CN216411537U - High-voltage interlocking detection circuit - Google Patents
High-voltage interlocking detection circuit Download PDFInfo
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- CN216411537U CN216411537U CN202122594420.5U CN202122594420U CN216411537U CN 216411537 U CN216411537 U CN 216411537U CN 202122594420 U CN202122594420 U CN 202122594420U CN 216411537 U CN216411537 U CN 216411537U
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Abstract
The utility model discloses a high-voltage interlocking detection circuit which comprises a high-voltage interlocking detection circuit used for being connected with a high-voltage electrical appliance in series, wherein one end of the high-voltage interlocking detection circuit is provided with a constant current module used for providing a current signal, the detection circuit also comprises a first detection module and a control module, the first detection module is used for detecting the current signal output by the constant current module, the output end of the first detection module is connected with the control module, the control module is used for judging whether the constant current module is normal or not according to the current signal detected by the first detection module, and the control module sends a reminding signal through a vehicle-mounted reminding system. The utility model has the advantages that: the interlocking detection device has the advantages that the detection is simple, the high-voltage interlocking detection can be matched with each other, the accuracy of the interlocking detection is improved, the constant-current module fault and/or the current-limiting module fault in the interlocking loop can be detected, and the fault state of the constant-current module and the current-limiting module can be timely eliminated after the interlocking fault alarm.
Description
Technical Field
The utility model relates to the field of automobile electrical safety, in particular to a high-voltage interlocking detection circuit.
Background
A High Voltage Interlock Loop (High Voltage Interlock Loop) function is an important protection function of the BMS, and is used to detect a connection state of a High Voltage connector in a High Voltage circuit in an electric vehicle and identify whether the High Voltage connector is normally connected. If the connection circuit is not complete, the system cannot be powered on. When all the detection is normal, the work is allowed, thereby ensuring the safety of people and vehicles. The existence of the HVI L ensures the integrity of the whole system before the high-voltage bus is powered on, and ensures the safety of the system. The HVI L is primarily accomplished through the connector, and the primary precaution is the connection of the wiring harness and the connector to determine if the entire high voltage interlock chain is complete. In the prior art, a high-voltage interlocking detection circuit is usually adopted to connect all interlocking appliances in series, then a constant current source output current arranged at one end sequentially flows through all the interlocking appliances connected in series through the high-voltage interlocking detection circuit, and finally a control module detects whether a current acquisition value is normal after the current acquisition value passes through the high-voltage interlocking detection circuit so as to judge whether interlocking has a fault or not.
SUMMERY OF THE UTILITY MODEL
The aim of information is to overcome the defects of the prior art and provide a high-voltage interlocking detection circuit, wherein a circuit for detecting a current source is added on the basis of an interlocking detection loop of the prior art, so that the interlocking fault of a high-voltage electrical appliance or the current signal fault for interlocking detection can be quickly confirmed according to detection alarm data.
In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a high-voltage interlocking detection circuit, detection circuit is including the high-voltage interlocking detection circuitry who is used for concatenating high-voltage apparatus, high-voltage interlocking detection circuitry one end is provided with the constant current module that is used for providing current signal, detection circuit still includes first detection module, control module, first detection module is used for detecting the current signal of constant current module output, and its output connection control module, control module is used for judging whether constant current module is normal according to the current signal that first detection module detected, control module sends the warning signal through on-vehicle warning system.
The control module comprises a Central Processing Unit (CPU), a Random Access Memory (RAM), a read-only memory (ROM), an input/output (I/O) port and an interrupt system, wherein the RAM, the ROM, the I/O port and the interrupt system are respectively connected with the CPU, and the CPU is connected with the first detection module through the I/O port.
The first detection module adopts a current acquisition and sampling circuit to acquire an output current signal of the constant current module.
The detection circuit further comprises a current limiting module and a second detection module, wherein the current limiting module is used for limiting current in the high-voltage interlocking detection circuit, the second detection module is used for detecting the working state of the current limiting module, and the output end of the second detection module is connected with the control module.
The control module is integrated in the PMS or the BMS.
The vehicle-mounted reminding system is a vehicle-mounted instrument or a central control screen.
The utility model has the advantages that: the interlocking detection device has the advantages that the detection is simple, the high-voltage interlocking detection can be matched with each other, the accuracy of the interlocking detection is improved, the constant-current module fault and/or the current-limiting module fault in the interlocking loop can be detected, and the fault state of the constant-current module and the current-limiting module can be timely eliminated after the interlocking fault alarm.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
fig. 1 is a schematic diagram of the circuit structure of the present invention.
