 | 2022-08-22 | High-voltage interlocking device capable of achieving accurate positioning and judgment method |
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| CN115447388A true CN115447388A (en) | 2022-12-09 |
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| CN109507564A (en) * | 2018-11-14 | 2019-03-22 | 苏州绿控传动科技股份有限公司 | A kind of new energy overall height pressure interlock detection circuit and corresponding detection method |
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| CN210526306U (en) * | 2019-08-30 | 2020-05-15 | 蜂巢能源科技有限公司 | High-voltage interlocking detection circuit and electric automobile |
| CN112428824A (en) * | 2020-12-03 | 2021-03-02 | 桑顿新能源科技有限公司 | High-voltage interlocking detection circuit, detection method of disconnection position and control unit |
| CN112721645A (en) * | 2021-01-28 | 2021-04-30 | 上海汽车集团股份有限公司 | High-voltage interlocking detection circuit and detection method for electric automobile |
| CN112776606A (en) * | 2021-02-22 | 2021-05-11 | 北京汽车集团越野车有限公司 | High-voltage interlocking loop and detection method and device thereof |
| EP3951413A1 (en) * | 2020-06-12 | 2022-02-09 | Contemporary Amperex Technology Co., Limited | High-voltage interlocking apparatus and detection method therefor |
| CN216870706U (en) * | 2022-02-16 | 2022-07-01 | 上海桔晟科技有限公司 | High-voltage interlocking detection circuit |
-
2022
- 2022-08-22 CN CN202211004921.6A patent/CN115447388A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105270184A (en) * | 2015-10-26 | 2016-01-27 | 北京新能源汽车股份有限公司 | Electric automobile and high-low voltage interlocking detection circuit thereof |
| CN108058599A (en) * | 2017-12-14 | 2018-05-22 | 重庆长安汽车股份有限公司 | A kind of automobile and its high-voltage interlocking detection circuit |
| CN208872819U (en) * | 2018-08-21 | 2019-05-17 | 浙江吉利汽车研究院有限公司 | A kind of high-voltage interlocking fault detection means |
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| EP3951413A1 (en) * | 2020-06-12 | 2022-02-09 | Contemporary Amperex Technology Co., Limited | High-voltage interlocking apparatus and detection method therefor |
| CN112428824A (en) * | 2020-12-03 | 2021-03-02 | 桑顿新能源科技有限公司 | High-voltage interlocking detection circuit, detection method of disconnection position and control unit |
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Application publication date: 20221209 |