CN114325452A - Single cell diagnosis assisting device for fuel cell test and fuel cell diagnosis method - Google Patents
Single cell diagnosis assisting device for fuel cell test and fuel cell diagnosis method Download PDFInfo
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- CN114325452A CN114325452A CN202011054210.0A CN202011054210A CN114325452A CN 114325452 A CN114325452 A CN 114325452A CN 202011054210 A CN202011054210 A CN 202011054210A CN 114325452 A CN114325452 A CN 114325452A
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Abstract
The invention discloses a single cell diagnosis auxiliary device for a fuel cell test and a fuel cell diagnosis method. The device includes: the system comprises a battery pack anode relay, a battery pack cathode relay, a battery single anode relay, a battery single cathode relay, a relay controller, an anode diagnosis wiring piece and a cathode diagnosis wiring piece which are respectively connected with anode and cathode detection ends of a diagnosis instrument, a battery pack anode wiring piece and a battery pack cathode wiring piece which are respectively connected with the anode and cathode of the battery pack, and a battery single wiring piece which is connected with a bipolar plate between adjacent single batteries; the battery pack positive wiring piece is connected with the positive diagnosis wiring piece through the battery pack positive relay, the battery pack negative wiring piece is connected with the negative diagnosis wiring piece through the battery pack negative relay, the battery single wiring piece is connected with the positive diagnosis wiring piece through the battery single positive relay, and the battery single wiring piece is further connected with the negative diagnosis wiring piece through the battery single negative relay. The invention has no electric shock risk and convenient operation.
Description
Technical Field
The invention relates to the technical field of battery testing, in particular to a monocell diagnosis auxiliary device for a fuel cell test and a fuel cell diagnosis method.
Background
Fuel cells often require measurements of individual cells to determine the output state of the fuel cell during testing. For example, in a fuel cell test, it is generally necessary to monitor the output voltage of each unit cell of the fuel cell so as to visually see whether each unit cell of the fuel cell is abnormal. In addition, the dry and wet state inside the fuel cell can be judged by the alternating current impedance tester during the test of the fuel cell.
In the prior art, if the voltage output of a certain single battery is abnormal in the test process, a tester generally needs to use a measuring tool such as a multimeter to measure and confirm the single battery displaying the abnormal voltage so as to eliminate whether the voltage output is caused by poor contact of a voltage acquisition line. However, the voltage and current of the fuel cell are high in the working output state, the risk of electric shock exists when the voltage collecting line is directly operated and measured, and meanwhile, the risk of contact short circuit or disconnection caused by mistaken touch of other single cell voltage collecting lines can also exist in the operation process. For another example, the dry and wet state inside the fuel cell can be judged by the ac impedance tester during the test of the fuel cell, but the signal acquisition interfaces of the ac impedance tester are few, and generally only the ac impedance of the whole stack of the fuel cell is measured, but if the ac impedance of each single cell or a part of the single cells of the fuel cell is measured, the position of the acquisition line of the ac impedance tester needs to be changed continuously, so the operation is very inconvenient and the time consumption is long.
Disclosure of Invention
The invention aims to provide a single cell diagnosis auxiliary device for a fuel cell test and a fuel cell diagnosis method, which have no electric shock risk and are convenient to operate.
In order to achieve the purpose, the invention provides the following scheme:
a single cell diagnosis assistance device for a fuel cell test includes:
a diagnostic instrument wiring piece comprising: the positive pole diagnosis wiring piece is used for being connected with the positive pole detection end of the diagnosis instrument and the negative pole diagnosis wiring piece is used for being connected with the negative pole detection end of the diagnosis instrument;
a battery test connection piece comprising: the battery pack comprises a battery pack positive electrode wiring piece used for being connected with a battery pack positive electrode, a battery pack negative electrode wiring piece used for being connected with a battery pack negative electrode and a battery single electrode wiring piece used for being connected with a bipolar plate between adjacent single batteries;
a relay set comprising: the battery pack comprises a battery pack anode relay, a battery pack cathode relay, a battery monomer anode relay and a battery monomer cathode relay;
the relay controller is connected with the control end of each relay and is used for controlling the on-off of each relay;
wherein, the anodal wiring piece of group battery passes through the anodal relay of group battery with anodal diagnosis wiring piece is connected, group battery negative pole wiring piece passes through group battery negative pole relay with negative pole diagnosis wiring piece is connected, battery monomer wiring piece passes through battery monomer anodal relay with anodal diagnosis wiring piece is connected, battery monomer wiring piece still passes through battery monomer negative pole relay with negative pole diagnosis wiring piece is connected.
