CN218938444U - Battery voltage acquisition circuit, fuel cell voltage inspection instrument and vehicle - Google Patents
Battery voltage acquisition circuit, fuel cell voltage inspection instrument and vehicle Download PDFInfo
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- CN218938444U CN218938444U CN202220785690.6U CN202220785690U CN218938444U CN 218938444 U CN218938444 U CN 218938444U CN 202220785690 U CN202220785690 U CN 202220785690U CN 218938444 U CN218938444 U CN 218938444U
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The application relates to a battery voltage acquisition circuit, fuel cell voltage inspection appearance and vehicle, battery voltage acquisition circuit includes: the first to N-th voltage acquisition assemblies are sequentially connected and acquire the stack voltage of the fuel cell, wherein each voltage acquisition assembly is provided with a plurality of acquisition channels; the first isolation assembly is connected with the first voltage acquisition assembly, and the second isolation assembly is connected with the Nth voltage acquisition assembly and is used for isolating interference signals except voltage signals; the control assembly is respectively connected with the first isolation assembly and the second isolation assembly and is used for identifying the actual polarity of the current pile voltage while controlling the first to N-th voltage acquisition assemblies to acquire the current pile voltage of the fuel cell according to the voltage acquisition command. Therefore, the problems that the battery voltage acquisition chip in the related technology is high in cost, few in sampling channels, incapable of supporting negative voltage acquisition and the like are solved, the normal working efficiency and the data acquisition period of the fuel cell stack are improved, and the cost is reduced.
Description
Technical Field
The application relates to the technical field of electronic equipment, in particular to a battery voltage acquisition circuit, a fuel cell voltage inspection instrument and a vehicle.
Background
In the related art, since there are very few special acquisition chips for fuel cells in the market, most companies use the special acquisition chips for lithium cells to design products of CVM (Cell Voltage Monitor, fuel cell voltage inspection instrument).
However, although the lithium battery voltage acquisition chip can meet part of the requirements of fuel cell voltage acquisition, the lithium battery voltage acquisition chip has the characteristics of high cost, few sampling channels, incapability of supporting negative voltage acquisition and the like, is not suitable for the application scene of the fuel cell, and needs to be solved urgently.
Disclosure of Invention
In view of this, this application aims at providing a battery voltage acquisition circuit, fuel cell voltage inspection appearance and vehicle, has solved battery voltage acquisition chip among the relevant technique with high costs, sampling channel is few and can not support problems such as negative voltage collection, has improved fuel cell stack's normal work efficiency, data acquisition cycle, and the cost is reduced.
In order to achieve the above purpose, the technical scheme of the application is realized as follows:
a battery voltage acquisition circuit comprising:
the first to N-th voltage acquisition assemblies are sequentially connected and acquire the stack voltage of the fuel cell, wherein each voltage acquisition assembly is provided with a plurality of acquisition channels;
the first isolation component is connected with the first voltage acquisition component, and the second isolation component is connected with the Nth voltage acquisition component and is used for isolating interference signals except voltage signals; and
the control assembly is respectively connected with the first isolation assembly and the second isolation assembly and is used for identifying the actual polarity of the current pile voltage of the fuel cell while controlling the first to N-th voltage acquisition assemblies to acquire the current pile voltage of the fuel cell according to the voltage acquisition instruction.
Further, among the first to nth voltage acquisition components, each voltage acquisition component includes:
the first to M-th voltage acquisition channels are used for acquiring the stack voltages of the first to M-th channels of the fuel cell;
the isolation unit is connected with the first path voltage acquisition channel, the second path voltage acquisition channel and the third path voltage acquisition channel and is used for isolating the interference signals except the voltage signals.
Further, the control assembly further comprises:
and the updating unit is used for detecting the updating program in real time and carrying out online real-time upgrading when the updating program is detected.
Further, the control assembly further comprises:
the broken wire detection unit is used for periodically sending a power-off detection instruction to the first to N-th voltage acquisition components and controlling the first to N-th voltage acquisition components to start broken wire detection.
Further, the battery voltage acquisition circuit further includes:
and the reset component is connected with the control component and is used for resetting the control component when the control component meets the reset condition.
