High-voltage interlocking detection circuit, detection method of disconnection position and control unit

文档序号：918602 发布日期：2021-03-02 浏览：2次中文

阅读说明：本技术 高压互锁检测电路、断开位置的检测方法及控制单元 (High-voltage interlocking detection circuit, detection method of disconnection position and control unit ) 是由黄磊徐强严丽吕阶青陈灿赵顺之于 2020-12-03 设计创作，主要内容包括：本申请提供一种高压互锁检测电路、断开位置的检测方法及控制单元,涉及高压互锁电路技术领域。该电路包括：至少一个控制系统、以及每个控制系统对应的多个高压连接器；每个控制系统中的控制单元的两个检测端分别电连接每个控制系统中的检测电阻的两端,高压互锁输入口电连接检测电阻的一端,检测电阻的另一端接地；每个高压连接器的输入接口和输出接口之间并联每个高压连接器对应阻值的电阻；不同高压连接器对应的阻值不同。相对于现有技术,避免了互锁断开位置只能通过人工检测,造成故障排除效率不高的问题。(The application provides a high-voltage interlocking detection circuit, a detection method of a disconnection position and a control unit, and relates to the technical field of high-voltage interlocking circuits. The circuit includes: at least one control system and a plurality of high voltage connectors corresponding to each control system; two detection ends of a control unit in each control system are respectively and electrically connected with two ends of a detection resistor in each control system, a high-voltage interlocking input port is electrically connected with one end of the detection resistor, and the other end of the detection resistor is grounded; a resistor with a corresponding resistance value of each high-voltage connector is connected in parallel between the input interface and the output interface of each high-voltage connector; the resistance values corresponding to different high-voltage connectors are different. Compared with the prior art, the problem that the interlocking disconnection position can only be detected manually, and the fault removal efficiency is not high is solved.)

1. A high voltage interlock detection circuit, comprising: at least one control system and a plurality of high voltage connectors corresponding to each control system; the high-voltage interlocking output port of each control system is electrically connected with the input interface of the first high-voltage connector in the plurality of high-voltage connectors, the output interface of the previous high-voltage connector in the plurality of high-voltage connectors is connected with the input interface of the next high-voltage connector, and the output interface of the last high-voltage connector in the plurality of high-voltage connectors is also electrically connected with the high-voltage interlocking input port of each control system;

the two detection ends of the control unit in each control system are respectively and electrically connected with the two ends of the detection resistor in each control system, the high-voltage interlocking input port is electrically connected with one end of the detection resistor, and the other end of the detection resistor is grounded;

a resistor with a corresponding resistance value of each high-voltage connector is connected in parallel between the input interface and the output interface of each high-voltage connector; the resistance values corresponding to different high-voltage connectors are different.

2. The high voltage interlock detection circuit of claim 1, wherein said at least one control system comprises: a battery management system, the plurality of high voltage connectors to which the battery management system corresponds including: a main positive main negative plug-in, a fast charging plug-in, a slow charging plug-in and an MSD plug-in;

the input interface of the master positive master negative plug-in is electrically connected with the high-voltage interlocking output port of the battery management system, the output interface of the master positive master negative plug-in is electrically connected with the input interface of the fast charging plug-in, the output interface of the fast charging plug-in is electrically connected with the input interface of the slow charging plug-in, the output interface of the slow charging plug-in is electrically connected with the input interface of the MSD plug-in, and the input interface of the MSD plug-in is electrically connected with the high-voltage interlocking input port of the battery management system.