Optionally, the device further comprises an indicator light corresponding to each of the battery detection wiring pieces, and the indicator light corresponding to one of the battery detection wiring pieces is connected to the dc power supply through an auxiliary contact in a relay connected to the wiring piece.
Optionally, the number of the battery cell wiring pieces is two or more.
Optionally, the apparatus further comprises a diagnostic relay, and the positive diagnostic connection and the negative diagnostic connection are connected to each relay in the relay group through the diagnostic relay.
Optionally, each relay is a normally open relay.
Optionally, the apparatus further comprises: and the human-computer interaction equipment is electrically connected with the relay controller and is used for inputting the position of the measuring point.
Optionally, the human-computer interaction device is a touch screen.
The invention also provides a fuel cell diagnosis method, which is applied to the single cell diagnosis auxiliary device for the fuel cell test, and comprises the following steps:
before testing, connecting a positive diagnosis wiring piece to a positive detection end of a diagnosis instrument, connecting a negative diagnosis wiring piece to a negative detection end of the diagnosis instrument, connecting a positive wiring piece of a battery pack to a positive electrode of the battery pack, connecting a negative wiring piece of the battery pack to a negative electrode of the battery pack, and connecting single battery wiring pieces to bipolar plates between adjacent single batteries;
during testing, determining the measuring position of a single battery or a single battery combination to be tested; determining a relay to be closed according to the measurement position of the single battery or the single battery combination to be tested, and recording the relay as the relay to be closed; and the relay controller controls the relay to be closed.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the monocell diagnosis auxiliary device for the fuel cell test is provided with a cell detection wiring piece, a diagnosis instrument wiring piece and a relay between the cell detection wiring piece and the diagnosis instrument wiring piece, wherein each cell detection wiring piece is correspondingly connected to two ends of a cell and a bipolar plate between adjacent single cells before the test, and when the test is carried out, the voltage of two ends of a specified cell or the voltage of two ends of a specified cell combination is measured by controlling the closing of the relay between the cell detection wiring piece and the diagnosis instrument wiring piece.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of a single cell diagnosis auxiliary device for a fuel cell test according to an embodiment of the present invention.
1. A negative diagnostic connection piece; 2. a positive diagnostic connection piece; 3. diagnosing the relay; 4. a coil of the diagnostic relay; 5. a negative contact; 6. a positive electrode contact; 7. a battery pack cathode relay; 8. a coil of a battery pack cathode relay; 9. a main contact of a battery pack cathode relay; 10. an auxiliary contact of a battery pack cathode relay; 11. a first indicator light; 12. a battery negative terminal; 13. a first cell negative relay; 14. a coil of a first cell cathode relay; 15. a main contact of a first battery cell negative relay; 16. an auxiliary contact of the first battery cell cathode relay; 17. a first cell positive relay; 18. a coil of a first cell positive relay; 19. a main contact of a first battery cell positive relay; 20. an auxiliary contact of the first battery cell positive relay; 21. a second indicator light; 22. a first cell connection piece; 23. a second cell negative relay; 24. a coil of a second cell cathode relay; 25. a main contact of a second battery cell cathode relay; 26. an auxiliary contact of the second battery cell cathode relay; 27. a second cell positive relay; 28. a coil of a second battery cell positive relay; 29. a main contact of a second battery cell positive relay; 30. an auxiliary contact of the second battery cell positive relay; 31. a third indicator light; 32. a second cell connection piece; 33. a direct current power supply; 34. a relay controller; 35. a touch screen; 36. a negative diagnostic battery position input box; 37. a positive diagnostic battery position input box.