Further, the battery voltage acquisition circuit further includes:
the power supply interface is used for supplying power to the battery voltage acquisition circuit after being connected with the direct-current power supply.
Further, the battery voltage acquisition circuit further includes:
the first communication interface is arranged on the control assembly, is connected with the engine controller of the fuel cell and is used for sending the stack voltage information and the diagnosis information to the engine controller of the fuel cell;
the second communication interface is arranged on the control component and connected with a preset terminal, and is used for performing GUI (Graphical User Interface ) monitoring and bootload upgrading on the battery voltage acquisition circuit.
Further, the battery voltage acquisition circuit, wherein,
the control assembly is communicated with the first to N voltage acquisition assemblies through a daisy chain.
Compared with the prior art, the battery voltage acquisition circuit has the following advantages:
the battery voltage acquisition circuit can identify the actual polarity of the current pile voltage when the first to N-th voltage acquisition assemblies with multiple paths of acquisition channels connected in sequence are controlled to acquire the current pile voltage of the fuel battery according to the voltage acquisition instruction. Therefore, the problems that the battery voltage acquisition chip in the related technology is high in cost, few in sampling channels, incapable of supporting negative voltage acquisition and the like are solved, the normal working efficiency and the data acquisition period of the fuel cell stack are improved, and the cost is reduced.
Another object of the present application is to provide a fuel cell voltage inspection apparatus, which solves the problems of high cost of a cell voltage acquisition chip, few sampling channels, and incapability of supporting negative voltage acquisition in the related art, improves the normal working efficiency and the data acquisition period of a fuel cell stack, and reduces the cost.
In order to achieve the above purpose, the technical scheme of the application is realized as follows:
a fuel cell voltage inspection instrument is provided with the cell voltage acquisition circuit.
The fuel cell voltage inspection instrument and the battery voltage acquisition circuit have the same advantages compared with the prior art, and are not described in detail herein.
Another object of the present application is to provide a vehicle, which solves the problems of high cost of a battery voltage acquisition chip, few sampling channels, and incapability of supporting negative voltage acquisition in the related art, improves the normal working efficiency and the data acquisition period of a fuel cell stack, and reduces the cost.
In order to achieve the above purpose, the technical scheme of the application is realized as follows:
a vehicle provided with the fuel cell voltage inspection apparatus as described above.
The vehicle and the fuel cell voltage inspection instrument have the same advantages compared with the prior art, and are not described in detail herein.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
fig. 1 is a block schematic diagram of a battery voltage acquisition circuit according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a battery voltage acquisition circuit according to one embodiment of the present application;
FIG. 3 is a negative voltage detection flow chart of a battery voltage acquisition circuit according to one embodiment of the present application;
fig. 4 is a flow chart of a broken wire test of the battery voltage acquisition circuit according to one embodiment of the present application.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 1 is a block schematic diagram of a battery voltage acquisition circuit according to an embodiment of the present application.
As shown in fig. 1, a battery voltage acquisition circuit 10 according to an embodiment of the present application includes: first through nth voltage acquisition assemblies 100, a first isolation assembly 200, a second isolation assembly 300, and a control assembly 400.
The first to nth voltage acquisition assemblies 100 (e.g., the first voltage acquisition assembly 101 to the nth acquisition module 10N) are sequentially connected to acquire stack voltages of the fuel cell, wherein each voltage acquisition assembly has multiple acquisition channels; the first isolation assembly 200 is connected with the first voltage acquisition assembly 101, and the second isolation assembly 300 is connected with the nth voltage acquisition assembly 10N, and is used for isolating interference signals except voltage signals; the control assembly 400 is connected to the first and second isolation assemblies 200 and 300, respectively, for identifying the actual polarity of the current stack voltage of the fuel cell while controlling the first to nth voltage acquisition assemblies 100 to acquire the current stack voltage according to the voltage acquisition command. It should be noted that, in order to meet the capability of the use requirements of passenger cars and commercial vehicles at the same time, the application embodiment adopts a wide-range voltage input power supply chip to enable the power supply chip to be compatible with 12v and 24v direct current power supply systems, therefore, according to the use requirements of professional fuel cell voltages, the application embodiment can be used for detecting through setting N voltage acquisition components, wherein the value of N needs to be greater than or equal to 1, preferably, in order to ensure the compatibility of the use requirements of passengers, the application embodiment can be used for detecting by using 6 voltage acquisition components, and the specific detection flow is described in detail in the following specific embodiments.