3. The high voltage interlock detection circuit of claim 2, wherein said at least one control system further comprises: the vehicle control unit, vehicle control unit corresponds a plurality of high-voltage connector include: the system comprises an AC plug-in of air conditioning equipment, an OBC plug-in of a vehicle-mounted charger, a cover opening switch plug-in of a high-voltage distribution box, a PTC plug-in of the high-voltage distribution box and a DC-DC plug-in of the high-voltage distribution box;

the input interface of the AC plug-in unit is electrically connected with the high-voltage interlocking output port of the whole vehicle controller, the output interface of the AC plug-in unit is electrically connected with the input interface of the OBC plug-in unit, the output interface of the OBC plug-in unit is electrically connected with the input interface of the cover opening switch plug-in unit, the output interface of the cover opening switch plug-in unit is electrically connected with the input interface of the PTC plug-in unit, the input interface of the PTC plug-in unit is electrically connected with the input interface of the DC-DC conversion plug-in unit, and the output interface of the DC-DC plug-in unit is.

4. The high-voltage interlock detection circuit according to claim 3, wherein the communication interface of the battery management system is further communicatively connected to the communication interface of the vehicle control unit via a CAN bus.

5. The high voltage interlock detection circuit according to any of claims 1-4, wherein the corresponding resistance values of the plurality of high voltage connectors decrease sequentially or increase sequentially from the first high voltage connector to the last high voltage connector.

6. A method for detecting a high-voltage interlock open position, which is applied to a control unit in a high-voltage interlock detection circuit according to any one of claims 1 to 5, the method comprising:

detecting input voltage at two ends of the detection resistor;

when the input voltage is smaller than the output voltage of the high-voltage interlocking output port, determining that a target high-voltage connector with interlocking disconnection exists in the high-voltage connectors according to the input voltage and preset voltages corresponding to the high-voltage connectors, wherein the preset voltage corresponding to each high-voltage connector is the voltage at two ends of the detection resistor when the interlocking disconnection exists in each high-voltage connector.

7. The method for testing according to claim 6, wherein when the plurality of high voltage connectors, the corresponding resistance values decrease sequentially from the first high voltage connector to the last high voltage connector;

the determining that the target high-voltage connector with interlock disconnection exists in the plurality of high-voltage connectors according to the input voltage and the preset voltage corresponding to the plurality of high-voltage connectors includes:

comparing the input voltage with preset voltages corresponding to the plurality of high-voltage connectors;

when the input voltage is smaller than a preset voltage corresponding to the first high-voltage connector, determining that the first high-voltage connector is the target high-voltage connector; alternatively, the first and second electrodes may be,

and when the input voltage is greater than the preset voltage corresponding to the previous high-voltage connector and less than the preset voltage corresponding to the next high-voltage connector, determining the next high-voltage connector as the target high-voltage connector.

8. The method according to claim 6, wherein when the plurality of high voltage connectors, the corresponding resistance values sequentially decrease from the first high voltage connector to the last high voltage connector;

comparing the input voltage with preset voltages corresponding to the plurality of high-voltage connectors;

when the input voltage is smaller than the preset voltage corresponding to the last high-voltage connector, determining that the last high-voltage connector is the target high-voltage connector; alternatively, the first and second electrodes may be,

and when the input voltage is greater than the preset voltage corresponding to the next high-voltage connector and less than the preset voltage corresponding to the previous high-voltage connector, determining that the previous high-voltage connector is the target high-voltage connector.

9. The detection method according to claim 6, further comprising:

and when the input voltage is equal to the output voltage of the high-voltage interlocking output port, determining that no interlocking disconnected high-voltage connector exists in the plurality of high-voltage connectors.

10. A control unit in the high voltage interlock detection circuit according to any one of claims 1 to 5, the control unit comprising:

the voltage detection module is used for detecting input voltages at two ends of the detection circuit;

and the interlocking disconnection detection module is used for determining a target high-voltage connector with interlocking disconnection in the plurality of high-voltage connectors according to the input voltage and the preset voltage corresponding to the plurality of high-voltage connectors when the input voltage is smaller than the output voltage of the high-voltage interlocking output port, wherein the preset voltage corresponding to each high-voltage connector is the voltage at two ends of the detection resistor when the interlocking disconnection exists in each high-voltage connector.

Technical Field

The application relates to the technical field of high-voltage interlocking circuits, in particular to a high-voltage interlocking detection circuit, a detection method of a disconnection position and a control unit.