Detailed Description
The following description of preferred embodiments of the utility model will be made in further detail with reference to the accompanying drawings.
As shown in fig. 1, in the prior art, a high voltage interconnection detection line detects the interconnection state between high voltage modules through a circuit loop (low voltage line), generally, each high voltage device to be interlocked is connected in series through a low voltage line, then, a constant current signal is output through a constant current module at one end, and then, a current signal is output through each high voltage device in sequence through a high voltage interlocking detection line, a signal is detected at the output end of a BMS, if a signal is output and the high voltage devices are in a normal state, the interlocking between the high voltage devices connected in series through the high voltage interlocking detection line is normal, otherwise, an interlocking fault is judged, and at this time, a control module for detection can cut off power supply and alarm according to the interlocking requirement. Meanwhile, the current limiting module is arranged in the low-voltage line and used for limiting the current, if the current is too large, the system safety is affected, but in the prior art, the detection mode ignores the risk of interlocking fault detection errors caused by the abnormality of constant current signals output by the constant current module and the risk of error detection caused by the fault of the current limiting module, so that the detection of the two modules needs to be increased, and a more accurate detection result is realized for the detection of the interlocking fault.
As shown in fig. 1, a high-voltage interlock detection circuit includes a high-voltage interlock detection circuit for connecting high-voltage electrical appliances in series, one end of the high-voltage interlock detection circuit is provided with a constant current module for providing a current signal, then the high-voltage interlock detection circuit is connected with each high-voltage device to be interlocked in series in sequence, and then the output end of the last interlocked high-voltage device detects a voltage or current signal through a controller for high-voltage interlock detection such as a BMS to determine whether an interlock fault exists, so that the interlock fault can not be detected at the output end, and thus the fault can be determined. However, in the interlocking fault, there is a possibility that a signal detected by an output end due to abnormal output of the constant current module is also abnormal, so that in order to confirm whether the interlocking fault or the constant current module is the fault, a first detection module and a control module are provided, the first detection module is used for detecting a current signal output by the constant current module, the output end of the first detection module is connected with the control module, the control module is used for judging whether the constant current module is normal or not according to the current signal detected by the first detection module, and the control module sends a reminding signal through a vehicle-mounted reminding system. Because of the current signal that constant current module output set up, can also cause subsequent BMS to detect abnormal signal and report to the police according to the output of current signal does not have or unusual. Therefore, the control module detects the output signal of the constant current module through the first detection module.
The voltage value on the collection resistor of the output end of the collection constant current module is used for judging whether the current output of the constant current module is normal or not, namely the first detection module adopts the collection resistor and an AD sampling circuit to realize detection, the collection resistor is arranged at the output end of the constant current module, and then the voltage is divided by the resistor, and then the voltage is converted into a digital signal through AD, and then the digital signal is adopted by the control module to judge whether the constant current module is normal or not according to the collection signal.
The control module comprises a Central Processing Unit (CPU), a Random Access Memory (RAM), a read-only memory (ROM), an input/output (I/O) port and an interrupt system, wherein the RAM, the ROM, the I/O port and the interrupt system are respectively connected with the CPU, and the CPU is connected with the first detection module through the I/O port. The control module is integrated in the PMS or the BMS or directly realized by the BMS, so that the control module is consistent with the interlocking alarm detection. After the interlocking alarm, whether the constant current module is normal or not can be determined, if the constant current module has no fault, the constant current module can be removed, and then maintenance personnel can check the interlocking loop fault. The vehicle-mounted reminding system for reminding is a vehicle-mounted instrument or a central control screen, and the abnormity of the constant current module is reminded in an alarming mode.
In a preferred embodiment, the detection circuit further comprises a current limiting module and a second detection module, wherein the current limiting module is used for limiting the current in the high-voltage interlock detection line, the second detection module is used for detecting the working state of the current limiting module, and the output end of the second detection module is connected with the control module. The second detection module is used for detecting whether the current limiting module works normally or not so as to check whether the current limiting module is abnormal or not.
In a first aspect of the present invention, a high voltage interlock detection circuit includes: the high-voltage interlocking detection circuit comprises a constant current module, a high-voltage interlocking detection circuit, a current limiting module and a first control module, wherein the first control module is used for detecting whether the acquisition value of an output signal of the constant current module after passing through the high-voltage interlocking detection circuit is in a normal range or not, the current limiting module is used for limiting the current in the high-voltage interlocking detection circuit, and the high-voltage interlocking detection circuit further comprises: the device comprises a first detection module and a second detection module;
the first detection module is arranged at the output end of the constant current module and used for detecting whether the output signal of the constant current module is normal or not;
the second detection module is connected with the current limiting module and used for detecting whether the current limiting module works normally or not.