In some embodiments, as shown in fig. 2, among the first to nth voltage acquisition assemblies 100, each of the voltage acquisition assemblies includes: the first to Mth voltage acquisition channels and the isolation unit. The first to M-th voltage acquisition channels are used for acquiring the stack voltages of the first to M-th channels of the fuel cell; the isolation unit is connected with the first path voltage acquisition channel to the M path voltage acquisition channel and is used for isolating interference signals except voltage signals. The voltage collecting channels in the embodiment of the application can adopt multi-channel voltage collection, such as 4 channels, 16 channels, 36 channels and the like, and preferably, the embodiment of the application can adopt 36 channels of voltage collecting channels, namely, each voltage collecting component is provided with a battery voltage collecting chip for detecting 36 channels of pile voltage.
The control assembly 400 may be a micro control unit (Microcontroller Unit, MCU), also referred to as a single chip microcomputer, and the voltage acquisition command may be a command sent by a user through the control assembly 400.
For example, in the first to nth voltage acquisition modules 100 according to the embodiment of the present application, as shown in fig. 2, assuming that the 1 st to 6 th voltage acquisition modules exist in the embodiment of the present application, the first voltage acquisition module 101 may include the 1 st to 36 th voltage acquisition channels and their corresponding isolation units, the second voltage acquisition module 102 may include the 37 th to 72 th voltage acquisition channels and their corresponding isolation units, the third voltage acquisition module 103 may include the 73 th to 108 th voltage acquisition channels and their corresponding isolation units, the fourth voltage acquisition module 104 may include the 109 th to 144 th voltage acquisition channels and their corresponding isolation units, the fifth voltage acquisition module 105 may include the 145 th to 180 th voltage acquisition channels and their corresponding isolation units, and the sixth voltage acquisition module 106 may include the 181 th to 216 th voltage acquisition channels and their corresponding isolation units; thus, the 1 st to 36 th channel pile voltages can be acquired through the first voltage acquisition component, the 37 th to 72 th channel pile voltages can be acquired through the second voltage acquisition component, the 73 rd to 108 th channel pile voltages can be acquired through the third voltage acquisition component, the 109 th to 144 th channel pile voltages can be acquired through the fourth voltage acquisition component, the 145 th to 180 th channel pile voltages can be acquired through the fifth voltage acquisition component, and the 181 th to 216 th channel pile voltages can be acquired through the sixth voltage acquisition component. The first isolation component 200 and the second isolation component 300 may be transformer isolation components, and the control component 400 and the first to nth voltage acquisition components 100 are in daisy-chain communication through SPI (Serial Peripheral Interface ) and enhance the anti-interference capability of the device through transformer isolation, so as to improve the stability of communication data. The control component 400 can identify the actual polarity of the current stack voltage while the first to nth voltage acquisition components 100 acquire the current stack voltage of the fuel cell, that is, the battery voltage acquisition circuit 10 in the embodiment of the application supports positive and negative voltage acquisition, so as to realize-5V voltage acquisition, play a key role in normal operation of the battery stack and preventing abnormality occurrence, and meet special requirements of battery application scenes.
As shown in fig. 3, fig. 3 is a flowchart of negative voltage detection according to an embodiment of the present application, including the following steps:
s301, sending an acquisition instruction.
S302, detecting whether the voltage acquisition component is detected to be finished, if yes, executing S303, otherwise, continuing to execute the step.
S303, the singlechip reads the detection result.
S304, judging whether the voltage acquisition channel voltage is smaller than 0, if yes, executing S306, otherwise, executing S305.
S305, setting the state of the voltage acquisition channel to be normal.
S306, setting a voltage acquisition channel state fault.
S307, an alarm message is sent through the CAN (Controller Area Network ) bus.
Therefore, the special requirements of the application scene of the fuel cell are met by detecting the negative voltage of the pile voltage signal.
Further, in some embodiments, the control assembly 400 further comprises: and the updating unit is used for detecting the updating program in real time and carrying out online real-time upgrading when the updating program is detected.