Background

An abbreviation of High Voltage Interlock Loop (HVIL) is used for high Voltage Interlock Loop. Also called a dangerous Voltage Interlock loop (US7586722High Voltage Interlock System and Control Strategy), High Voltage Interlock refers to checking the electrical connection integrity (continuity) of all the branches connected to the High Voltage bus on the electric vehicle by using a low Voltage signal. If the high-voltage interlocking loop is disconnected in the using process, power supply is continued at the moment, potential safety hazards may exist, and therefore how to detect whether the high-voltage interlocking loop is in a conducting state is an urgent problem to be solved.

The detection mode of the high-voltage interlocking loop in the prior art is generally as follows: the high-voltage interlocking monitoring device is characterized in that a signal source voltage or PWM (pulse width modulation) wave is provided for a high-voltage interlocking loop through a high-voltage interlocking monitor, a low-voltage signal is transmitted along a closed low-voltage loop, then the returned signal voltage is detected, and once the low-voltage signal is interrupted, the fact that one high-voltage connector in the current high-voltage interlocking loop is loosened or falls off is indicated, and the high-voltage interlocking loop is in an open circuit state.

However, such a detection method can only detect whether the high-voltage interlock circuit is in a conducting state or a disconnecting state, cannot detect the position of interlock disconnection, and can only detect the position of interlock disconnection manually, thereby causing a problem of low failure removal efficiency.

Disclosure of Invention

An object of the present application is to provide a high-voltage interlock detection circuit, a method for detecting a disconnection position, and a control unit, which are directed to the deficiencies in the prior art, so as to solve the problem that the interlock disconnection position in the prior art can only be detected manually, which results in low troubleshooting efficiency.

In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:

in a first aspect, an embodiment of the present application provides a high-voltage interlock detection circuit, including: at least one control system and a plurality of high voltage connectors corresponding to each control system; the high-voltage interlocking output port of each control system is electrically connected with the input interface of the first high-voltage connector in the plurality of high-voltage connectors, the output interface of the previous high-voltage connector in the plurality of high-voltage connectors is connected with the input interface of the next high-voltage connector, and the output interface of the last high-voltage connector in the plurality of high-voltage connectors is also electrically connected with the high-voltage interlocking input port of each control system;

Optionally, the at least one control train comprises: a battery management system, the plurality of high voltage connectors to which the battery management system corresponds including: a main positive main negative plug-in, a fast charging plug-in, a slow charging plug-in and an MSD plug-in;

Optionally, the at least one control system further comprises: the vehicle control unit, vehicle control unit corresponds a plurality of high-voltage connector include: the system comprises an AC plug-in of air conditioning equipment, an OBC plug-in of a vehicle-mounted charger, a cover opening switch plug-in of a high-voltage distribution box, a PTC plug-in of the high-voltage distribution box and a DC-DC plug-in of the high-voltage distribution box;

Optionally, the communication interface of the battery management system is further connected with the communication interface of the vehicle control unit through a CAN bus in a communication manner.

Optionally, in the plurality of high voltage connectors, the corresponding resistance values decrease sequentially from the first high voltage connector to the last high voltage connector, or increase sequentially.

In a second aspect, another embodiment of the present application provides a high-voltage interlock detection method, which is applied to a control unit in the high-voltage interlock detection circuit described in any one of the above first aspects, and the detection method includes:

detecting input voltage at two ends of the detection resistor;

Optionally, when the plurality of high voltage connectors are arranged from the first high voltage connector to the last high voltage connector, the corresponding resistance values are sequentially decreased;

comparing the input voltage with preset voltages corresponding to the plurality of high-voltage connectors;

Optionally, when the plurality of high-voltage connectors are arranged from the first high-voltage connector to the last high-voltage connector, the corresponding resistance values are sequentially increased;

comparing the input voltage with preset voltages corresponding to the plurality of high-voltage connectors;

Optionally, the method further comprises:

In a third aspect, another embodiment of the present application provides a control unit in the high-voltage interlock detection circuit according to any one of the second aspects, where the control unit includes: the voltage detection module is used for detecting input voltages at two ends of the detection circuit;

By adopting the high-voltage interlocking detection circuit provided by the application, because a plurality of high-voltage connectors are connected according to the preset connection relation to form a high-voltage interlocking loop, and resistors with different resistance values are connected between the high-voltage connectors in parallel, the setting mode can determine the disconnection position of the high-voltage connectors by calculating the detection voltage of the high-voltage interlocking input port according to a resistor parallel connection formula, because the resistance values of the resistors connected in parallel with the high-voltage connectors are different, the states of the different detection voltages corresponding to the different high-voltage connectors can be determined according to the detection voltage of the high-voltage interlocking input port, so as to judge whether the interlocking of the current high-voltage connectors is disconnected or not, the disconnection number of the high-voltage connectors and the disconnected high-voltage connectors in the plurality of high-voltage connectors can be judged, and the detection mode can directly judge the connection state of the current, and the disconnected high-voltage connector can be quickly determined, so that the automatic detection of the interlocking disconnection position is realized, and the troubleshooting efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a high-voltage interlock detection circuit according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a high-voltage interlock detection circuit according to another embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a high-voltage interlock detection circuit according to another embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a high-voltage interlock detection circuit according to another embodiment of the present disclosure;

fig. 5 is a schematic flow chart of a high-voltage interlock detection method according to an embodiment of the present disclosure;

FIG. 6 is a schematic flow chart of a high voltage interlock detection method according to another embodiment of the present application;

FIG. 7 is a schematic flow chart of a high voltage interlock detection method according to another embodiment of the present application;

fig. 8 is a schematic structural diagram of a control unit according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments.

The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

Additionally, the flowcharts used in this application illustrate operations implemented according to some embodiments of the present application. It should be understood that the operations of the flow diagrams may be performed out of order, and steps without logical context may be performed in reverse order or simultaneously. One skilled in the art, under the guidance of this application, may add one or more other operations to, or remove one or more operations from, the flowchart.

The following explains a high-voltage interlock detection circuit provided in an embodiment of the present application with reference to a plurality of specific application examples. Fig. 1 is a schematic structural diagram of a high-voltage interlock detection circuit according to an embodiment of the present application, and as shown in fig. 1, the high-voltage interlock detection circuit 100 includes: at least one control system 110, and a plurality of high voltage connectors 120 corresponding to each control system, wherein:

the high-voltage interlock output port 130 of each control system is electrically connected to the input interface of the first high-voltage connector of the plurality of high-voltage connectors 120, wherein in some possible embodiments, the high-voltage interlock output port 130 may output a 12V + voltage analog signal or a Pulse Width Modulation (PWN) signal, and the signal output by the specific high-voltage interlock output port 130 may be flexibly adjusted according to the user's needs, which is not limited to the above embodiments.

The output interface of the former high-voltage connector is connected with the input interface of the latter high-voltage connector in the plurality of high-voltage connectors 120, and the output interface of the last high-voltage connector in the plurality of high-voltage connectors 120 is also electrically connected with the high-voltage interlocking input port 140 of each control system to form a high-voltage interlocking loop from the high-voltage interlocking output port 130, the plurality of high-voltage connectors 120 to the high-voltage interlocking input port 140; two detection ends of the control unit 150 in each control system 110 are respectively electrically connected to two ends of the detection resistor 160 in each control system 110, the high-voltage interlock input port 140 is electrically connected to one end of the detection resistor 160, and the other end of the detection resistor 160 is grounded; a resistor with a corresponding resistance value of each high-voltage connector 120 is connected in parallel between the input interface and the output interface of each high-voltage connector 120; the resistance values for different high voltage connectors 120 are different.