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, the present embodiment provides a single cell diagnosis assistance apparatus for a fuel cell test, the apparatus including: diagnostic instrumentation wiring, battery test wiring, relay group and relay controller 34 etc, wherein, diagnostic instrumentation wiring includes: the positive pole diagnosis wiring piece 2 and negative pole diagnosis wiring piece 1, positive pole diagnosis wiring piece 2 is used for being connected with the positive pole detection end of diagnostic instrument, and negative pole diagnosis wiring piece 1 is used for being connected with the negative pole detection end of diagnostic instrument. The battery detection wiring member includes: the battery pack comprises a battery pack positive wiring piece, a battery pack negative wiring piece 12 and battery single wiring pieces, wherein the battery pack positive wiring piece is used for being connected with a battery pack positive electrode, the battery pack negative wiring piece 12 is used for being connected with a battery pack negative electrode, and the battery single wiring piece is used for being connected with a bipolar plate between adjacent single batteries. The relay unit includes: a battery pack anode relay, a battery pack cathode relay 7, a battery single anode relay and a battery single cathode relay. The relay controller 34 is connected to the control terminals of the relays, and controls the on/off of the relays. The battery pack positive wiring piece is connected with the positive diagnosis wiring piece 2 through a battery pack positive relay, the battery pack negative wiring piece 12 is connected with the negative diagnosis wiring piece 1 through a battery pack negative relay 7, the battery single wiring piece is connected with the positive diagnosis wiring piece 2 through a battery single positive relay, and the battery single wiring piece is further connected with the negative diagnosis wiring piece 1 through a battery single negative relay. Specifically, as shown in fig. 1, the battery negative terminal 12 is connected to the negative diagnosis terminal 1 via the main contact 9 of the battery negative relay. The first cell terminal 22 is connected to the positive diagnostic terminal 2 via the main contact 19 of the first cell positive relay and to the negative diagnostic terminal 1 via the main contact 15 of the first cell negative relay. The second cell terminal 32 is connected to the positive diagnostic terminal 2 via the main contact 29 of the second cell positive relay and to the negative diagnostic terminal 1 via the main contact 25 of the second cell negative relay. By analogy, there may also be a third cell connection piece, a fourth cell connection piece, etc., which is also connected in the same way to the diagnostic instrument connection piece. The coil 8 of the battery pack negative relay, the coil 18 of the first cell positive relay, the coil 14 of the first cell negative relay, the coil 28 of the second cell positive relay, and the coil 24 of the second cell negative relay are all controlled by the relay controller 34.
As a preferable embodiment, the single cell diagnosis assisting device for fuel cell test provided in this embodiment further includes indicator lamps corresponding to respective ones of the cell detection wiring members, and the indicator lamp corresponding to one of the cell detection wiring members is connected to the dc power supply through an auxiliary contact in the relay connected to the wiring member. Specifically, as shown in fig. 1, the first indicator light 11 is connected to the dc power supply 33 through the auxiliary contact 10 of the battery pack negative relay. The second indicator light 21 is connected to the dc power supply 33 through the auxiliary contact 20 of the first cell positive relay, and the second indicator light 21 is also connected to the dc power supply 33 through the auxiliary contact 16 of the first cell negative relay. The third indicator light 31 is connected to the dc power supply 33 through the auxiliary contact 30 of the second cell positive relay, and the third indicator light 31 is also connected to the dc power supply 33 through the auxiliary contact 26 of the second cell negative relay.