That is, the control component 400 of the embodiment of the present application may detect the update program in real time after completing bootloader writing, and implement the online real-time upgrade program.
Further, in some embodiments, the control assembly 400 further comprises: the disconnection detection unit is configured to periodically send a power-off detection instruction to the first to nth voltage acquisition components 100, and control the first to nth voltage acquisition components 100 to start disconnection detection.
Specifically, the battery voltage acquisition component 100 has a disconnection detection function, the control component 400 can periodically send a power-off detection instruction to the first to nth voltage acquisition components 100 and control the first to nth voltage acquisition components 100 to perform disconnection detection, and after the first to nth voltage acquisition components 100 finish detection, the control component 400 reads the detection result again.
Specifically, as shown in fig. 4, when the control component 400 is a single-chip microcomputer, the disconnection detection process of the first to nth voltage acquisition components 100 includes the following steps:
s401, sending a disconnection detection instruction.
S402, detecting whether the voltage acquisition component is detected to be finished, if yes, executing S403, otherwise, continuing to execute the step.
S403, the singlechip reads the detection result.
S404, judging whether the voltage acquisition channel voltage is disconnected, if so, executing S406, otherwise, executing S405.
S405, setting the state of the voltage acquisition channel to be normal.
S406, setting a voltage acquisition channel state disconnection.
S407, sending a disconnection warning message through the CAN bus.
Therefore, by setting the disconnection detection function, the false alarm rate of the product is reduced, and the reliability and stability of the system are improved.
Further, in some embodiments, the battery voltage acquisition circuit 10 further comprises: and the reset component is connected with the control component 400 and is used for resetting the control component 400 when the control component 400 meets the reset condition.
Specifically, in the embodiment of the present application, the reset component may be a hardware watchdog circuit, and is connected to the reset pin of the control component 400, so as to perform a reset operation on the control component 400 when the program of the control component 400 is out of control, thereby further improving the reliability of the battery voltage acquisition circuit 10.
Further, in some embodiments, the battery voltage acquisition circuit 10 of the embodiments of the present application further includes: the power supply interface is used for supplying power to the battery voltage acquisition circuit after being connected with the direct-current power supply.
Specifically, the battery voltage acquisition circuit can select a power supply chip with a wide voltage input range, so that the battery voltage acquisition circuit is compatible with 12v and 24v direct current power supply systems, and the capability of meeting the use requirements of passenger vehicles and commercial vehicles is achieved. In addition, as shown in fig. 2, the embodiment of the present application may further be provided with an anti-overvoltage-undervoltage detection circuit and an EMI (Electro Magnetic Interference ) filter, so as to further improve the electromagnetic interference prevention performance and safety of the battery voltage acquisition circuit 10.
Further, in some embodiments, as shown in fig. 2, the battery voltage acquisition circuit 10 further includes: a first communication interface 401 provided on the control module 400 for transmitting stack voltage information and diagnostic information to an engine controller of the fuel cell; a second communication interface 402 provided on the control assembly 400 for GUI monitoring and bootload upgrading of the battery voltage acquisition circuit.
Specifically, the battery voltage acquisition circuit 10 adopts two paths of CAN interfaces (i.e., the first communication interface 401 and the second communication interface 402) and is responsible for external communication work and transmitting acquired stack voltage information and various diagnostic information. The first communication interface 401 and the second communication interface 402 provided on the control module 400 are denoted as CAN1 and CAN2, respectively. Wherein, the first communication interface 401 is connected with the engine controller of the fuel cell and is used for sending the stack voltage information and the diagnostic information to the engine controller of the fuel cell; the second communication interface 402 is connected to a preset terminal for performing GUI monitoring and bootload upgrading on the battery voltage acquisition circuit 10.
According to the battery voltage acquisition circuit provided by the embodiment of the application, the actual polarity of the current pile voltage of the fuel battery can be identified when the first to N-th voltage acquisition assemblies with the multipath acquisition channels, which are sequentially connected, are controlled according to the voltage acquisition command to acquire the current pile voltage of the fuel battery. Therefore, the problems that the battery voltage acquisition chip in the related technology is high in cost, few in sampling channels, incapable of supporting negative voltage acquisition and the like are solved, the normal working efficiency and the data acquisition period of the fuel cell stack are improved, and the cost is reduced.