Optionally, in an embodiment of the present application, the resistances of the resistors connected in parallel in the plurality of high voltage connectors 120 from the first high voltage connector to the last high voltage connector may be sequentially decreased or sequentially increased; for example, in an embodiment of the present application, the high-voltage interlock detection circuit 100 may include four high-voltage connectors 120, and the resistance values of the parallel-connected resistors of the high-voltage connectors 120 from the first high-voltage connector to the last high-voltage connector may be, for example, sequentially: 11R, 3R, R, and 1/3R, where the resistance value of R is typically thousands of ohms, for example, may be 1.5k Ω, it should be understood that the above embodiments are merely exemplary, and the specific resistance values of the parallel-connected resistors of the interfaces, and the corresponding relationship between the high-voltage connector 120 and the resistor may be flexibly adjusted according to the number of interfaces of the high-voltage connector 120 included in the current high-voltage interlock detection circuit 100 or the hardware configuration of the high-voltage interlock detection circuit 100, and are not limited to the above embodiments.

Optionally, on the basis of the above embodiments, embodiments of the present application may further provide a high-voltage interlock detection circuit, which is described below with reference to the accompanying drawings. Fig. 2 is a schematic structural diagram of a high-voltage interlock detection circuit according to another embodiment of the present disclosure, and as shown in fig. 2, in an embodiment of the present disclosure, at least one control system may include: a battery management system 111, the plurality of high voltage connectors corresponding to the battery management system comprising: a master positive master negative card 121, a fast charge card 122, a slow charge card 123, and a Manual Service Disconnect (MSD) card 124; the input interface of the main positive main negative plug-in 121 is electrically connected to the high-voltage interlock output 131 of the battery management system 111, the output interface of the main positive main negative plug-in 121 is electrically connected to the input interface of the fast charging plug-in 122, the output interface of the fast charging plug-in 122 is electrically connected to the input interface of the slow charging plug-in 123, the output interface of the slow charging plug-in 123 is electrically connected to the input interface of the MSD plug-in 124, and the input interface of the MSD plug-in 124 is electrically connected to the high-voltage interlock input 141 of the battery management system 111.

The quick charging plug-in unit 124 is used for a plug-in unit at a battery system end where a quick charging loop of the whole vehicle is connected with a battery system, the slow charging plug-in unit 125 is used for a plug-in unit at a battery system end where a slow charging loop of the whole vehicle is connected with the battery system, a user can select a corresponding charging plug-in unit according to the current charging requirement, the MSD plug-in unit is internally provided with a fuse which can perform circuit breaking protection on abnormal current, and the MSD plug-in unit can be manually disconnected during maintenance, so that the safety of a high-voltage electrical appliance and a device during maintenance work is guaranteed, and the voltage isolation function is achieved.

For example, in the above embodiment, it is still exemplified that the resistances of the resistors connected in parallel with each high-voltage connector are sequentially decreased, and the resistances connected in parallel with each high-voltage connector may be, for example: the main positive and negative plug-in 121 is connected with the resistor 11R in parallel, the quick charging plug-in 122 is connected with the resistor 3R in parallel, the slow charging plug-in 123 is connected with the resistor R in parallel, and the MSD plug-in 124 is connected with the resistor R in parallelA resistance, wherein R may be, for example, 2K Ω; at this time, the high-voltage interlock output port 131 is a BMS interlock output port, the high-voltage interlock input port 141 is a BMS interlock input port, the control Unit is a micro control Unit 151 (MCU) for detecting an input voltage, and the manner of determining whether the high-voltage interlock circuit is disconnected may be, for example: when the plug and socket of all high voltage connectors all connect well, the interlocking loop of the plug and socket at this moment is a good wire, the resistance value of the corresponding resistor is very small, the parallel formula of the resistor can be known, when each high voltage connector is connected well, the large resistance value of the socket interlocking input and output in parallel can be ignored, the BMS interlocking output port outputs 12V + voltage signals, and the BMS interlocking output port is conducted to the BMS interlocking input port by the wire, and the MCU detects that the input voltage is 12V +.