The existing high-voltage interconnection detection module detects the interconnection state between the high-voltage modules through a circuit loop. The embodiment of the utility model adds a detection circuit to judge whether the current output of the constant current module is normal or not by collecting the voltage value on the collecting resistor at the output end of the constant current module, and detects whether the current limiting module has short circuit or open circuit or not by another detection circuit. When the first control module detects a high-voltage interlocking fault, the first control module can check which module of the constant current module, the high-voltage interlocking detection circuit and the current limiting module has a problem, so that the fault of the constant current module or the current limiting module can be better eliminated, and the fault of the high-voltage interlocking detection circuit can be prevented from being mistakenly reported.
Whether the current limiting module has short circuit or open circuit is detected through the detection circuit. When the first control module detects a high-voltage interlocking fault, the first control module can check which module of the constant current module, the high-voltage interlocking detection circuit and the current limiting module has a problem, so that the fault of the constant current module or the current limiting module can be better eliminated, and the fault of the high-voltage interlocking detection circuit can be prevented from being mistakenly reported.
The first detection module, the second detection module and the third control module are integrated in the same hardware module. The hardware module has the functions of numerical calculation and logical operation, and at least comprises a central processing unit CPU with data processing capability, a random access memory RAM, a read-only memory ROM, various I/O ports, an interrupt system and the like. Here, the control module or the control device may be general hardware such as a single chip microcomputer, a chip, or a processor, and here, the device may be an existing controller in a PMS (battery pack management system) or a BMS (battery management system), which implements a function that is a sub-function of the controller.
It is clear that the specific implementation of the utility model is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the utility model.
Claims (6)
1. The utility model provides a high-voltage interlocking detection circuitry, detection circuitry is including the high-voltage interlocking detection circuitry who is used for concatenating high-voltage apparatus, high-voltage interlocking detection circuitry one end is provided with the constant current module that is used for providing current signal, its characterized in that: the detection circuit further comprises a first detection module and a control module, the first detection module is used for detecting a current signal output by the constant current module, the output end of the first detection module is connected with the control module, the control module is used for judging whether the constant current module is normal or not according to the current signal detected by the first detection module, and the control module sends a reminding signal through the vehicle-mounted reminding system.
2. A high voltage interlock detection circuit as claimed in claim 1, wherein: the control module comprises a Central Processing Unit (CPU), a Random Access Memory (RAM), a read-only memory (ROM), an input/output (I/O) port and an interrupt system, wherein the RAM, the ROM, the I/O port and the interrupt system are respectively connected with the CPU, and the CPU is connected with the first detection module through the I/O port.
3. A high voltage interlock detection circuit as claimed in claim 1, wherein: the first detection module adopts a current acquisition and sampling circuit to acquire an output current signal of the constant current module.
4. A high voltage interlock detection circuit as claimed in claim 1, wherein: the detection circuit further comprises a current limiting module and a second detection module, wherein the current limiting module is used for limiting current in the high-voltage interlocking detection circuit, the second detection module is used for detecting the working state of the current limiting module, and the output end of the second detection module is connected with the control module.
5. A high voltage interlock detection circuit as claimed in any one of claims 1 to 4, wherein: the control module is integrated in the PMS or the BMS.
6. A high voltage interlock detection circuit as claimed in any one of claims 1 to 4, wherein: the vehicle-mounted reminding system is a vehicle-mounted instrument or a central control screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122594420.5U CN216411537U (en) | 2021-10-27 | 2021-10-27 | High-voltage interlocking detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122594420.5U CN216411537U (en) | 2021-10-27 | 2021-10-27 | High-voltage interlocking detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216411537U true CN216411537U (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122594420.5U Active CN216411537U (en) | 2021-10-27 | 2021-10-27 | High-voltage interlocking detection circuit |
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|---|---|
| CN (1) | CN216411537U (en) |
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2021
- 2021-10-27 CN CN202122594420.5U patent/CN216411537U/en active Active
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Effective date of registration: 20230524 Address after: Floor 18, Building 13, Science and Technology Industrial Park, No. 717 Zhongshan South Road, Wuhu High tech Industrial Development Zone, Yijiang District, Wuhu City, Anhui Province, 241000 Patentee after: Wuhu Tairui Automobile Co.,Ltd. Address before: 241000 Building 8, science and Technology Industrial Park, 717 Zhongshan South Road, Yijiang District, Wuhu City, Anhui Province Patentee before: Chery Commercial Vehicles (Anhui) Co., Ltd. |