As a preferable embodiment, the unit cell diagnosis assisting apparatus for a fuel cell test provided in this embodiment further includes a diagnosis relay 3, and the positive diagnosis wiring member and the negative diagnosis wiring member are connected to each relay in the relay group through the diagnosis relay. Specifically, as shown in fig. 1, the negative diagnosis wiring member 1 is electrically connected to the battery negative electrode relay 7, the first battery cell negative electrode relay 13, and the second battery cell negative electrode relay 23 through the negative contact 5 in the diagnosis relay, the positive diagnosis wiring member 2 is electrically connected to the battery positive electrode relay, the first battery cell positive electrode relay 17, and the second battery cell positive electrode relay 27 through the positive contact 6 in the diagnosis relay, and the coil 4 of the diagnosis relay is controlled by the relay controller 34.
In this embodiment, each relay is a normally open relay.
As a preferable embodiment, the unit cell diagnosis assistance device for a fuel cell test according to the present embodiment further includes: and the human-computer interaction equipment is electrically connected with the relay controller and is used for inputting the position of the measuring point. Specifically, as shown in fig. 1, the human-computer interaction device is a touch screen 35. The two ends to be tested can be input in the negative diagnostic battery position input box 36 and the positive diagnostic battery position input box 37 on the touch screen, and the relay controller 34 controls the closing of the corresponding relays according to the input positions.
In this embodiment, the negative diagnosis wiring member 1 and the positive diagnosis wiring member 2 can be connected to a negative terminal and a positive terminal of a measurement device such as an ac impedance tester and a multimeter. Before testing, the positive diagnosis wiring piece 2 is connected to the positive detection end of a diagnosis instrument, the negative diagnosis wiring piece 1 is connected to the negative detection end of the diagnosis instrument, the positive wiring piece of the battery pack is connected to the positive electrode of the battery pack, the negative wiring piece 12 of the battery pack is connected to the negative electrode of the battery pack, and the single battery wiring pieces are connected to a bipolar plate between adjacent single batteries. During testing, determining the measuring position of a single battery or a single battery combination to be tested; determining a relay to be closed according to the measurement position of the single battery or the single battery combination to be tested, and recording the relay as the relay to be closed; and the relay controller controls the relay to be closed. Specifically, the following may be mentioned: taking the measurement of the voltage across the first single battery as an example, the touch screen 35 inputs a number 0 into the negative diagnosis battery position input box 36, and inputs a number 1 into the positive diagnosis single battery position input box 37, and at this time, the relay controller 34 controls the coil 8 of the battery pack negative relay and the coil 18 of the first single battery positive relay to be energized. A main contact 9 of a battery pack cathode relay is closed, an auxiliary contact 10 of the battery pack cathode relay is closed, and a power supply loop of a first indicator light 11 is communicated and lighted; the main contact 19 of the first battery single anode relay is closed, the auxiliary contact 20 of the first battery single anode relay is closed, and the power supply loop of the second indicator light 21 is communicated and lighted; then the relay controller 34 controls the coil 4 of the diagnosis relay to be electrified, and the negative contact 5 of the diagnosis relay and the positive contact 6 of the diagnosis relay are closed, so that the negative measuring end and the positive measuring end of the diagnosis instrument are electrically connected with the negative electrode of the battery pack and the first single cell plate of the fuel cell. Similarly, the measurement of the voltage across the other single cells or the voltage across the battery pack composed of several continuous single cells can be realized by referring to the above method.
The single cell diagnosis auxiliary device for the fuel cell test has the following advantages:
(1) the relay at the corresponding position of the diagnosis monocell is automatically closed through the relay controller, so that the hot-line operation of the fuel cell is avoided, and the auxiliary measurement connection can be conveniently and quickly completed to the monocell to be diagnosed.
(2) The negative pole diagnosis wiring piece and the positive pole diagnosis wiring piece can be compatibly connected with various diagnosis and measurement devices, such as an alternating current impedance tester, a multimeter, a voltmeter and the like, and provide convenience for diagnosis and test of abnormal voltage problems of single cells, local dry and wet degree distribution of the fuel cell and the like.
(3) The diagnosis indicator lamp is arranged, and the single battery under test and diagnosis can be visually displayed.