When the high-voltage connector is in one positionWhen the interlock is broken, for example: when the main positive main negative plug-in 121 is disconnected in an interlocking manner, the 11R resistor connected in parallel with the main positive main negative plug-in 121 is connected in series into a high-voltage interlocking input and output loop, and the detection voltage of the high-voltage interlocking input port 141 can be known through calculation at the momentSimilarly, when the quick charge card 122 is disconnected, the detection voltage U of the high-voltage interlock input port 141 becomes 3V, when the slow charge card 123 is disconnected, the detection voltage U of the high-voltage interlock input port 141 becomes 6V, and when the MSD card 124 is disconnected, the detection voltage U of the high-voltage interlock input port 141 becomes 9V.

When the high voltage connector interlock in a certain two positions is disconnected, for example: when the main positive main negative card 121 is disconnected from any other card, the voltage detected by the high voltage interlock input port 141 is detected(where XR is the resistance of any interlock breaking high voltage connector insert in parallel outside the main positive and negative insert 121). The detected voltage at the high voltage interlock input 141 when the quick fill plug 122 and the slow fill plug 123 are disconnectedThe detected voltage at the high voltage interlock input port 141 when the quick charge card 122 and the MSD card 124 are disconnectedThe detected voltage at the high voltage interlock input port 141 when the trickle charge insert 123 and the MSD insert 124 are disconnected

From the above, it can be seen that: when the voltage detected by the MCU is 1V, 3V, 6V, 9V or 12V, the high-voltage connector corresponding to the current disconnection is a main positive main negative plug, a fast charging plug, a slow charging plug or an MSD plug. The condition that two, three or four high-voltage connector plug-ins are disconnected simultaneously can be deduced by a resistor series connection voltage division formula. When U is less than 1V, the main positive main negative plug-in unit in the current high-voltage interlocking detection circuit must be disconnected. When U is more than 1V and less than 3V, the quick charging connector in the current high-voltage interlocking detection circuit must be disconnected. When U is more than 3V and less than 6V, the slow charging plug-in unit in the current high-voltage interlocking detection circuit must be disconnected. When U < 6V < 9V, the MSD plug-in the current high-voltage interlock detection circuit must be disconnected.

It should be understood that the above embodiments are only exemplary, and the correspondence between the detected voltage and the determined disconnection of the high-voltage connectors is determined according to the parallel-connected resistance of each high-voltage connector and the value of the input voltage, and is not limited to the correspondence given in the above embodiments.

Optionally, on the basis of the above embodiments, embodiments of the present application may further provide a high-voltage interlock detection circuit, which is described below with reference to the accompanying drawings. Fig. 3 is a schematic structural diagram of a high-voltage interlock detection circuit according to another embodiment of the present application, and as shown in fig. 3, in an embodiment of the present application, at least one control system further includes: vehicle control unit 112, a plurality of high-voltage connectors that vehicle control unit corresponds include: an Alternating Current (AC) plug 125 of an air conditioning device, an OBC plug 126 of a vehicle-mounted charger, a cover opening switch plug 127 of a high-voltage distribution box, a PTC plug 128 of the high-voltage distribution box, and a DC-DC plug 129 of the high-voltage distribution box; the input interface of the AC plug-in 125 is electrically connected to the high-voltage interlock output port 132 of the vehicle controller, the output interface of the AC plug-in 125 is electrically connected to the input interface of the OBC plug-in 126, the output interface of the OBC plug-in 126 is electrically connected to the input interface of the cover opening switch plug-in 127, the output interface of the cover opening switch plug-in 127 is electrically connected to the input interface of the PTC plug-in 128, the input interface of the PTC plug-in 128 is electrically connected to the input interface of the DC-DC conversion plug-in 129, and the output interface of the DC-DC plug-in 129 is electrically connected to.

Illustratively, in one embodiment of the present application, the communication interface of the battery management system 111 is further communicatively connected to the communication interface of the vehicle control unit via a Controller Area Network (CAN) bus.