Further, embodiments of the present application disclose a fuel cell voltage patrol instrument having a cell voltage acquisition circuit as in the above embodiments. The fuel cell voltage inspection instrument solves the problems that a cell voltage acquisition chip in the related technology is high in cost, few in sampling channels, incapable of supporting negative voltage acquisition and the like due to the cell voltage acquisition circuit, improves the normal working efficiency and the data acquisition period of a fuel cell stack, and reduces the cost.
Further, an embodiment of the present application discloses a vehicle provided with the fuel cell voltage patrol instrument of the above embodiment. The vehicle solves the problems of high cost of the battery voltage acquisition chip, few sampling channels, incapability of supporting negative voltage acquisition and the like in the related technology due to the fuel cell voltage inspection instrument, improves the normal working efficiency and the data acquisition period of the fuel cell stack, and reduces the cost.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. A battery voltage acquisition circuit, comprising:
the first to N-th voltage acquisition assemblies are sequentially connected and acquire the stack voltage of the fuel cell, wherein each voltage acquisition assembly is provided with a plurality of acquisition channels;
the first isolation component is connected with the first voltage acquisition component, and the second isolation component is connected with the Nth voltage acquisition component and is used for isolating interference signals except voltage signals; and
the control assembly is respectively connected with the first isolation assembly and the second isolation assembly and is used for identifying the actual polarity of the current pile voltage of the fuel cell while controlling the first to N-th voltage acquisition assemblies to acquire the current pile voltage of the fuel cell according to the voltage acquisition instruction.
2. The circuit of claim 1, wherein each of the first through nth voltage acquisition components comprises:
the first to M-th voltage acquisition channels are used for acquiring the stack voltages of the first to M-th channels of the fuel cell;
the isolation unit is connected with the first path voltage acquisition channel, the second path voltage acquisition channel and the third path voltage acquisition channel and is used for isolating the interference signals except the voltage signals.
3. The circuit of claim 1, wherein the control assembly further comprises:
and the updating unit is used for detecting the updating program in real time and carrying out online real-time upgrading when the updating program is detected.
4. The circuit of claim 1, wherein the control assembly further comprises:
the broken wire detection unit is used for periodically sending a power-off detection instruction to the first to N-th voltage acquisition components and controlling the first to N-th voltage acquisition components to start broken wire detection.
5. The circuit of claim 4, further comprising:
and the reset component is connected with the control component and is used for resetting the control component when the control component meets the reset condition.
6. The circuit of claim 5, further comprising:
the power supply interface is used for supplying power to the battery voltage acquisition circuit after being connected with the direct-current power supply.
7. The circuit of claim 6, further comprising:
the first communication interface is arranged on the control assembly, is connected with the engine controller of the fuel cell and is used for sending the stack voltage information and the diagnosis information to the engine controller of the fuel cell;
the second communication interface is arranged on the control component and connected with a preset terminal, and is used for carrying out GUI monitoring and bootload upgrading on the battery voltage acquisition circuit.
8. The circuit of any one of claims 1-7, wherein,
the control assembly is communicated with the first to N voltage acquisition assemblies through a daisy chain.
9. A fuel cell voltage patrol instrument, comprising: a battery voltage acquisition circuit according to any one of claims 1 to 8.
10. A vehicle, characterized by comprising: the fuel cell voltage patrol instrument of claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220785690.6U CN218938444U (en) | 2022-03-30 | 2022-03-30 | Battery voltage acquisition circuit, fuel cell voltage inspection instrument and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220785690.6U CN218938444U (en) | 2022-03-30 | 2022-03-30 | Battery voltage acquisition circuit, fuel cell voltage inspection instrument and vehicle |
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| CN218938444U true CN218938444U (en) | 2023-04-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117949715A (en) * | 2024-03-27 | 2024-04-30 | 上海氢晨新能源科技有限公司 | Fuel cell voltage inspection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117949715A (en) * | 2024-03-27 | 2024-04-30 | 上海氢晨新能源科技有限公司 | Fuel cell voltage inspection method |
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