(4) Greatly simplifying the wiring operation of single cell diagnosis in the fuel cell test, shortening the time for the diagnosis test, improving the test efficiency and reducing the test cost.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A single cell diagnosis assistance device for a fuel cell test is characterized by comprising:
a diagnostic instrument wiring piece comprising: the positive pole diagnosis wiring piece is used for being connected with the positive pole detection end of the diagnosis instrument and the negative pole diagnosis wiring piece is used for being connected with the negative pole detection end of the diagnosis instrument;
a battery test connection piece comprising: the battery pack comprises a battery pack positive electrode wiring piece used for being connected with a battery pack positive electrode, a battery pack negative electrode wiring piece used for being connected with a battery pack negative electrode and a battery single electrode wiring piece used for being connected with a bipolar plate between adjacent single batteries;
a relay set comprising: the battery pack comprises a battery pack anode relay, a battery pack cathode relay, a battery monomer anode relay and a battery monomer cathode relay;
the relay controller is connected with the control end of each relay and is used for controlling the on-off of each relay;
wherein, the anodal wiring piece of group battery passes through the anodal relay of group battery with anodal diagnosis wiring piece is connected, group battery negative pole wiring piece passes through group battery negative pole relay with negative pole diagnosis wiring piece is connected, battery monomer wiring piece passes through battery monomer anodal relay with anodal diagnosis wiring piece is connected, battery monomer wiring piece still passes through battery monomer negative pole relay with negative pole diagnosis wiring piece is connected.
2. The cell diagnosis assistance device for a fuel cell test as recited in claim 1, further comprising an indicator lamp corresponding to each of the cell detection wiring members, the indicator lamp corresponding to one of the cell detection wiring members being connected to a direct current power supply through an auxiliary contact in a relay connected to the wiring member.
3. The cell diagnosis assistance device for a fuel cell test according to claim 1, wherein the number of the cell wiring members is two or more.
4. The cell diagnosis assistance apparatus for a fuel cell test according to claim 1, further comprising a diagnosis relay, wherein the positive diagnosis wiring member and the negative diagnosis wiring member are connected to each relay in the relay group through the diagnosis relay.
5. The cell diagnosis assistance apparatus for a fuel cell test according to claim 1 or 4, wherein each of the relays is a normally open relay.
6. The cell diagnosis assistance apparatus for a fuel cell test according to claim 1, characterized by further comprising: and the human-computer interaction equipment is electrically connected with the relay controller and is used for inputting the position of the measuring point.
7. The single cell diagnosis assistance device for a fuel cell test according to claim 6, wherein the human-computer interaction device is a touch panel.
8. A fuel cell diagnosis method applied to a unit cell diagnosis assistance apparatus for a fuel cell test according to any one of claims 1 to 7, the method comprising:
before testing, connecting a positive diagnosis wiring piece to a positive detection end of a diagnosis instrument, connecting a negative diagnosis wiring piece to a negative detection end of the diagnosis instrument, connecting a positive wiring piece of a battery pack to a positive electrode of the battery pack, connecting a negative wiring piece of the battery pack to a negative electrode of the battery pack, and connecting single battery wiring pieces to bipolar plates between adjacent single batteries;
during testing, determining the measuring position of a single battery or a single battery combination to be tested; determining a relay to be closed according to the measurement position of the single battery or the single battery combination to be tested, and recording the relay as the relay to be closed; and the relay controller controls the relay to be closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011054210.0A CN114325452A (en) | 2020-09-30 | 2020-09-30 | Single cell diagnosis assisting device for fuel cell test and fuel cell diagnosis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011054210.0A CN114325452A (en) | 2020-09-30 | 2020-09-30 | Single cell diagnosis assisting device for fuel cell test and fuel cell diagnosis method |
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| Publication Number | Publication Date |
|---|---|
| CN114325452A true CN114325452A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011054210.0A Pending CN114325452A (en) | 2020-09-30 | 2020-09-30 | Single cell diagnosis assisting device for fuel cell test and fuel cell diagnosis method |
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| CN (1) | CN114325452A (en) |
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- 2020-09-30 CN CN202011054210.0A patent/CN114325452A/en active Pending
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