By adopting the high-voltage interlocking detection circuit provided by the application, as the plurality of high-voltage connectors are connected according to the preset connection relation to form the high-voltage interlocking loop, and the resistors with different resistance values are connected in parallel between the high-voltage connectors, the arrangement mode can determine whether the connection of each high-voltage connector is abnormal or not by calculating the detection voltage of the high-voltage interlocking input port according to the resistance parallel formula, if so, the disconnection position can be determined according to the detection voltage of each high-voltage interlocking input port, and as the resistance values of the resistors connected in parallel between the high-voltage connectors are different, the states of the different detection voltages corresponding to the different high-voltage connectors can be determined according to the detection voltage of the high-voltage interlocking input port, so as to judge whether the current high-voltage connector is disconnected or not, the disconnection number is determined, and the disconnected high-voltage connectors are determined in the plurality, the detection mode can judge the connection state of the current high-voltage connector directly according to the detection voltage, can quickly determine the disconnected high-voltage connector, and can still directly determine the position of the disconnected high-voltage connector even if more shunts exist in the current high-voltage interlocking circuit, so that the automatic detection of the interlocked disconnection position is realized, and the troubleshooting efficiency is improved.

Optionally, on the basis of the above embodiments, the embodiments of the present application may further provide a method for detecting a high-voltage interlock disconnection position, and an implementation process of the method is described as follows with reference to the accompanying drawings. Fig. 5 is a schematic flowchart of a method for detecting a high-voltage interlock open position according to another embodiment of the present application, where the method is applied to a control unit in the high-voltage interlock detection circuit shown in any one of fig. 1 to 4, and as shown in fig. 5, the method may include:

s201: the input voltage across the sense resistor is detected.

The high-voltage interlocking detection circuit comprises a high-voltage interlocking detection circuit, a detection resistor, a resistor and a resistor, wherein each high-voltage connector in the high-voltage interlocking detection circuit is connected with the corresponding resistor in parallel, the resistance values of the resistors corresponding to the high-voltage connectors are different, and the high-voltage connectors work normally.

S202: and when the input voltage is less than the output voltage of the high-voltage interlocking output port, determining that the target high-voltage connector with interlocking disconnection exists in the plurality of high-voltage connectors according to the input voltage and the preset voltages corresponding to the plurality of high-voltage connectors.

When the input voltage is equal to the output voltage, the connection state of each high-voltage connector of the current high-voltage interlocking detection circuit is good, and no fault exists; the preset voltage corresponding to each high-voltage connector is the voltage at two ends of the detection resistor when the interlocking disconnection exists in each high-voltage connector.

By adopting the detection method of the high-voltage interlocking disconnection position provided by the application, as the plurality of high-voltage connectors are connected according to the preset connection relation to form the high-voltage interlocking loop, and resistors with different resistance values are connected in parallel between the high-voltage connectors, whether the current high-voltage detection circuit has faults or not can be determined according to the magnitude relation between the input voltage of each detected resistance value and the output voltage of the high-voltage interlocking output port, if the input voltage of the detected resistance value is less than the output voltage of the high-voltage interlocking output port, the current high-voltage detection circuit has faults, at the moment, the detection voltage of the high-voltage interlocking input port is calculated through a resistor parallel formula, the position of the disconnected high-voltage connector is determined according to the detection voltage, and as the resistance values of the resistors connected in parallel with the high-voltage connectors are different, the states of the different detection voltages corresponding to the high-voltage connectors can, therefore, whether the interlock of the current high-voltage connector is disconnected or not and the number of the disconnected high-voltage connectors are judged, and the disconnected high-voltage connectors are determined in the plurality of high-voltage connectors, so that the connection state of the current high-voltage connectors can be judged directly according to the detection voltage, and the disconnected high-voltage connectors can be determined quickly, so that the interlock disconnection position can be automatically detected, and the failure removal efficiency is improved.

Optionally, on the basis of the above embodiments, the embodiments of the present application may further provide a method for detecting a high-voltage interlock disconnection position, and an implementation process of the method is described as follows with reference to the accompanying drawings. Fig. 6 is a schematic flow chart of a method for detecting a high-voltage interlock open position according to another embodiment of the present application, which is described in the following embodiments of the present application by taking an example that when a plurality of high-voltage connectors are sequentially decreased from a first high-voltage connector to a last high-voltage connector, corresponding resistance values are sequentially decreased; as shown in fig. 6, S202 may include:

s203: and comparing the input voltage with preset voltages corresponding to the plurality of high-voltage connectors.

Comparing the input voltage of each detection resistor with preset voltages corresponding to the plurality of high-voltage connectors, and determining that the target high-voltage connector is a disconnected high-voltage connector according to the comparison result; the specific judgment method is as follows:

s204: and when the input voltage is less than the preset voltage corresponding to the first high-voltage connector, determining that the first high-voltage connector is the target high-voltage connector.

Or:

s205: and when the input voltage is greater than the preset voltage corresponding to the previous high-voltage connector and less than the preset voltage corresponding to the next high-voltage connector, determining the next high-voltage connector as the target high-voltage connector.

It should be understood that the above embodiments are only exemplary, and the corresponding resistance values of the plurality of high voltage connectors may also be: in the plurality of high-voltage connectors, the corresponding resistance values sequentially decrease from the first high-voltage connector to the last high-voltage connector; in this case, S202 may include: comparing the input voltage with preset voltages corresponding to the plurality of high-voltage connectors; when the input voltage is less than the preset voltage corresponding to the last high-voltage connector, determining that the last high-voltage connector is a target high-voltage connector; or when the input voltage is greater than the preset voltage corresponding to the next high-voltage connector and less than the preset voltage corresponding to the previous high-voltage connector, determining that the previous high-voltage connector is the target high-voltage connector. The resistance values corresponding to the high-voltage connectors can be flexibly adjusted according to the user's needs, and are not limited to those given in the above embodiments.

s206: and when the input voltage is equal to the output voltage of the high-voltage interlocking output port, determining that no interlocking disconnected high-voltage connector exists in the plurality of high-voltage connectors.

The detection method for the high-voltage interlock disconnection position provided by the application is applied to the control unit in any one of the high-voltage interlock detection circuits shown in fig. 1 to 3, so that the beneficial effects brought by the detection method are the same as those brought by any one of the high-voltage interlock detection circuits shown in fig. 1 to 3, and the description of the detection method is omitted here.

The following explains a control unit provided in the present application with reference to the drawings, where the control unit is a control unit in the high-voltage interlock detection circuit described in any one of fig. 1 to 4, and the control unit can execute the detection method of the high-voltage interlock disconnection position described in any one of fig. 5 to 7, and specific implementation and beneficial effects thereof are referred to above and will not be described again below.

Fig. 8 is a schematic structural diagram of a control unit according to an embodiment of the present application, and as shown in fig. 8, the control unit may include: a voltage detection module 301 and an interlock open detection module 302, wherein:

the voltage detection module 301 is configured to detect an input voltage across the detection circuit.

The interlock disconnection detecting module 302 is configured to determine, when the input voltage is smaller than the output voltage of the high-voltage interlock output port, a target high-voltage connector with interlock disconnection in the plurality of high-voltage connectors according to the input voltage and preset voltages corresponding to the plurality of high-voltage connectors, where the preset voltage corresponding to each high-voltage connector is a voltage at two ends of the detection resistor when the interlock disconnection exists in each high-voltage connector.

The control unit is configured to execute the method provided by the foregoing embodiment, and the implementation principle and the technical effect are similar, which are not described herein again.

These above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when one of the above modules is implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

In the several embodiments provided in the present application, it should be understood that the disclosed circuits and methods may be implemented in other ways. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to perform some steps of the methods according to the embodiments of the present application. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

16页详细技术资料下载

High-voltage interlocking detection circuit, detection method of disconnection position and control unit

相关技术

网友询问留言